diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
| commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
| tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /Documentation/RCU/Design | |
| parent | Initial commit. (diff) | |
| download | linux-upstream/6.6.15.tar.xz linux-upstream/6.6.15.zip | |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
37 files changed, 28623 insertions, 0 deletions
diff --git a/Documentation/RCU/Design/Data-Structures/BigTreeClassicRCU.svg b/Documentation/RCU/Design/Data-Structures/BigTreeClassicRCU.svg new file mode 100644 index 0000000000..727e270b11 --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/BigTreeClassicRCU.svg @@ -0,0 +1,474 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:28:20 2015 --> + +<!-- Magnification: 3.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="9.1in" + height="8.9in" + viewBox="-66 -66 10932 10707" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="BigTreeClassicRCU.fig"> + <metadata + id="metadata106"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title></dc:title> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs104"> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow1Mend" + style="overflow:visible;"> + <path + id="path3864" + d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z " + style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;" + transform="scale(0.4) rotate(180) translate(10,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="973" + inkscape:window-height="1137" + id="namedview102" + showgrid="false" + inkscape:zoom="0.9743589" + inkscape:cx="409.50003" + inkscape:cy="400.49997" + inkscape:window-x="915" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="g4" /> + <g + style="stroke-width:.025in; fill:none" + id="g4"> + <!-- Line: box --> + <rect + x="0" + y="0" + width="10800" + height="5625" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffff00; " + id="rect6" /> + <!-- Line: box --> + <rect + x="1125" + y="3600" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect8" /> + <!-- Line: box --> + <rect + x="3825" + y="900" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect10" /> + <!-- Line: box --> + <rect + x="6525" + y="3600" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect12" /> + <!-- Line --> + <polyline + points="3375,6525 3375,5046 " + style="stroke:#00d1d1;stroke-width:44.9934641;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline14" /> + <!-- Arrowhead on XXXpoint 3375 6525 - 3375 4860--> + <!-- Circle --> + <circle + cx="7425" + cy="6075" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle18" /> + <!-- Circle --> + <circle + cx="7875" + cy="6075" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle20" /> + <!-- Circle --> + <circle + cx="8325" + cy="6075" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle22" /> + <!-- Circle --> + <circle + cx="2025" + cy="6075" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle24" /> + <!-- Circle --> + <circle + cx="2475" + cy="6075" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle26" /> + <!-- Circle --> + <circle + cx="2925" + cy="6075" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle28" /> + <!-- Circle --> + <circle + cx="4725" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle30" /> + <!-- Circle --> + <circle + cx="5175" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle32" /> + <!-- Circle --> + <circle + cx="5625" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle34" /> + <!-- Line: box --> + <rect + x="2025" + y="6525" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect36" /> + <!-- Line --> + <polyline + points="2475,3600 3975,2310 " + style="stroke:#00d1d1;stroke-width:44.9934641;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline38" /> + <!-- Arrowhead on XXXpoint 2475 3600 - 4116 2190--> + <!-- Line --> + <polyline + points="7875,3600 6372,2310 " + style="stroke:#00d1d1;stroke-width:44.9934641;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline42" /> + <!-- Arrowhead on XXXpoint 7875 3600 - 6231 2190--> + <!-- Line --> + <polyline + points="6975,8775 6975,5046 " + style="stroke:#00d1d1;stroke-width:44.9934641;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline46" /> + <!-- Arrowhead on XXXpoint 6975 8775 - 6975 4860--> + <!-- Line --> + <polyline + points="1575,8775 1575,5046 " + style="stroke:#00d1d1;stroke-width:44.9934641;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline50" /> + <!-- Arrowhead on XXXpoint 1575 8775 - 1575 4860--> + <!-- Line --> + <polyline + points="8775,6525 8775,5046 " + style="stroke:#00d1d1;stroke-width:44.9934641;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline54" /> + <!-- Arrowhead on XXXpoint 8775 6525 - 8775 4860--> + <!-- Text --> + <text + xml:space="preserve" + x="1575" + y="9225" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text58">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="1575" + y="9675" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text60">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="1575" + y="10350" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text62">CPU 0</text> + <!-- Text --> + <text + xml:space="preserve" + x="3375" + y="6975" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text64">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="3375" + y="7425" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text66">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="3375" + y="8100" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text68">CPU 15</text> + <!-- Text --> + <text + xml:space="preserve" + x="6975" + y="9225" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text70">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="6975" + y="9675" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text72">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="6975" + y="10350" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text74">CPU 1007</text> + <!-- Text --> + <text + xml:space="preserve" + x="8730" + y="6930" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text76">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="8730" + y="7380" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text78">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="8730" + y="8055" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text80">CPU 1023</text> + <!-- Text --> + <text + xml:space="preserve" + x="225" + y="450" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="start" + id="text82">struct rcu_state</text> + <!-- Text --> + <text + xml:space="preserve" + x="2475" + y="4050" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text84">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="2475" + y="4500" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text86">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="7875" + y="4500" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text88">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="7875" + y="4050" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text90">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5175" + y="1350" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text92">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5175" + y="1800" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text94">rcu_node</text> + <!-- Line: box --> + <rect + x="225" + y="8775" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect96" /> + <!-- Line: box --> + <rect + x="5625" + y="8775" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect98" /> + <!-- Line: box --> + <rect + x="7380" + y="6480" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect100" /> + </g> +</svg> diff --git a/Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntickCB.svg b/Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntickCB.svg new file mode 100644 index 0000000000..3a1a4f85dc --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/BigTreePreemptRCUBHdyntickCB.svg @@ -0,0 +1,662 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:29:48 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="7.4000001in" + height="7.9000001in" + viewBox="-44 -44 8938 9526.283" + id="svg2" + version="1.1" + inkscape:version="0.92.2pre0 (973e216, 2017-07-25)" + sodipodi:docname="BigTreePreemptRCUBHdyntickCB.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title></dc:title> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="marker1177" + style="overflow:visible" + inkscape:isstock="true"> + <path + id="path897" + d="M 0,0 5,-5 -12.5,0 5,5 Z" + style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Lend" + style="overflow:visible" + inkscape:isstock="true"> + <path + id="path891" + d="M 0,0 5,-5 -12.5,0 5,5 Z" + style="fill:#000000;fill-opacity:1;fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt;stroke-opacity:1" + transform="matrix(-0.8,0,0,-0.8,-10,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 Z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1920" + inkscape:window-height="1019" + id="namedview208" + showgrid="false" + inkscape:zoom="1.0195195" + inkscape:cx="166.25478" + inkscape:cy="362.18693" + inkscape:window-x="0" + inkscape:window-y="0" + inkscape:window-maximized="1" + inkscape:current-layer="g4" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(0,-2415.6743)"> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8550 - 5710 6240--> + <polyline + points="5714 6518 5704 6272 5598 6494 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline20" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9750 - 4512 7590--> + <polyline + points="4514 7868 4506 7622 4396 7844 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline24" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1040 9750 - 1502 7590--> + <polyline + points="1504 7868 1496 7622 1386 7844 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline28" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2240 8550 - 2702 6390--> + <polyline + points="2704 6668 2696 6422 2586 6644 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline32" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9600 - 5744 5948--> + <polyline + points="5682 6220 5730 5978 5574 6170 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline36" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1086 9600 - 2780 5948--> + <polyline + points="2718 6220 2766 5978 2610 6170 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline40" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Line: box --> + <rect + x="12.340758" + y="2442.5947" + width="6300" + height="7045.3135" + rx="0" + style="fill:#ffffff;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect42" /> + <!-- Line: box --> + <rect + x="312.34076" + y="3017.7224" + width="5700" + height="3594.5476" + rx="0" + style="fill:#ffff00;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect44" /> + <!-- Line --> + <polyline + points="1350,3900 2350,3040 " + style="stroke:#00d1d1;stroke-width:29.99464035;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline46" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Arrowhead on XXXpoint 1350 3900 - 2444 2960--> + <!-- Line --> + <polyline + points="4950,3900 3948,3040 " + style="stroke:#00d1d1;stroke-width:29.99464035;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline50" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Arrowhead on XXXpoint 4950 3900 - 3854 2960--> + <!-- Line --> + <polyline + points="4050,7050 4050,4864 " + style="stroke:#00d1d1;stroke-width:29.99464035;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline54" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Arrowhead on XXXpoint 4050 7050 - 4050 4740--> + <!-- Line --> + <polyline + points="1050,7050 1050,4864 " + style="stroke:#00d1d1;stroke-width:29.99464035;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline58" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Arrowhead on XXXpoint 1050 7050 - 1050 4740--> + <!-- Line --> + <polyline + points="2250,5850 2250,4864 " + style="stroke:#00d1d1;stroke-width:29.99464035;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline62" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Arrowhead on XXXpoint 2250 5850 - 2250 4740--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 8550 - 2250 6690--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 9750 - 1050 7890--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9750 - 4050 7890--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8550 - 5250 6690--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 6000 6300 - 8146 7986--> + <!-- Circle --> + <ellipse + cx="2862.3408" + cy="5749.5786" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle86" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="3162.3408" + cy="5749.5786" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle88" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="3462.3408" + cy="5749.5786" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle90" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="1362.3407" + cy="6899.834" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle92" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="1662.3407" + cy="6899.834" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle94" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="1962.3407" + cy="6899.834" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle96" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="4362.3408" + cy="6899.834" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle98" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="4662.3408" + cy="6899.834" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle100" + rx="76" + ry="72.849495" /> + <!-- Circle --> + <ellipse + cx="4962.3408" + cy="6899.834" + style="fill:#000000;stroke:#000000;stroke-width:13.70675087" + id="circle102" + rx="76" + ry="72.849495" /> + <!-- Line: box --> + <rect + x="6745.3027" + y="8146.0654" + width="1500" + height="862.69141" + rx="0" + style="stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect104" /> + <!-- Line: box --> + <rect + x="6745.3027" + y="9583.8857" + width="1500" + height="862.69141" + rx="0" + style="stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect106" /> + <!-- Line --> + <polyline + points="8100,8850 8100,9384 " + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter;marker-end:url(#Arrow1Mend)" + id="polyline108" + transform="matrix(1,0,0,0.95854605,-604.69715,525.62477)" /> + <!-- Arrowhead on XXXpoint 8100 8850 - 8100 9510--> + <!-- Line: box --> + <rect + x="6745.3027" + y="11021.704" + width="1500" + height="862.69141" + rx="0" + style="stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112" /> + <!-- Line --> + <polyline + points="8100,10350 8100,10884 " + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter;marker-end:url(#Arrow1Mend)" + id="polyline114" + transform="matrix(1,0,0,0.95854605,-604.69715,525.62477)" /> + <!-- Arrowhead on XXXpoint 8100 10350 - 8100 11010--> + <!-- Line: box --> + <rect + x="762.34076" + y="5318.2324" + width="1800" + height="862.69141" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect118" /> + <!-- Line: box --> + <rect + x="312.34076" + y="8337.6533" + width="1500" + height="862.69141" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect120" /> + <!-- Line: box --> + <rect + x="3762.3408" + y="5318.2324" + width="1800" + height="862.69141" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect122" /> + <!-- Line: box --> + <rect + x="4512.3408" + y="7187.3975" + width="1500" + height="862.69141" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect124" /> + <!-- Line: box --> + <rect + x="3312.3408" + y="8337.6533" + width="1500" + height="862.69141" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect126" /> + <!-- Line: box --> + <rect + x="2262.3408" + y="3592.8503" + width="1800" + height="862.69141" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect128" /> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <rect + x="1512.3407" + y="7187.3975" + width="1500" + height="862.69141" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:29.37160873;stroke-linecap:butt;stroke-linejoin:miter" + id="rect138" /> + <!-- Text --> + <text + xml:space="preserve" + x="7338.3037" + y="8614.0625" + font-style="normal" + font-weight="bold" + font-size="192" + id="text140" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="7338.3037" + y="8907.7783" + font-style="normal" + font-weight="bold" + font-size="192" + id="text142" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_head</text> + <!-- Text --> + <text + xml:space="preserve" + x="7338.3037" + y="10082.644" + font-style="normal" + font-weight="bold" + font-size="192" + id="text144" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="7338.3037" + y="10376.36" + font-style="normal" + font-weight="bold" + font-size="192" + id="text146" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_head</text> + <!-- Text --> + <text + xml:space="preserve" + x="7338.3037" + y="11551.224" + font-style="normal" + font-weight="bold" + font-size="192" + id="text148" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="7338.3037" + y="11844.94" + font-style="normal" + font-weight="bold" + font-size="192" + id="text150" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_head</text> + <!-- Text --> + <text + xml:space="preserve" + x="5886.4043" + y="2788.5688" + font-style="normal" + font-weight="normal" + font-size="192" + id="text152" + style="font-style:normal;font-weight:normal;font-size:187.978302px;font-family:Helvetica;text-anchor:end;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_state</text> + <!-- Text --> + <!-- Text --> + <text + xml:space="preserve" + x="3096.1016" + y="3963.4336" + font-style="normal" + font-weight="bold" + font-size="192" + id="text156" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="3096.1016" + y="4257.1494" + font-style="normal" + font-weight="bold" + font-size="192" + id="text158" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="1627.5209" + y="5725.7305" + font-style="normal" + font-weight="bold" + font-size="192" + id="text160" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="1627.5209" + y="6019.4463" + font-style="normal" + font-weight="bold" + font-size="192" + id="text162" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="4564.6821" + y="6019.4463" + font-style="normal" + font-weight="bold" + font-size="192" + id="text164" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="4564.6821" + y="5725.7305" + font-style="normal" + font-weight="bold" + font-size="192" + id="text166" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="2214.9531" + y="7634.8848" + font-style="normal" + font-weight="bold" + font-size="192" + id="text168" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="2214.9531" + y="7928.6011" + font-style="normal" + font-weight="bold" + font-size="192" + id="text170" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="1040.0886" + y="8809.749" + font-style="normal" + font-weight="bold" + font-size="192" + id="text172" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="1040.0886" + y="9103.4648" + font-style="normal" + font-weight="bold" + font-size="192" + id="text174" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="5152.1138" + y="7634.8848" + font-style="normal" + font-weight="bold" + font-size="192" + id="text176" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5152.1138" + y="7928.6011" + font-style="normal" + font-weight="bold" + font-size="192" + id="text178" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="3977.2495" + y="8809.749" + font-style="normal" + font-weight="bold" + font-size="192" + id="text180" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="3977.2495" + y="9103.4648" + font-style="normal" + font-weight="bold" + font-size="192" + id="text182" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:middle;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="452.6564" + y="3376.0012" + font-style="normal" + font-weight="bold" + font-size="192" + id="text184" + style="font-style:normal;font-weight:bold;font-size:187.978302px;font-family:Courier;text-anchor:start;fill:#000000;stroke-width:0.02447634in" + transform="scale(1.0213945,0.97905363)">struct rcu_state</text> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Line --> + <polyline + points="5250,5850 5250,4864 " + style="stroke:#00d1d1;stroke-width:29.99464035;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline204" + transform="matrix(1,0,0,0.95854605,12.340758,1579.9033)" /> + <!-- Arrowhead on XXXpoint 5250 5850 - 5250 4740--> + <path + style="fill:none;stroke:#000000;stroke-width:34.24744034;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;marker-end:url(#marker1177)" + d="m 6000.1472,7564.2558 c 1498.5508,0 1498.5508,0 1498.5508,0 v 520.0252" + id="path886" + inkscape:connector-curvature="0" /> + </g> +</svg> diff --git a/Documentation/RCU/Design/Data-Structures/Data-Structures.rst b/Documentation/RCU/Design/Data-Structures/Data-Structures.rst new file mode 100644 index 0000000000..b34990c7c3 --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/Data-Structures.rst @@ -0,0 +1,1163 @@ +=================================================== +A Tour Through TREE_RCU's Data Structures [LWN.net] +=================================================== + +December 18, 2016 + +This article was contributed by Paul E. McKenney + +Introduction +============ + +This document describes RCU's major data structures and their relationship +to each other. + +Data-Structure Relationships +============================ + +RCU is for all intents and purposes a large state machine, and its +data structures maintain the state in such a way as to allow RCU readers +to execute extremely quickly, while also processing the RCU grace periods +requested by updaters in an efficient and extremely scalable fashion. +The efficiency and scalability of RCU updaters is provided primarily +by a combining tree, as shown below: + +.. kernel-figure:: BigTreeClassicRCU.svg + +This diagram shows an enclosing ``rcu_state`` structure containing a tree +of ``rcu_node`` structures. Each leaf node of the ``rcu_node`` tree has up +to 16 ``rcu_data`` structures associated with it, so that there are +``NR_CPUS`` number of ``rcu_data`` structures, one for each possible CPU. +This structure is adjusted at boot time, if needed, to handle the common +case where ``nr_cpu_ids`` is much less than ``NR_CPUs``. +For example, a number of Linux distributions set ``NR_CPUs=4096``, +which results in a three-level ``rcu_node`` tree. +If the actual hardware has only 16 CPUs, RCU will adjust itself +at boot time, resulting in an ``rcu_node`` tree with only a single node. + +The purpose of this combining tree is to allow per-CPU events +such as quiescent states, dyntick-idle transitions, +and CPU hotplug operations to be processed efficiently +and scalably. +Quiescent states are recorded by the per-CPU ``rcu_data`` structures, +and other events are recorded by the leaf-level ``rcu_node`` +structures. +All of these events are combined at each level of the tree until finally +grace periods are completed at the tree's root ``rcu_node`` +structure. +A grace period can be completed at the root once every CPU +(or, in the case of ``CONFIG_PREEMPT_RCU``, task) +has passed through a quiescent state. +Once a grace period has completed, record of that fact is propagated +back down the tree. + +As can be seen from the diagram, on a 64-bit system +a two-level tree with 64 leaves can accommodate 1,024 CPUs, with a fanout +of 64 at the root and a fanout of 16 at the leaves. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why isn't the fanout at the leaves also 64? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Because there are more types of events that affect the leaf-level | +| ``rcu_node`` structures than further up the tree. Therefore, if the | +| leaf ``rcu_node`` structures have fanout of 64, the contention on | +| these structures' ``->structures`` becomes excessive. Experimentation | +| on a wide variety of systems has shown that a fanout of 16 works well | +| for the leaves of the ``rcu_node`` tree. | +| | +| Of course, further experience with systems having hundreds or | +| thousands of CPUs may demonstrate that the fanout for the non-leaf | +| ``rcu_node`` structures must also be reduced. Such reduction can be | +| easily carried out when and if it proves necessary. In the meantime, | +| if you are using such a system and running into contention problems | +| on the non-leaf ``rcu_node`` structures, you may use the | +| ``CONFIG_RCU_FANOUT`` kernel configuration parameter to reduce the | +| non-leaf fanout as needed. | +| | +| Kernels built for systems with strong NUMA characteristics might | +| also need to adjust ``CONFIG_RCU_FANOUT`` so that the domains of | +| the ``rcu_node`` structures align with hardware boundaries. | +| However, there has thus far been no need for this. | ++-----------------------------------------------------------------------+ + +If your system has more than 1,024 CPUs (or more than 512 CPUs on a +32-bit system), then RCU will automatically add more levels to the tree. +For example, if you are crazy enough to build a 64-bit system with +65,536 CPUs, RCU would configure the ``rcu_node`` tree as follows: + +.. kernel-figure:: HugeTreeClassicRCU.svg + +RCU currently permits up to a four-level tree, which on a 64-bit system +accommodates up to 4,194,304 CPUs, though only a mere 524,288 CPUs for +32-bit systems. On the other hand, you can set both +``CONFIG_RCU_FANOUT`` and ``CONFIG_RCU_FANOUT_LEAF`` to be as small as +2, which would result in a 16-CPU test using a 4-level tree. This can be +useful for testing large-system capabilities on small test machines. + +This multi-level combining tree allows us to get most of the performance +and scalability benefits of partitioning, even though RCU grace-period +detection is inherently a global operation. The trick here is that only +the last CPU to report a quiescent state into a given ``rcu_node`` +structure need advance to the ``rcu_node`` structure at the next level +up the tree. This means that at the leaf-level ``rcu_node`` structure, +only one access out of sixteen will progress up the tree. For the +internal ``rcu_node`` structures, the situation is even more extreme: +Only one access out of sixty-four will progress up the tree. Because the +vast majority of the CPUs do not progress up the tree, the lock +contention remains roughly constant up the tree. No matter how many CPUs +there are in the system, at most 64 quiescent-state reports per grace +period will progress all the way to the root ``rcu_node`` structure, +thus ensuring that the lock contention on that root ``rcu_node`` +structure remains acceptably low. + +In effect, the combining tree acts like a big shock absorber, keeping +lock contention under control at all tree levels regardless of the level +of loading on the system. + +RCU updaters wait for normal grace periods by registering RCU callbacks, +either directly via ``call_rcu()`` or indirectly via +``synchronize_rcu()`` and friends. RCU callbacks are represented by +``rcu_head`` structures, which are queued on ``rcu_data`` structures +while they are waiting for a grace period to elapse, as shown in the +following figure: + +.. kernel-figure:: BigTreePreemptRCUBHdyntickCB.svg + +This figure shows how ``TREE_RCU``'s and ``PREEMPT_RCU``'s major data +structures are related. Lesser data structures will be introduced with +the algorithms that make use of them. + +Note that each of the data structures in the above figure has its own +synchronization: + +#. Each ``rcu_state`` structures has a lock and a mutex, and some fields + are protected by the corresponding root ``rcu_node`` structure's lock. +#. Each ``rcu_node`` structure has a spinlock. +#. The fields in ``rcu_data`` are private to the corresponding CPU, + although a few can be read and written by other CPUs. + +It is important to note that different data structures can have very +different ideas about the state of RCU at any given time. For but one +example, awareness of the start or end of a given RCU grace period +propagates slowly through the data structures. This slow propagation is +absolutely necessary for RCU to have good read-side performance. If this +balkanized implementation seems foreign to you, one useful trick is to +consider each instance of these data structures to be a different +person, each having the usual slightly different view of reality. + +The general role of each of these data structures is as follows: + +#. ``rcu_state``: This structure forms the interconnection between the + ``rcu_node`` and ``rcu_data`` structures, tracks grace periods, + serves as short-term repository for callbacks orphaned by CPU-hotplug + events, maintains ``rcu_barrier()`` state, tracks expedited + grace-period state, and maintains state used to force quiescent + states when grace periods extend too long, +#. ``rcu_node``: This structure forms the combining tree that propagates + quiescent-state information from the leaves to the root, and also + propagates grace-period information from the root to the leaves. It + provides local copies of the grace-period state in order to allow + this information to be accessed in a synchronized manner without + suffering the scalability limitations that would otherwise be imposed + by global locking. In ``CONFIG_PREEMPT_RCU`` kernels, it manages the + lists of tasks that have blocked while in their current RCU read-side + critical section. In ``CONFIG_PREEMPT_RCU`` with + ``CONFIG_RCU_BOOST``, it manages the per-\ ``rcu_node`` + priority-boosting kernel threads (kthreads) and state. Finally, it + records CPU-hotplug state in order to determine which CPUs should be + ignored during a given grace period. +#. ``rcu_data``: This per-CPU structure is the focus of quiescent-state + detection and RCU callback queuing. It also tracks its relationship + to the corresponding leaf ``rcu_node`` structure to allow + more-efficient propagation of quiescent states up the ``rcu_node`` + combining tree. Like the ``rcu_node`` structure, it provides a local + copy of the grace-period information to allow for-free synchronized + access to this information from the corresponding CPU. Finally, this + structure records past dyntick-idle state for the corresponding CPU + and also tracks statistics. +#. ``rcu_head``: This structure represents RCU callbacks, and is the + only structure allocated and managed by RCU users. The ``rcu_head`` + structure is normally embedded within the RCU-protected data + structure. + +If all you wanted from this article was a general notion of how RCU's +data structures are related, you are done. Otherwise, each of the +following sections give more details on the ``rcu_state``, ``rcu_node`` +and ``rcu_data`` data structures. + +The ``rcu_state`` Structure +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The ``rcu_state`` structure is the base structure that represents the +state of RCU in the system. This structure forms the interconnection +between the ``rcu_node`` and ``rcu_data`` structures, tracks grace +periods, contains the lock used to synchronize with CPU-hotplug events, +and maintains state used to force quiescent states when grace periods +extend too long, + +A few of the ``rcu_state`` structure's fields are discussed, singly and +in groups, in the following sections. The more specialized fields are +covered in the discussion of their use. + +Relationship to rcu_node and rcu_data Structures +'''''''''''''''''''''''''''''''''''''''''''''''' + +This portion of the ``rcu_state`` structure is declared as follows: + +:: + + 1 struct rcu_node node[NUM_RCU_NODES]; + 2 struct rcu_node *level[NUM_RCU_LVLS + 1]; + 3 struct rcu_data __percpu *rda; + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Wait a minute! You said that the ``rcu_node`` structures formed a | +| tree, but they are declared as a flat array! What gives? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| The tree is laid out in the array. The first node In the array is the | +| head, the next set of nodes in the array are children of the head | +| node, and so on until the last set of nodes in the array are the | +| leaves. | +| See the following diagrams to see how this works. | ++-----------------------------------------------------------------------+ + +The ``rcu_node`` tree is embedded into the ``->node[]`` array as shown +in the following figure: + +.. kernel-figure:: TreeMapping.svg + +One interesting consequence of this mapping is that a breadth-first +traversal of the tree is implemented as a simple linear scan of the +array, which is in fact what the ``rcu_for_each_node_breadth_first()`` +macro does. This macro is used at the beginning and ends of grace +periods. + +Each entry of the ``->level`` array references the first ``rcu_node`` +structure on the corresponding level of the tree, for example, as shown +below: + +.. kernel-figure:: TreeMappingLevel.svg + +The zero\ :sup:`th` element of the array references the root +``rcu_node`` structure, the first element references the first child of +the root ``rcu_node``, and finally the second element references the +first leaf ``rcu_node`` structure. + +For whatever it is worth, if you draw the tree to be tree-shaped rather +than array-shaped, it is easy to draw a planar representation: + +.. kernel-figure:: TreeLevel.svg + +Finally, the ``->rda`` field references a per-CPU pointer to the +corresponding CPU's ``rcu_data`` structure. + +All of these fields are constant once initialization is complete, and +therefore need no protection. + +Grace-Period Tracking +''''''''''''''''''''' + +This portion of the ``rcu_state`` structure is declared as follows: + +:: + + 1 unsigned long gp_seq; + +RCU grace periods are numbered, and the ``->gp_seq`` field contains the +current grace-period sequence number. The bottom two bits are the state +of the current grace period, which can be zero for not yet started or +one for in progress. In other words, if the bottom two bits of +``->gp_seq`` are zero, then RCU is idle. Any other value in the bottom +two bits indicates that something is broken. This field is protected by +the root ``rcu_node`` structure's ``->lock`` field. + +There are ``->gp_seq`` fields in the ``rcu_node`` and ``rcu_data`` +structures as well. The fields in the ``rcu_state`` structure represent +the most current value, and those of the other structures are compared +in order to detect the beginnings and ends of grace periods in a +distributed fashion. The values flow from ``rcu_state`` to ``rcu_node`` +(down the tree from the root to the leaves) to ``rcu_data``. + +Miscellaneous +''''''''''''' + +This portion of the ``rcu_state`` structure is declared as follows: + +:: + + 1 unsigned long gp_max; + 2 char abbr; + 3 char *name; + +The ``->gp_max`` field tracks the duration of the longest grace period +in jiffies. It is protected by the root ``rcu_node``'s ``->lock``. + +The ``->name`` and ``->abbr`` fields distinguish between preemptible RCU +(“rcu_preempt” and “p”) and non-preemptible RCU (“rcu_sched” and “s”). +These fields are used for diagnostic and tracing purposes. + +The ``rcu_node`` Structure +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The ``rcu_node`` structures form the combining tree that propagates +quiescent-state information from the leaves to the root and also that +propagates grace-period information from the root down to the leaves. +They provides local copies of the grace-period state in order to allow +this information to be accessed in a synchronized manner without +suffering the scalability limitations that would otherwise be imposed by +global locking. In ``CONFIG_PREEMPT_RCU`` kernels, they manage the lists +of tasks that have blocked while in their current RCU read-side critical +section. In ``CONFIG_PREEMPT_RCU`` with ``CONFIG_RCU_BOOST``, they +manage the per-\ ``rcu_node`` priority-boosting kernel threads +(kthreads) and state. Finally, they record CPU-hotplug state in order to +determine which CPUs should be ignored during a given grace period. + +The ``rcu_node`` structure's fields are discussed, singly and in groups, +in the following sections. + +Connection to Combining Tree +'''''''''''''''''''''''''''' + +This portion of the ``rcu_node`` structure is declared as follows: + +:: + + 1 struct rcu_node *parent; + 2 u8 level; + 3 u8 grpnum; + 4 unsigned long grpmask; + 5 int grplo; + 6 int grphi; + +The ``->parent`` pointer references the ``rcu_node`` one level up in the +tree, and is ``NULL`` for the root ``rcu_node``. The RCU implementation +makes heavy use of this field to push quiescent states up the tree. The +``->level`` field gives the level in the tree, with the root being at +level zero, its children at level one, and so on. The ``->grpnum`` field +gives this node's position within the children of its parent, so this +number can range between 0 and 31 on 32-bit systems and between 0 and 63 +on 64-bit systems. The ``->level`` and ``->grpnum`` fields are used only +during initialization and for tracing. The ``->grpmask`` field is the +bitmask counterpart of ``->grpnum``, and therefore always has exactly +one bit set. This mask is used to clear the bit corresponding to this +``rcu_node`` structure in its parent's bitmasks, which are described +later. Finally, the ``->grplo`` and ``->grphi`` fields contain the +lowest and highest numbered CPU served by this ``rcu_node`` structure, +respectively. + +All of these fields are constant, and thus do not require any +synchronization. + +Synchronization +''''''''''''''' + +This field of the ``rcu_node`` structure is declared as follows: + +:: + + 1 raw_spinlock_t lock; + +This field is used to protect the remaining fields in this structure, +unless otherwise stated. That said, all of the fields in this structure +can be accessed without locking for tracing purposes. Yes, this can +result in confusing traces, but better some tracing confusion than to be +heisenbugged out of existence. + +.. _grace-period-tracking-1: + +Grace-Period Tracking +''''''''''''''''''''' + +This portion of the ``rcu_node`` structure is declared as follows: + +:: + + 1 unsigned long gp_seq; + 2 unsigned long gp_seq_needed; + +The ``rcu_node`` structures' ``->gp_seq`` fields are the counterparts of +the field of the same name in the ``rcu_state`` structure. They each may +lag up to one step behind their ``rcu_state`` counterpart. If the bottom +two bits of a given ``rcu_node`` structure's ``->gp_seq`` field is zero, +then this ``rcu_node`` structure believes that RCU is idle. + +The ``>gp_seq`` field of each ``rcu_node`` structure is updated at the +beginning and the end of each grace period. + +The ``->gp_seq_needed`` fields record the furthest-in-the-future grace +period request seen by the corresponding ``rcu_node`` structure. The +request is considered fulfilled when the value of the ``->gp_seq`` field +equals or exceeds that of the ``->gp_seq_needed`` field. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Suppose that this ``rcu_node`` structure doesn't see a request for a | +| very long time. Won't wrapping of the ``->gp_seq`` field cause | +| problems? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| No, because if the ``->gp_seq_needed`` field lags behind the | +| ``->gp_seq`` field, the ``->gp_seq_needed`` field will be updated at | +| the end of the grace period. Modulo-arithmetic comparisons therefore | +| will always get the correct answer, even with wrapping. | ++-----------------------------------------------------------------------+ + +Quiescent-State Tracking +'''''''''''''''''''''''' + +These fields manage the propagation of quiescent states up the combining +tree. + +This portion of the ``rcu_node`` structure has fields as follows: + +:: + + 1 unsigned long qsmask; + 2 unsigned long expmask; + 3 unsigned long qsmaskinit; + 4 unsigned long expmaskinit; + +The ``->qsmask`` field tracks which of this ``rcu_node`` structure's +children still need to report quiescent states for the current normal +grace period. Such children will have a value of 1 in their +corresponding bit. Note that the leaf ``rcu_node`` structures should be +thought of as having ``rcu_data`` structures as their children. +Similarly, the ``->expmask`` field tracks which of this ``rcu_node`` +structure's children still need to report quiescent states for the +current expedited grace period. An expedited grace period has the same +conceptual properties as a normal grace period, but the expedited +implementation accepts extreme CPU overhead to obtain much lower +grace-period latency, for example, consuming a few tens of microseconds +worth of CPU time to reduce grace-period duration from milliseconds to +tens of microseconds. The ``->qsmaskinit`` field tracks which of this +``rcu_node`` structure's children cover for at least one online CPU. +This mask is used to initialize ``->qsmask``, and ``->expmaskinit`` is +used to initialize ``->expmask`` and the beginning of the normal and +expedited grace periods, respectively. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why are these bitmasks protected by locking? Come on, haven't you | +| heard of atomic instructions??? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Lockless grace-period computation! Such a tantalizing possibility! | +| But consider the following sequence of events: | +| | +| #. CPU 0 has been in dyntick-idle mode for quite some time. When it | +| wakes up, it notices that the current RCU grace period needs it to | +| report in, so it sets a flag where the scheduling clock interrupt | +| will find it. | +| #. Meanwhile, CPU 1 is running ``force_quiescent_state()``, and | +| notices that CPU 0 has been in dyntick idle mode, which qualifies | +| as an extended quiescent state. | +| #. CPU 0's scheduling clock interrupt fires in the middle of an RCU | +| read-side critical section, and notices that the RCU core needs | +| something, so commences RCU softirq processing. | +| #. CPU 0's softirq handler executes and is just about ready to report | +| its quiescent state up the ``rcu_node`` tree. | +| #. But CPU 1 beats it to the punch, completing the current grace | +| period and starting a new one. | +| #. CPU 0 now reports its quiescent state for the wrong grace period. | +| That grace period might now end before the RCU read-side critical | +| section. If that happens, disaster will ensue. | +| | +| So the locking is absolutely required in order to coordinate clearing | +| of the bits with updating of the grace-period sequence number in | +| ``->gp_seq``. | ++-----------------------------------------------------------------------+ + +Blocked-Task Management +''''''''''''''''''''''' + +``PREEMPT_RCU`` allows tasks to be preempted in the midst of their RCU +read-side critical sections, and these tasks must be tracked explicitly. +The details of exactly why and how they are tracked will be covered in a +separate article on RCU read-side processing. For now, it is enough to +know that the ``rcu_node`` structure tracks them. + +:: + + 1 struct list_head blkd_tasks; + 2 struct list_head *gp_tasks; + 3 struct list_head *exp_tasks; + 4 bool wait_blkd_tasks; + +The ``->blkd_tasks`` field is a list header for the list of blocked and +preempted tasks. As tasks undergo context switches within RCU read-side +critical sections, their ``task_struct`` structures are enqueued (via +the ``task_struct``'s ``->rcu_node_entry`` field) onto the head of the +``->blkd_tasks`` list for the leaf ``rcu_node`` structure corresponding +to the CPU on which the outgoing context switch executed. As these tasks +later exit their RCU read-side critical sections, they remove themselves +from the list. This list is therefore in reverse time order, so that if +one of the tasks is blocking the current grace period, all subsequent +tasks must also be blocking that same grace period. Therefore, a single +pointer into this list suffices to track all tasks blocking a given +grace period. That pointer is stored in ``->gp_tasks`` for normal grace +periods and in ``->exp_tasks`` for expedited grace periods. These last +two fields are ``NULL`` if either there is no grace period in flight or +if there are no blocked tasks preventing that grace period from +completing. If either of these two pointers is referencing a task that +removes itself from the ``->blkd_tasks`` list, then that task must +advance the pointer to the next task on the list, or set the pointer to +``NULL`` if there are no subsequent tasks on the list. + +For example, suppose that tasks T1, T2, and T3 are all hard-affinitied +to the largest-numbered CPU in the system. Then if task T1 blocked in an +RCU read-side critical section, then an expedited grace period started, +then task T2 blocked in an RCU read-side critical section, then a normal +grace period started, and finally task 3 blocked in an RCU read-side +critical section, then the state of the last leaf ``rcu_node`` +structure's blocked-task list would be as shown below: + +.. kernel-figure:: blkd_task.svg + +Task T1 is blocking both grace periods, task T2 is blocking only the +normal grace period, and task T3 is blocking neither grace period. Note +that these tasks will not remove themselves from this list immediately +upon resuming execution. They will instead remain on the list until they +execute the outermost ``rcu_read_unlock()`` that ends their RCU +read-side critical section. + +The ``->wait_blkd_tasks`` field indicates whether or not the current +grace period is waiting on a blocked task. + +Sizing the ``rcu_node`` Array +''''''''''''''''''''''''''''' + +The ``rcu_node`` array is sized via a series of C-preprocessor +expressions as follows: + +:: + + 1 #ifdef CONFIG_RCU_FANOUT + 2 #define RCU_FANOUT CONFIG_RCU_FANOUT + 3 #else + 4 # ifdef CONFIG_64BIT + 5 # define RCU_FANOUT 64 + 6 # else + 7 # define RCU_FANOUT 32 + 8 # endif + 9 #endif + 10 + 11 #ifdef CONFIG_RCU_FANOUT_LEAF + 12 #define RCU_FANOUT_LEAF CONFIG_RCU_FANOUT_LEAF + 13 #else + 14 # ifdef CONFIG_64BIT + 15 # define RCU_FANOUT_LEAF 64 + 16 # else + 17 # define RCU_FANOUT_LEAF 32 + 18 # endif + 19 #endif + 20 + 21 #define RCU_FANOUT_1 (RCU_FANOUT_LEAF) + 22 #define RCU_FANOUT_2 (RCU_FANOUT_1 * RCU_FANOUT) + 23 #define RCU_FANOUT_3 (RCU_FANOUT_2 * RCU_FANOUT) + 24 #define RCU_FANOUT_4 (RCU_FANOUT_3 * RCU_FANOUT) + 25 + 26 #if NR_CPUS <= RCU_FANOUT_1 + 27 # define RCU_NUM_LVLS 1 + 28 # define NUM_RCU_LVL_0 1 + 29 # define NUM_RCU_NODES NUM_RCU_LVL_0 + 30 # define NUM_RCU_LVL_INIT { NUM_RCU_LVL_0 } + 31 # define RCU_NODE_NAME_INIT { "rcu_node_0" } + 32 # define RCU_FQS_NAME_INIT { "rcu_node_fqs_0" } + 33 # define RCU_EXP_NAME_INIT { "rcu_node_exp_0" } + 34 #elif NR_CPUS <= RCU_FANOUT_2 + 35 # define RCU_NUM_LVLS 2 + 36 # define NUM_RCU_LVL_0 1 + 37 # define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_1) + 38 # define NUM_RCU_NODES (NUM_RCU_LVL_0 + NUM_RCU_LVL_1) + 39 # define NUM_RCU_LVL_INIT { NUM_RCU_LVL_0, NUM_RCU_LVL_1 } + 40 # define RCU_NODE_NAME_INIT { "rcu_node_0", "rcu_node_1" } + 41 # define RCU_FQS_NAME_INIT { "rcu_node_fqs_0", "rcu_node_fqs_1" } + 42 # define RCU_EXP_NAME_INIT { "rcu_node_exp_0", "rcu_node_exp_1" } + 43 #elif NR_CPUS <= RCU_FANOUT_3 + 44 # define RCU_NUM_LVLS 3 + 45 # define NUM_RCU_LVL_0 1 + 46 # define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_2) + 47 # define NUM_RCU_LVL_2 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_1) + 48 # define NUM_RCU_NODES (NUM_RCU_LVL_0 + NUM_RCU_LVL_1 + NUM_RCU_LVL_2) + 49 # define NUM_RCU_LVL_INIT { NUM_RCU_LVL_0, NUM_RCU_LVL_1, NUM_RCU_LVL_2 } + 50 # define RCU_NODE_NAME_INIT { "rcu_node_0", "rcu_node_1", "rcu_node_2" } + 51 # define RCU_FQS_NAME_INIT { "rcu_node_fqs_0", "rcu_node_fqs_1", "rcu_node_fqs_2" } + 52 # define RCU_EXP_NAME_INIT { "rcu_node_exp_0", "rcu_node_exp_1", "rcu_node_exp_2" } + 53 #elif NR_CPUS <= RCU_FANOUT_4 + 54 # define RCU_NUM_LVLS 4 + 55 # define NUM_RCU_LVL_0 1 + 56 # define NUM_RCU_LVL_1 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_3) + 57 # define NUM_RCU_LVL_2 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_2) + 58 # define NUM_RCU_LVL_3 DIV_ROUND_UP(NR_CPUS, RCU_FANOUT_1) + 59 # define NUM_RCU_NODES (NUM_RCU_LVL_0 + NUM_RCU_LVL_1 + NUM_RCU_LVL_2 + NUM_RCU_LVL_3) + 60 # define NUM_RCU_LVL_INIT { NUM_RCU_LVL_0, NUM_RCU_LVL_1, NUM_RCU_LVL_2, NUM_RCU_LVL_3 } + 61 # define RCU_NODE_NAME_INIT { "rcu_node_0", "rcu_node_1", "rcu_node_2", "rcu_node_3" } + 62 # define RCU_FQS_NAME_INIT { "rcu_node_fqs_0", "rcu_node_fqs_1", "rcu_node_fqs_2", "rcu_node_fqs_3" } + 63 # define RCU_EXP_NAME_INIT { "rcu_node_exp_0", "rcu_node_exp_1", "rcu_node_exp_2", "rcu_node_exp_3" } + 64 #else + 65 # error "CONFIG_RCU_FANOUT insufficient for NR_CPUS" + 66 #endif + +The maximum number of levels in the ``rcu_node`` structure is currently +limited to four, as specified by lines 21-24 and the structure of the +subsequent “if” statement. For 32-bit systems, this allows +16*32*32*32=524,288 CPUs, which should be sufficient for the next few +years at least. For 64-bit systems, 16*64*64*64=4,194,304 CPUs is +allowed, which should see us through the next decade or so. This +four-level tree also allows kernels built with ``CONFIG_RCU_FANOUT=8`` +to support up to 4096 CPUs, which might be useful in very large systems +having eight CPUs per socket (but please note that no one has yet shown +any measurable performance degradation due to misaligned socket and +``rcu_node`` boundaries). In addition, building kernels with a full four +levels of ``rcu_node`` tree permits better testing of RCU's +combining-tree code. + +The ``RCU_FANOUT`` symbol controls how many children are permitted at +each non-leaf level of the ``rcu_node`` tree. If the +``CONFIG_RCU_FANOUT`` Kconfig option is not specified, it is set based +on the word size of the system, which is also the Kconfig default. + +The ``RCU_FANOUT_LEAF`` symbol controls how many CPUs are handled by +each leaf ``rcu_node`` structure. Experience has shown that allowing a +given leaf ``rcu_node`` structure to handle 64 CPUs, as permitted by the +number of bits in the ``->qsmask`` field on a 64-bit system, results in +excessive contention for the leaf ``rcu_node`` structures' ``->lock`` +fields. The number of CPUs per leaf ``rcu_node`` structure is therefore +limited to 16 given the default value of ``CONFIG_RCU_FANOUT_LEAF``. If +``CONFIG_RCU_FANOUT_LEAF`` is unspecified, the value selected is based +on the word size of the system, just as for ``CONFIG_RCU_FANOUT``. +Lines 11-19 perform this computation. + +Lines 21-24 compute the maximum number of CPUs supported by a +single-level (which contains a single ``rcu_node`` structure), +two-level, three-level, and four-level ``rcu_node`` tree, respectively, +given the fanout specified by ``RCU_FANOUT`` and ``RCU_FANOUT_LEAF``. +These numbers of CPUs are retained in the ``RCU_FANOUT_1``, +``RCU_FANOUT_2``, ``RCU_FANOUT_3``, and ``RCU_FANOUT_4`` C-preprocessor +variables, respectively. + +These variables are used to control the C-preprocessor ``#if`` statement +spanning lines 26-66 that computes the number of ``rcu_node`` structures +required for each level of the tree, as well as the number of levels +required. The number of levels is placed in the ``NUM_RCU_LVLS`` +C-preprocessor variable by lines 27, 35, 44, and 54. The number of +``rcu_node`` structures for the topmost level of the tree is always +exactly one, and this value is unconditionally placed into +``NUM_RCU_LVL_0`` by lines 28, 36, 45, and 55. The rest of the levels +(if any) of the ``rcu_node`` tree are computed by dividing the maximum +number of CPUs by the fanout supported by the number of levels from the +current level down, rounding up. This computation is performed by +lines 37, 46-47, and 56-58. Lines 31-33, 40-42, 50-52, and 62-63 create +initializers for lockdep lock-class names. Finally, lines 64-66 produce +an error if the maximum number of CPUs is too large for the specified +fanout. + +The ``rcu_segcblist`` Structure +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The ``rcu_segcblist`` structure maintains a segmented list of callbacks +as follows: + +:: + + 1 #define RCU_DONE_TAIL 0 + 2 #define RCU_WAIT_TAIL 1 + 3 #define RCU_NEXT_READY_TAIL 2 + 4 #define RCU_NEXT_TAIL 3 + 5 #define RCU_CBLIST_NSEGS 4 + 6 + 7 struct rcu_segcblist { + 8 struct rcu_head *head; + 9 struct rcu_head **tails[RCU_CBLIST_NSEGS]; + 10 unsigned long gp_seq[RCU_CBLIST_NSEGS]; + 11 long len; + 12 long len_lazy; + 13 }; + +The segments are as follows: + +#. ``RCU_DONE_TAIL``: Callbacks whose grace periods have elapsed. These + callbacks are ready to be invoked. +#. ``RCU_WAIT_TAIL``: Callbacks that are waiting for the current grace + period. Note that different CPUs can have different ideas about which + grace period is current, hence the ``->gp_seq`` field. +#. ``RCU_NEXT_READY_TAIL``: Callbacks waiting for the next grace period + to start. +#. ``RCU_NEXT_TAIL``: Callbacks that have not yet been associated with a + grace period. + +The ``->head`` pointer references the first callback or is ``NULL`` if +the list contains no callbacks (which is *not* the same as being empty). +Each element of the ``->tails[]`` array references the ``->next`` +pointer of the last callback in the corresponding segment of the list, +or the list's ``->head`` pointer if that segment and all previous +segments are empty. If the corresponding segment is empty but some +previous segment is not empty, then the array element is identical to +its predecessor. Older callbacks are closer to the head of the list, and +new callbacks are added at the tail. This relationship between the +``->head`` pointer, the ``->tails[]`` array, and the callbacks is shown +in this diagram: + +.. kernel-figure:: nxtlist.svg + +In this figure, the ``->head`` pointer references the first RCU callback +in the list. The ``->tails[RCU_DONE_TAIL]`` array element references the +``->head`` pointer itself, indicating that none of the callbacks is +ready to invoke. The ``->tails[RCU_WAIT_TAIL]`` array element references +callback CB 2's ``->next`` pointer, which indicates that CB 1 and CB 2 +are both waiting on the current grace period, give or take possible +disagreements about exactly which grace period is the current one. The +``->tails[RCU_NEXT_READY_TAIL]`` array element references the same RCU +callback that ``->tails[RCU_WAIT_TAIL]`` does, which indicates that +there are no callbacks waiting on the next RCU grace period. The +``->tails[RCU_NEXT_TAIL]`` array element references CB 4's ``->next`` +pointer, indicating that all the remaining RCU callbacks have not yet +been assigned to an RCU grace period. Note that the +``->tails[RCU_NEXT_TAIL]`` array element always references the last RCU +callback's ``->next`` pointer unless the callback list is empty, in +which case it references the ``->head`` pointer. + +There is one additional important special case for the +``->tails[RCU_NEXT_TAIL]`` array element: It can be ``NULL`` when this +list is *disabled*. Lists are disabled when the corresponding CPU is +offline or when the corresponding CPU's callbacks are offloaded to a +kthread, both of which are described elsewhere. + +CPUs advance their callbacks from the ``RCU_NEXT_TAIL`` to the +``RCU_NEXT_READY_TAIL`` to the ``RCU_WAIT_TAIL`` to the +``RCU_DONE_TAIL`` list segments as grace periods advance. + +The ``->gp_seq[]`` array records grace-period numbers corresponding to +the list segments. This is what allows different CPUs to have different +ideas as to which is the current grace period while still avoiding +premature invocation of their callbacks. In particular, this allows CPUs +that go idle for extended periods to determine which of their callbacks +are ready to be invoked after reawakening. + +The ``->len`` counter contains the number of callbacks in ``->head``, +and the ``->len_lazy`` contains the number of those callbacks that are +known to only free memory, and whose invocation can therefore be safely +deferred. + +.. important:: + + It is the ``->len`` field that determines whether or + not there are callbacks associated with this ``rcu_segcblist`` + structure, *not* the ``->head`` pointer. The reason for this is that all + the ready-to-invoke callbacks (that is, those in the ``RCU_DONE_TAIL`` + segment) are extracted all at once at callback-invocation time + (``rcu_do_batch``), due to which ``->head`` may be set to NULL if there + are no not-done callbacks remaining in the ``rcu_segcblist``. If + callback invocation must be postponed, for example, because a + high-priority process just woke up on this CPU, then the remaining + callbacks are placed back on the ``RCU_DONE_TAIL`` segment and + ``->head`` once again points to the start of the segment. In short, the + head field can briefly be ``NULL`` even though the CPU has callbacks + present the entire time. Therefore, it is not appropriate to test the + ``->head`` pointer for ``NULL``. + +In contrast, the ``->len`` and ``->len_lazy`` counts are adjusted only +after the corresponding callbacks have been invoked. This means that the +``->len`` count is zero only if the ``rcu_segcblist`` structure really +is devoid of callbacks. Of course, off-CPU sampling of the ``->len`` +count requires careful use of appropriate synchronization, for example, +memory barriers. This synchronization can be a bit subtle, particularly +in the case of ``rcu_barrier()``. + +The ``rcu_data`` Structure +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The ``rcu_data`` maintains the per-CPU state for the RCU subsystem. The +fields in this structure may be accessed only from the corresponding CPU +(and from tracing) unless otherwise stated. This structure is the focus +of quiescent-state detection and RCU callback queuing. It also tracks +its relationship to the corresponding leaf ``rcu_node`` structure to +allow more-efficient propagation of quiescent states up the ``rcu_node`` +combining tree. Like the ``rcu_node`` structure, it provides a local +copy of the grace-period information to allow for-free synchronized +access to this information from the corresponding CPU. Finally, this +structure records past dyntick-idle state for the corresponding CPU and +also tracks statistics. + +The ``rcu_data`` structure's fields are discussed, singly and in groups, +in the following sections. + +Connection to Other Data Structures +''''''''''''''''''''''''''''''''''' + +This portion of the ``rcu_data`` structure is declared as follows: + +:: + + 1 int cpu; + 2 struct rcu_node *mynode; + 3 unsigned long grpmask; + 4 bool beenonline; + +The ``->cpu`` field contains the number of the corresponding CPU and the +``->mynode`` field references the corresponding ``rcu_node`` structure. +The ``->mynode`` is used to propagate quiescent states up the combining +tree. These two fields are constant and therefore do not require +synchronization. + +The ``->grpmask`` field indicates the bit in the ``->mynode->qsmask`` +corresponding to this ``rcu_data`` structure, and is also used when +propagating quiescent states. The ``->beenonline`` flag is set whenever +the corresponding CPU comes online, which means that the debugfs tracing +need not dump out any ``rcu_data`` structure for which this flag is not +set. + +Quiescent-State and Grace-Period Tracking +''''''''''''''''''''''''''''''''''''''''' + +This portion of the ``rcu_data`` structure is declared as follows: + +:: + + 1 unsigned long gp_seq; + 2 unsigned long gp_seq_needed; + 3 bool cpu_no_qs; + 4 bool core_needs_qs; + 5 bool gpwrap; + +The ``->gp_seq`` field is the counterpart of the field of the same name +in the ``rcu_state`` and ``rcu_node`` structures. The +``->gp_seq_needed`` field is the counterpart of the field of the same +name in the rcu_node structure. They may each lag up to one behind their +``rcu_node`` counterparts, but in ``CONFIG_NO_HZ_IDLE`` and +``CONFIG_NO_HZ_FULL`` kernels can lag arbitrarily far behind for CPUs in +dyntick-idle mode (but these counters will catch up upon exit from +dyntick-idle mode). If the lower two bits of a given ``rcu_data`` +structure's ``->gp_seq`` are zero, then this ``rcu_data`` structure +believes that RCU is idle. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| All this replication of the grace period numbers can only cause | +| massive confusion. Why not just keep a global sequence number and be | +| done with it??? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Because if there was only a single global sequence numbers, there | +| would need to be a single global lock to allow safely accessing and | +| updating it. And if we are not going to have a single global lock, we | +| need to carefully manage the numbers on a per-node basis. Recall from | +| the answer to a previous Quick Quiz that the consequences of applying | +| a previously sampled quiescent state to the wrong grace period are | +| quite severe. | ++-----------------------------------------------------------------------+ + +The ``->cpu_no_qs`` flag indicates that the CPU has not yet passed +through a quiescent state, while the ``->core_needs_qs`` flag indicates +that the RCU core needs a quiescent state from the corresponding CPU. +The ``->gpwrap`` field indicates that the corresponding CPU has remained +idle for so long that the ``gp_seq`` counter is in danger of overflow, +which will cause the CPU to disregard the values of its counters on its +next exit from idle. + +RCU Callback Handling +''''''''''''''''''''' + +In the absence of CPU-hotplug events, RCU callbacks are invoked by the +same CPU that registered them. This is strictly a cache-locality +optimization: callbacks can and do get invoked on CPUs other than the +one that registered them. After all, if the CPU that registered a given +callback has gone offline before the callback can be invoked, there +really is no other choice. + +This portion of the ``rcu_data`` structure is declared as follows: + +:: + + 1 struct rcu_segcblist cblist; + 2 long qlen_last_fqs_check; + 3 unsigned long n_cbs_invoked; + 4 unsigned long n_nocbs_invoked; + 5 unsigned long n_cbs_orphaned; + 6 unsigned long n_cbs_adopted; + 7 unsigned long n_force_qs_snap; + 8 long blimit; + +The ``->cblist`` structure is the segmented callback list described +earlier. The CPU advances the callbacks in its ``rcu_data`` structure +whenever it notices that another RCU grace period has completed. The CPU +detects the completion of an RCU grace period by noticing that the value +of its ``rcu_data`` structure's ``->gp_seq`` field differs from that of +its leaf ``rcu_node`` structure. Recall that each ``rcu_node`` +structure's ``->gp_seq`` field is updated at the beginnings and ends of +each grace period. + +The ``->qlen_last_fqs_check`` and ``->n_force_qs_snap`` coordinate the +forcing of quiescent states from ``call_rcu()`` and friends when +callback lists grow excessively long. + +The ``->n_cbs_invoked``, ``->n_cbs_orphaned``, and ``->n_cbs_adopted`` +fields count the number of callbacks invoked, sent to other CPUs when +this CPU goes offline, and received from other CPUs when those other +CPUs go offline. The ``->n_nocbs_invoked`` is used when the CPU's +callbacks are offloaded to a kthread. + +Finally, the ``->blimit`` counter is the maximum number of RCU callbacks +that may be invoked at a given time. + +Dyntick-Idle Handling +''''''''''''''''''''' + +This portion of the ``rcu_data`` structure is declared as follows: + +:: + + 1 int dynticks_snap; + 2 unsigned long dynticks_fqs; + +The ``->dynticks_snap`` field is used to take a snapshot of the +corresponding CPU's dyntick-idle state when forcing quiescent states, +and is therefore accessed from other CPUs. Finally, the +``->dynticks_fqs`` field is used to count the number of times this CPU +is determined to be in dyntick-idle state, and is used for tracing and +debugging purposes. + +This portion of the rcu_data structure is declared as follows: + +:: + + 1 long dynticks_nesting; + 2 long dynticks_nmi_nesting; + 3 atomic_t dynticks; + 4 bool rcu_need_heavy_qs; + 5 bool rcu_urgent_qs; + +These fields in the rcu_data structure maintain the per-CPU dyntick-idle +state for the corresponding CPU. The fields may be accessed only from +the corresponding CPU (and from tracing) unless otherwise stated. + +The ``->dynticks_nesting`` field counts the nesting depth of process +execution, so that in normal circumstances this counter has value zero +or one. NMIs, irqs, and tracers are counted by the +``->dynticks_nmi_nesting`` field. Because NMIs cannot be masked, changes +to this variable have to be undertaken carefully using an algorithm +provided by Andy Lutomirski. The initial transition from idle adds one, +and nested transitions add two, so that a nesting level of five is +represented by a ``->dynticks_nmi_nesting`` value of nine. This counter +can therefore be thought of as counting the number of reasons why this +CPU cannot be permitted to enter dyntick-idle mode, aside from +process-level transitions. + +However, it turns out that when running in non-idle kernel context, the +Linux kernel is fully capable of entering interrupt handlers that never +exit and perhaps also vice versa. Therefore, whenever the +``->dynticks_nesting`` field is incremented up from zero, the +``->dynticks_nmi_nesting`` field is set to a large positive number, and +whenever the ``->dynticks_nesting`` field is decremented down to zero, +the ``->dynticks_nmi_nesting`` field is set to zero. Assuming that +the number of misnested interrupts is not sufficient to overflow the +counter, this approach corrects the ``->dynticks_nmi_nesting`` field +every time the corresponding CPU enters the idle loop from process +context. + +The ``->dynticks`` field counts the corresponding CPU's transitions to +and from either dyntick-idle or user mode, so that this counter has an +even value when the CPU is in dyntick-idle mode or user mode and an odd +value otherwise. The transitions to/from user mode need to be counted +for user mode adaptive-ticks support (see Documentation/timers/no_hz.rst). + +The ``->rcu_need_heavy_qs`` field is used to record the fact that the +RCU core code would really like to see a quiescent state from the +corresponding CPU, so much so that it is willing to call for +heavy-weight dyntick-counter operations. This flag is checked by RCU's +context-switch and ``cond_resched()`` code, which provide a momentary +idle sojourn in response. + +Finally, the ``->rcu_urgent_qs`` field is used to record the fact that +the RCU core code would really like to see a quiescent state from the +corresponding CPU, with the various other fields indicating just how +badly RCU wants this quiescent state. This flag is checked by RCU's +context-switch path (``rcu_note_context_switch``) and the cond_resched +code. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why not simply combine the ``->dynticks_nesting`` and | +| ``->dynticks_nmi_nesting`` counters into a single counter that just | +| counts the number of reasons that the corresponding CPU is non-idle? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Because this would fail in the presence of interrupts whose handlers | +| never return and of handlers that manage to return from a made-up | +| interrupt. | ++-----------------------------------------------------------------------+ + +Additional fields are present for some special-purpose builds, and are +discussed separately. + +The ``rcu_head`` Structure +~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Each ``rcu_head`` structure represents an RCU callback. These structures +are normally embedded within RCU-protected data structures whose +algorithms use asynchronous grace periods. In contrast, when using +algorithms that block waiting for RCU grace periods, RCU users need not +provide ``rcu_head`` structures. + +The ``rcu_head`` structure has fields as follows: + +:: + + 1 struct rcu_head *next; + 2 void (*func)(struct rcu_head *head); + +The ``->next`` field is used to link the ``rcu_head`` structures +together in the lists within the ``rcu_data`` structures. The ``->func`` +field is a pointer to the function to be called when the callback is +ready to be invoked, and this function is passed a pointer to the +``rcu_head`` structure. However, ``kfree_rcu()`` uses the ``->func`` +field to record the offset of the ``rcu_head`` structure within the +enclosing RCU-protected data structure. + +Both of these fields are used internally by RCU. From the viewpoint of +RCU users, this structure is an opaque “cookie”. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Given that the callback function ``->func`` is passed a pointer to | +| the ``rcu_head`` structure, how is that function supposed to find the | +| beginning of the enclosing RCU-protected data structure? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| In actual practice, there is a separate callback function per type of | +| RCU-protected data structure. The callback function can therefore use | +| the ``container_of()`` macro in the Linux kernel (or other | +| pointer-manipulation facilities in other software environments) to | +| find the beginning of the enclosing structure. | ++-----------------------------------------------------------------------+ + +RCU-Specific Fields in the ``task_struct`` Structure +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The ``CONFIG_PREEMPT_RCU`` implementation uses some additional fields in +the ``task_struct`` structure: + +:: + + 1 #ifdef CONFIG_PREEMPT_RCU + 2 int rcu_read_lock_nesting; + 3 union rcu_special rcu_read_unlock_special; + 4 struct list_head rcu_node_entry; + 5 struct rcu_node *rcu_blocked_node; + 6 #endif /* #ifdef CONFIG_PREEMPT_RCU */ + 7 #ifdef CONFIG_TASKS_RCU + 8 unsigned long rcu_tasks_nvcsw; + 9 bool rcu_tasks_holdout; + 10 struct list_head rcu_tasks_holdout_list; + 11 int rcu_tasks_idle_cpu; + 12 #endif /* #ifdef CONFIG_TASKS_RCU */ + +The ``->rcu_read_lock_nesting`` field records the nesting level for RCU +read-side critical sections, and the ``->rcu_read_unlock_special`` field +is a bitmask that records special conditions that require +``rcu_read_unlock()`` to do additional work. The ``->rcu_node_entry`` +field is used to form lists of tasks that have blocked within +preemptible-RCU read-side critical sections and the +``->rcu_blocked_node`` field references the ``rcu_node`` structure whose +list this task is a member of, or ``NULL`` if it is not blocked within a +preemptible-RCU read-side critical section. + +The ``->rcu_tasks_nvcsw`` field tracks the number of voluntary context +switches that this task had undergone at the beginning of the current +tasks-RCU grace period, ``->rcu_tasks_holdout`` is set if the current +tasks-RCU grace period is waiting on this task, +``->rcu_tasks_holdout_list`` is a list element enqueuing this task on +the holdout list, and ``->rcu_tasks_idle_cpu`` tracks which CPU this +idle task is running, but only if the task is currently running, that +is, if the CPU is currently idle. + +Accessor Functions +~~~~~~~~~~~~~~~~~~ + +The following listing shows the ``rcu_get_root()``, +``rcu_for_each_node_breadth_first`` and ``rcu_for_each_leaf_node()`` +function and macros: + +:: + + 1 static struct rcu_node *rcu_get_root(struct rcu_state *rsp) + 2 { + 3 return &rsp->node[0]; + 4 } + 5 + 6 #define rcu_for_each_node_breadth_first(rsp, rnp) \ + 7 for ((rnp) = &(rsp)->node[0]; \ + 8 (rnp) < &(rsp)->node[NUM_RCU_NODES]; (rnp)++) + 9 + 10 #define rcu_for_each_leaf_node(rsp, rnp) \ + 11 for ((rnp) = (rsp)->level[NUM_RCU_LVLS - 1]; \ + 12 (rnp) < &(rsp)->node[NUM_RCU_NODES]; (rnp)++) + +The ``rcu_get_root()`` simply returns a pointer to the first element of +the specified ``rcu_state`` structure's ``->node[]`` array, which is the +root ``rcu_node`` structure. + +As noted earlier, the ``rcu_for_each_node_breadth_first()`` macro takes +advantage of the layout of the ``rcu_node`` structures in the +``rcu_state`` structure's ``->node[]`` array, performing a breadth-first +traversal by simply traversing the array in order. Similarly, the +``rcu_for_each_leaf_node()`` macro traverses only the last part of the +array, thus traversing only the leaf ``rcu_node`` structures. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| What does ``rcu_for_each_leaf_node()`` do if the ``rcu_node`` tree | +| contains only a single node? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| In the single-node case, ``rcu_for_each_leaf_node()`` traverses the | +| single node. | ++-----------------------------------------------------------------------+ + +Summary +~~~~~~~ + +So the state of RCU is represented by an ``rcu_state`` structure, which +contains a combining tree of ``rcu_node`` and ``rcu_data`` structures. +Finally, in ``CONFIG_NO_HZ_IDLE`` kernels, each CPU's dyntick-idle state +is tracked by dynticks-related fields in the ``rcu_data`` structure. If +you made it this far, you are well prepared to read the code +walkthroughs in the other articles in this series. + +Acknowledgments +~~~~~~~~~~~~~~~ + +I owe thanks to Cyrill Gorcunov, Mathieu Desnoyers, Dhaval Giani, Paul +Turner, Abhishek Srivastava, Matt Kowalczyk, and Serge Hallyn for +helping me get this document into a more human-readable state. + +Legal Statement +~~~~~~~~~~~~~~~ + +This work represents the view of the author and does not necessarily +represent the view of IBM. + +Linux is a registered trademark of Linus Torvalds. + +Other company, product, and service names may be trademarks or service +marks of others. diff --git a/Documentation/RCU/Design/Data-Structures/HugeTreeClassicRCU.svg b/Documentation/RCU/Design/Data-Structures/HugeTreeClassicRCU.svg new file mode 100644 index 0000000000..2bf12b4682 --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/HugeTreeClassicRCU.svg @@ -0,0 +1,939 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:37:22 2015 --> + +<!-- Magnification: 3.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="15.1in" + height="11.2in" + viewBox="-66 -66 18087 13407" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="HugeTreeClassicRCU.fig"> + <metadata + id="metadata224"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title></dc:title> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs222"> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow1Mend" + style="overflow:visible;"> + <path + id="path3982" + d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z " + style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;" + transform="scale(0.4) rotate(180) translate(10,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1134" + inkscape:window-height="789" + id="namedview220" + showgrid="false" + inkscape:zoom="0.60515873" + inkscape:cx="679.5" + inkscape:cy="504" + inkscape:window-x="786" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="g4" /> + <g + style="stroke-width:.025in; fill:none" + id="g4"> + <!-- Line: box --> + <rect + x="450" + y="0" + width="17100" + height="8325" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffff00; " + id="rect6" /> + <!-- Line: box --> + <rect + x="11025" + y="3600" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect8" /> + <!-- Line: box --> + <rect + x="4275" + y="3600" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect10" /> + <!-- Line: box --> + <rect + x="5400" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect12" /> + <!-- Line: box --> + <rect + x="9900" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect14" /> + <!-- Line: box --> + <rect + x="14400" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect16" /> + <!-- Line: box --> + <rect + x="900" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect18" /> + <!-- Line: box --> + <rect + x="7650" + y="900" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect20" /> + <!-- Line --> + <polyline + points="3150,9225 3150,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline22" /> + <!-- Arrowhead on XXXpoint 3150 9225 - 3150 7560--> + <!-- Circle --> + <circle + cx="8550" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle26" /> + <!-- Circle --> + <circle + cx="9000" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle28" /> + <!-- Circle --> + <circle + cx="9450" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle30" /> + <!-- Line --> + <polyline + points="6750,6300 8250,5010 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline32" /> + <!-- Arrowhead on XXXpoint 6750 6300 - 8391 4890--> + <!-- Line --> + <polyline + points="11250,6300 9747,5010 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline36" /> + <!-- Arrowhead on XXXpoint 11250 6300 - 9606 4890--> + <!-- Circle --> + <circle + cx="13950" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle40" /> + <!-- Circle --> + <circle + cx="13500" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle42" /> + <!-- Circle --> + <circle + cx="13050" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle44" /> + <!-- Circle --> + <circle + cx="9450" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle46" /> + <!-- Circle --> + <circle + cx="9000" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle48" /> + <!-- Circle --> + <circle + cx="8550" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle50" /> + <!-- Circle --> + <circle + cx="4950" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle52" /> + <!-- Circle --> + <circle + cx="4500" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle54" /> + <!-- Circle --> + <circle + cx="4050" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle56" /> + <!-- Circle --> + <circle + cx="1800" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle58" /> + <!-- Circle --> + <circle + cx="2250" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle60" /> + <!-- Circle --> + <circle + cx="2700" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle62" /> + <!-- Circle --> + <circle + cx="15300" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle64" /> + <!-- Circle --> + <circle + cx="15750" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle66" /> + <!-- Circle --> + <circle + cx="16200" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle68" /> + <!-- Circle --> + <circle + cx="10800" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle70" /> + <!-- Circle --> + <circle + cx="11250" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle72" /> + <!-- Circle --> + <circle + cx="11700" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle74" /> + <!-- Circle --> + <circle + cx="6300" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle76" /> + <!-- Circle --> + <circle + cx="6750" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle78" /> + <!-- Circle --> + <circle + cx="7200" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle80" /> + <!-- Line: box --> + <rect + x="0" + y="11475" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect82" /> + <!-- Line: box --> + <rect + x="1800" + y="9225" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect84" /> + <!-- Line: box --> + <rect + x="4500" + y="11475" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect86" /> + <!-- Line: box --> + <rect + x="6300" + y="9270" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect88" /> + <!-- Line: box --> + <rect + x="8955" + y="11475" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect90" /> + <!-- Line: box --> + <rect + x="10755" + y="9270" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect92" /> + <!-- Line: box --> + <rect + x="13455" + y="11475" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect94" /> + <!-- Line: box --> + <rect + x="15255" + y="9270" + width="2700" + height="1800" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect96" /> + <!-- Line --> + <polyline + points="11700,3600 10197,2310 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline98" /> + <!-- Arrowhead on XXXpoint 11700 3600 - 10056 2190--> + <!-- Line --> + <polyline + points="6300,3600 7800,2310 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline102" /> + <!-- Arrowhead on XXXpoint 6300 3600 - 7941 2190--> + <!-- Line --> + <polyline + points="3150,6300 4650,5010 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline106" /> + <!-- Arrowhead on XXXpoint 3150 6300 - 4791 4890--> + <!-- Line --> + <polyline + points="14850,6300 13347,5010 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline110" /> + <!-- Arrowhead on XXXpoint 14850 6300 - 13206 4890--> + <!-- Line --> + <polyline + points="1350,11475 1350,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline114" /> + <!-- Arrowhead on XXXpoint 1350 11475 - 1350 7560--> + <!-- Line --> + <polyline + points="16650,9225 16650,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline118" /> + <!-- Arrowhead on XXXpoint 16650 9225 - 16650 7560--> + <!-- Line --> + <polyline + points="14850,11475 14850,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline122" /> + <!-- Arrowhead on XXXpoint 14850 11475 - 14850 7560--> + <!-- Line --> + <polyline + points="12150,9225 12150,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline126" /> + <!-- Arrowhead on XXXpoint 12150 9225 - 12150 7560--> + <!-- Line --> + <polyline + points="10350,11475 10350,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline130" /> + <!-- Arrowhead on XXXpoint 10350 11475 - 10350 7560--> + <!-- Line --> + <polyline + points="7650,9225 7650,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline134" /> + <!-- Arrowhead on XXXpoint 7650 9225 - 7650 7560--> + <!-- Line --> + <polyline + points="5850,11475 5850,7746 " + style="stroke:#00d1d1;stroke-width:44.99790066;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline138" /> + <!-- Arrowhead on XXXpoint 5850 11475 - 5850 7560--> + <!-- Text --> + <text + xml:space="preserve" + x="12375" + y="4500" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text142">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="12375" + y="4050" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text144">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5625" + y="4050" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text146">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5625" + y="4500" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text148">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="6750" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text150">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="6750" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text152">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="11250" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text154">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="11250" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text156">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="15750" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text158">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="15750" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text160">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="2250" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text162">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="2250" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text164">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="1350" + y="13050" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text166">CPU 0</text> + <!-- Text --> + <text + xml:space="preserve" + x="1350" + y="11925" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text168">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="1350" + y="12375" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text170">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="3150" + y="10800" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text172">CPU 15</text> + <!-- Text --> + <text + xml:space="preserve" + x="3150" + y="9675" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text174">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="3150" + y="10125" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text176">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="5850" + y="11925" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text178">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5850" + y="12375" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text180">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="5850" + y="13050" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text182">CPU 21823</text> + <!-- Text --> + <text + xml:space="preserve" + x="7650" + y="10845" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text184">CPU 21839</text> + <!-- Text --> + <text + xml:space="preserve" + x="7650" + y="10170" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text186">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="7650" + y="9720" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text188">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="10305" + y="11925" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text190">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="10305" + y="12375" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text192">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="10305" + y="13050" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text194">CPU 43679</text> + <!-- Text --> + <text + xml:space="preserve" + x="12105" + y="10845" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text196">CPU 43695</text> + <!-- Text --> + <text + xml:space="preserve" + x="12105" + y="10170" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text198">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="12105" + y="9720" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text200">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="14805" + y="11925" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text202">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="14805" + y="12375" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text204">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="14805" + y="13050" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text206">CPU 65519</text> + <!-- Text --> + <text + xml:space="preserve" + x="16605" + y="10845" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text208">CPU 65535</text> + <!-- Text --> + <text + xml:space="preserve" + x="16605" + y="10170" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text210">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="16605" + y="9720" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text212">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="675" + y="450" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="start" + id="text214">struct rcu_state</text> + <!-- Text --> + <text + xml:space="preserve" + x="9000" + y="1350" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text216">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="9000" + y="1800" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text218">rcu_node</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Data-Structures/TreeLevel.svg b/Documentation/RCU/Design/Data-Structures/TreeLevel.svg new file mode 100644 index 0000000000..7a7eb3bac9 --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/TreeLevel.svg @@ -0,0 +1,828 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:41:29 2015 --> + +<!-- Magnification: 3.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="17.7in" + height="10.4in" + viewBox="-66 -66 21237 12507" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeLevel.fig"> + <metadata + id="metadata216"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title></dc:title> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs214"> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow1Mend" + style="overflow:visible;"> + <path + id="path3974" + d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z " + style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;" + transform="scale(0.4) rotate(180) translate(10,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1023" + inkscape:window-height="1148" + id="namedview212" + showgrid="false" + inkscape:zoom="0.55869424" + inkscape:cx="796.50006" + inkscape:cy="467.99997" + inkscape:window-x="897" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="g4" /> + <g + style="stroke-width:.025in; fill:none" + id="g4"> + <!-- Line: box --> + <rect + x="0" + y="0" + width="20655" + height="8325" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffff00; " + id="rect6" /> + <!-- Line: box --> + <rect + x="14130" + y="3600" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect8" /> + <!-- Line: box --> + <rect + x="7380" + y="3600" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect10" /> + <!-- Line: box --> + <rect + x="8505" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect12" /> + <!-- Line: box --> + <rect + x="13005" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect14" /> + <!-- Line: box --> + <rect + x="17505" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect16" /> + <!-- Line: box --> + <rect + x="4005" + y="6300" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect18" /> + <!-- Line: box --> + <rect + x="10755" + y="900" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect20" /> + <!-- Line --> + <polyline + points="6255,9225 6255,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline22" /> + <!-- Arrowhead on XXXpoint 6255 9225 - 6255 7560--> + <!-- Circle --> + <circle + cx="11655" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle26" /> + <!-- Circle --> + <circle + cx="12105" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle28" /> + <!-- Circle --> + <circle + cx="12555" + cy="4275" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle30" /> + <!-- Line --> + <polyline + points="9855,6300 11355,5010 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline32" /> + <!-- Arrowhead on XXXpoint 9855 6300 - 11496 4890--> + <!-- Line --> + <polyline + points="14355,6300 12852,5010 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline36" /> + <!-- Arrowhead on XXXpoint 14355 6300 - 12711 4890--> + <!-- Circle --> + <circle + cx="17055" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle40" /> + <!-- Circle --> + <circle + cx="16605" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle42" /> + <!-- Circle --> + <circle + cx="16155" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle44" /> + <!-- Circle --> + <circle + cx="12555" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle46" /> + <!-- Circle --> + <circle + cx="12105" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle48" /> + <!-- Circle --> + <circle + cx="11655" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle50" /> + <!-- Circle --> + <circle + cx="8055" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle52" /> + <!-- Circle --> + <circle + cx="7605" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle54" /> + <!-- Circle --> + <circle + cx="7155" + cy="6975" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle56" /> + <!-- Circle --> + <circle + cx="4905" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle58" /> + <!-- Circle --> + <circle + cx="5355" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle60" /> + <!-- Circle --> + <circle + cx="5805" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle62" /> + <!-- Circle --> + <circle + cx="18405" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle64" /> + <!-- Circle --> + <circle + cx="18855" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle66" /> + <!-- Circle --> + <circle + cx="19305" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle68" /> + <!-- Circle --> + <circle + cx="13905" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle70" /> + <!-- Circle --> + <circle + cx="14355" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle72" /> + <!-- Circle --> + <circle + cx="14805" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle74" /> + <!-- Circle --> + <circle + cx="9405" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle76" /> + <!-- Circle --> + <circle + cx="9855" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle78" /> + <!-- Circle --> + <circle + cx="10305" + cy="8775" + r="114" + style="fill:#000000;stroke:#000000;stroke-width:21;" + id="circle80" /> + <!-- Line: box --> + <rect + x="225" + y="1125" + width="3150" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:21; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffffff; " + id="rect82" /> + <!-- Line: box --> + <rect + x="225" + y="2250" + width="3150" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:21; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffffff; " + id="rect84" /> + <!-- Line: box --> + <rect + x="225" + y="3375" + width="3150" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:21; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffffff; " + id="rect86" /> + <!-- Line --> + <polyline + points="14805,3600 13302,2310 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline88" /> + <!-- Arrowhead on XXXpoint 14805 3600 - 13161 2190--> + <!-- Line --> + <polyline + points="9405,3600 10905,2310 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline92" /> + <!-- Arrowhead on XXXpoint 9405 3600 - 11046 2190--> + <!-- Line --> + <polyline + points="6255,6300 7755,5010 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline96" /> + <!-- Arrowhead on XXXpoint 6255 6300 - 7896 4890--> + <!-- Line --> + <polyline + points="17955,6300 16452,5010 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline100" /> + <!-- Arrowhead on XXXpoint 17955 6300 - 16311 4890--> + <!-- Line --> + <polyline + points="4455,11025 4455,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline104" /> + <!-- Arrowhead on XXXpoint 4455 11025 - 4455 7560--> + <!-- Line --> + <polyline + points="19755,9225 19755,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline108" /> + <!-- Arrowhead on XXXpoint 19755 9225 - 19755 7560--> + <!-- Line --> + <polyline + points="17955,11025 17955,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline112" /> + <!-- Arrowhead on XXXpoint 17955 11025 - 17955 7560--> + <!-- Line --> + <polyline + points="15255,9225 15255,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline116" /> + <!-- Arrowhead on XXXpoint 15255 9225 - 15255 7560--> + <!-- Line --> + <polyline + points="13455,11025 13455,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline120" /> + <!-- Arrowhead on XXXpoint 13455 11025 - 13455 7560--> + <!-- Line --> + <polyline + points="10755,9225 10755,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline124" /> + <!-- Arrowhead on XXXpoint 10755 9225 - 10755 7560--> + <!-- Line --> + <polyline + points="8955,11025 8955,7746 " + style="stroke:#00d1d1;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline128" /> + <!-- Arrowhead on XXXpoint 8955 11025 - 8955 7560--> + <!-- Line: box --> + <rect + x="12105" + y="11025" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect132" /> + <!-- Line: box --> + <rect + x="13905" + y="9225" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect134" /> + <!-- Line: box --> + <rect + x="16605" + y="11025" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect136" /> + <!-- Line: box --> + <rect + x="18405" + y="9225" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect138" /> + <!-- Line: box --> + <rect + x="9405" + y="9225" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect140" /> + <!-- Line: box --> + <rect + x="7605" + y="11025" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect142" /> + <!-- Line: box --> + <rect + x="4905" + y="9225" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect144" /> + <!-- Line: box --> + <rect + x="3105" + y="11025" + width="2700" + height="1350" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect146" /> + <!-- Line --> + <polyline + points="3375,1575 10701,1575 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline148" /> + <!-- Arrowhead on XXXpoint 3375 1575 - 10890 1575--> + <!-- Line --> + <polyline + points="3375,3825 4050,3825 4050,5400 2700,5400 2700,6975 3951,6975 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline152" /> + <!-- Arrowhead on XXXpoint 2700 6975 - 4140 6975--> + <!-- Line --> + <polyline + points="3375,2700 5175,2700 5175,4275 7326,4275 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline156" /> + <!-- Arrowhead on XXXpoint 5175 4275 - 7515 4275--> + <!-- Text --> + <text + xml:space="preserve" + x="15480" + y="4500" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text160">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="15480" + y="4050" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text162">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="8730" + y="4050" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text164">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="8730" + y="4500" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text166">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="9855" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text168">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="9855" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text170">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="14355" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text172">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="14355" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text174">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="18855" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text176">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="18855" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text178">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5355" + y="6750" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text180">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5355" + y="7200" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text182">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="450" + y="1800" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="324" + text-anchor="start" + id="text184">->level[0]</text> + <!-- Text --> + <text + xml:space="preserve" + x="450" + y="2925" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="324" + text-anchor="start" + id="text186">->level[1]</text> + <!-- Text --> + <text + xml:space="preserve" + x="450" + y="4050" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="324" + text-anchor="start" + id="text188">->level[2]</text> + <!-- Text --> + <text + xml:space="preserve" + x="12105" + y="1350" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text190">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="12105" + y="1800" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="middle" + id="text192">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="6255" + y="10125" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text194">CPU 15</text> + <!-- Text --> + <text + xml:space="preserve" + x="4455" + y="11925" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text196">CPU 0</text> + <!-- Text --> + <text + xml:space="preserve" + x="19755" + y="10125" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text198">CPU 65535</text> + <!-- Text --> + <text + xml:space="preserve" + x="17955" + y="11925" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text200">CPU 65519</text> + <!-- Text --> + <text + xml:space="preserve" + x="15255" + y="10125" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text202">CPU 43695</text> + <!-- Text --> + <text + xml:space="preserve" + x="13455" + y="11925" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text204">CPU 43679</text> + <!-- Text --> + <text + xml:space="preserve" + x="10755" + y="10125" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text206">CPU 21839</text> + <!-- Text --> + <text + xml:space="preserve" + x="8955" + y="11925" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text208">CPU 21823</text> + <!-- Text --> + <text + xml:space="preserve" + x="225" + y="450" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="bold" + font-size="288" + text-anchor="start" + id="text210">struct rcu_state</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Data-Structures/TreeMapping.svg b/Documentation/RCU/Design/Data-Structures/TreeMapping.svg new file mode 100644 index 0000000000..729cfa9e6c --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/TreeMapping.svg @@ -0,0 +1,305 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:43:22 2015 --> + +<!-- Magnification: 1.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="3.1in" + height="0.9in" + viewBox="-12 -12 3699 1074" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeMapping.fig"> + <metadata + id="metadata66"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title></dc:title> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs64"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow2Lend" + style="overflow:visible;"> + <path + id="path3836" + style="fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;" + d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z " + transform="scale(1.1) rotate(180) translate(1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow2Mend" + style="overflow:visible;"> + <path + id="path3842" + style="fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;" + d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z " + transform="scale(0.6) rotate(180) translate(0,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow1Mend" + style="overflow:visible;"> + <path + id="path3824" + d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z " + style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;" + transform="scale(0.4) rotate(180) translate(10,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="991" + inkscape:window-height="606" + id="namedview62" + showgrid="false" + inkscape:zoom="3.0752688" + inkscape:cx="139.5" + inkscape:cy="40.5" + inkscape:window-x="891" + inkscape:window-y="177" + inkscape:window-maximized="0" + inkscape:current-layer="g4" /> + <g + style="stroke-width:.025in; fill:none" + id="g4"> + <!-- Line: box --> + <rect + x="0" + y="0" + width="3675" + height="1050" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffff00; " + id="rect6" /> + <!-- Line: box --> + <rect + x="75" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect8" /> + <!-- Line: box --> + <rect + x="600" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect10" /> + <!-- Line: box --> + <rect + x="1125" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect12" /> + <!-- Line: box --> + <rect + x="1650" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect14" /> + <!-- Line: box --> + <rect + x="2175" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect16" /> + <!-- Line: box --> + <rect + x="3225" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect18" /> + <!-- Line --> + <polyline + points="675,375 675,150 300,150 300,358 " + style="stroke:#000000;stroke-width:7.00088889;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline20" /> + <!-- Arrowhead on XXXpoint 300 150 - 300 390--> + <!-- Line --> + <polyline + points="1200,675 1200,900 300,900 300,691 " + style="stroke:#000000;stroke-width:7.00088889;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline24" /> + <!-- Arrowhead on XXXpoint 300 900 - 300 660--> + <!-- Line --> + <polyline + points="1725,375 1725,150 900,150 900,358 " + style="stroke:#000000;stroke-width:7.00088889;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline28" /> + <!-- Arrowhead on XXXpoint 900 150 - 900 390--> + <!-- Line --> + <polyline + points="2250,375 2250,75 825,75 825,358 " + style="stroke:#000000;stroke-width:7.00088889;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline32" /> + <!-- Arrowhead on XXXpoint 825 75 - 825 390--> + <!-- Line --> + <polyline + points="2775,675 2775,900 1425,900 1425,691 " + style="stroke:#000000;stroke-width:7.00088889;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline36" /> + <!-- Arrowhead on XXXpoint 1425 900 - 1425 660--> + <!-- Line --> + <polyline + points="3300,675 3300,975 1350,975 1350,691 " + style="stroke:#000000;stroke-width:7.00088889;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline40" /> + <!-- Arrowhead on XXXpoint 1350 975 - 1350 660--> + <!-- Line: box --> + <rect + x="2700" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect44" /> + <!-- Text --> + <text + xml:space="preserve" + x="300" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text46">0:7 </text> + <!-- Text --> + <text + xml:space="preserve" + x="1350" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text48">4:7 </text> + <!-- Text --> + <text + xml:space="preserve" + x="1875" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text50">0:1 </text> + <!-- Text --> + <text + xml:space="preserve" + x="2400" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text52">2:3 </text> + <!-- Text --> + <text + xml:space="preserve" + x="2925" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text54">4:5 </text> + <!-- Text --> + <text + xml:space="preserve" + x="3450" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text56">6:7 </text> + <!-- Text --> + <text + xml:space="preserve" + x="825" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text58">0:3 </text> + <!-- Text --> + <text + xml:space="preserve" + x="3600" + y="150" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="end" + id="text60">struct rcu_state</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Data-Structures/TreeMappingLevel.svg b/Documentation/RCU/Design/Data-Structures/TreeMappingLevel.svg new file mode 100644 index 0000000000..5b416a4b84 --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/TreeMappingLevel.svg @@ -0,0 +1,380 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:45:19 2015 --> + +<!-- Magnification: 1.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="3.1in" + height="1.8in" + viewBox="-12 -12 3699 2124" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeMappingLevel.svg"> + <metadata + id="metadata98"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs96"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow2Lend" + style="overflow:visible;"> + <path + id="path3868" + style="fill-rule:evenodd;stroke-width:0.62500000;stroke-linejoin:round;" + d="M 8.7185878,4.0337352 L -2.2072895,0.016013256 L 8.7185884,-4.0017078 C 6.9730900,-1.6296469 6.9831476,1.6157441 8.7185878,4.0337352 z " + transform="scale(1.1) rotate(180) translate(1,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1598" + inkscape:window-height="1211" + id="namedview94" + showgrid="false" + inkscape:zoom="5.2508961" + inkscape:cx="139.5" + inkscape:cy="81" + inkscape:window-x="840" + inkscape:window-y="122" + inkscape:window-maximized="0" + inkscape:current-layer="g4" /> + <g + style="stroke-width:.025in; fill:none" + id="g4"> + <!-- Line: box --> + <rect + x="0" + y="0" + width="3675" + height="2100" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffff00; " + id="rect6" /> + <!-- Line: box --> + <rect + x="75" + y="1350" + width="750" + height="225" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect8" /> + <!-- Line: box --> + <rect + x="75" + y="1575" + width="750" + height="225" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect10" /> + <!-- Line: box --> + <rect + x="75" + y="1800" + width="750" + height="225" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect12" /> + <!-- Arc --> + <path + style="stroke:#000000;stroke-width:7;stroke-linecap:butt;" + d="M 1800,900 A 118 118 0 0 0 1800 1125 " + id="path14" /> + <!-- Arc --> + <path + style="stroke:#000000;stroke-width:7;stroke-linecap:butt;" + d="M 750,900 A 75 75 0 0 0 750 1050 " + id="path16" /> + <!-- Line --> + <polyline + points="750,900 750,691 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline18" /> + <!-- Arrowhead on XXXpoint 750 900 - 750 660--> + <!-- Line: box --> + <rect + x="75" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect22" /> + <!-- Line: box --> + <rect + x="600" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect24" /> + <!-- Line: box --> + <rect + x="1650" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect26" /> + <!-- Line: box --> + <rect + x="2175" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect28" /> + <!-- Line: box --> + <rect + x="3225" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect30" /> + <!-- Line --> + <polyline + points="675,375 675,150 300,150 300,358 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline32" /> + <!-- Arrowhead on XXXpoint 300 150 - 300 390--> + <!-- Line --> + <polyline + points="1725,375 1725,150 900,150 900,358 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline36" /> + <!-- Arrowhead on XXXpoint 900 150 - 900 390--> + <!-- Line --> + <polyline + points="2250,375 2250,75 825,75 825,358 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline40" /> + <!-- Arrowhead on XXXpoint 825 75 - 825 390--> + <!-- Line --> + <polyline + points="2775,675 2775,975 1425,975 1425,691 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline44" /> + <!-- Arrowhead on XXXpoint 1425 975 - 1425 660--> + <!-- Line: box --> + <rect + x="2700" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect48" /> + <!-- Line: box --> + <rect + x="1125" + y="375" + width="375" + height="300" + rx="0" + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; fill:#ffbfbf; " + id="rect50" /> + <!-- Line --> + <polyline + points="3300,675 3300,1050 1350,1050 1350,691 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline52" /> + <!-- Arrowhead on XXXpoint 1350 1050 - 1350 660--> + <!-- Line --> + <polyline + points="825,1425 975,1425 975,1200 225,1200 225,691 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline56" /> + <!-- Arrowhead on XXXpoint 225 1200 - 225 660--> + <!-- Line --> + <polyline + points="1200,675 1200,975 300,975 300,691 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline60" /> + <!-- Arrowhead on XXXpoint 300 975 - 300 660--> + <!-- Text --> + <text + xml:space="preserve" + x="150" + y="1500" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="108" + text-anchor="start" + id="text64">->level[0]</text> + <!-- Text --> + <text + xml:space="preserve" + x="150" + y="1725" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="108" + text-anchor="start" + id="text66">->level[1]</text> + <!-- Text --> + <text + xml:space="preserve" + x="150" + y="1950" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="108" + text-anchor="start" + id="text68">->level[2]</text> + <!-- Text --> + <text + xml:space="preserve" + x="300" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text70">0:7 </text> + <!-- Text --> + <text + xml:space="preserve" + x="1350" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text72">4:7 </text> + <!-- Text --> + <text + xml:space="preserve" + x="1875" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text74">0:1 </text> + <!-- Text --> + <text + xml:space="preserve" + x="2400" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text76">2:3 </text> + <!-- Text --> + <text + xml:space="preserve" + x="2925" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text78">4:5 </text> + <!-- Text --> + <text + xml:space="preserve" + x="3450" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text80">6:7 </text> + <!-- Text --> + <text + xml:space="preserve" + x="825" + y="525" + fill="#000000" + font-family="Times" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="middle" + id="text82">0:3 </text> + <!-- Text --> + <text + xml:space="preserve" + x="3600" + y="150" + fill="#000000" + font-family="Courier" + font-style="normal" + font-weight="normal" + font-size="96" + text-anchor="end" + id="text84">struct rcu_state</text> + <!-- Line --> + <polyline + points="825,1875 1800,1875 1800,1125 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:none" + id="polyline86" /> + <!-- Line --> + <polyline + points="1800,900 1800,691 " + style="stroke:#000000;stroke-width:7.00025806;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + id="polyline88" /> + <!-- Arrowhead on XXXpoint 1800 900 - 1800 660--> + <!-- Line --> + <polyline + points="825,1650 1200,1650 1200,1125 750,1125 750,1050 " + style="stroke:#000000;stroke-width:7; stroke-linejoin:miter; stroke-linecap:butt; " + id="polyline92" /> + </g> +</svg> diff --git a/Documentation/RCU/Design/Data-Structures/blkd_task.svg b/Documentation/RCU/Design/Data-Structures/blkd_task.svg new file mode 100644 index 0000000000..bed13e9eca --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/blkd_task.svg @@ -0,0 +1,631 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="10.1in" + height="6.5999999in" + viewBox="-44 -44 12088 7895.4414" + id="svg2" + version="1.1" + inkscape:version="0.92.2pre0 (973e216, 2017-07-25)" + sodipodi:docname="blkd_task.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title></dc:title> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 Z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1.00000003pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1920" + inkscape:window-height="1019" + id="namedview208" + showgrid="false" + inkscape:zoom="1.0495049" + inkscape:cx="456.40569" + inkscape:cy="348.88682" + inkscape:window-x="0" + inkscape:window-y="0" + inkscape:window-maximized="1" + inkscape:current-layer="g4" + showguides="false" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(0,-2393.6637)"> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5710 5790--> + <polyline + points="5714 6068 5704 5822 5598 6044 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline14" + transform="translate(23.757862,2185.7233)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4512 7140--> + <polyline + points="4514 7418 4506 7172 4396 7394 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline18" + transform="translate(23.757862,2185.7233)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1040 9300 - 1502 7140--> + <polyline + points="1504 7418 1496 7172 1386 7394 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline22" + transform="translate(23.757862,2185.7233)" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2240 8100 - 2702 5940--> + <polyline + points="2704 6218 2696 5972 2586 6194 " + style="stroke:#00ff00;stroke-width:14;stroke-miterlimit:8" + id="polyline26" + transform="translate(23.757862,2185.7233)" /> + <!-- Line: box --> + <rect + x="23.757858" + y="2635.7231" + width="6300" + height="7350" + rx="0" + style="fill:#ffffff;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect28" /> + <!-- Line: box --> + <rect + x="323.75787" + y="3235.7231" + width="5700" + height="3750" + rx="0" + style="fill:#ffff00;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect30" /> + <!-- Line --> + <polyline + points="1350,3450 2350,2590 " + style="stroke:#00d1d1;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline32" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 1350 3450 - 2444 2510--> + <!-- Line --> + <polyline + points="4950,3450 3948,2590 " + style="stroke:#00d1d1;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline36" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 4950 3450 - 3854 2510--> + <!-- Line --> + <polyline + points="4050,6600 4050,4414 " + style="stroke:#00d1d1;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline40" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 4050 6600 - 4050 4290--> + <!-- Line --> + <polyline + points="1050,6600 1050,4414 " + style="stroke:#00d1d1;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline44" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 1050 6600 - 1050 4290--> + <!-- Line --> + <polyline + points="2250,5400 2250,4414 " + style="stroke:#00d1d1;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline48" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 2250 5400 - 2250 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 8100 - 2250 6240--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 9300 - 1050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5250 6240--> + <!-- Circle --> + <circle + cx="2873.7581" + cy="6085.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle68" /> + <!-- Circle --> + <circle + cx="3173.7581" + cy="6085.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle70" /> + <!-- Circle --> + <circle + cx="3473.7581" + cy="6085.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle72" /> + <!-- Circle --> + <circle + cx="1373.7578" + cy="7285.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle74" /> + <!-- Circle --> + <circle + cx="1673.7578" + cy="7285.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle76" /> + <!-- Circle --> + <circle + cx="1973.7578" + cy="7285.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle78" /> + <!-- Circle --> + <circle + cx="4373.7578" + cy="7285.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle80" /> + <!-- Circle --> + <circle + cx="4673.7578" + cy="7285.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle82" /> + <!-- Circle --> + <circle + cx="4973.7578" + cy="7285.7236" + r="76" + style="fill:#000000;stroke:#000000;stroke-width:14" + id="circle84" /> + <!-- Line: box --> + <rect + x="773.75781" + y="5635.7236" + width="1800" + height="900" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect86" /> + <!-- Line: box --> + <rect + x="323.75787" + y="8785.7227" + width="1500" + height="900" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect88" /> + <!-- Line: box --> + <rect + x="4523.7578" + y="7585.7236" + width="1500" + height="900" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect90" /> + <!-- Line: box --> + <rect + x="3323.7581" + y="8785.7227" + width="1500" + height="900" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect92" /> + <!-- Line: box --> + <rect + x="2273.7581" + y="3835.7231" + width="1800" + height="900" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect94" /> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <rect + x="1523.7578" + y="7585.7236" + width="1500" + height="900" + rx="0" + style="fill:#87cfff;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect104" /> + <!-- Line --> + <polygon + points="7350,2850 7350,5100 5550,4350 5550,3450 " + style="fill:#ffbfbf;stroke:#000000;stroke-width:14;stroke-linecap:butt;stroke-linejoin:miter;stroke-dasharray:120, 120" + id="polygon106" + transform="translate(23.757862,2185.7233)" /> + <!-- Line --> + <polyline + points="9300,3150 10734,3150 " + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline108" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 9300 3150 - 10860 3150--> + <!-- Line: box --> + <rect + x="10823.758" + y="5035.7236" + width="1200" + height="750" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112" /> + <!-- Line --> + <polyline + points="11400,3600 11400,4284 " + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline114" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 11400 3600 - 11400 4410--> + <!-- Line: box --> + <rect + x="10823.758" + y="6535.7236" + width="1200" + height="750" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect118" /> + <!-- Line --> + <polyline + points="11400,5100 11400,5784 " + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline120" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 11400 5100 - 11400 5910--> + <!-- Line: box --> + <rect + x="10823.758" + y="8035.7236" + width="1200" + height="750" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect124" /> + <!-- Line --> + <polyline + points="9300,3900 9900,3900 9900,4650 10734,4650 " + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline126" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 9900 4650 - 10860 4650--> + <!-- Line --> + <polyline + points="9300,4650 9600,4650 9600,6150 10734,6150 " + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline130" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 9600 6150 - 10860 6150--> + <!-- Text --> + <!-- Text --> + <text + xml:space="preserve" + x="3173.7581" + y="4135.7231" + font-style="normal" + font-weight="bold" + font-size="192" + id="text136" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="3173.7581" + y="4435.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text138" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="1673.7578" + y="5935.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text140" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="1673.7578" + y="6235.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text142" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="2273.7581" + y="7885.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text144" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="2273.7581" + y="8185.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text146" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="1073.7578" + y="9085.7227" + font-style="normal" + font-weight="bold" + font-size="192" + id="text148" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="1073.7578" + y="9385.7227" + font-style="normal" + font-weight="bold" + font-size="192" + id="text150" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="5273.7578" + y="7885.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text152" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="5273.7578" + y="8185.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text154" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="4073.7578" + y="9085.7227" + font-style="normal" + font-weight="bold" + font-size="192" + id="text156" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="4073.7578" + y="9385.7227" + font-style="normal" + font-weight="bold" + font-size="192" + id="text158" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">rcu_data</text> + <!-- Text --> + <text + xml:space="preserve" + x="473.75784" + y="3535.7231" + font-style="normal" + font-weight="bold" + font-size="192" + id="text160" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:start;fill:#000000">struct rcu_state</text> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <text + xml:space="preserve" + x="6023.7578" + y="2935.7231" + font-style="normal" + font-weight="normal" + font-size="192" + id="text178" + style="font-style:normal;font-weight:normal;font-size:192px;font-family:Helvetica;text-anchor:end;fill:#000000">rcu_state</text> + <!-- Text --> + <text + xml:space="preserve" + x="11423.758" + y="5485.7236" + font-style="normal" + font-weight="normal" + font-size="216" + id="text180" + style="font-style:normal;font-weight:normal;font-size:216px;font-family:Helvetica;text-anchor:middle;fill:#000000">T3</text> + <!-- Text --> + <text + xml:space="preserve" + x="11423.758" + y="6985.7236" + font-style="normal" + font-weight="normal" + font-size="216" + id="text182" + style="font-style:normal;font-weight:normal;font-size:216px;font-family:Helvetica;text-anchor:middle;fill:#000000">T2</text> + <!-- Text --> + <text + xml:space="preserve" + x="11423.758" + y="8485.7227" + font-style="normal" + font-weight="normal" + font-size="216" + id="text184" + style="font-style:normal;font-weight:normal;font-size:216px;font-family:Helvetica;text-anchor:middle;fill:#000000">T1</text> + <!-- Line --> + <polyline + points="5250,5400 5250,4414 " + style="stroke:#00d1d1;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline186" + transform="translate(23.757862,2185.7233)" /> + <!-- Arrowhead on XXXpoint 5250 5400 - 5250 4290--> + <!-- Line: box --> + <rect + x="3773.7581" + y="5635.7236" + width="1800" + height="900" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect190" /> + <!-- Line: box --> + <rect + x="7373.7578" + y="5035.7236" + width="1950" + height="750" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect192" /> + <!-- Line: box --> + <rect + x="7373.7578" + y="5785.7236" + width="1950" + height="750" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect194" /> + <!-- Line: box --> + <rect + x="7373.7578" + y="6535.7236" + width="1950" + height="750" + rx="0" + style="fill:#ffbfbf;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect196" /> + <!-- Text --> + <text + xml:space="preserve" + x="4673.7578" + y="6235.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text198" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">rcu_node</text> + <!-- Text --> + <text + xml:space="preserve" + x="4673.7578" + y="5935.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text200" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:middle;fill:#000000">struct</text> + <!-- Text --> + <text + xml:space="preserve" + x="7523.7578" + y="5485.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:start;fill:#000000">blkd_tasks</text> + <!-- Text --> + <text + xml:space="preserve" + x="7523.7578" + y="6235.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text204" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:start;fill:#000000">gp_tasks</text> + <!-- Text --> + <text + xml:space="preserve" + x="7523.7578" + y="6985.7236" + font-style="normal" + font-weight="bold" + font-size="192" + id="text206" + style="font-style:normal;font-weight:bold;font-size:192px;font-family:Courier;text-anchor:start;fill:#000000">exp_tasks</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Data-Structures/nxtlist.svg b/Documentation/RCU/Design/Data-Structures/nxtlist.svg new file mode 100644 index 0000000000..0223e79c38 --- /dev/null +++ b/Documentation/RCU/Design/Data-Structures/nxtlist.svg @@ -0,0 +1,386 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:39:46 2015 --> + +<!-- Magnification: 3.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="10.4in" + height="10.4in" + viewBox="-66 -66 12507 12507" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="segcblist.svg"> + <metadata + id="metadata94"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs92"> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0.0" + refX="0.0" + id="Arrow1Mend" + style="overflow:visible;"> + <path + id="path3852" + d="M 0.0,0.0 L 5.0,-5.0 L -12.5,0.0 L 5.0,5.0 L 0.0,0.0 z " + style="fill-rule:evenodd;stroke:#000000;stroke-width:1.0pt;" + transform="scale(0.4) rotate(180) translate(10,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="925" + inkscape:window-height="928" + id="namedview90" + showgrid="false" + inkscape:zoom="0.80021373" + inkscape:cx="467.99997" + inkscape:cy="467.99997" + inkscape:window-x="948" + inkscape:window-y="73" + inkscape:window-maximized="0" + inkscape:current-layer="g4" /> + <g + style="stroke-width:.025in; fill:none" + id="g4"> + <!-- Line: box --> + <rect + x="0" + y="0" + width="7875" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#87cfff; " + id="rect6" /> + <!-- Line: box --> + <rect + x="0" + y="1125" + width="7875" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#87cfff; " + id="rect8" /> + <!-- Line: box --> + <rect + x="0" + y="2250" + width="7875" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#87cfff; " + id="rect10" /> + <!-- Line: box --> + <rect + x="0" + y="3375" + width="7875" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#87cfff; " + id="rect12" /> + <!-- Line: box --> + <rect + x="0" + y="4500" + width="7875" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; fill:#87cfff; " + id="rect14" /> + <!-- Line: box --> + <rect + x="10575" + y="0" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect16" /> + <!-- Line: box --> + <rect + x="10575" + y="1125" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect18" /> + <!-- Line --> + <polyline + points="11475,2250 11475,3276 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline20" /> + <!-- Arrowhead on XXXpoint 11475 2250 - 11475 3465--> + <!-- Line: box --> + <rect + x="10575" + y="6750" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect24" /> + <!-- Line: box --> + <rect + x="10575" + y="7875" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect26" /> + <!-- Line: box --> + <rect + x="10575" + y="10125" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect28" /> + <!-- Line: box --> + <rect + x="10575" + y="11250" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect30" /> + <!-- Line: box --> + <rect + x="10575" + y="3375" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect32" /> + <!-- Line --> + <polyline + points="11475,5625 11475,6651 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline34" /> + <!-- Arrowhead on XXXpoint 11475 5625 - 11475 6840--> + <!-- Line --> + <polyline + points="7875,225 10476,225 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline38" /> + <!-- Arrowhead on XXXpoint 7875 225 - 10665 225--> + <!-- Line --> + <polyline + points="7875,1350 9675,1350 9675,675 7971,675 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline42" /> + <!-- Arrowhead on XXXpoint 9675 675 - 7785 675--> + <!-- Line --> + <polyline + points="7875,2475 9675,2475 9675,4725 10476,4725 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline46" /> + <!-- Arrowhead on XXXpoint 9675 4725 - 10665 4725--> + <!-- Line --> + <polyline + points="7875,3600 9225,3600 9225,5175 10476,5175 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline50" /> + <!-- Arrowhead on XXXpoint 9225 5175 - 10665 5175--> + <!-- Line --> + <polyline + points="7875,4725 8775,4725 8775,11475 10476,11475 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline54" /> + <!-- Arrowhead on XXXpoint 8775 11475 - 10665 11475--> + <!-- Line: box --> + <rect + x="10575" + y="4500" + width="1800" + height="1125" + rx="0" + style="stroke:#000000;stroke-width:45; stroke-linejoin:miter; stroke-linecap:butt; " + id="rect58" /> + <!-- Line --> + <polyline + points="11475,9000 11475,10026 " + style="stroke:#000000;stroke-width:45.00382345;stroke-linejoin:miter;stroke-linecap:butt;stroke-miterlimit:4;stroke-dasharray:none;marker-end:url(#Arrow1Mend)" + id="polyline60" /> + <!-- Arrowhead on XXXpoint 11475 9000 - 11475 10215--> + <!-- Text --> + <text + xml:space="preserve" + x="225" + y="675" + font-style="normal" + font-weight="bold" + font-size="324" + id="text64" + style="font-size:324px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->head</text> + <!-- Text --> + <text + xml:space="preserve" + x="225" + y="1800" + font-style="normal" + font-weight="bold" + font-size="324" + id="text66" + style="font-size:324px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->tails[RCU_DONE_TAIL]</text> + <!-- Text --> + <text + xml:space="preserve" + x="225" + y="2925" + font-style="normal" + font-weight="bold" + font-size="324" + id="text68" + style="font-size:324px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->tails[RCU_WAIT_TAIL]</text> + <!-- Text --> + <text + xml:space="preserve" + x="225" + y="4050" + font-style="normal" + font-weight="bold" + font-size="324" + id="text70" + style="font-size:324px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->tails[RCU_NEXT_READY_TAIL]</text> + <!-- Text --> + <text + xml:space="preserve" + x="225" + y="5175" + font-style="normal" + font-weight="bold" + font-size="324" + id="text72" + style="font-size:324px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->tails[RCU_NEXT_TAIL]</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="675" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text74">CB 1</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="1800" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text76">next</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="7425" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text78">CB 3</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="8550" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text80">next</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="10800" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text82">CB 4</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="11925" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text84">next</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="4050" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text86">CB 2</text> + <!-- Text --> + <text + xml:space="preserve" + x="11475" + y="5175" + fill="#000000" + font-family="Helvetica" + font-style="normal" + font-weight="normal" + font-size="324" + text-anchor="middle" + id="text88">next</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg new file mode 100644 index 0000000000..7c6c90bd02 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpRCUFlow.svg @@ -0,0 +1,830 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:39:46 2015 --> + +<!-- Magnification: 3.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="952.6817" + height="1219.6219" + viewBox="-66 -66 12729.905 16296.808" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="ExpRCUFlow.svg"> + <metadata + id="metadata94"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs92"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path4146" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3852" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend-9" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3852-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-6" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-16" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-8" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-160" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-5" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-78" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-66" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-8" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-56" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-19" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-89" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-85" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-3" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-73" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-55" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-88" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-198" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-2" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-22" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker5072" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path5074" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-87" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-63" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-26" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-51" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1090" + inkscape:window-height="1148" + id="namedview90" + showgrid="true" + inkscape:zoom="0.80021373" + inkscape:cx="462.49289" + inkscape:cy="623.19585" + inkscape:window-x="557" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="g4" + inkscape:snap-grids="false" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-bottom="5" + fit-margin-left="5" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(23.312813,523.41305)"> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11475 2250 - 11475 3465--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11475 5625 - 11475 6840--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 7875 225 - 10665 225--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9675 675 - 7785 675--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9675 4725 - 10665 4725--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9225 5175 - 10665 5175--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 8775 11475 - 10665 11475--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11475 9000 - 11475 10215--> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <g + id="g4104" + transform="translate(-1068.9745,0)"> + <rect + transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)" + y="-7383.8755" + x="-6124.8989" + height="1966.2251" + width="1953.6969" + id="rect3032-1-0" + style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + sodipodi:linespacing="125%" + id="text4098" + y="818.40338" + x="8168.2671" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="818.40338" + x="8168.2671" + id="tspan4100" + sodipodi:role="line">Idle or</tspan><tspan + id="tspan4102" + y="1152.4579" + x="8168.2671" + sodipodi:role="line">offline?</tspan></text> + </g> + <g + id="g4114" + transform="translate(0,147.96969)"> + <rect + id="rect6" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1475.6636" + width="4401.7612" + y="0" + x="0" /> + <text + sodipodi:linespacing="125%" + id="text4110" + y="835.11212" + x="2206.4917" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="2206.4917" + id="tspan4112" + sodipodi:role="line">CPU N Start</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="M 4432.5052,897.4924 5684.8749,880.79414" + id="path4119" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="M 8503.0006,874.12161 9755.3703,857.42334" + id="path4119-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="8617.0977" + y="705.50983" + id="text4593" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595" + x="8617.0977" + y="705.50983">Y</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9" + transform="translate(9722.4732,131.27105)"> + <rect + id="rect6-0" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="0" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5" + y="835.11212" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="1460.1007" + id="tspan4112-9" + sodipodi:role="line">Done</tspan></text> + </g> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-5" + transform="translate(0,3705.3456)"> + <rect + id="rect6-1" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1475.6636" + width="4401.7612" + y="0" + x="0" /> + <text + sodipodi:linespacing="125%" + id="text4110-9" + y="835.11212" + x="2206.4917" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="2206.4917" + sodipodi:role="line" + id="tspan4776">Send IPI to CPU N</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="M 7102.5627,2263.5171 4430.8404,3682.8694" + id="path4119-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4104-1" + transform="translate(-1065.3349,6403.5782)"> + <rect + transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)" + y="-7383.8755" + x="-6124.8989" + height="1966.2251" + width="1953.6969" + id="rect3032-1-0-6" + style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + sodipodi:linespacing="125%" + id="text4098-3" + y="482.00006" + x="8168.2671" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + id="tspan4102-8" + y="482.00006" + x="8168.2671" + sodipodi:role="line">In RCU</tspan><tspan + y="816.05457" + x="8168.2671" + sodipodi:role="line" + id="tspan4833">read-side</tspan><tspan + y="1150.109" + x="8168.2671" + sodipodi:role="line" + id="tspan4835">critical</tspan><tspan + y="1484.1636" + x="8168.2671" + sodipodi:role="line" + id="tspan4837">section?</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6463.0864" + y="2285.6765" + id="text4593-0" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595-6" + x="6463.0864" + y="2285.6765">N</tspan></text> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654108, 80.17308215;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 2189.1897,5219.361 16.6983,1252.3697" + id="path4119-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-5-2" + transform="translate(0,6551.5479)"> + <rect + id="rect6-1-7" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1475.6636" + width="4401.7612" + y="0" + x="0" /> + <text + sodipodi:linespacing="125%" + id="text4110-9-5" + y="835.11212" + x="2206.4917" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="2206.4917" + sodipodi:role="line" + id="tspan4776-5">IPI Handler</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="m 4432.5052,7297.9678 1252.3697,-16.6982" + id="path4119-2" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="m 8503.0013,7278.6595 1252.369,-16.6982" + id="path4119-8-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="8617.0977" + y="7110.0186" + id="text4593-4" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595-0" + x="8617.0977" + y="7110.0186">N</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3" + transform="translate(9722.4732,6535.809)"> + <rect + id="rect6-0-7" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7" + y="503.71591" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="503.71591" + x="1460.1007" + id="tspan4112-9-0" + sodipodi:role="line">Report CPU</tspan><tspan + y="837.77039" + x="1460.1007" + sodipodi:role="line" + id="tspan4923">Quiescent</tspan><tspan + y="1171.825" + x="1460.1007" + sodipodi:role="line" + id="tspan4925">State</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654335, 80.17308669;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 7102.5627,8725.7454 16.6983,1252.3697" + id="path4119-0-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6797.0522" + y="9018.6807" + id="text4593-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595-2" + x="6797.0522" + y="9018.6807">Y</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-8" + transform="translate(-80.17308,11381.108)"> + <rect + id="rect6-0-7-5" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-6" + y="841.88086" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="841.88086" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-1">rcu_read_unlock()</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 1362.6256,10071.26 16.6983,1252.369" + id="path4119-0-0-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 1362.6256,12883.919 16.6983,1252.369" + id="path4119-0-0-7-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-8-1" + transform="translate(9722.4732,11389.458)"> + <rect + id="rect6-0-7-5-1" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-6-2" + y="841.88086" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="841.88086" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-1-2">Context Switch</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654789, 80.17309578;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 11165.272,10071.26 16.698,1252.369" + id="path4119-0-0-7-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-9" + transform="translate(-80.17308,14163.046)"> + <rect + id="rect6-0-7-1" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-3" + y="503.71591" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="503.71591" + x="1460.1007" + id="tspan4112-9-0-4" + sodipodi:role="line">Report CPU</tspan><tspan + y="837.77039" + x="1460.1007" + sodipodi:role="line" + id="tspan4923-3">and Task</tspan><tspan + y="1171.825" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-9">Quiescent States</tspan></text> + </g> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-8-1-8" + transform="translate(5663.2978,11389.458)"> + <rect + id="rect6-0-7-5-1-1" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-6-2-4" + y="841.88086" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="841.88086" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-1-2-4">Enqueue Task</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="M 9827.612,12141.988 8575.243,12125.29" + id="path4119-8-7-5" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 7106.0965,12818.962 16.6983,1252.369" + id="path4119-0-0-7-7-5" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-9-2" + transform="translate(5663.2978,14098.088)"> + <rect + id="rect6-0-7-1-8" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-3-4" + y="503.71591" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="503.71591" + x="1460.1007" + sodipodi:role="line" + id="tspan4923-3-2">Report CPU</tspan><tspan + y="837.77039" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-9-9">Quiescent</tspan><tspan + y="1171.825" + x="1460.1007" + sodipodi:role="line" + id="tspan5239">State</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="M 5733.305,14095.542 2761.014,12809.774" + id="path4119-0-0-2" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654107, 80.17308214;stroke-dashoffset:0" + d="m 1353.3524,10079.499 9701.6916,0 100.189,-16.698" + id="path5265" + inkscape:connector-curvature="0" + sodipodi:nodetypes="ccc" /> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg new file mode 100644 index 0000000000..6189ffcc6a --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/ExpSchedFlow.svg @@ -0,0 +1,830 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:39:46 2015 --> + +<!-- Magnification: 3.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="952.6817" + height="1425.6191" + viewBox="-66 -66 12729.905 19049.38" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="ExpSchedFlow.svg"> + <metadata + id="metadata94"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs92"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path4146" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3852" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend-9" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3852-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-6" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-16" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-8" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-160" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-5" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-78" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-66" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-8" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-56" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-19" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-89" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-85" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-3" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-73" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-55" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-88" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-198" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-2" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-22" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker5072" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path5074" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-87" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-63" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-26" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path4146-51" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-58" + style="overflow:visible"> + <path + id="path4146-61" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1090" + inkscape:window-height="1148" + id="namedview90" + showgrid="true" + inkscape:zoom="0.69092787" + inkscape:cx="476.34085" + inkscape:cy="712.80957" + inkscape:window-x="770" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="g4" + inkscape:snap-grids="false" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-bottom="5" + fit-margin-left="5" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(23.312814,523.41265)"> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11475 2250 - 11475 3465--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11475 5625 - 11475 6840--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 7875 225 - 10665 225--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9675 675 - 7785 675--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9675 4725 - 10665 4725--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9225 5175 - 10665 5175--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 8775 11475 - 10665 11475--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11475 9000 - 11475 10215--> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <g + id="g4104" + transform="translate(-1068.9745,0)"> + <rect + transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)" + y="-7383.8755" + x="-6124.8989" + height="1966.2251" + width="1953.6969" + id="rect3032-1-0" + style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + sodipodi:linespacing="125%" + id="text4098" + y="818.40338" + x="8168.2671" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="818.40338" + x="8168.2671" + id="tspan4100" + sodipodi:role="line">Idle or</tspan><tspan + id="tspan4102" + y="1152.4579" + x="8168.2671" + sodipodi:role="line">offline?</tspan></text> + </g> + <g + id="g4114" + transform="translate(0,147.96969)"> + <rect + id="rect6" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1475.6636" + width="4401.7612" + y="0" + x="0" /> + <text + sodipodi:linespacing="125%" + id="text4110" + y="835.11212" + x="2206.4917" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="2206.4917" + id="tspan4112" + sodipodi:role="line">CPU N Start</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="M 4432.5052,897.4924 5684.8749,880.79414" + id="path4119" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="M 8503.0006,874.12161 9755.3703,857.42334" + id="path4119-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="8617.0977" + y="705.50983" + id="text4593" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595" + x="8617.0977" + y="705.50983">Y</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9" + transform="translate(9722.4732,131.27105)"> + <rect + id="rect6-0" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="0" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5" + y="835.11212" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="1460.1007" + id="tspan4112-9" + sodipodi:role="line">Done</tspan></text> + </g> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-5" + transform="translate(0,3705.3456)"> + <rect + id="rect6-1" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1475.6636" + width="4401.7612" + y="0" + x="0" /> + <text + sodipodi:linespacing="125%" + id="text4110-9" + y="835.11212" + x="2206.4917" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="2206.4917" + sodipodi:role="line" + id="tspan4776">Send IPI to CPU N</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="M 7102.5627,2263.5171 4430.8404,3682.8694" + id="path4119-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4104-1" + transform="translate(-1065.3349,6403.5782)"> + <rect + transform="matrix(-0.70710678,0.70710678,-0.70710678,-0.70710678,0,0)" + y="-7383.8755" + x="-6124.8989" + height="1966.2251" + width="1953.6969" + id="rect3032-1-0-6" + style="fill:#96ff96;fill-opacity:1;stroke:#000000;stroke-width:45.00382233;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + sodipodi:linespacing="125%" + id="text4098-3" + y="985.4306" + x="8168.2671" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="985.4306" + x="8168.2671" + sodipodi:role="line" + id="tspan3109">CPU idle?</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6463.0864" + y="2285.6765" + id="text4593-0" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595-6" + x="6463.0864" + y="2285.6765">N</tspan></text> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654108, 80.17308215;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 2189.1897,5219.361 16.6983,1252.3697" + id="path4119-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-5-2" + transform="translate(0,6551.5479)"> + <rect + id="rect6-1-7" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1475.6636" + width="4401.7612" + y="0" + x="0" /> + <text + sodipodi:linespacing="125%" + id="text4110-9-5" + y="835.11212" + x="2206.4917" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="835.11212" + x="2206.4917" + sodipodi:role="line" + id="tspan4776-5">IPI Handler</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="m 4432.5052,7297.9678 1252.3697,-16.6982" + id="path4119-2" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow2Lend)" + d="m 8503.0013,7278.6595 1252.369,-16.6982" + id="path4119-8-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="8617.0977" + y="7110.0186" + id="text4593-4" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595-0" + x="8617.0977" + y="7110.0186">Y</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3" + transform="translate(9722.4732,6535.809)"> + <rect + id="rect6-0-7" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7" + y="503.71591" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="503.71591" + x="1460.1007" + id="tspan4112-9-0" + sodipodi:role="line">Report CPU</tspan><tspan + y="837.77039" + x="1460.1007" + sodipodi:role="line" + id="tspan4923">Quiescent</tspan><tspan + y="1171.825" + x="1460.1007" + sodipodi:role="line" + id="tspan4925">State</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654335, 80.17308669;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 7102.5627,11478.337 16.6983,1252.35" + id="path4119-0-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:267.24362183px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6797.0522" + y="9018.6807" + id="text4593-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4595-2" + x="6797.0522" + y="9018.6807">N</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-8" + transform="translate(-80.17308,14133.68)"> + <rect + id="rect6-0-7-5" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-6" + y="841.88086" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="841.88086" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-1">Context Switch</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654562, 80.17309124;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 1362.6256,12823.832 16.6983,1252.369" + id="path4119-0-0-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 1362.6256,15636.491 16.6983,1252.369" + id="path4119-0-0-7-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-8-1" + transform="translate(9722.4732,14142.03)"> + <rect + id="rect6-0-7-5-1" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-6-2" + y="841.88086" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="841.88086" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-1-2">CPU Offline</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654789, 80.17309578;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 11165.272,12823.832 16.698,1252.369" + id="path4119-0-0-7-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-9" + transform="translate(-80.17308,16915.618)"> + <rect + id="rect6-0-7-1" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-3" + y="505.47754" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="505.47754" + x="1460.1007" + id="tspan4112-9-0-4" + sodipodi:role="line">Report CPU</tspan><tspan + y="839.53204" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-9">Quiescent</tspan><tspan + y="1173.5865" + x="1460.1007" + sodipodi:role="line" + id="tspan3168">State</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 11165.272,15571.534 16.698,1252.369" + id="path4119-0-0-7-7-5" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-9-2" + transform="translate(9722.4732,16850.66)"> + <rect + id="rect6-0-7-1-8" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-3-4" + y="503.71591" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="503.71591" + x="1460.1007" + sodipodi:role="line" + id="tspan4923-3-2">Report CPU</tspan><tspan + y="837.77039" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-9-9">Quiescent</tspan><tspan + y="1171.825" + x="1460.1007" + sodipodi:role="line" + id="tspan5239">State</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:40.08654107, 80.17308214;stroke-dashoffset:0" + d="m 1353.3524,12832.071 9701.6916,0 100.189,-16.698" + id="path5265" + inkscape:connector-curvature="0" + sodipodi:nodetypes="ccc" /> + <path + style="fill:none;stroke:#000000;stroke-width:40.08654022;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;marker-end:url(#Arrow2Lend)" + d="m 7112.6465,8669.1867 16.6983,1252.369" + id="path4119-0-0-7-7-5-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4114-9-3-8-1-8-3" + transform="translate(5663.1399,9972.3627)"> + <rect + id="rect6-0-7-5-1-1-9" + style="fill:#87cfff;stroke:#000000;stroke-width:45.00382233;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none" + rx="0" + height="1425.5687" + width="2748.6331" + y="29.467337" + x="80.17308" /> + <text + sodipodi:linespacing="125%" + id="text4110-5-7-6-2-4-0" + y="670.74316" + x="1460.1007" + style="font-size:267.24359131px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="670.74316" + x="1460.1007" + sodipodi:role="line" + id="tspan4925-1-2-4-5">Request</tspan><tspan + y="1004.7976" + x="1460.1007" + sodipodi:role="line" + id="tspan3100">context switch</tspan></text> + </g> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.rst b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.rst new file mode 100644 index 0000000000..93d899d532 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Expedited-Grace-Periods.rst @@ -0,0 +1,521 @@ +================================================= +A Tour Through TREE_RCU's Expedited Grace Periods +================================================= + +Introduction +============ + +This document describes RCU's expedited grace periods. +Unlike RCU's normal grace periods, which accept long latencies to attain +high efficiency and minimal disturbance, expedited grace periods accept +lower efficiency and significant disturbance to attain shorter latencies. + +There are two flavors of RCU (RCU-preempt and RCU-sched), with an earlier +third RCU-bh flavor having been implemented in terms of the other two. +Each of the two implementations is covered in its own section. + +Expedited Grace Period Design +============================= + +The expedited RCU grace periods cannot be accused of being subtle, +given that they for all intents and purposes hammer every CPU that +has not yet provided a quiescent state for the current expedited +grace period. +The one saving grace is that the hammer has grown a bit smaller +over time: The old call to ``try_stop_cpus()`` has been +replaced with a set of calls to ``smp_call_function_single()``, +each of which results in an IPI to the target CPU. +The corresponding handler function checks the CPU's state, motivating +a faster quiescent state where possible, and triggering a report +of that quiescent state. +As always for RCU, once everything has spent some time in a quiescent +state, the expedited grace period has completed. + +The details of the ``smp_call_function_single()`` handler's +operation depend on the RCU flavor, as described in the following +sections. + +RCU-preempt Expedited Grace Periods +=================================== + +``CONFIG_PREEMPTION=y`` kernels implement RCU-preempt. +The overall flow of the handling of a given CPU by an RCU-preempt +expedited grace period is shown in the following diagram: + +.. kernel-figure:: ExpRCUFlow.svg + +The solid arrows denote direct action, for example, a function call. +The dotted arrows denote indirect action, for example, an IPI +or a state that is reached after some time. + +If a given CPU is offline or idle, ``synchronize_rcu_expedited()`` +will ignore it because idle and offline CPUs are already residing +in quiescent states. +Otherwise, the expedited grace period will use +``smp_call_function_single()`` to send the CPU an IPI, which +is handled by ``rcu_exp_handler()``. + +However, because this is preemptible RCU, ``rcu_exp_handler()`` +can check to see if the CPU is currently running in an RCU read-side +critical section. +If not, the handler can immediately report a quiescent state. +Otherwise, it sets flags so that the outermost ``rcu_read_unlock()`` +invocation will provide the needed quiescent-state report. +This flag-setting avoids the previous forced preemption of all +CPUs that might have RCU read-side critical sections. +In addition, this flag-setting is done so as to avoid increasing +the overhead of the common-case fastpath through the scheduler. + +Again because this is preemptible RCU, an RCU read-side critical section +can be preempted. +When that happens, RCU will enqueue the task, which will the continue to +block the current expedited grace period until it resumes and finds its +outermost ``rcu_read_unlock()``. +The CPU will report a quiescent state just after enqueuing the task because +the CPU is no longer blocking the grace period. +It is instead the preempted task doing the blocking. +The list of blocked tasks is managed by ``rcu_preempt_ctxt_queue()``, +which is called from ``rcu_preempt_note_context_switch()``, which +in turn is called from ``rcu_note_context_switch()``, which in +turn is called from the scheduler. + + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why not just have the expedited grace period check the state of all | +| the CPUs? After all, that would avoid all those real-time-unfriendly | +| IPIs. | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Because we want the RCU read-side critical sections to run fast, | +| which means no memory barriers. Therefore, it is not possible to | +| safely check the state from some other CPU. And even if it was | +| possible to safely check the state, it would still be necessary to | +| IPI the CPU to safely interact with the upcoming | +| ``rcu_read_unlock()`` invocation, which means that the remote state | +| testing would not help the worst-case latency that real-time | +| applications care about. | +| | +| One way to prevent your real-time application from getting hit with | +| these IPIs is to build your kernel with ``CONFIG_NO_HZ_FULL=y``. RCU | +| would then perceive the CPU running your application as being idle, | +| and it would be able to safely detect that state without needing to | +| IPI the CPU. | ++-----------------------------------------------------------------------+ + +Please note that this is just the overall flow: Additional complications +can arise due to races with CPUs going idle or offline, among other +things. + +RCU-sched Expedited Grace Periods +--------------------------------- + +``CONFIG_PREEMPTION=n`` kernels implement RCU-sched. The overall flow of +the handling of a given CPU by an RCU-sched expedited grace period is +shown in the following diagram: + +.. kernel-figure:: ExpSchedFlow.svg + +As with RCU-preempt, RCU-sched's ``synchronize_rcu_expedited()`` ignores +offline and idle CPUs, again because they are in remotely detectable +quiescent states. However, because the ``rcu_read_lock_sched()`` and +``rcu_read_unlock_sched()`` leave no trace of their invocation, in +general it is not possible to tell whether or not the current CPU is in +an RCU read-side critical section. The best that RCU-sched's +``rcu_exp_handler()`` can do is to check for idle, on the off-chance +that the CPU went idle while the IPI was in flight. If the CPU is idle, +then ``rcu_exp_handler()`` reports the quiescent state. + +Otherwise, the handler forces a future context switch by setting the +NEED_RESCHED flag of the current task's thread flag and the CPU preempt +counter. At the time of the context switch, the CPU reports the +quiescent state. Should the CPU go offline first, it will report the +quiescent state at that time. + +Expedited Grace Period and CPU Hotplug +-------------------------------------- + +The expedited nature of expedited grace periods require a much tighter +interaction with CPU hotplug operations than is required for normal +grace periods. In addition, attempting to IPI offline CPUs will result +in splats, but failing to IPI online CPUs can result in too-short grace +periods. Neither option is acceptable in production kernels. + +The interaction between expedited grace periods and CPU hotplug +operations is carried out at several levels: + +#. The number of CPUs that have ever been online is tracked by the + ``rcu_state`` structure's ``->ncpus`` field. The ``rcu_state`` + structure's ``->ncpus_snap`` field tracks the number of CPUs that + have ever been online at the beginning of an RCU expedited grace + period. Note that this number never decreases, at least in the + absence of a time machine. +#. The identities of the CPUs that have ever been online is tracked by + the ``rcu_node`` structure's ``->expmaskinitnext`` field. The + ``rcu_node`` structure's ``->expmaskinit`` field tracks the + identities of the CPUs that were online at least once at the + beginning of the most recent RCU expedited grace period. The + ``rcu_state`` structure's ``->ncpus`` and ``->ncpus_snap`` fields are + used to detect when new CPUs have come online for the first time, + that is, when the ``rcu_node`` structure's ``->expmaskinitnext`` + field has changed since the beginning of the last RCU expedited grace + period, which triggers an update of each ``rcu_node`` structure's + ``->expmaskinit`` field from its ``->expmaskinitnext`` field. +#. Each ``rcu_node`` structure's ``->expmaskinit`` field is used to + initialize that structure's ``->expmask`` at the beginning of each + RCU expedited grace period. This means that only those CPUs that have + been online at least once will be considered for a given grace + period. +#. Any CPU that goes offline will clear its bit in its leaf ``rcu_node`` + structure's ``->qsmaskinitnext`` field, so any CPU with that bit + clear can safely be ignored. However, it is possible for a CPU coming + online or going offline to have this bit set for some time while + ``cpu_online`` returns ``false``. +#. For each non-idle CPU that RCU believes is currently online, the + grace period invokes ``smp_call_function_single()``. If this + succeeds, the CPU was fully online. Failure indicates that the CPU is + in the process of coming online or going offline, in which case it is + necessary to wait for a short time period and try again. The purpose + of this wait (or series of waits, as the case may be) is to permit a + concurrent CPU-hotplug operation to complete. +#. In the case of RCU-sched, one of the last acts of an outgoing CPU is + to invoke ``rcu_report_dead()``, which reports a quiescent state for + that CPU. However, this is likely paranoia-induced redundancy. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why all the dancing around with multiple counters and masks tracking | +| CPUs that were once online? Why not just have a single set of masks | +| tracking the currently online CPUs and be done with it? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Maintaining single set of masks tracking the online CPUs *sounds* | +| easier, at least until you try working out all the race conditions | +| between grace-period initialization and CPU-hotplug operations. For | +| example, suppose initialization is progressing down the tree while a | +| CPU-offline operation is progressing up the tree. This situation can | +| result in bits set at the top of the tree that have no counterparts | +| at the bottom of the tree. Those bits will never be cleared, which | +| will result in grace-period hangs. In short, that way lies madness, | +| to say nothing of a great many bugs, hangs, and deadlocks. | +| In contrast, the current multi-mask multi-counter scheme ensures that | +| grace-period initialization will always see consistent masks up and | +| down the tree, which brings significant simplifications over the | +| single-mask method. | +| | +| This is an instance of `deferring work in order to avoid | +| synchronization <http://www.cs.columbia.edu/~library/TR-repository/re | +| ports/reports-1992/cucs-039-92.ps.gz>`__. | +| Lazily recording CPU-hotplug events at the beginning of the next | +| grace period greatly simplifies maintenance of the CPU-tracking | +| bitmasks in the ``rcu_node`` tree. | ++-----------------------------------------------------------------------+ + +Expedited Grace Period Refinements +---------------------------------- + +Idle-CPU Checks +~~~~~~~~~~~~~~~ + +Each expedited grace period checks for idle CPUs when initially forming +the mask of CPUs to be IPIed and again just before IPIing a CPU (both +checks are carried out by ``sync_rcu_exp_select_cpus()``). If the CPU is +idle at any time between those two times, the CPU will not be IPIed. +Instead, the task pushing the grace period forward will include the idle +CPUs in the mask passed to ``rcu_report_exp_cpu_mult()``. + +For RCU-sched, there is an additional check: If the IPI has interrupted +the idle loop, then ``rcu_exp_handler()`` invokes +``rcu_report_exp_rdp()`` to report the corresponding quiescent state. + +For RCU-preempt, there is no specific check for idle in the IPI handler +(``rcu_exp_handler()``), but because RCU read-side critical sections are +not permitted within the idle loop, if ``rcu_exp_handler()`` sees that +the CPU is within RCU read-side critical section, the CPU cannot +possibly be idle. Otherwise, ``rcu_exp_handler()`` invokes +``rcu_report_exp_rdp()`` to report the corresponding quiescent state, +regardless of whether or not that quiescent state was due to the CPU +being idle. + +In summary, RCU expedited grace periods check for idle when building the +bitmask of CPUs that must be IPIed, just before sending each IPI, and +(either explicitly or implicitly) within the IPI handler. + +Batching via Sequence Counter +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +If each grace-period request was carried out separately, expedited grace +periods would have abysmal scalability and problematic high-load +characteristics. Because each grace-period operation can serve an +unlimited number of updates, it is important to *batch* requests, so +that a single expedited grace-period operation will cover all requests +in the corresponding batch. + +This batching is controlled by a sequence counter named +``->expedited_sequence`` in the ``rcu_state`` structure. This counter +has an odd value when there is an expedited grace period in progress and +an even value otherwise, so that dividing the counter value by two gives +the number of completed grace periods. During any given update request, +the counter must transition from even to odd and then back to even, thus +indicating that a grace period has elapsed. Therefore, if the initial +value of the counter is ``s``, the updater must wait until the counter +reaches at least the value ``(s+3)&~0x1``. This counter is managed by +the following access functions: + +#. ``rcu_exp_gp_seq_start()``, which marks the start of an expedited + grace period. +#. ``rcu_exp_gp_seq_end()``, which marks the end of an expedited grace + period. +#. ``rcu_exp_gp_seq_snap()``, which obtains a snapshot of the counter. +#. ``rcu_exp_gp_seq_done()``, which returns ``true`` if a full expedited + grace period has elapsed since the corresponding call to + ``rcu_exp_gp_seq_snap()``. + +Again, only one request in a given batch need actually carry out a +grace-period operation, which means there must be an efficient way to +identify which of many concurrent requests will initiate the grace +period, and that there be an efficient way for the remaining requests to +wait for that grace period to complete. However, that is the topic of +the next section. + +Funnel Locking and Wait/Wakeup +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The natural way to sort out which of a batch of updaters will initiate +the expedited grace period is to use the ``rcu_node`` combining tree, as +implemented by the ``exp_funnel_lock()`` function. The first updater +corresponding to a given grace period arriving at a given ``rcu_node`` +structure records its desired grace-period sequence number in the +``->exp_seq_rq`` field and moves up to the next level in the tree. +Otherwise, if the ``->exp_seq_rq`` field already contains the sequence +number for the desired grace period or some later one, the updater +blocks on one of four wait queues in the ``->exp_wq[]`` array, using the +second-from-bottom and third-from bottom bits as an index. An +``->exp_lock`` field in the ``rcu_node`` structure synchronizes access +to these fields. + +An empty ``rcu_node`` tree is shown in the following diagram, with the +white cells representing the ``->exp_seq_rq`` field and the red cells +representing the elements of the ``->exp_wq[]`` array. + +.. kernel-figure:: Funnel0.svg + +The next diagram shows the situation after the arrival of Task A and +Task B at the leftmost and rightmost leaf ``rcu_node`` structures, +respectively. The current value of the ``rcu_state`` structure's +``->expedited_sequence`` field is zero, so adding three and clearing the +bottom bit results in the value two, which both tasks record in the +``->exp_seq_rq`` field of their respective ``rcu_node`` structures: + +.. kernel-figure:: Funnel1.svg + +Each of Tasks A and B will move up to the root ``rcu_node`` structure. +Suppose that Task A wins, recording its desired grace-period sequence +number and resulting in the state shown below: + +.. kernel-figure:: Funnel2.svg + +Task A now advances to initiate a new grace period, while Task B moves +up to the root ``rcu_node`` structure, and, seeing that its desired +sequence number is already recorded, blocks on ``->exp_wq[1]``. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why ``->exp_wq[1]``? Given that the value of these tasks' desired | +| sequence number is two, so shouldn't they instead block on | +| ``->exp_wq[2]``? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| No. | +| Recall that the bottom bit of the desired sequence number indicates | +| whether or not a grace period is currently in progress. It is | +| therefore necessary to shift the sequence number right one bit | +| position to obtain the number of the grace period. This results in | +| ``->exp_wq[1]``. | ++-----------------------------------------------------------------------+ + +If Tasks C and D also arrive at this point, they will compute the same +desired grace-period sequence number, and see that both leaf +``rcu_node`` structures already have that value recorded. They will +therefore block on their respective ``rcu_node`` structures' +``->exp_wq[1]`` fields, as shown below: + +.. kernel-figure:: Funnel3.svg + +Task A now acquires the ``rcu_state`` structure's ``->exp_mutex`` and +initiates the grace period, which increments ``->expedited_sequence``. +Therefore, if Tasks E and F arrive, they will compute a desired sequence +number of 4 and will record this value as shown below: + +.. kernel-figure:: Funnel4.svg + +Tasks E and F will propagate up the ``rcu_node`` combining tree, with +Task F blocking on the root ``rcu_node`` structure and Task E wait for +Task A to finish so that it can start the next grace period. The +resulting state is as shown below: + +.. kernel-figure:: Funnel5.svg + +Once the grace period completes, Task A starts waking up the tasks +waiting for this grace period to complete, increments the +``->expedited_sequence``, acquires the ``->exp_wake_mutex`` and then +releases the ``->exp_mutex``. This results in the following state: + +.. kernel-figure:: Funnel6.svg + +Task E can then acquire ``->exp_mutex`` and increment +``->expedited_sequence`` to the value three. If new tasks G and H arrive +and moves up the combining tree at the same time, the state will be as +follows: + +.. kernel-figure:: Funnel7.svg + +Note that three of the root ``rcu_node`` structure's waitqueues are now +occupied. However, at some point, Task A will wake up the tasks blocked +on the ``->exp_wq`` waitqueues, resulting in the following state: + +.. kernel-figure:: Funnel8.svg + +Execution will continue with Tasks E and H completing their grace +periods and carrying out their wakeups. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| What happens if Task A takes so long to do its wakeups that Task E's | +| grace period completes? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Then Task E will block on the ``->exp_wake_mutex``, which will also | +| prevent it from releasing ``->exp_mutex``, which in turn will prevent | +| the next grace period from starting. This last is important in | +| preventing overflow of the ``->exp_wq[]`` array. | ++-----------------------------------------------------------------------+ + +Use of Workqueues +~~~~~~~~~~~~~~~~~ + +In earlier implementations, the task requesting the expedited grace +period also drove it to completion. This straightforward approach had +the disadvantage of needing to account for POSIX signals sent to user +tasks, so more recent implementations use the Linux kernel's +workqueues (see Documentation/core-api/workqueue.rst). + +The requesting task still does counter snapshotting and funnel-lock +processing, but the task reaching the top of the funnel lock does a +``schedule_work()`` (from ``_synchronize_rcu_expedited()`` so that a +workqueue kthread does the actual grace-period processing. Because +workqueue kthreads do not accept POSIX signals, grace-period-wait +processing need not allow for POSIX signals. In addition, this approach +allows wakeups for the previous expedited grace period to be overlapped +with processing for the next expedited grace period. Because there are +only four sets of waitqueues, it is necessary to ensure that the +previous grace period's wakeups complete before the next grace period's +wakeups start. This is handled by having the ``->exp_mutex`` guard +expedited grace-period processing and the ``->exp_wake_mutex`` guard +wakeups. The key point is that the ``->exp_mutex`` is not released until +the first wakeup is complete, which means that the ``->exp_wake_mutex`` +has already been acquired at that point. This approach ensures that the +previous grace period's wakeups can be carried out while the current +grace period is in process, but that these wakeups will complete before +the next grace period starts. This means that only three waitqueues are +required, guaranteeing that the four that are provided are sufficient. + +Stall Warnings +~~~~~~~~~~~~~~ + +Expediting grace periods does nothing to speed things up when RCU +readers take too long, and therefore expedited grace periods check for +stalls just as normal grace periods do. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But why not just let the normal grace-period machinery detect the | +| stalls, given that a given reader must block both normal and | +| expedited grace periods? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Because it is quite possible that at a given time there is no normal | +| grace period in progress, in which case the normal grace period | +| cannot emit a stall warning. | ++-----------------------------------------------------------------------+ + +The ``synchronize_sched_expedited_wait()`` function loops waiting for +the expedited grace period to end, but with a timeout set to the current +RCU CPU stall-warning time. If this time is exceeded, any CPUs or +``rcu_node`` structures blocking the current grace period are printed. +Each stall warning results in another pass through the loop, but the +second and subsequent passes use longer stall times. + +Mid-boot operation +~~~~~~~~~~~~~~~~~~ + +The use of workqueues has the advantage that the expedited grace-period +code need not worry about POSIX signals. Unfortunately, it has the +corresponding disadvantage that workqueues cannot be used until they are +initialized, which does not happen until some time after the scheduler +spawns the first task. Given that there are parts of the kernel that +really do want to execute grace periods during this mid-boot “dead +zone”, expedited grace periods must do something else during this time. + +What they do is to fall back to the old practice of requiring that the +requesting task drive the expedited grace period, as was the case before +the use of workqueues. However, the requesting task is only required to +drive the grace period during the mid-boot dead zone. Before mid-boot, a +synchronous grace period is a no-op. Some time after mid-boot, +workqueues are used. + +Non-expedited non-SRCU synchronous grace periods must also operate +normally during mid-boot. This is handled by causing non-expedited grace +periods to take the expedited code path during mid-boot. + +The current code assumes that there are no POSIX signals during the +mid-boot dead zone. However, if an overwhelming need for POSIX signals +somehow arises, appropriate adjustments can be made to the expedited +stall-warning code. One such adjustment would reinstate the +pre-workqueue stall-warning checks, but only during the mid-boot dead +zone. + +With this refinement, synchronous grace periods can now be used from +task context pretty much any time during the life of the kernel. That +is, aside from some points in the suspend, hibernate, or shutdown code +path. + +Summary +~~~~~~~ + +Expedited grace periods use a sequence-number approach to promote +batching, so that a single grace-period operation can serve numerous +requests. A funnel lock is used to efficiently identify the one task out +of a concurrent group that will request the grace period. All members of +the group will block on waitqueues provided in the ``rcu_node`` +structure. The actual grace-period processing is carried out by a +workqueue. + +CPU-hotplug operations are noted lazily in order to prevent the need for +tight synchronization between expedited grace periods and CPU-hotplug +operations. The dyntick-idle counters are used to avoid sending IPIs to +idle CPUs, at least in the common case. RCU-preempt and RCU-sched use +different IPI handlers and different code to respond to the state +changes carried out by those handlers, but otherwise use common code. + +Quiescent states are tracked using the ``rcu_node`` tree, and once all +necessary quiescent states have been reported, all tasks waiting on this +expedited grace period are awakened. A pair of mutexes are used to allow +one grace period's wakeups to proceed concurrently with the next grace +period's processing. + +This combination of mechanisms allows expedited grace periods to run +reasonably efficiently. However, for non-time-critical tasks, normal +grace periods should be used instead because their longer duration +permits much higher degrees of batching, and thus much lower per-request +overheads. diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg new file mode 100644 index 0000000000..16b1ff0ad3 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel0.svg @@ -0,0 +1,275 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel0.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="201.06495" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="171" + inkscape:window-y="279" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 0</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.45404" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="145.45404" + y="360.25174" + style="font-size:10px">:0</tspan></text> + </g> + <g + id="g3997-7" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.45404" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.45404" + y="360.25174" + style="font-size:10px">:0</tspan></text> + </g> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg new file mode 100644 index 0000000000..684a4b9697 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel1.svg @@ -0,0 +1,275 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel1.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="201.06495" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="g3997-7" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="363" + inkscape:window-y="336" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 0</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">A:2</tspan></text> + </g> + <g + id="g3997-7" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">B:2</tspan></text> + </g> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg new file mode 100644 index 0000000000..8fb2454d95 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel2.svg @@ -0,0 +1,287 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel2.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="114.01552" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="g3997-7" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="363" + inkscape:window-y="336" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 0</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">:2</tspan></text> + </g> + <g + id="g3997-7" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">B:2</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="275.59558" + y="291.95297" + id="text3013-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-7" + x="275.59558" + y="291.95297" + style="font-size:10px">A:2</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg new file mode 100644 index 0000000000..5d4f22d566 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel3.svg @@ -0,0 +1,323 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel3.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="114.01552" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="68" + inkscape:window-y="180" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 0 GP: A</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">:2</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.51051" + y="360.18094" + id="text3013-3-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6" + x="232.51051" + y="360.18094" + style="font-size:10px">C</tspan></text> + </g> + <g + id="g3019" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">:2</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.31764" + y="360.18582" + id="text3013-3-3-7" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6-5" + x="232.31764" + y="360.18582" + style="font-size:10px">D</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="275.59558" + y="291.95297" + id="text3013-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-7" + x="275.59558" + y="291.95297" + style="font-size:10px">:2</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="361.97092" + y="291.88705" + id="text3013-3-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7" + x="361.97092" + y="291.88705" + style="font-size:10px">B</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg new file mode 100644 index 0000000000..b89b028699 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel4.svg @@ -0,0 +1,323 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel4.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="114.01552" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="68" + inkscape:window-y="180" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 1 GP: A</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">E:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.51051" + y="360.18094" + id="text3013-3-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6" + x="232.51051" + y="360.18094" + style="font-size:10px">C</tspan></text> + </g> + <g + id="g3019" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">F:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.31764" + y="360.18582" + id="text3013-3-3-7" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6-5" + x="232.31764" + y="360.18582" + style="font-size:10px">D</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="275.59558" + y="291.95297" + id="text3013-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-7" + x="275.59558" + y="291.95297" + style="font-size:10px">:2</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="361.97092" + y="291.88705" + id="text3013-3-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7" + x="361.97092" + y="291.88705" + style="font-size:10px">B</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg new file mode 100644 index 0000000000..90f1c77bea --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel5.svg @@ -0,0 +1,335 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel5.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="114.01552" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="68" + inkscape:window-y="180" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 1 GP: A,E</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.51051" + y="360.18094" + id="text3013-3-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6" + x="232.51051" + y="360.18094" + style="font-size:10px">C</tspan></text> + </g> + <g + id="g3019" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.31764" + y="360.18582" + id="text3013-3-3-7" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6-5" + x="232.31764" + y="360.18582" + style="font-size:10px">D</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="275.59558" + y="291.95297" + id="text3013-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-7" + x="275.59558" + y="291.95297" + style="font-size:10px">:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="361.97092" + y="291.88705" + id="text3013-3-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7" + x="361.97092" + y="291.88705" + style="font-size:10px">B</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="405.40396" + y="291.88705" + id="text3013-3-36-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7-6" + x="405.40396" + y="291.88705" + style="font-size:10px">F</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg new file mode 100644 index 0000000000..3e5651da03 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel6.svg @@ -0,0 +1,335 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel6.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="114.01552" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="68" + inkscape:window-y="180" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 2 GP: E Wakeup: A</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.51051" + y="360.18094" + id="text3013-3-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6" + x="232.51051" + y="360.18094" + style="font-size:10px">C</tspan></text> + </g> + <g + id="g3019" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.31764" + y="360.18582" + id="text3013-3-3-7" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6-5" + x="232.31764" + y="360.18582" + style="font-size:10px">D</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="275.59558" + y="291.95297" + id="text3013-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-7" + x="275.59558" + y="291.95297" + style="font-size:10px">:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="361.97092" + y="291.88705" + id="text3013-3-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7" + x="361.97092" + y="291.88705" + style="font-size:10px">B</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="405.40396" + y="291.88705" + id="text3013-3-36-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7-6" + x="405.40396" + y="291.88705" + style="font-size:10px">F</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg new file mode 100644 index 0000000000..9483f08d34 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel7.svg @@ -0,0 +1,347 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel7.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="114.01552" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="68" + inkscape:window-y="180" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 3 GP: E,H Wakeup: A</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">:4</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.51051" + y="360.18094" + id="text3013-3-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6" + x="232.51051" + y="360.18094" + style="font-size:10px">C</tspan></text> + </g> + <g + id="g3019" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">:6</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="232.31764" + y="360.18582" + id="text3013-3-3-7" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-6-5" + x="232.31764" + y="360.18582" + style="font-size:10px">D</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="275.59558" + y="291.95297" + id="text3013-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-7" + x="275.59558" + y="291.95297" + style="font-size:10px">:6</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="361.97092" + y="291.88705" + id="text3013-3-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7" + x="361.97092" + y="291.88705" + style="font-size:10px">B</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="405.40396" + y="291.88705" + id="text3013-3-36-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7-6" + x="405.40396" + y="291.88705" + style="font-size:10px">F</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="449.22031" + y="291.88217" + id="text3013-3-36-3-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7-6-6" + x="449.22031" + y="291.88217" + style="font-size:10px">G</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg new file mode 100644 index 0000000000..1101ec30e6 --- /dev/null +++ b/Documentation/RCU/Design/Expedited-Grace-Periods/Funnel8.svg @@ -0,0 +1,311 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="490.05093" + height="125.78741" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="Funnel8.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="114.01552" + inkscape:cy="-86.548414" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="68" + inkscape:window-y="180" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-117.08462,-249.92053)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="362.371" + y="262.51819" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="362.371" + y="262.51819">->expedited_sequence: 3 GP: E,H</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101" + width="43.158947" + height="26.33428" + x="253.55223" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3" + width="43.158947" + height="26.33428" + x="297.04141" + y="275.07489" /> + <rect + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect3101-3-6" + width="43.158947" + height="26.33428" + x="427.509" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7" + width="43.158947" + height="26.33428" + x="384.01981" + y="275.07489" /> + <rect + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" + id="rect3101-3-6-7-5" + width="43.158947" + height="26.33428" + x="340.53061" + y="275.07489" /> + <g + id="g3997" + transform="translate(-0.87295532,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2" + style="fill:#ff8282;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0;fill-opacity:1" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="146.00092" + y="360.25174" + id="text3013" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015" + x="146.00092" + y="360.25174" + style="font-size:10px">:4</tspan></text> + </g> + <g + id="g3019" + transform="translate(260.06223,0)"> + <rect + y="343.37366" + x="123.95757" + height="26.33428" + width="43.158947" + id="rect3101-35-0" + style="fill:none;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="167.44673" + height="26.33428" + width="43.158947" + id="rect3101-3-62-9" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="297.91437" + height="26.33428" + width="43.158947" + id="rect3101-3-6-9-3" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="254.42516" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-1-6" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <rect + y="343.37366" + x="210.93593" + height="26.33428" + width="43.158947" + id="rect3101-3-6-7-5-2-0" + style="fill:#ff8282;fill-opacity:1;stroke:#000000;stroke-width:2;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" /> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="145.54926" + y="360.25174" + id="text3013-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6" + x="145.54926" + y="360.25174" + style="font-size:10px">:6</tspan></text> + </g> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="275.59558" + y="291.95297" + id="text3013-36" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-7" + x="275.59558" + y="291.95297" + style="font-size:10px">:6</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="405.40396" + y="291.88705" + id="text3013-3-36-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7-6" + x="405.40396" + y="291.88705" + style="font-size:10px">F</tspan></text> + <text + xml:space="preserve" + style="font-size:20px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="449.22031" + y="291.88217" + id="text3013-3-36-3-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3015-6-7-6-6" + x="449.22031" + y="291.88217" + style="font-size:10px">G</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst new file mode 100644 index 0000000000..5750f12536 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/Tree-RCU-Memory-Ordering.rst @@ -0,0 +1,648 @@ +====================================================== +A Tour Through TREE_RCU's Grace-Period Memory Ordering +====================================================== + +August 8, 2017 + +This article was contributed by Paul E. McKenney + +Introduction +============ + +This document gives a rough visual overview of how Tree RCU's +grace-period memory ordering guarantee is provided. + +What Is Tree RCU's Grace Period Memory Ordering Guarantee? +========================================================== + +RCU grace periods provide extremely strong memory-ordering guarantees +for non-idle non-offline code. +Any code that happens after the end of a given RCU grace period is guaranteed +to see the effects of all accesses prior to the beginning of that grace +period that are within RCU read-side critical sections. +Similarly, any code that happens before the beginning of a given RCU grace +period is guaranteed to not see the effects of all accesses following the end +of that grace period that are within RCU read-side critical sections. + +Note well that RCU-sched read-side critical sections include any region +of code for which preemption is disabled. +Given that each individual machine instruction can be thought of as +an extremely small region of preemption-disabled code, one can think of +``synchronize_rcu()`` as ``smp_mb()`` on steroids. + +RCU updaters use this guarantee by splitting their updates into +two phases, one of which is executed before the grace period and +the other of which is executed after the grace period. +In the most common use case, phase one removes an element from +a linked RCU-protected data structure, and phase two frees that element. +For this to work, any readers that have witnessed state prior to the +phase-one update (in the common case, removal) must not witness state +following the phase-two update (in the common case, freeing). + +The RCU implementation provides this guarantee using a network +of lock-based critical sections, memory barriers, and per-CPU +processing, as is described in the following sections. + +Tree RCU Grace Period Memory Ordering Building Blocks +===================================================== + +The workhorse for RCU's grace-period memory ordering is the +critical section for the ``rcu_node`` structure's +``->lock``. These critical sections use helper functions for lock +acquisition, including ``raw_spin_lock_rcu_node()``, +``raw_spin_lock_irq_rcu_node()``, and ``raw_spin_lock_irqsave_rcu_node()``. +Their lock-release counterparts are ``raw_spin_unlock_rcu_node()``, +``raw_spin_unlock_irq_rcu_node()``, and +``raw_spin_unlock_irqrestore_rcu_node()``, respectively. +For completeness, a ``raw_spin_trylock_rcu_node()`` is also provided. +The key point is that the lock-acquisition functions, including +``raw_spin_trylock_rcu_node()``, all invoke ``smp_mb__after_unlock_lock()`` +immediately after successful acquisition of the lock. + +Therefore, for any given ``rcu_node`` structure, any access +happening before one of the above lock-release functions will be seen +by all CPUs as happening before any access happening after a later +one of the above lock-acquisition functions. +Furthermore, any access happening before one of the +above lock-release function on any given CPU will be seen by all +CPUs as happening before any access happening after a later one +of the above lock-acquisition functions executing on that same CPU, +even if the lock-release and lock-acquisition functions are operating +on different ``rcu_node`` structures. +Tree RCU uses these two ordering guarantees to form an ordering +network among all CPUs that were in any way involved in the grace +period, including any CPUs that came online or went offline during +the grace period in question. + +The following litmus test exhibits the ordering effects of these +lock-acquisition and lock-release functions:: + + 1 int x, y, z; + 2 + 3 void task0(void) + 4 { + 5 raw_spin_lock_rcu_node(rnp); + 6 WRITE_ONCE(x, 1); + 7 r1 = READ_ONCE(y); + 8 raw_spin_unlock_rcu_node(rnp); + 9 } + 10 + 11 void task1(void) + 12 { + 13 raw_spin_lock_rcu_node(rnp); + 14 WRITE_ONCE(y, 1); + 15 r2 = READ_ONCE(z); + 16 raw_spin_unlock_rcu_node(rnp); + 17 } + 18 + 19 void task2(void) + 20 { + 21 WRITE_ONCE(z, 1); + 22 smp_mb(); + 23 r3 = READ_ONCE(x); + 24 } + 25 + 26 WARN_ON(r1 == 0 && r2 == 0 && r3 == 0); + +The ``WARN_ON()`` is evaluated at "the end of time", +after all changes have propagated throughout the system. +Without the ``smp_mb__after_unlock_lock()`` provided by the +acquisition functions, this ``WARN_ON()`` could trigger, for example +on PowerPC. +The ``smp_mb__after_unlock_lock()`` invocations prevent this +``WARN_ON()`` from triggering. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But the chain of rcu_node-structure lock acquisitions guarantees | +| that new readers will see all of the updater's pre-grace-period | +| accesses and also guarantees that the updater's post-grace-period | +| accesses will see all of the old reader's accesses. So why do we | +| need all of those calls to smp_mb__after_unlock_lock()? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Because we must provide ordering for RCU's polling grace-period | +| primitives, for example, get_state_synchronize_rcu() and | +| poll_state_synchronize_rcu(). Consider this code:: | +| | +| CPU 0 CPU 1 | +| ---- ---- | +| WRITE_ONCE(X, 1) WRITE_ONCE(Y, 1) | +| g = get_state_synchronize_rcu() smp_mb() | +| while (!poll_state_synchronize_rcu(g)) r1 = READ_ONCE(X) | +| continue; | +| r0 = READ_ONCE(Y) | +| | +| RCU guarantees that the outcome r0 == 0 && r1 == 0 will not | +| happen, even if CPU 1 is in an RCU extended quiescent state | +| (idle or offline) and thus won't interact directly with the RCU | +| core processing at all. | ++-----------------------------------------------------------------------+ + +This approach must be extended to include idle CPUs, which need +RCU's grace-period memory ordering guarantee to extend to any +RCU read-side critical sections preceding and following the current +idle sojourn. +This case is handled by calls to the strongly ordered +``atomic_add_return()`` read-modify-write atomic operation that +is invoked within ``rcu_dynticks_eqs_enter()`` at idle-entry +time and within ``rcu_dynticks_eqs_exit()`` at idle-exit time. +The grace-period kthread invokes ``rcu_dynticks_snap()`` and +``rcu_dynticks_in_eqs_since()`` (both of which invoke +an ``atomic_add_return()`` of zero) to detect idle CPUs. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But what about CPUs that remain offline for the entire grace period? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Such CPUs will be offline at the beginning of the grace period, so | +| the grace period won't expect quiescent states from them. Races | +| between grace-period start and CPU-hotplug operations are mediated | +| by the CPU's leaf ``rcu_node`` structure's ``->lock`` as described | +| above. | ++-----------------------------------------------------------------------+ + +The approach must be extended to handle one final case, that of waking a +task blocked in ``synchronize_rcu()``. This task might be affined to +a CPU that is not yet aware that the grace period has ended, and thus +might not yet be subject to the grace period's memory ordering. +Therefore, there is an ``smp_mb()`` after the return from +``wait_for_completion()`` in the ``synchronize_rcu()`` code path. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| What? Where??? I don't see any ``smp_mb()`` after the return from | +| ``wait_for_completion()``!!! | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| That would be because I spotted the need for that ``smp_mb()`` during | +| the creation of this documentation, and it is therefore unlikely to | +| hit mainline before v4.14. Kudos to Lance Roy, Will Deacon, Peter | +| Zijlstra, and Jonathan Cameron for asking questions that sensitized | +| me to the rather elaborate sequence of events that demonstrate the | +| need for this memory barrier. | ++-----------------------------------------------------------------------+ + +Tree RCU's grace--period memory-ordering guarantees rely most heavily on +the ``rcu_node`` structure's ``->lock`` field, so much so that it is +necessary to abbreviate this pattern in the diagrams in the next +section. For example, consider the ``rcu_prepare_for_idle()`` function +shown below, which is one of several functions that enforce ordering of +newly arrived RCU callbacks against future grace periods: + +:: + + 1 static void rcu_prepare_for_idle(void) + 2 { + 3 bool needwake; + 4 struct rcu_data *rdp = this_cpu_ptr(&rcu_data); + 5 struct rcu_node *rnp; + 6 int tne; + 7 + 8 lockdep_assert_irqs_disabled(); + 9 if (rcu_rdp_is_offloaded(rdp)) + 10 return; + 11 + 12 /* Handle nohz enablement switches conservatively. */ + 13 tne = READ_ONCE(tick_nohz_active); + 14 if (tne != rdp->tick_nohz_enabled_snap) { + 15 if (!rcu_segcblist_empty(&rdp->cblist)) + 16 invoke_rcu_core(); /* force nohz to see update. */ + 17 rdp->tick_nohz_enabled_snap = tne; + 18 return; + 19 } + 20 if (!tne) + 21 return; + 22 + 23 /* + 24 * If we have not yet accelerated this jiffy, accelerate all + 25 * callbacks on this CPU. + 26 */ + 27 if (rdp->last_accelerate == jiffies) + 28 return; + 29 rdp->last_accelerate = jiffies; + 30 if (rcu_segcblist_pend_cbs(&rdp->cblist)) { + 31 rnp = rdp->mynode; + 32 raw_spin_lock_rcu_node(rnp); /* irqs already disabled. */ + 33 needwake = rcu_accelerate_cbs(rnp, rdp); + 34 raw_spin_unlock_rcu_node(rnp); /* irqs remain disabled. */ + 35 if (needwake) + 36 rcu_gp_kthread_wake(); + 37 } + 38 } + +But the only part of ``rcu_prepare_for_idle()`` that really matters for +this discussion are lines 32–34. We will therefore abbreviate this +function as follows: + +.. kernel-figure:: rcu_node-lock.svg + +The box represents the ``rcu_node`` structure's ``->lock`` critical +section, with the double line on top representing the additional +``smp_mb__after_unlock_lock()``. + +Tree RCU Grace Period Memory Ordering Components +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Tree RCU's grace-period memory-ordering guarantee is provided by a +number of RCU components: + +#. `Callback Registry`_ +#. `Grace-Period Initialization`_ +#. `Self-Reported Quiescent States`_ +#. `Dynamic Tick Interface`_ +#. `CPU-Hotplug Interface`_ +#. `Forcing Quiescent States`_ +#. `Grace-Period Cleanup`_ +#. `Callback Invocation`_ + +Each of the following section looks at the corresponding component in +detail. + +Callback Registry +^^^^^^^^^^^^^^^^^ + +If RCU's grace-period guarantee is to mean anything at all, any access +that happens before a given invocation of ``call_rcu()`` must also +happen before the corresponding grace period. The implementation of this +portion of RCU's grace period guarantee is shown in the following +figure: + +.. kernel-figure:: TreeRCU-callback-registry.svg + +Because ``call_rcu()`` normally acts only on CPU-local state, it +provides no ordering guarantees, either for itself or for phase one of +the update (which again will usually be removal of an element from an +RCU-protected data structure). It simply enqueues the ``rcu_head`` +structure on a per-CPU list, which cannot become associated with a grace +period until a later call to ``rcu_accelerate_cbs()``, as shown in the +diagram above. + +One set of code paths shown on the left invokes ``rcu_accelerate_cbs()`` +via ``note_gp_changes()``, either directly from ``call_rcu()`` (if the +current CPU is inundated with queued ``rcu_head`` structures) or more +likely from an ``RCU_SOFTIRQ`` handler. Another code path in the middle +is taken only in kernels built with ``CONFIG_RCU_FAST_NO_HZ=y``, which +invokes ``rcu_accelerate_cbs()`` via ``rcu_prepare_for_idle()``. The +final code path on the right is taken only in kernels built with +``CONFIG_HOTPLUG_CPU=y``, which invokes ``rcu_accelerate_cbs()`` via +``rcu_advance_cbs()``, ``rcu_migrate_callbacks``, +``rcutree_migrate_callbacks()``, and ``takedown_cpu()``, which in turn +is invoked on a surviving CPU after the outgoing CPU has been completely +offlined. + +There are a few other code paths within grace-period processing that +opportunistically invoke ``rcu_accelerate_cbs()``. However, either way, +all of the CPU's recently queued ``rcu_head`` structures are associated +with a future grace-period number under the protection of the CPU's lead +``rcu_node`` structure's ``->lock``. In all cases, there is full +ordering against any prior critical section for that same ``rcu_node`` +structure's ``->lock``, and also full ordering against any of the +current task's or CPU's prior critical sections for any ``rcu_node`` +structure's ``->lock``. + +The next section will show how this ordering ensures that any accesses +prior to the ``call_rcu()`` (particularly including phase one of the +update) happen before the start of the corresponding grace period. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But what about ``synchronize_rcu()``? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| The ``synchronize_rcu()`` passes ``call_rcu()`` to ``wait_rcu_gp()``, | +| which invokes it. So either way, it eventually comes down to | +| ``call_rcu()``. | ++-----------------------------------------------------------------------+ + +Grace-Period Initialization +^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Grace-period initialization is carried out by the grace-period kernel +thread, which makes several passes over the ``rcu_node`` tree within the +``rcu_gp_init()`` function. This means that showing the full flow of +ordering through the grace-period computation will require duplicating +this tree. If you find this confusing, please note that the state of the +``rcu_node`` changes over time, just like Heraclitus's river. However, +to keep the ``rcu_node`` river tractable, the grace-period kernel +thread's traversals are presented in multiple parts, starting in this +section with the various phases of grace-period initialization. + +The first ordering-related grace-period initialization action is to +advance the ``rcu_state`` structure's ``->gp_seq`` grace-period-number +counter, as shown below: + +.. kernel-figure:: TreeRCU-gp-init-1.svg + +The actual increment is carried out using ``smp_store_release()``, which +helps reject false-positive RCU CPU stall detection. Note that only the +root ``rcu_node`` structure is touched. + +The first pass through the ``rcu_node`` tree updates bitmasks based on +CPUs having come online or gone offline since the start of the previous +grace period. In the common case where the number of online CPUs for +this ``rcu_node`` structure has not transitioned to or from zero, this +pass will scan only the leaf ``rcu_node`` structures. However, if the +number of online CPUs for a given leaf ``rcu_node`` structure has +transitioned from zero, ``rcu_init_new_rnp()`` will be invoked for the +first incoming CPU. Similarly, if the number of online CPUs for a given +leaf ``rcu_node`` structure has transitioned to zero, +``rcu_cleanup_dead_rnp()`` will be invoked for the last outgoing CPU. +The diagram below shows the path of ordering if the leftmost +``rcu_node`` structure onlines its first CPU and if the next +``rcu_node`` structure has no online CPUs (or, alternatively if the +leftmost ``rcu_node`` structure offlines its last CPU and if the next +``rcu_node`` structure has no online CPUs). + +.. kernel-figure:: TreeRCU-gp-init-2.svg + +The final ``rcu_gp_init()`` pass through the ``rcu_node`` tree traverses +breadth-first, setting each ``rcu_node`` structure's ``->gp_seq`` field +to the newly advanced value from the ``rcu_state`` structure, as shown +in the following diagram. + +.. kernel-figure:: TreeRCU-gp-init-3.svg + +This change will also cause each CPU's next call to +``__note_gp_changes()`` to notice that a new grace period has started, +as described in the next section. But because the grace-period kthread +started the grace period at the root (with the advancing of the +``rcu_state`` structure's ``->gp_seq`` field) before setting each leaf +``rcu_node`` structure's ``->gp_seq`` field, each CPU's observation of +the start of the grace period will happen after the actual start of the +grace period. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But what about the CPU that started the grace period? Why wouldn't it | +| see the start of the grace period right when it started that grace | +| period? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| In some deep philosophical and overly anthromorphized sense, yes, the | +| CPU starting the grace period is immediately aware of having done so. | +| However, if we instead assume that RCU is not self-aware, then even | +| the CPU starting the grace period does not really become aware of the | +| start of this grace period until its first call to | +| ``__note_gp_changes()``. On the other hand, this CPU potentially gets | +| early notification because it invokes ``__note_gp_changes()`` during | +| its last ``rcu_gp_init()`` pass through its leaf ``rcu_node`` | +| structure. | ++-----------------------------------------------------------------------+ + +Self-Reported Quiescent States +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +When all entities that might block the grace period have reported +quiescent states (or as described in a later section, had quiescent +states reported on their behalf), the grace period can end. Online +non-idle CPUs report their own quiescent states, as shown in the +following diagram: + +.. kernel-figure:: TreeRCU-qs.svg + +This is for the last CPU to report a quiescent state, which signals the +end of the grace period. Earlier quiescent states would push up the +``rcu_node`` tree only until they encountered an ``rcu_node`` structure +that is waiting for additional quiescent states. However, ordering is +nevertheless preserved because some later quiescent state will acquire +that ``rcu_node`` structure's ``->lock``. + +Any number of events can lead up to a CPU invoking ``note_gp_changes`` +(or alternatively, directly invoking ``__note_gp_changes()``), at which +point that CPU will notice the start of a new grace period while holding +its leaf ``rcu_node`` lock. Therefore, all execution shown in this +diagram happens after the start of the grace period. In addition, this +CPU will consider any RCU read-side critical section that started before +the invocation of ``__note_gp_changes()`` to have started before the +grace period, and thus a critical section that the grace period must +wait on. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But a RCU read-side critical section might have started after the | +| beginning of the grace period (the advancing of ``->gp_seq`` from | +| earlier), so why should the grace period wait on such a critical | +| section? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| It is indeed not necessary for the grace period to wait on such a | +| critical section. However, it is permissible to wait on it. And it is | +| furthermore important to wait on it, as this lazy approach is far | +| more scalable than a “big bang” all-at-once grace-period start could | +| possibly be. | ++-----------------------------------------------------------------------+ + +If the CPU does a context switch, a quiescent state will be noted by +``rcu_note_context_switch()`` on the left. On the other hand, if the CPU +takes a scheduler-clock interrupt while executing in usermode, a +quiescent state will be noted by ``rcu_sched_clock_irq()`` on the right. +Either way, the passage through a quiescent state will be noted in a +per-CPU variable. + +The next time an ``RCU_SOFTIRQ`` handler executes on this CPU (for +example, after the next scheduler-clock interrupt), ``rcu_core()`` will +invoke ``rcu_check_quiescent_state()``, which will notice the recorded +quiescent state, and invoke ``rcu_report_qs_rdp()``. If +``rcu_report_qs_rdp()`` verifies that the quiescent state really does +apply to the current grace period, it invokes ``rcu_report_rnp()`` which +traverses up the ``rcu_node`` tree as shown at the bottom of the +diagram, clearing bits from each ``rcu_node`` structure's ``->qsmask`` +field, and propagating up the tree when the result is zero. + +Note that traversal passes upwards out of a given ``rcu_node`` structure +only if the current CPU is reporting the last quiescent state for the +subtree headed by that ``rcu_node`` structure. A key point is that if a +CPU's traversal stops at a given ``rcu_node`` structure, then there will +be a later traversal by another CPU (or perhaps the same one) that +proceeds upwards from that point, and the ``rcu_node`` ``->lock`` +guarantees that the first CPU's quiescent state happens before the +remainder of the second CPU's traversal. Applying this line of thought +repeatedly shows that all CPUs' quiescent states happen before the last +CPU traverses through the root ``rcu_node`` structure, the “last CPU” +being the one that clears the last bit in the root ``rcu_node`` +structure's ``->qsmask`` field. + +Dynamic Tick Interface +^^^^^^^^^^^^^^^^^^^^^^ + +Due to energy-efficiency considerations, RCU is forbidden from +disturbing idle CPUs. CPUs are therefore required to notify RCU when +entering or leaving idle state, which they do via fully ordered +value-returning atomic operations on a per-CPU variable. The ordering +effects are as shown below: + +.. kernel-figure:: TreeRCU-dyntick.svg + +The RCU grace-period kernel thread samples the per-CPU idleness variable +while holding the corresponding CPU's leaf ``rcu_node`` structure's +``->lock``. This means that any RCU read-side critical sections that +precede the idle period (the oval near the top of the diagram above) +will happen before the end of the current grace period. Similarly, the +beginning of the current grace period will happen before any RCU +read-side critical sections that follow the idle period (the oval near +the bottom of the diagram above). + +Plumbing this into the full grace-period execution is described +`below <Forcing Quiescent States_>`__. + +CPU-Hotplug Interface +^^^^^^^^^^^^^^^^^^^^^ + +RCU is also forbidden from disturbing offline CPUs, which might well be +powered off and removed from the system completely. CPUs are therefore +required to notify RCU of their comings and goings as part of the +corresponding CPU hotplug operations. The ordering effects are shown +below: + +.. kernel-figure:: TreeRCU-hotplug.svg + +Because CPU hotplug operations are much less frequent than idle +transitions, they are heavier weight, and thus acquire the CPU's leaf +``rcu_node`` structure's ``->lock`` and update this structure's +``->qsmaskinitnext``. The RCU grace-period kernel thread samples this +mask to detect CPUs having gone offline since the beginning of this +grace period. + +Plumbing this into the full grace-period execution is described +`below <Forcing Quiescent States_>`__. + +Forcing Quiescent States +^^^^^^^^^^^^^^^^^^^^^^^^ + +As noted above, idle and offline CPUs cannot report their own quiescent +states, and therefore the grace-period kernel thread must do the +reporting on their behalf. This process is called “forcing quiescent +states”, it is repeated every few jiffies, and its ordering effects are +shown below: + +.. kernel-figure:: TreeRCU-gp-fqs.svg + +Each pass of quiescent state forcing is guaranteed to traverse the leaf +``rcu_node`` structures, and if there are no new quiescent states due to +recently idled and/or offlined CPUs, then only the leaves are traversed. +However, if there is a newly offlined CPU as illustrated on the left or +a newly idled CPU as illustrated on the right, the corresponding +quiescent state will be driven up towards the root. As with +self-reported quiescent states, the upwards driving stops once it +reaches an ``rcu_node`` structure that has quiescent states outstanding +from other CPUs. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| The leftmost drive to root stopped before it reached the root | +| ``rcu_node`` structure, which means that there are still CPUs | +| subordinate to that structure on which the current grace period is | +| waiting. Given that, how is it possible that the rightmost drive to | +| root ended the grace period? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Good analysis! It is in fact impossible in the absence of bugs in | +| RCU. But this diagram is complex enough as it is, so simplicity | +| overrode accuracy. You can think of it as poetic license, or you can | +| think of it as misdirection that is resolved in the | +| `stitched-together diagram <Putting It All Together_>`__. | ++-----------------------------------------------------------------------+ + +Grace-Period Cleanup +^^^^^^^^^^^^^^^^^^^^ + +Grace-period cleanup first scans the ``rcu_node`` tree breadth-first +advancing all the ``->gp_seq`` fields, then it advances the +``rcu_state`` structure's ``->gp_seq`` field. The ordering effects are +shown below: + +.. kernel-figure:: TreeRCU-gp-cleanup.svg + +As indicated by the oval at the bottom of the diagram, once grace-period +cleanup is complete, the next grace period can begin. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But when precisely does the grace period end? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| There is no useful single point at which the grace period can be said | +| to end. The earliest reasonable candidate is as soon as the last CPU | +| has reported its quiescent state, but it may be some milliseconds | +| before RCU becomes aware of this. The latest reasonable candidate is | +| once the ``rcu_state`` structure's ``->gp_seq`` field has been | +| updated, but it is quite possible that some CPUs have already | +| completed phase two of their updates by that time. In short, if you | +| are going to work with RCU, you need to learn to embrace uncertainty. | ++-----------------------------------------------------------------------+ + +Callback Invocation +^^^^^^^^^^^^^^^^^^^ + +Once a given CPU's leaf ``rcu_node`` structure's ``->gp_seq`` field has +been updated, that CPU can begin invoking its RCU callbacks that were +waiting for this grace period to end. These callbacks are identified by +``rcu_advance_cbs()``, which is usually invoked by +``__note_gp_changes()``. As shown in the diagram below, this invocation +can be triggered by the scheduling-clock interrupt +(``rcu_sched_clock_irq()`` on the left) or by idle entry +(``rcu_cleanup_after_idle()`` on the right, but only for kernels build +with ``CONFIG_RCU_FAST_NO_HZ=y``). Either way, ``RCU_SOFTIRQ`` is +raised, which results in ``rcu_do_batch()`` invoking the callbacks, +which in turn allows those callbacks to carry out (either directly or +indirectly via wakeup) the needed phase-two processing for each update. + +.. kernel-figure:: TreeRCU-callback-invocation.svg + +Please note that callback invocation can also be prompted by any number +of corner-case code paths, for example, when a CPU notes that it has +excessive numbers of callbacks queued. In all cases, the CPU acquires +its leaf ``rcu_node`` structure's ``->lock`` before invoking callbacks, +which preserves the required ordering against the newly completed grace +period. + +However, if the callback function communicates to other CPUs, for +example, doing a wakeup, then it is that function's responsibility to +maintain ordering. For example, if the callback function wakes up a task +that runs on some other CPU, proper ordering must in place in both the +callback function and the task being awakened. To see why this is +important, consider the top half of the `grace-period +cleanup`_ diagram. The callback might be +running on a CPU corresponding to the leftmost leaf ``rcu_node`` +structure, and awaken a task that is to run on a CPU corresponding to +the rightmost leaf ``rcu_node`` structure, and the grace-period kernel +thread might not yet have reached the rightmost leaf. In this case, the +grace period's memory ordering might not yet have reached that CPU, so +again the callback function and the awakened task must supply proper +ordering. + +Putting It All Together +~~~~~~~~~~~~~~~~~~~~~~~ + +A stitched-together diagram is here: + +.. kernel-figure:: TreeRCU-gp.svg + +Legal Statement +~~~~~~~~~~~~~~~ + +This work represents the view of the author and does not necessarily +represent the view of IBM. + +Linux is a registered trademark of Linus Torvalds. + +Other company, product, and service names may be trademarks or service +marks of others. diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-invocation.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-invocation.svg new file mode 100644 index 0000000000..3fcf0c17ce --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-invocation.svg @@ -0,0 +1,486 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="592.12805" + height="469.83038" + viewBox="-44 -44 7874.1949 6244.9802" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-callback-invocation.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="1.2009216" + inkscape:cx="289.88715" + inkscape:cy="219.06265" + inkscape:window-x="713" + inkscape:window-y="28" + inkscape:window-maximized="0" + inkscape:current-layer="g3058" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5"> + <inkscape:grid + type="xygrid" + id="grid3079" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="-116.00011px" + originy="-87.2081px" /> + </sodipodi:namedview> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(-2296.0293,-2364.1166)"> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,2411.7612 0,4920.3076" + id="path3134-9-0-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,4672.443 -2393.6631,0.5116 0,1196.8316 2393.6631,-0.5116" + id="path3134-9-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,4672.443 2393.6631,0.5116 0,1196.8316 -2393.6631,-0.5116" + id="path3134-9-0-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5710 5790--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4512 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1040 9300 - 1502 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2240 8100 - 2702 5940--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1350 3450 - 2444 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4950 3450 - 3854 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 6600 - 4050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 6600 - 1050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 5400 - 2250 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 8100 - 2250 6240--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 9300 - 1050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5250 6240--> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9300 3150 - 10860 3150--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 3600 - 11400 4410--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 5100 - 11400 5910--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9900 4650 - 10860 4650--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9600 6150 - 10860 6150--> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 5400 - 5250 4290--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <rect + x="2333.5203" + y="5109.5566" + width="2844.0974" + height="360.77411" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.0005789, 60.00115781;stroke-dashoffset:0" + id="rect118-3" + ry="0" /> + <text + xml:space="preserve" + x="2562.135" + y="5357.9937" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_sched_clock_irq()</text> + <rect + x="7069.6187" + y="5087.4678" + width="2975.115" + height="382.86298" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057902, 60.00115804;stroke-dashoffset:0" + id="rect118-36" + ry="0" /> + <text + xml:space="preserve" + x="7165.2524" + y="5333.4927" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_cleanup_after_idle()</text> + <g + id="g3058" + transform="translate(-53.192514,-2819.2063)"> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier" + id="text202" + font-size="192" + font-weight="bold" + font-style="normal" + y="6532.0293" + x="5073.3374" + xml:space="preserve">rcu_advance_cbs()</text> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="5650.2598" + x="4800.2563" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="5726.2852" + x="4800.2563" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-3-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="6961.395" + x="7220.106" + xml:space="preserve"><tspan + id="tspan3104-6-5" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Leaf</tspan></text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-3" + font-size="192" + font-weight="bold" + font-style="normal" + y="6321.9248" + x="5073.3374" + xml:space="preserve">__note_gp_changes()</text> + </g> + <g + id="g3049" + transform="translate(26.596257,6090.5512)"> + <path + transform="matrix(13.298129,0,0,13.298129,1872.6808,-2726.4833)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-3" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-6" + font-size="192" + font-weight="bold" + font-style="normal" + y="1785.2073" + x="5717.4517" + xml:space="preserve"><tspan + id="tspan3104-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Phase Two</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-5" + y="2005.6624" + x="6119.668" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="2005.6624" + x="6119.668" + id="tspan3112-3" + sodipodi:role="line">of Update</tspan></text> + </g> + <rect + x="5097.8271" + y="6268.2183" + width="1994.7195" + height="664.90662" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057858, 60.00115716;stroke-dashoffset:0" + id="rect118-36-3" + ry="0" /> + <text + xml:space="preserve" + x="5363.7886" + y="6534.1812" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">RCU_SOFTIRQ</text> + <text + xml:space="preserve" + x="5363.7886" + y="6800.1436" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6-6-7" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_do_batch()</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-registry.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-registry.svg new file mode 100644 index 0000000000..7ac6f92698 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-callback-registry.svg @@ -0,0 +1,655 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="816.04761" + height="636.55627" + viewBox="-44 -44 10851.906 8461.0989" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-callback-registry.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="1.2009216" + inkscape:cx="408.02381" + inkscape:cy="254.38856" + inkscape:window-x="713" + inkscape:window-y="28" + inkscape:window-maximized="0" + inkscape:current-layer="g4" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5"> + <inkscape:grid + type="xygrid" + id="grid3079" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="5.2596966e-08px" + originy="-4.5963961e-06px" /> + </sodipodi:namedview> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(-753.44492,-1306.6788)"> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,2411.7612 0,6117.1391" + id="path3134-9-0-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,3342.6302 -3856.4573,0 10.6979,5757.1962 2918.1436,-2e-4" + id="path3134-9-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,3342.6302 3856.4574,0 -12.188,5757.1963 -2918.1436,-3e-4" + id="path3134-9-0-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5710 5790--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4512 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1040 9300 - 1502 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2240 8100 - 2702 5940--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1350 3450 - 2444 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4950 3450 - 3854 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 6600 - 4050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 6600 - 1050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 5400 - 2250 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 8100 - 2250 6240--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 9300 - 1050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5250 6240--> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9300 3150 - 10860 3150--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 3600 - 11400 4410--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 5100 - 11400 5910--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9900 4650 - 10860 4650--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9600 6150 - 10860 6150--> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 5400 - 5250 4290--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <rect + x="4544.7305" + y="4603.417" + width="3240.0088" + height="2650.6289" + rx="0" + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + id="rect118" + ry="0" /> + <text + xml:space="preserve" + x="5073.3374" + y="6372.4521" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">rcu_accelerate_cbs()</text> + <g + id="g3107" + transform="translate(2715.7065,4700.8888)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="4773.3452" + y="4825.2578" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_prepare_for_idle()</text> + <rect + x="790.93585" + y="4630.8252" + width="3240.0088" + height="2650.6289" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.0005789, 60.00115781;stroke-dashoffset:0" + id="rect118-3" + ry="0" /> + <text + xml:space="preserve" + x="1319.5447" + y="6639.2261" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_accelerate_cbs()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-7" + transform="translate(-1038.0776,4728.2971)"> + <rect + id="rect112-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="1019.5512" + y="4852.666" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">note_gp_changes()</text> + <text + xml:space="preserve" + x="1319.5447" + y="6376.6328" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_advance_cbs()</text> + <text + xml:space="preserve" + x="1340.6649" + y="6111.4473" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-2" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">__note_gp_changes()</text> + <rect + x="5422.6279" + y="3041.8311" + width="1480.4871" + height="379.24637" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.0005789, 60.00115794;stroke-dashoffset:0" + id="rect118-3-9" + ry="0" /> + <text + xml:space="preserve" + x="5607.2734" + y="3283.3892" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">call_rcu()</text> + <path + sodipodi:type="arc" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + id="path3084" + sodipodi:cx="319.379" + sodipodi:cy="345.54001" + sodipodi:rx="65.917107" + sodipodi:ry="39.550262" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + transform="matrix(13.298129,0,0,13.298129,1915.7286,4523.6528)" /> + <text + xml:space="preserve" + x="5853.9238" + y="8902.3623" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104">Wake up</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6165.7158" + y="9122.8174" + id="text3110" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3112" + x="6165.7158" + y="9122.8174">grace-period</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6162.8716" + y="9364.3564" + id="text3114" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3116" + x="6162.8716" + y="9364.3564">kernel thread</tspan></text> + <rect + x="8239.8516" + y="4608.7363" + width="3240.0088" + height="2650.6289" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057902, 60.00115804;stroke-dashoffset:0" + id="rect118-36" + ry="0" /> + <text + xml:space="preserve" + x="8768.4678" + y="6484.1562" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-75" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_accelerate_cbs()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-3" + transform="translate(6410.833,4706.2127)"> + <rect + id="rect112-56" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="8329.5352" + y="4830.5771" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">takedown_cpu()</text> + <text + xml:space="preserve" + x="8335.4873" + y="5094.127" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcutree_migrate_callbacks()</text> + <text + xml:space="preserve" + x="8335.4873" + y="5357.1006" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_migrate_callbacks()</text> + <text + xml:space="preserve" + x="8768.4678" + y="6224.9038" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_advance_cbs()</text> + <text + xml:space="preserve" + x="3467.9963" + y="6987.9912" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6">Leaf</tspan></text> + <text + xml:space="preserve" + x="7220.106" + y="6961.395" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Leaf</tspan></text> + <text + xml:space="preserve" + x="10905.331" + y="6961.395" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-5">Leaf</tspan></text> + <path + sodipodi:type="arc" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + id="path3084-3" + sodipodi:cx="319.379" + sodipodi:cy="345.54001" + sodipodi:rx="65.917107" + sodipodi:ry="39.550262" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + transform="matrix(13.298129,0,0,13.298129,1872.6808,-2726.4833)" /> + <text + xml:space="preserve" + x="5717.4517" + y="1785.2073" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-7">Phase One</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6119.668" + y="2005.6624" + id="text3110-5" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3112-3" + x="6119.668" + y="2005.6624">of Update</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-dyntick.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-dyntick.svg new file mode 100644 index 0000000000..423df00c4d --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-dyntick.svg @@ -0,0 +1,700 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="670.61804" + height="557.16394" + viewBox="-44 -44 8917.9652 7405.8166" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-dyntick.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36" + style="overflow:visible"> + <path + id="path3940-0" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-6" + style="overflow:visible"> + <path + id="path3940-26" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-8" + style="overflow:visible"> + <path + id="path3940-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-367" + style="overflow:visible"> + <path + id="path3940-5" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-56" + style="overflow:visible"> + <path + id="path3946-2" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3081" + style="overflow:visible"> + <path + id="path3083" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3085" + style="overflow:visible"> + <path + id="path3087" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3089" + style="overflow:visible"> + <path + id="path3091" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3093" + style="overflow:visible"> + <path + id="path3095" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3097" + style="overflow:visible"> + <path + id="path3099" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-9" + style="overflow:visible"> + <path + id="path3940-1" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3675" + style="overflow:visible"> + <path + id="path3940-3" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1148" + id="namedview208" + showgrid="true" + inkscape:zoom="1.4142136" + inkscape:cx="381.32663" + inkscape:cy="239.67141" + inkscape:window-x="833" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="svg2" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5" + inkscape:snap-global="false"> + <inkscape:grid + type="xygrid" + id="grid3154" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="-235.14935px" + originy="-709.25071px" /> + </sodipodi:namedview> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3-5" + d="m 3754.1051,47.378296 -2.828,7173.860804" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3" + d="m 6681.1176,1435.1734 -2.828,1578.9586 -2861.3912,7.7159" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1" + d="m 3748.8929,3772.1176 2904.1747,-0.8434 26.8008,1842.1825" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + id="g3115" + transform="translate(-2341.8794,10827.399)"> + <rect + ry="0" + id="rect118-3" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057923, 60.00115859;stroke-dashoffset:0" + rx="0" + height="2349.7295" + width="5308.7119" + y="-8909.5498" + x="2379.3704" /> + <g + transform="translate(2576.8841,-9085.2783)" + id="g3107-7" + style="fill:none;stroke-width:0.025in"> + <rect + x="2084.55" + y="949.37109" + width="2809.1992" + height="1370.8721" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-5" /> + <rect + x="2084.55" + y="1025.3964" + width="2809.1992" + height="1294.8468" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-3-3" /> + </g> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-6-6-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="-7356.375" + x="4769.4536" + xml:space="preserve">->qsmask &= ~->grpmask</text> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-3" + font-size="192" + font-weight="bold" + font-style="normal" + y="-6825.5815" + x="7082.9585" + xml:space="preserve"><tspan + id="tspan3104-6" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Leaf</tspan></text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="-8652.5312" + x="2466.7822" + xml:space="preserve">dyntick_save_progress_counter()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-2-0" + font-size="192" + font-weight="bold" + font-style="normal" + y="-8368.1475" + x="2463.3262" + xml:space="preserve">rcu_implicit_dynticks_qs()</text> + </g> + <g + id="g4504" + transform="translate(2063.5184,-16111.739)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3148-9-9" + transform="translate(2035.3087,6370.5796)"> + <rect + x="3592.3828" + y="-4715.7246" + width="3164.783" + height="769.99048" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4418.6582" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_dynticks_eqs_enter()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4165.7954" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">atomic_add_return()</text> + </g> + <g + id="g3148-9-9-2" + transform="translate(2035.3089,9031.6839)"> + <rect + x="3592.3828" + y="-4715.7246" + width="3164.783" + height="769.99048" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3-6" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4418.6582" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6-1" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_dynticks_eqs_exit()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4165.7954" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">atomic_add_return()</text> + </g> + <g + id="g4504-7" + transform="translate(2082.3248,-10883.562)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-9" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-0" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-2" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-3" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-7" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-5" + sodipodi:role="line">critical section</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-cleanup.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-cleanup.svg new file mode 100644 index 0000000000..bf84fbab27 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-cleanup.svg @@ -0,0 +1,1133 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="1026.1281" + height="1246.2428" + viewBox="-44 -44 13645.583 16565.045" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-gp-cleanup.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-1" + style="overflow:visible"> + <path + id="path3946-2" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3130" + style="overflow:visible"> + <path + id="path3132" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3134" + style="overflow:visible"> + <path + id="path3136" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3138" + style="overflow:visible"> + <path + id="path3140" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3142" + style="overflow:visible"> + <path + id="path3144" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3146" + style="overflow:visible"> + <path + id="path3148" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-7" + style="overflow:visible"> + <path + id="path3940-0" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36" + style="overflow:visible"> + <path + id="path3940-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36-7" + style="overflow:visible"> + <path + id="path3940-7-4" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="0.78716603" + inkscape:cx="513.06403" + inkscape:cy="623.1214" + inkscape:window-x="102" + inkscape:window-y="38" + inkscape:window-maximized="0" + inkscape:current-layer="g3188-3" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5"> + <inkscape:grid + type="xygrid" + id="grid3391" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="-1.7575793e-05px" + originy="70.717956px" /> + </sodipodi:namedview> + <path + sodipodi:nodetypes="cccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3" + d="m 6899.303,45.238347 -2.8276,2480.757053 -2316.0141,-1.687 -2.8276,2179.855 2321.1758,-0.844 -2.7042,-1843.237 2404.5142,-0.211 16.1022,1993.267 -7783.8345,-4.728 -16.7936,2120.3945 2033.1033,-23.5344 2.0128,-1866.5611 2051.9097,14.079 2.0128,1838.2983 1280.8475,-4.728 14.608,-1830.1043 1312.2492,12.923 14.608,1818.337 2000.0061,20.4217 -12.279,-1841.4117 1304.168,1.616 -12.279,2032.7057 -4638.6513,1.6154 19.5828,569.0378" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2450.4073,-11647.612)" + id="g3188"> + <text + xml:space="preserve" + x="3145.9592" + y="13255.592" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3143">rcu_seq_end(&rnp->gp_seq)</tspan></text> + <g + id="g3107" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Root</tspan></text> + </g> + <rect + ry="0" + id="rect118" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + rx="0" + height="14649.609" + width="13482.601" + y="403.13776" + x="37.490932" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="662.59283" + x="153.2673" + xml:space="preserve">rcu_gp_cleanup()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2329.9437,-11611.245)" + id="g3147"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5264.4731" + y="15428.84" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-7" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-5">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(3181.0244,-11647.612)" + id="g3153"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0">Leaf</tspan></text> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-9" + d="m 3710.957,19425.516 -20.9546,8604.655" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(-737.93887,7732.6672)" + id="g3188-3"> + <g + id="g3107-62" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112-6" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-1" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-8" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-7">Root</tspan></text> + <flowRoot + xml:space="preserve" + id="flowRoot3356" + style="font-size:12px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + transform="matrix(13.298129,0,0,13.298129,-2487.0857,3868.8376)"><flowRegion + id="flowRegion3358"><rect + id="rect3360" + width="373.35239" + height="63.63961" + x="332.34018" + y="681.87292" /></flowRegion><flowPara + id="flowPara3362" /></flowRoot> <text + xml:space="preserve" + x="3156.6121" + y="13317.754" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-0">rcu_seq_end(&rsp->gp_seq)</tspan></text> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(-858.40227,7769.0342)" + id="g3147-9"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-2" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-02" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-5" + transform="translate(5205.6909,23741.476)"> + <rect + id="rect112-7-1-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9710.0928" + y="26001.982" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-2" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-8">Leaf</tspan></text> + <g + transform="translate(-4830.8839,7769.0342)" + id="g3147-3-7" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6-3" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0-6" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6-1" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + transform="translate(-3340.0639,7732.6672)" + id="g3153-2-9" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6-3" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8-9" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7-4" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9-7">Leaf</tspan></text> + </g> + <g + transform="translate(-6672.8049,7732.6672)" + id="g3153-20-8" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2-4" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7-0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92-6">Leaf</tspan></text> + </g> + <g + transform="translate(-10005.546,7732.6672)" + id="g3153-28-0" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6-0" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1-6">Leaf</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812908px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2285.411,21615.005 -582.9982,865.094" + id="path3414-5" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5094.193,21615.267 582.998,865.094" + id="path3414-9-5" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 334.77783,23828.182 -582.9982,865.094" + id="path3414-8-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7079.8249,23828.444 582.9999,865.094" + id="path3414-9-4-7" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 1751.2742,23828.182 0,846.288" + id="path3414-8-3-65" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5628.2495,23854.778 0,846.288" + id="path3414-8-3-6-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + x="7418.769" + y="17646.104" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-70" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-93">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <g + transform="translate(-1642.5377,-11611.245)" + id="g3147-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5274.1133" + y="15428.84" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <g + transform="translate(-151.71746,-11647.612)" + id="g3153-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9">Leaf</tspan></text> + </g> + <g + transform="translate(-3484.4587,-11647.612)" + id="g3153-20" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92">Leaf</tspan></text> + <text + xml:space="preserve" + x="7408.5918" + y="17619.504" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-2" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-9">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <g + transform="translate(-6817.1997,-11647.612)" + id="g3153-28" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1">Leaf</tspan></text> + <text + xml:space="preserve" + x="7416.8003" + y="17619.504" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-3" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-56">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812908px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5473.757,2234.7264 -582.9982,865.094" + id="path3414" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8282.5389,2234.9884 582.9982,865.094" + id="path3414-9" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 3523.1239,4447.9034 -582.9982,865.094" + id="path3414-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 10268.171,4448.1654 583,865.094" + id="path3414-9-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4939.6203,4447.9034 0,846.288" + id="path3414-8-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8816.5956,4474.4994 0,846.288" + id="path3414-8-3-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4504-3-9" + transform="translate(4866.6205,-1197.2204)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16888.277" + x="4344.877" + xml:space="preserve"><tspan + id="tspan3104-5-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Start of</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0" + y="17119.1" + x="4578.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17119.1" + x="4578.7886" + id="tspan3112-5-9" + sodipodi:role="line">Next Grace</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3" + y="17350.271" + x="4581.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17350.271" + x="4581.7886" + id="tspan3116-2-6" + sodipodi:role="line">Period</tspan></text> + </g> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-5" + d="m 6875.6003,15833.906 1595.7755,0" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send-36)" /> + <text + xml:space="preserve" + x="7275.2612" + y="5971.8916" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-1" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-2">rcu_seq_end(&rnp->gp_seq)</tspan></text> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-fqs.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-fqs.svg new file mode 100644 index 0000000000..7ddc094d7f --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-fqs.svg @@ -0,0 +1,1309 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="1626.5847" + height="843.1416" + viewBox="-44 -44 21630.534 11207.028" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-gp-fqs.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36" + style="overflow:visible"> + <path + id="path3940-0" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-6" + style="overflow:visible"> + <path + id="path3940-26" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-8" + style="overflow:visible"> + <path + id="path3940-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-367" + style="overflow:visible"> + <path + id="path3940-5" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-56" + style="overflow:visible"> + <path + id="path3946-2" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3081" + style="overflow:visible"> + <path + id="path3083" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3085" + style="overflow:visible"> + <path + id="path3087" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3089" + style="overflow:visible"> + <path + id="path3091" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3093" + style="overflow:visible"> + <path + id="path3095" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3097" + style="overflow:visible"> + <path + id="path3099" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-9" + style="overflow:visible"> + <path + id="path3940-1" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-91" + style="overflow:visible"> + <path + id="path3940-27" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3082" + style="overflow:visible"> + <path + id="path3084" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-09" + style="overflow:visible"> + <path + id="path3940-3" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3093-6" + style="overflow:visible"> + <path + id="path3095-0" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3675" + style="overflow:visible"> + <path + id="path3940-35" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="0.5" + inkscape:cx="843.3925" + inkscape:cy="528.22238" + inkscape:window-x="860" + inkscape:window-y="65" + inkscape:window-maximized="0" + inkscape:current-layer="svg2" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5" + inkscape:snap-global="false"> + <inkscape:grid + type="xygrid" + id="grid3154" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="306.04964px" + originy="286.40704px" /> + </sodipodi:namedview> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1" + d="m 16000.705,7361.3625 3383.738,-0.8434 7.995,1860.9894" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3" + d="m 19393.687,5043.2247 -2.828,1541.346 -3303.342,-1.6876" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-6" + d="m 5568.2242,7353.9621 -3929.1209,17.9634 20.2153,2632.0515" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3-2" + d="m 1629.8598,3926.2473 12.2312,2669.7292 3867.5308,7.7168" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="cccccccccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3" + d="m 10932.061,46.910528 -2.827,638.638602 -5325.0378,35.9259 -21.6339,7219.96837 2057.8863,-38.4562 -21.5106,-2087.7208 -491.6705,-0.211 -2.7042,-1993.689 1393.686,-4.728 39.6256,4057.454 2379.6691,32.779 14.608,-1848.911 1312.249,12.923 14.608,1818.337 2000.007,20.422 -12.28,-1841.412 1191.331,1.616 15.929,1289.8537 520.344,0.202 m 0,0 -15.641,-1570.1327 -2629.727,-18.604 3.166,-2124.92 -2385.245,19.007 21.973,-2444.6293 5551.053,37.8148 1.584,7165.3369 m 0,0 -5602.722,0.1016 19.583,813.521" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <rect + ry="0" + id="rect118" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057925, 60.0011585;stroke-dashoffset:0" + rx="0" + height="8254.9336" + width="14128.912" + y="443.33136" + x="4032.6365" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="720.02423" + x="4178.2354" + xml:space="preserve">rcu_gp_fqs()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(6381.5083,-10649.537)" + id="g3147"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5250.5327" + y="15512.733" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-35" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(7232.589,-10685.904)" + id="g3153"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0">Leaf</tspan></text> + </g> + <g + transform="translate(2409.0267,-10649.537)" + id="g3147-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5284.6885" + y="15500.379" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <g + transform="translate(3899.8472,-10685.904)" + id="g3153-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9">Leaf</tspan></text> + </g> + <g + transform="translate(567.10542,-10685.904)" + id="g3153-20" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92">Leaf</tspan></text> + </g> + <g + transform="translate(-2765.6353,-10685.904)" + id="g3153-28" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1">Leaf</tspan></text> + <text + xml:space="preserve" + x="7428.2939" + y="17707.271" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-75" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812908px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 9525.3217,3196.4324 -582.9982,865.094" + id="path3414" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 12334.103,3196.6944 582.999,865.094" + id="path3414-9" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7574.6885,5409.6094 -582.9983,865.094" + id="path3414-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 14319.735,5409.8714 583.001,865.094" + id="path3414-9-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8991.1849,5409.6094 0,846.288" + id="path3414-8-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 12868.16,5436.2054 0,846.288" + id="path3414-8-3-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <rect + ry="0" + id="rect118-1" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057965, 60.00115916;stroke-dashoffset:0" + rx="0" + height="7164.1621" + width="13301.43" + y="984.91095" + x="4277.6021" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="1236.326" + x="4409.96" + xml:space="preserve" + sodipodi:linespacing="125%">force_qs_rnp()<tspan + style="font-size:192px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3307" /></text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="1547.8876" + x="4417.6396" + xml:space="preserve">dyntick_save_progress_counter()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(6501.9719,-10685.904)" + id="g3188"> + <g + id="g3107" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Root</tspan></text> + <text + xml:space="preserve" + x="3158.8521" + y="13313.027" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="1858.8729" + x="4414.1836" + xml:space="preserve">rcu_implicit_dynticks_qs()</text> + <text + xml:space="preserve" + x="14659.87" + y="7002.561" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-62" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + <g + id="g4504" + transform="translate(14776.087,-12503.687)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3089" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3148-9-9" + transform="translate(14747.877,9978.6315)"> + <rect + x="3592.3828" + y="-4715.7246" + width="3164.783" + height="769.99048" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4418.6582" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_dynticks_eqs_enter()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4165.7954" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">atomic_add_return()</text> + </g> + <g + id="g3148-9-9-2" + transform="translate(14747.877,12639.736)"> + <rect + x="3592.3828" + y="-4715.7246" + width="3164.783" + height="769.99048" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3-6" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4418.6582" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6-1" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_dynticks_eqs_exit()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4165.7954" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">atomic_add_return()</text> + </g> + <g + id="g4504-7" + transform="translate(14794.893,-7275.5109)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-9" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-0" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-2" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-3" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-7" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-5" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-6" + transform="translate(-2953.0872,-13662.506)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-1" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-8" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-9" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-2" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-0" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3148-9-9-3" + transform="translate(-3554.8919,9313.0075)"> + <rect + x="3592.3828" + y="-4981.6865" + width="3728.9751" + height="2265.0989" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3-7" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4684.6201" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_report_dead()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4431.7573" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0-9" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_cleanup_dying_idle_cpu()</text> + <g + transform="translate(1783.3183,-5255.3491)" + id="g3107-7-5" + style="fill:none;stroke-width:0.025in"> + <rect + x="2084.55" + y="949.37109" + width="2809.1992" + height="1370.8721" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-5-3" /> + <rect + x="2084.55" + y="1025.3964" + width="2809.1992" + height="1294.8468" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-3-3-5" /> + </g> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-6-6-2-6" + font-size="192" + font-weight="bold" + font-style="normal" + y="-3526.4448" + x="4241.8574" + xml:space="preserve">->qsmaskinitnext</text> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-3-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="-2987.4167" + x="6305.1484" + xml:space="preserve"><tspan + id="tspan3104-6-9" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Leaf</tspan></text> + </g> + <g + id="g4504-7-2" + transform="translate(-2934.2807,-6492.8204)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-9-2" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-2-8" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-0-9" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-2-7" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-3-3" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-7-6" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-5-1" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3206" + transform="translate(3999.5374,3999.1768)"> + <rect + ry="0" + id="rect118-3-5-1-3-1" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00058007, 60.00116001;stroke-dashoffset:0" + rx="0" + height="2265.0989" + width="3728.9751" + y="3382.2036" + x="-3958.3845" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27-6-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="3679.27" + x="-3804.9949" + xml:space="preserve">rcu_cpu_starting()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-7-5-0" + transform="translate(-5767.4491,3108.5424)"> + <rect + id="rect112-5-3-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-3-5-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="-3308.9099" + y="4837.4453" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-2-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinitnext</text> + <text + xml:space="preserve" + x="-1245.6189" + y="5376.4731" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-2-0" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-9-6">Leaf</tspan></text> + </g> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3-6" + d="m 15475.193,7360.7089 467.332,8.6247" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-1.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-1.svg new file mode 100644 index 0000000000..8c20755081 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-1.svg @@ -0,0 +1,658 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="1039.3743" + height="677.72852" + viewBox="-44 -44 13821.733 9008.3597" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-gp-init-1.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36" + style="overflow:visible"> + <path + id="path3940-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="2.6330492" + inkscape:cx="524.82797" + inkscape:cy="519.31194" + inkscape:window-x="79" + inkscape:window-y="28" + inkscape:window-maximized="0" + inkscape:current-layer="g3188" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5"> + <inkscape:grid + type="xygrid" + id="grid3059" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="1.6062488e-07px" + originy="10.7285px" /> + </sodipodi:namedview> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3" + d="m 6871.027,46.883461 0,8777.144039" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2450.4075,-10679.115)" + id="g3188"> + <text + xml:space="preserve" + x="3119.363" + y="13255.592" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3071">rcu_seq_start(rsp->gp_seq)</tspan></text> + <g + id="g3107" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Root</tspan></text> + </g> + <rect + ry="0" + id="rect118" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + rx="0" + height="6844.4546" + width="13658.751" + y="1371.6335" + x="37.490932" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="1631.0878" + x="153.26733" + xml:space="preserve">rcu_gp_init()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2329.9439,-10642.748)" + id="g3147"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(3181.0246,-10679.115)" + id="g3153"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0">Leaf</tspan></text> + </g> + <g + transform="translate(-1642.5375,-10642.748)" + id="g3147-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + transform="translate(-151.71726,-10679.115)" + id="g3153-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9">Leaf</tspan></text> + </g> + <g + transform="translate(-3484.4587,-10679.115)" + id="g3153-20" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92">Leaf</tspan></text> + </g> + <g + transform="translate(-6817.1998,-10679.115)" + id="g3153-28" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1">Leaf</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812908px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5473.7572,3203.2219 -582.9982,865.094" + id="path3414" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8282.5391,3203.4839 582.9982,865.094" + id="path3414-9" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 3523.1241,5416.3989 -582.9982,865.094" + id="path3414-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 10268.171,5416.6609 583,865.094" + id="path3414-9-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4939.6205,5416.3989 0,846.288" + id="path3414-8-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8816.5958,5442.9949 0,846.288" + id="path3414-8-3-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + id="g4504-3-9" + transform="translate(4866.0367,-16425.339)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16888.277" + x="4344.877" + xml:space="preserve"><tspan + id="tspan3104-5-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">End of</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0" + y="17119.1" + x="4578.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17119.1" + x="4578.7886" + id="tspan3112-5-9" + sodipodi:role="line">Last Grace</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3" + y="17350.271" + x="4581.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17350.271" + x="4581.7886" + id="tspan3116-2-6" + sodipodi:role="line">Period</tspan></text> + </g> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-5" + d="m 8546.5914,605.78414 -1595.7755,0" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send-36)" /> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-2.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-2.svg new file mode 100644 index 0000000000..4d956a7326 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-2.svg @@ -0,0 +1,656 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="1037.9602" + height="666.38184" + viewBox="-44 -44 13802.928 8857.5401" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-gp-init-2.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="false" + inkscape:zoom="0.79710462" + inkscape:cx="564.27119" + inkscape:cy="397.32188" + inkscape:window-x="833" + inkscape:window-y="28" + inkscape:window-maximized="0" + inkscape:current-layer="svg2" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5" /> + <path + sodipodi:nodetypes="cccccccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3" + d="m 6861.6904,46.438525 -2.8276,1315.668775 -5343.8436,17.1194 -2.8276,6561.7446 2039.0799,17.963 -2.7042,-2144.1399 -491.6705,-0.2109 -2.7042,-1993.6887 1487.7179,-4.7279 -17.8,1812.453 2017.2374,-7.6434 4.9532,-2151.5723 -1405.5264,11.163 -10.919,-1891.1468 1739.2164,-2.7175 -13.2006,4234.2295 -1701.3595,1.3953 -8.7841,2107.7116 1702.6392,-4.8334 33.4144,-1867.7167 1312.2492,12.9229 14.608,1818.3367 2000.0063,20.4217 -12.279,-1841.4113 1304.168,1.6154 -12.279,2032.7059 -4638.6515,1.6154 19.5828,569.0378" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <rect + ry="0" + id="rect118" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + rx="0" + height="7653.1299" + width="13639.945" + y="555.69745" + x="37.490929" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="799.34259" + x="134.46091" + xml:space="preserve">rcu_gp_init()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2311.1375,-10650.009)" + id="g3147"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(3162.2182,-10686.376)" + id="g3153"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0">Leaf</tspan></text> + </g> + <g + transform="translate(-1661.3439,-10650.009)" + id="g3147-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5398.415" + y="15310.093" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinit</text> + <text + xml:space="preserve" + x="5398.415" + y="15545.01" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-5-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinitnext</text> + </g> + <g + transform="translate(-170.52359,-10686.376)" + id="g3153-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9">Leaf</tspan></text> + </g> + <g + transform="translate(-3503.2651,-10686.376)" + id="g3153-20" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92">Leaf</tspan></text> + </g> + <g + transform="translate(-6836.0062,-10686.376)" + id="g3153-28" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1">Leaf</tspan></text> + <text + xml:space="preserve" + x="7699.7246" + y="17734.791" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-4" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinit</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812908px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5454.9508,3195.9607 -582.9982,865.094" + id="path3414" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8263.7327,3196.2227 582.9982,865.094" + id="path3414-9" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 3504.3177,5409.1377 -582.9982,865.094" + id="path3414-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 10249.365,5409.3997 583,865.094" + id="path3414-9-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4920.8141,5409.1377 0,846.288" + id="path3414-8-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8797.7894,5435.7337 0,846.288" + id="path3414-8-3-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <rect + ry="0" + id="rect118-1" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057923, 60.00115846;stroke-dashoffset:0" + rx="0" + height="4418.4302" + width="4932.5845" + y="1492.2119" + x="2087.8708" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="1690.4336" + x="2223.3145" + xml:space="preserve" + sodipodi:linespacing="125%">rcu_init_new_rnp()<tspan + style="font-size:192px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3307"> or</tspan></text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="1958.5066" + x="2223.3145" + xml:space="preserve">rcu_cleanup_dead_rnp()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-6" + font-size="192" + font-weight="bold" + font-style="normal" + y="2227.4531" + x="2226.1592" + xml:space="preserve" + sodipodi:linespacing="125%"><tspan + style="font-size:192px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3327">(optional)</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2431.6011,-10686.376)" + id="g3188"> + <text + xml:space="preserve" + x="3305.5364" + y="13255.592" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->qsmaskinit</text> + <g + id="g3107" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Root</tspan></text> + <text + xml:space="preserve" + x="3305.5364" + y="13490.509" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinitnext</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-3.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-3.svg new file mode 100644 index 0000000000..d24d7d555d --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp-init-3.svg @@ -0,0 +1,636 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="1039.3743" + height="594.19171" + viewBox="-44 -44 13821.733 7897.9895" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-gp-init-3.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="0.68224756" + inkscape:cx="617.89019" + inkscape:cy="625.84293" + inkscape:window-x="54" + inkscape:window-y="28" + inkscape:window-maximized="0" + inkscape:current-layer="g3153" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5"> + <inkscape:grid + type="xygrid" + id="grid3090" /> + </sodipodi:namedview> + <path + sodipodi:nodetypes="cccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3" + d="m 6899.3032,45.520244 -2.8276,2480.757056 -2316.0141,-1.687 -2.8276,2179.8547 2321.1758,-0.8434 -2.7042,-1843.2376 2404.5142,-0.2109 16.1022,1993.2669 -7783.8345,-4.7279 -16.7936,2120.3946 2033.1033,-23.5344 2.0128,-1866.561 2051.9097,14.0785 2.0128,1838.2987 1280.8475,-4.728 14.608,-1830.1039 1312.2492,12.9229 14.608,1818.3367 2000.0059,20.4217 -12.279,-1841.4113 1304.168,1.6154 -12.279,2032.7059 -4638.6511,1.6154 19.5828,569.0378" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2450.4075,-11647.329)" + id="g3188"> + <text + xml:space="preserve" + x="3145.9592" + y="13255.592" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->gp_seq = rsp->gp_seq</text> + <g + id="g3107" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Root</tspan></text> + </g> + <rect + ry="0" + id="rect118" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + rx="0" + height="6844.4546" + width="13658.751" + y="403.41983" + x="37.490932" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="662.8739" + x="153.26733" + xml:space="preserve">rcu_gp_init()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2329.9439,-11610.962)" + id="g3147"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5253.6904" + y="15407.032" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(3181.0246,-11647.329)" + id="g3153"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0">Leaf</tspan></text> + <text + xml:space="preserve" + x="7415.4365" + y="17670.572" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-9" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + transform="translate(-1642.5375,-11610.962)" + id="g3147-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5258.0688" + y="15412.313" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-3" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + transform="translate(-151.71726,-11647.329)" + id="g3153-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9">Leaf</tspan></text> + </g> + <g + transform="translate(-3484.4587,-11647.329)" + id="g3153-20" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92">Leaf</tspan></text> + <text + xml:space="preserve" + x="7405.2607" + y="17670.572" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-35" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + transform="translate(-6817.1998,-11647.329)" + id="g3153-28" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1">Leaf</tspan></text> + <text + xml:space="preserve" + x="7413.4688" + y="17670.566" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-75" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812908px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5473.7572,2235.0081 -582.9982,865.094" + id="path3414" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8282.5391,2235.2701 582.9982,865.094" + id="path3414-9" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 3523.1241,4448.1851 -582.9982,865.094" + id="path3414-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 10268.171,4448.4471 583,865.094" + id="path3414-9-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4939.6205,4448.1851 0,846.288" + id="path3414-8-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8816.5958,4474.7811 0,846.288" + id="path3414-8-3-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + x="7271.9297" + y="6023.2412" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-62" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp.svg new file mode 100644 index 0000000000..069f6f8371 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-gp.svg @@ -0,0 +1,5144 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="1626.5841" + height="6394.5298" + viewBox="-44 -44 21630.525 84996.019" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-gp.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36" + style="overflow:visible"> + <path + id="path3940-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-6" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3085" + style="overflow:visible"> + <path + id="path3087" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3089" + style="overflow:visible"> + <path + id="path3091" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3093" + style="overflow:visible"> + <path + id="path3095" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3097" + style="overflow:visible"> + <path + id="path3099" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3101" + style="overflow:visible"> + <path + id="path3103" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-7" + style="overflow:visible"> + <path + id="path3940-5" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-79" + style="overflow:visible"> + <path + id="path3940-20" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-37" + style="overflow:visible"> + <path + id="path3946-5" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3081" + style="overflow:visible"> + <path + id="path3083" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3085-9" + style="overflow:visible"> + <path + id="path3087-2" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3089-2" + style="overflow:visible"> + <path + id="path3091-8" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3093-9" + style="overflow:visible"> + <path + id="path3095-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3097-3" + style="overflow:visible"> + <path + id="path3099-6" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-12" + style="overflow:visible"> + <path + id="path3940-93" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-2" + style="overflow:visible"> + <path + id="path3946-66" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3077" + style="overflow:visible"> + <path + id="path3079" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3081-4" + style="overflow:visible"> + <path + id="path3083-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3085-5" + style="overflow:visible"> + <path + id="path3087-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3089-4" + style="overflow:visible"> + <path + id="path3091-87" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3093-1" + style="overflow:visible"> + <path + id="path3095-72" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-72" + style="overflow:visible"> + <path + id="path3940-26" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-6" + style="overflow:visible"> + <path + id="path3940-25" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-8" + style="overflow:visible"> + <path + id="path3946-62" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3179" + style="overflow:visible"> + <path + id="path3181" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3183" + style="overflow:visible"> + <path + id="path3185" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3187" + style="overflow:visible"> + <path + id="path3189" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3191" + style="overflow:visible"> + <path + id="path3193" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3195" + style="overflow:visible"> + <path + id="path3197" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3199" + style="overflow:visible"> + <path + id="path3201" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3203" + style="overflow:visible"> + <path + id="path3205" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3207" + style="overflow:visible"> + <path + id="path3209" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3211" + style="overflow:visible"> + <path + id="path3213" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3215" + style="overflow:visible"> + <path + id="path3217" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-5" + style="overflow:visible"> + <path + id="path3940-52" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3150" + style="overflow:visible"> + <path + id="path3152" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-9" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3156" + style="overflow:visible"> + <path + id="path3158" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3160" + style="overflow:visible"> + <path + id="path3162" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3164" + style="overflow:visible"> + <path + id="path3166" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3168" + style="overflow:visible"> + <path + id="path3170" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3172" + style="overflow:visible"> + <path + id="path3174" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-8" + style="overflow:visible"> + <path + id="path3940-7-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-17" + style="overflow:visible"> + <path + id="path3940-8" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36-4" + style="overflow:visible"> + <path + id="path3940-7-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-94" + style="overflow:visible"> + <path + id="path3946-59" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3157" + style="overflow:visible"> + <path + id="path3159" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3161" + style="overflow:visible"> + <path + id="path3163" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3165" + style="overflow:visible"> + <path + id="path3167" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3169" + style="overflow:visible"> + <path + id="path3171" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3173" + style="overflow:visible"> + <path + id="path3175" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3177" + style="overflow:visible"> + <path + id="path3179" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3181" + style="overflow:visible"> + <path + id="path3183" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3185" + style="overflow:visible"> + <path + id="path3187" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3189" + style="overflow:visible"> + <path + id="path3191" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3193" + style="overflow:visible"> + <path + id="path3195" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3197" + style="overflow:visible"> + <path + id="path3199" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-35" + style="overflow:visible"> + <path + id="path3940-70" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3203-8" + style="overflow:visible"> + <path + id="path3205-1" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-83" + style="overflow:visible"> + <path + id="path3940-79" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3038" + style="overflow:visible"> + <path + id="path3040" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="marker3042" + style="overflow:visible"> + <path + id="path3044" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="0.81932583" + inkscape:cx="840.45848" + inkscape:cy="5052.4242" + inkscape:window-x="787" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="g4" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5"> + <inkscape:grid + type="xygrid" + id="grid3079" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="413.99932px" + originy="5758.0031px" /> + </sodipodi:namedview> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(4751.9713,-1307.071)"> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,2411.7612 0,6117.1391" + id="path3134-9-0-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,3342.6302 -3856.4573,0 10.6979,5757.1962 2918.1436,-2e-4" + id="path3134-9-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 6161.6776,3342.6302 3856.4574,0 -12.188,5757.1963 -2918.1436,-3e-4" + id="path3134-9-0-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5710 5790--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4512 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1040 9300 - 1502 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2240 8100 - 2702 5940--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1350 3450 - 2444 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4950 3450 - 3854 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 6600 - 4050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 6600 - 1050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 5400 - 2250 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 8100 - 2250 6240--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 9300 - 1050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5250 6240--> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9300 3150 - 10860 3150--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 3600 - 11400 4410--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 5100 - 11400 5910--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9900 4650 - 10860 4650--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9600 6150 - 10860 6150--> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 5400 - 5250 4290--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <rect + x="4544.7305" + y="4603.417" + width="3240.0088" + height="2650.6289" + rx="0" + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + id="rect118" + ry="0" /> + <text + xml:space="preserve" + x="5073.3374" + y="6372.4521" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">rcu_accelerate_cbs()</text> + <g + id="g3107" + transform="translate(2715.7065,4700.8888)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="4773.3452" + y="4825.2578" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_prepare_for_idle()</text> + <rect + x="790.93585" + y="4630.8252" + width="3240.0088" + height="2650.6289" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.0005789, 60.00115781;stroke-dashoffset:0" + id="rect118-3" + ry="0" /> + <text + xml:space="preserve" + x="1319.5447" + y="6639.2261" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_accelerate_cbs()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-7" + transform="translate(-1038.0776,4728.2971)"> + <rect + id="rect112-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="1019.5512" + y="4852.666" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">note_gp_changes()</text> + <text + xml:space="preserve" + x="1319.5447" + y="6376.6328" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_advance_cbs()</text> + <text + xml:space="preserve" + x="1340.6649" + y="6111.4473" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-2" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">__note_gp_changes()</text> + <rect + x="5422.6279" + y="3041.8311" + width="1480.4871" + height="379.24637" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.0005789, 60.00115794;stroke-dashoffset:0" + id="rect118-3-9" + ry="0" /> + <text + xml:space="preserve" + x="5607.2734" + y="3283.3892" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">call_rcu()</text> + <path + sodipodi:type="arc" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + id="path3084" + sodipodi:cx="319.379" + sodipodi:cy="345.54001" + sodipodi:rx="65.917107" + sodipodi:ry="39.550262" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + transform="matrix(13.298129,0,0,13.298129,1915.7286,4523.6528)" /> + <text + xml:space="preserve" + x="5853.9238" + y="8902.3623" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104">Wake up</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6165.7158" + y="9122.8174" + id="text3110" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3112" + x="6165.7158" + y="9122.8174">grace-period</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6162.8716" + y="9364.3564" + id="text3114" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3116" + x="6162.8716" + y="9364.3564">kernel thread</tspan></text> + <rect + x="8239.8516" + y="4608.7363" + width="3240.0088" + height="2650.6289" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057902, 60.00115804;stroke-dashoffset:0" + id="rect118-36" + ry="0" /> + <text + xml:space="preserve" + x="8768.4678" + y="6484.1562" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-75" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_accelerate_cbs()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-3" + transform="translate(6410.833,4706.2127)"> + <rect + id="rect112-56" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="8329.5352" + y="4830.5771" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">takedown_cpu()</text> + <text + xml:space="preserve" + x="8335.4873" + y="5094.127" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcutree_migrate_callbacks()</text> + <text + xml:space="preserve" + x="8335.4873" + y="5357.1006" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_migrate_callbacks()</text> + <text + xml:space="preserve" + x="8768.4678" + y="6224.9038" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_advance_cbs()</text> + <text + xml:space="preserve" + x="3467.9963" + y="6987.9912" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6">Leaf</tspan></text> + <text + xml:space="preserve" + x="7220.106" + y="6961.395" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Leaf</tspan></text> + <text + xml:space="preserve" + x="10905.331" + y="6961.395" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-5">Leaf</tspan></text> + <path + sodipodi:type="arc" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + id="path3084-3" + sodipodi:cx="319.379" + sodipodi:cy="345.54001" + sodipodi:rx="65.917107" + sodipodi:ry="39.550262" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + transform="matrix(13.298129,0,0,13.298129,1872.6808,-2726.4833)" /> + <text + xml:space="preserve" + x="5717.4517" + y="1785.2073" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-7">Phase One</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6119.668" + y="2005.6624" + id="text3110-5" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3112-3" + x="6119.668" + y="2005.6624">of Update</tspan></text> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-3" + d="m 6169.6477,11384.719 0,8777.145" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1749.0282,658.72243)" + id="g3188"> + <g + id="g3107-62" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-1" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-2" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-7">Root</tspan></text> + <text + xml:space="preserve" + x="3137.9988" + y="13271.316" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-626" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3071">rcu_seq_start(rsp->gp_seq)</tspan></text> + </g> + <rect + ry="0" + id="rect118-0" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057845, 60.00115689;stroke-dashoffset:0" + rx="0" + height="23612.516" + width="13607.611" + y="12709.474" + x="-663.88806" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-93" + font-size="192" + font-weight="bold" + font-style="normal" + y="12968.928" + x="-548.11169" + xml:space="preserve">rcu_gp_init()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1628.5648,695.08943)" + id="g3147"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2479.6454,658.72243)" + id="g3153"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0">Leaf</tspan></text> + </g> + <g + transform="translate(-2343.9166,695.08943)" + id="g3147-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + transform="translate(-853.09625,658.72243)" + id="g3153-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9">Leaf</tspan></text> + </g> + <g + transform="translate(-4185.8377,658.72243)" + id="g3153-20" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92">Leaf</tspan></text> + </g> + <g + transform="translate(-7518.5789,658.72243)" + id="g3153-28" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1">Leaf</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4772.378,14541.058 -582.9982,865.094" + id="path3414" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7581.1599,14541.32 582.9982,865.094" + id="path3414-9" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2821.7449,16754.235 -582.9982,865.094" + id="path3414-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 9566.7916,16754.497 583.0014,865.094" + id="path3414-9-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4238.2414,16754.235 0,846.288" + id="path3414-8-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8115.2166,16780.831 0,846.288" + id="path3414-8-3-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + id="g4504-3-9" + transform="translate(4164.6575,-5087.5013)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16888.277" + x="4344.877" + xml:space="preserve"><tspan + id="tspan3104-5-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">End of</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0" + y="17119.1" + x="4578.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17119.1" + x="4578.7886" + id="tspan3112-5-9" + sodipodi:role="line">Last Grace</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3" + y="17350.271" + x="4581.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17350.271" + x="4581.7886" + id="tspan3116-2-6" + sodipodi:role="line">Period</tspan></text> + </g> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-5" + d="m 7845.2122,11943.62 -1595.7756,0" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send-36)" /> + <path + sodipodi:type="arc" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + id="path3084-6" + sodipodi:cx="319.379" + sodipodi:cy="345.54001" + sodipodi:rx="65.917107" + sodipodi:ry="39.550262" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + transform="matrix(13.298129,0,0,13.298129,1915.7264,6279.0065)" /> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6165.6357" + y="10691.992" + id="text3110-0" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3112-6" + x="6165.6357" + y="10691.992">Grace-period</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6162.8696" + y="10947.994" + id="text3114-2" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3116-6" + x="6162.8696" + y="10947.994">kernel thread</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6165.3237" + y="11188.528" + id="text3114-1" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3116-8" + x="6165.3237" + y="11188.528">awakened</tspan></text> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-3-2" + d="m 6161.6774,9725.7319 0,531.9251" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="cccccccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1" + d="m 6169.1878,20208.525 -2.8277,1315.668 -5343.84363,17.12 -2.8276,6561.744 2039.08003,17.963 -2.7042,-2144.14 -491.6705,-0.211 -2.7042,-1993.689 1487.7179,-4.728 -17.7999,1812.453 2017.2372,-7.643 4.9533,-2151.572 -1405.5264,11.163 -10.9189,-1891.147 1739.2163,-2.718 -13.2006,4234.23 -1701.3596,1.395 -8.784,2107.712 1702.6392,-4.834 33.4144,-1867.716 1312.2491,12.923 14.608,1818.336 2000.0062,20.422 -12.279,-1841.411 1304.1668,1.615 -12.279,2032.706 -4638.6501,1.615 19.5828,569.038" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1618.635,9512.0768)" + id="g3147-7"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-8" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-4" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2469.7158,9475.7098)" + id="g3153-0"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-3" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-6" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-1" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-0" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-6">Leaf</tspan></text> + </g> + <g + transform="translate(-2353.8464,9512.0768)" + id="g3147-3-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6-2" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5398.415" + y="15310.093" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinit</text> + <text + xml:space="preserve" + x="5398.415" + y="15545.01" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-5-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinitnext</text> + </g> + <g + transform="translate(-863.02623,9475.7098)" + id="g3153-2-1" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6-5" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8-4" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9-6">Leaf</tspan></text> + </g> + <g + transform="translate(-4195.7676,9475.7098)" + id="g3153-20-5" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92-4">Leaf</tspan></text> + </g> + <g + transform="translate(-7528.5086,9475.7098)" + id="g3153-28-5" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3-4" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1-4">Leaf</tspan></text> + <text + xml:space="preserve" + x="7699.7246" + y="17734.791" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-4" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinit</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="M 4762.4482,23358.047 4179.45,24223.141" + id="path3414-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7571.23,23358.309 582.9982,865.094" + id="path3414-9-3" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2811.8152,25571.224 -582.9982,865.094" + id="path3414-8-0" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 9556.8622,25571.486 582.9988,865.094" + id="path3414-9-4-7" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4228.3115,25571.224 0,846.288" + id="path3414-8-3-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8105.2867,25597.82 0,846.288" + id="path3414-8-3-6-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <rect + ry="0" + id="rect118-1" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115756;stroke-dashoffset:0" + rx="0" + height="4418.4302" + width="4932.5845" + y="21654.297" + x="1395.3682" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="21852.52" + x="1530.812" + xml:space="preserve" + sodipodi:linespacing="125%">rcu_init_new_rnp()<tspan + style="font-size:192px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3307"> or</tspan></text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="22120.592" + x="1530.812" + xml:space="preserve">rcu_cleanup_dead_rnp()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-6" + font-size="192" + font-weight="bold" + font-style="normal" + y="22389.539" + x="1533.6567" + xml:space="preserve" + sodipodi:linespacing="125%"><tspan + style="font-size:192px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3327">(optional)</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1739.0986,9475.7098)" + id="g3188-8"> + <text + xml:space="preserve" + x="3305.5364" + y="13255.592" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-84" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->qsmaskinit</text> + <g + id="g3107-31" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112-4" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-9" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-20" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6">Root</tspan></text> + <text + xml:space="preserve" + x="3305.5364" + y="13490.509" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-5-89" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinitnext</text> + </g> + <path + sodipodi:nodetypes="cccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-10" + d="m 6187.9943,28881.474 -2.8275,2480.757 -2316.0141,-1.687 -2.8276,2179.854 2321.1757,-0.843 -2.7041,-1843.237 2404.5141,-0.212 16.1022,1993.267 -7783.83443,-4.728 -16.7937,2120.395 2033.10343,-23.534 2.0128,-1866.562 2051.9098,14.079 2.0128,1838.299 1280.8474,-4.728 14.608,-1830.104 1312.2492,12.923 14.608,1818.336 2000.0057,20.422 -12.279,-1841.411 1304.167,1.615 -12.279,2032.706 -4638.6499,1.615 19.5828,569.038" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1739.0986,17188.625)" + id="g3188-6"> + <g + id="g3107-5" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112-94" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-90" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-9" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-1">Root</tspan></text> + <text + xml:space="preserve" + x="3147.9268" + y="13240.524" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-1" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1618.6352,17224.992)" + id="g3147-1"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-1" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-9" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5263.1094" + y="15411.646" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-92" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2469.7158,17188.625)" + id="g3153-7"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-67" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-36" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-63" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-94">Leaf</tspan></text> + <text + xml:space="preserve" + x="7417.4053" + y="17655.502" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-759" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + transform="translate(-2353.8462,17224.992)" + id="g3147-3-8" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6-1" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0-2" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6-9" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5246.1548" + y="15411.648" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-87" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + transform="translate(-863.02613,17188.625)" + id="g3153-2-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7-8" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9-5">Leaf</tspan></text> + </g> + <g + transform="translate(-4195.7673,17188.625)" + id="g3153-20-0" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3-6" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7-38" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92-6">Leaf</tspan></text> + <text + xml:space="preserve" + x="7433.8257" + y="17682.098" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-2" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <g + transform="translate(-7528.5085,17188.625)" + id="g3153-28-1" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9-1" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7-59" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6-4" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1-8">Leaf</tspan></text> + <text + xml:space="preserve" + x="7415.4404" + y="17682.098" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4762.4484,31070.961 -582.9982,865.095" + id="path3414-0" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7571.2303,31071.223 582.9982,865.095" + id="path3414-9-30" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2811.8153,33284.138 -582.9982,865.094" + id="path3414-8-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 9556.862,33284.401 582.999,865.093" + id="path3414-9-4-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4228.3118,33284.138 0,846.288" + id="path3414-8-3-4" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8105.287,33310.734 0,846.288" + id="path3414-8-3-6-4" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-8" + d="m 11248.729,43927.515 3383.749,-0.843 7.995,1860.989" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3" + d="m 14641.723,41609.377 -2.828,1541.346 -3303.353,-1.688" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-6" + d="m 816.24399,43920.114 -3929.12029,17.964 20.2152,2632.051" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3-2" + d="m -3122.1199,40492.4 12.2312,2669.729 3867.53038,7.717" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="cccccccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-4" + d="m 6180.0812,36613.063 -2.827,638.638 -5325.0381,35.926 -9.78989,7279.202 2659.62569,0 0,-2260.682 -1196.8316,0 0,-1861.738 1462.7942,0 0,2127.7 3723.476,0 0,1861.738 2035.5457,-11.246 -12.28,-1788.219 1191.3338,1.616 15.928,1289.854 520.347,0.202 m 0,0 -15.641,-1570.133 -2629.7318,-18.604 3.165,-2124.92 -2305.4983,-7.354 0,-2287.279 5319.2511,0 0,7180.99 m 0,0 0,19229.094 -4441.5746,0" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <rect + ry="0" + id="rect118-7" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + rx="0" + height="8254.9336" + width="14128.912" + y="37009.492" + x="-719.34235" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-24" + font-size="192" + font-weight="bold" + font-style="normal" + y="37286.184" + x="-573.74298" + xml:space="preserve">rcu_gp_fqs()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1629.528,25916.616)" + id="g3147-0"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-62" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-90" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5250.5327" + y="15512.733" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-35-8" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2480.6088,25880.249)" + id="g3153-1"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-31" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-10" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-34" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-03" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-91">Leaf</tspan></text> + </g> + <g + transform="translate(-2342.9531,25916.616)" + id="g3147-3-9" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5284.6885" + y="15500.379" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-3" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <g + transform="translate(-852.13285,25880.249)" + id="g3153-2-8" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6-0" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1-56" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7-4" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9-0">Leaf</tspan></text> + </g> + <g + transform="translate(-4184.8743,25880.249)" + id="g3153-20-04" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2-62" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3-67" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92-9">Leaf</tspan></text> + </g> + <g + transform="translate(-7517.6112,25880.249)" + id="g3153-28-8" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9-7" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7-2" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3-82" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6-9" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1-9">Leaf</tspan></text> + <text + xml:space="preserve" + x="7428.2939" + y="17707.271" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-75-6" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4773.3421,39762.585 -582.9986,865.094" + id="path3414-02" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7582.1232,39762.847 582.999,865.094" + id="path3414-9-7" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2822.7083,41975.762 -582.9982,865.094" + id="path3414-8-6" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 9567.7542,41976.024 583.0018,865.094" + id="path3414-9-4-1" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4239.2048,41975.762 0,846.288" + id="path3414-8-3-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8116.1802,42002.358 0,846.288" + id="path3414-8-3-6-2" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <rect + ry="0" + id="rect118-1-1" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057924, 60.00115835;stroke-dashoffset:0" + rx="0" + height="7164.1621" + width="13301.43" + y="37551.07" + x="-474.37598" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-5" + font-size="192" + font-weight="bold" + font-style="normal" + y="37802.488" + x="-342.01831" + xml:space="preserve" + sodipodi:linespacing="125%">force_qs_rnp()<tspan + style="font-size:192px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3307-9" /></text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-9" + font-size="192" + font-weight="bold" + font-style="normal" + y="38114.047" + x="-334.33856" + xml:space="preserve">dyntick_save_progress_counter()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1749.9916,25880.249)" + id="g3188-1"> + <g + id="g3107-4" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112-91" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-58">Root</tspan></text> + <text + xml:space="preserve" + x="3158.8521" + y="13313.027" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-70" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="38425.035" + x="-337.79462" + xml:space="preserve">rcu_implicit_dynticks_qs()</text> + <text + xml:space="preserve" + x="9907.8887" + y="43568.723" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-62-4" + style="font-size:192.00001526px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + <g + id="g4504" + transform="translate(10024.106,24062.466)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3089" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-80" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-4" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-29" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-61" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-04" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-22" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3148-9-9" + transform="translate(9995.8972,46544.783)"> + <rect + x="3592.3828" + y="-4715.7246" + width="3164.783" + height="769.99048" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4418.6582" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_dynticks_eqs_enter()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4165.7954" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">atomic_add_return()</text> + </g> + <g + id="g3148-9-9-2" + transform="translate(9995.8972,49205.888)"> + <rect + x="3592.3828" + y="-4715.7246" + width="3164.783" + height="769.99048" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3-6" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4418.6582" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6-1" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_dynticks_eqs_exit()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4165.7954" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">atomic_add_return()</text> + </g> + <g + id="g4504-7" + transform="translate(10042.913,29290.642)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-9" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-0" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-2" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-3-2" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-7" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-5" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-6" + transform="translate(-7705.0623,22903.647)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-1" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-8" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-7-0" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-9" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-2" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-0" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3148-9-9-3" + transform="translate(-8306.8632,45879.159)"> + <rect + x="3592.3828" + y="-4981.6865" + width="3728.9751" + height="2265.0989" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3-7" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4684.6201" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_report_dead()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4431.7573" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0-9" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_cleanup_dying_idle_cpu()</text> + <g + transform="translate(1783.3183,-5255.3491)" + id="g3107-7-5" + style="fill:none;stroke-width:0.025in"> + <rect + x="2084.55" + y="949.37109" + width="2809.1992" + height="1370.8721" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-5-3" /> + <rect + x="2084.55" + y="1025.3964" + width="2809.1992" + height="1294.8468" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-3-3-5" /> + </g> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-6-6-2-6" + font-size="192" + font-weight="bold" + font-style="normal" + y="-3526.4448" + x="4241.8574" + xml:space="preserve">->qsmaskinitnext</text> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-3-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="-2987.4167" + x="6305.1484" + xml:space="preserve"><tspan + id="tspan3104-6-9" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Leaf</tspan></text> + </g> + <g + id="g4504-7-2" + transform="translate(-7686.2563,30073.332)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-9-2" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-2-8" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-0-9" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-2-7" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-3-3" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-7-6" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-5-1" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3206" + transform="translate(-752.44253,40565.329)"> + <rect + ry="0" + id="rect118-3-5-1-3-1" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00058007, 60.00116001;stroke-dashoffset:0" + rx="0" + height="2265.0989" + width="3728.9751" + y="3382.2036" + x="-3958.3845" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27-6-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="3679.27" + x="-3804.9949" + xml:space="preserve">rcu_cpu_starting()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-7-5-0" + transform="translate(-5767.4491,3108.5424)"> + <rect + id="rect112-5-3-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-3-5-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="-3308.9099" + y="4837.4453" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-2-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinitnext</text> + <text + xml:space="preserve" + x="-1245.6189" + y="5376.4731" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-2-0" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-9-6">Leaf</tspan></text> + </g> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3-6" + d="m 10723.215,43926.861 467.335,8.625" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send-8)" + d="m 4431.0572,60276.11 16.472,2346.582" + id="path3134-9-0-3-1-9-9" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(-59.697399,41012.242)" + id="g3188-83"> + <text + xml:space="preserve" + x="3172.5554" + y="13255.592" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-80" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->qsmask &= ~->grpmask</text> + <g + id="g3107-40" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112-919" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-25" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-4">Root</tspan></text> + </g> + <rect + ry="0" + id="rect118-4" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057845, 60.00115689;stroke-dashoffset:0" + rx="0" + height="7164.1641" + width="13639.945" + y="52743.297" + x="-2453.8081" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-99" + font-size="192" + font-weight="bold" + font-style="normal" + y="52950.113" + x="-2356.8381" + xml:space="preserve">rcu_report_rnp()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(-180.16099,41048.609)" + id="g3147-36"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-0" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-50" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-29" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(670.91971,41012.242)" + id="g3153-4"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-35" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-17" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-4" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-14">Leaf</tspan></text> + </g> + <g + transform="translate(-4152.6419,41048.609)" + id="g3147-3-6" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6-9" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0-4" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5284.9155" + y="15386.685" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-3-2" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <g + transform="translate(-2661.8217,41012.242)" + id="g3153-2-6" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6-4" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7-88" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9-9">Leaf</tspan></text> + </g> + <g + transform="translate(-5994.5632,41012.242)" + id="g3153-20-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2-8" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3-8" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5-68" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92-3">Leaf</tspan></text> + </g> + <g + transform="translate(-9327.3041,41012.242)" + id="g3153-28-83" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9-3" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3-80" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6-47" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1-6">Leaf</tspan></text> + <text + xml:space="preserve" + x="7422.3945" + y="17661.012" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-67" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2963.6526,54894.579 -582.9982,865.092" + id="path3414-89" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5772.4344,54894.841 582.9982,865.092" + id="path3414-9-0" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 1013.0193,57107.754 -582.99819,865.094" + id="path3414-8-68" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7758.0666,57108.016 583,865.094" + id="path3414-9-4-79" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2429.5159,57107.754 0,846.288" + id="path3414-8-3-0" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 6306.4911,57134.35 0,846.288" + id="path3414-8-3-6-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + sodipodi:nodetypes="cccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-33" + d="m 4421.0737,51833.378 -2.8276,1315.669 -5343.84362,17.119 -2.8276,6561.745 2039.08002,17.963 -2.7043,-2144.141 -491.67069,-0.211 -2.7042,-1993.689 1487.71819,-4.728 -17.8001,1812.453 2017.2374,-7.643 4.9532,-2151.571 -1405.5263,11.162 -10.9191,-1891.146 1739.2165,-2.718 0.1197,7086.03" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 4432.9209,44194.481 8.8008,4666.688 -2616.9163,17.119 15.9788,1446.406 2603.2718,-0.843 -29.6181,2086.665" + id="path3134-9-0-3-1-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccccc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:none" + d="m 4423.9777,48861.171 2616.9159,17.119 -15.979,1465.213 -2584.4649,-19.65" + id="path3134-9-0-3-1-9" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <g + transform="translate(-1706.1312,54634.242)" + id="g3115"> + <rect + x="4485.6865" + y="-8571.0352" + width="3296.428" + height="2199.2754" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057923, 60.00115859;stroke-dashoffset:0" + id="rect118-3-3" + ry="0" /> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-7-2" + transform="translate(2656.673,-8952.2968)"> + <rect + id="rect112-5-6" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-3-52" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="4714.3018" + y="-8349.1943" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">note_gp_changes()</text> + <text + xml:space="preserve" + x="5014.2954" + y="-7170.978" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rdp->gp_seq</text> + <text + xml:space="preserve" + x="5035.4155" + y="-7436.1636" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-2-8" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">__note_gp_changes()</text> + <text + xml:space="preserve" + x="7162.7471" + y="-6692.6006" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-79" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-6">Leaf</tspan></text> + </g> + <g + transform="translate(-3299.9731,54048.57)" + id="g3148"> + <rect + ry="0" + id="rect118-3-5" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="412.66794" + width="3240.0085" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="3745.7725" + xml:space="preserve">rcu_note_context_switch()</text> + </g> + <g + transform="translate(1881.1886,54048.57)" + id="g3148-5"> + <rect + ry="0" + id="rect118-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="412.66794" + width="3240.0085" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="3745.7725" + xml:space="preserve">rcu_sched_clock_irq()</text> + </g> + <g + transform="translate(-850.30204,55463.106)" + id="g3148-9"> + <rect + ry="0" + id="rect118-3-5-1" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="864.02148" + width="3540.9114" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="3745.7725" + xml:space="preserve">rcu_core()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27-0" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4165.7954" + x="3745.7725" + xml:space="preserve">rcu_check_quiescent_state()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27-0-9" + font-size="192" + font-weight="bold" + font-style="normal" + y="-3914.085" + x="3745.7725" + xml:space="preserve">rcu__report_qs_rdp())</text> + </g> + <g + id="g4504-3" + transform="translate(3886.2577,30763.697)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-0" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2-4" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-3-9-1" + transform="translate(3886.2577,34216.283)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1-0" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2-4" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5-7-8" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0-7" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5-9-0" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3-8" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2-6-6" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-3-0" + transform="translate(-4075.0211,30763.697)"> + <path + transform="matrix(13.298129,0,0,13.298129,228.84485,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-6" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-26" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5-1" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-8" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5-7" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-9" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2-2" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-3-9-0" + transform="translate(-4181.4064,34216.283)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1-2" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2-3" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5-7-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0-5" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5-9-9" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3-2" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2-6-2" + sodipodi:role="line">critical section</tspan></text> + </g> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:none" + d="m 8448.9566,48370.097 0,2393.663" + id="path3134-9-0-3-1-9-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:none" + d="m 390.28991,48370.097 0,2393.663" + id="path3134-9-0-3-1-9-8-9" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + id="g4504-2" + transform="translate(-143.72569,46137.076)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-4" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-79" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4273.4326" + xml:space="preserve"><tspan + id="tspan3104-3" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Wake up</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-92" + y="17055.541" + x="4585.2246" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4585.2246" + id="tspan3112-8" + sodipodi:role="line">grace-period</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-3" + y="17297.08" + x="4582.3804" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4582.3804" + id="tspan3116-0" + sodipodi:role="line">kernel thread</tspan></text> + </g> + <g + transform="translate(-707.64089,66256.889)" + id="g3148-2"> + <rect + ry="0" + id="rect118-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="412.66794" + width="3240.0085" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-8" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="4064.9268" + xml:space="preserve">rcu_report_qs_rsp()</text> + </g> + <path + sodipodi:type="arc" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + id="path3084-6-9" + sodipodi:cx="319.379" + sodipodi:cy="345.54001" + sodipodi:rx="65.917107" + sodipodi:ry="39.550262" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + transform="matrix(13.298129,0,0,13.298129,2044.7501,59781.881)" /> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6294.6587" + y="64194.863" + id="text3110-0-1" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3112-6-5" + x="6294.6587" + y="64194.863">Grace-period</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6291.8931" + y="64450.863" + id="text3114-2-4" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3116-6-9" + x="6291.8931" + y="64450.863">kernel thread</tspan></text> + <text + xml:space="preserve" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + x="6294.3472" + y="64691.398" + id="text3114-1-2" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan3116-8-5" + x="6294.3472" + y="64691.398">awakened</tspan></text> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-3-2-7" + d="m 5310.5974,63210.805 984.0615,0 -3.9578,549.726" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="cccccccccccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-99" + d="m 6322.9337,64896.388 -2.8276,2480.757 -2316.0141,-1.687 -2.8276,2179.855 2321.1758,-0.844 -2.7042,-1843.237 2404.5142,-0.212 16.1023,1993.267 -7783.83452,-4.728 -16.79346,2120.395 2033.10318,-23.535 2.0128,-1866.561 2051.9096,14.08 2.0128,1838.298 1280.8474,-4.728 14.6081,-1830.105 1312.2491,12.923 14.608,1818.337 2000.0093,20.422 -12.279,-1841.412 1304.1722,1.616 -12.279,2032.706 -4638.6586,1.616 19.5827,569.037" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1874.038,53203.538)" + id="g3188-7"> + <g + id="g3107-53" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112-49" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-02" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-0" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-19">Root</tspan></text> + <text + xml:space="preserve" + x="3175.896" + y="13240.11" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-3" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <rect + ry="0" + id="rect118-6" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057845, 60.00115689;stroke-dashoffset:0" + rx="0" + height="14649.609" + width="13482.601" + y="65254.539" + x="-538.87689" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-21" + font-size="192" + font-weight="bold" + font-style="normal" + y="65513.996" + x="-423.10056" + xml:space="preserve">rcu_gp_cleanup()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1753.5744,53239.905)" + id="g3147-2"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-07" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-1" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5264.4829" + y="15411.231" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-7" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-5">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-1" + transform="translate(7817.6676,69212.346)"> + <rect + id="rect112-7-1-90" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-56" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="12322.059" + y="71472.641" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-77" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-4">Leaf</tspan></text> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-9" + d="m 6315.6122,72629.054 -20.9533,8108.684 1648.968,0" + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-62-6" + transform="translate(2814.6217,72520.234)"> + <rect + id="rect112-6" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-1-4" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="7319.022" + y="74780.406" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-8" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-7-7">Root</tspan></text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(1746.2528,60972.572)" + id="g3147-9"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-2" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-02" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-5" + transform="translate(7810.3459,76945.013)"> + <rect + id="rect112-7-1-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="12314.736" + y="79205.188" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-2" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-8">Leaf</tspan></text> + <g + transform="translate(-2226.2288,60972.572)" + id="g3147-3-7" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6-3" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0-6" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6-1" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + transform="translate(-735.4075,60936.205)" + id="g3153-2-9" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6-3" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1-1-4" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8-9" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7-4-8" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9-7">Leaf</tspan></text> + </g> + <g + transform="translate(-4068.1496,60936.205)" + id="g3153-20-8" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2-4" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7-0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92-6-5">Leaf</tspan></text> + </g> + <g + transform="translate(-7400.8907,60936.205)" + id="g3153-28-0" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7-3-8" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6-0" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1-6-2">Leaf</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4890.0661,74818.542 -582.9982,865.094" + id="path3414-5" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7698.8481,74818.804 582.998,865.094" + id="path3414-9-5" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2939.433,77031.719 -582.9982,865.094" + id="path3414-8-4-6" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 9684.4834,77031.981 583.0036,865.094" + id="path3414-9-4-7-0" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4355.9293,77031.719 0,846.288" + id="path3414-8-3-65" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8232.9046,77058.315 0,846.288" + id="path3414-8-3-6-6-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + transform="translate(-2218.9069,53239.905)" + id="g3147-3-64" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6-62" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0-8" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6-96" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5274.1216" + y="15411.231" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-6">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <g + transform="translate(-728.08545,53203.538)" + id="g3153-2-0" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6-7" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1-01" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8-0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7-1" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9-3">Leaf</tspan></text> + </g> + <g + transform="translate(-4060.8278,53203.538)" + id="g3153-20-7" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2-7" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3-2" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5-4" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92-5">Leaf</tspan></text> + <text + xml:space="preserve" + x="7435.1987" + y="17708.281" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-9" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-1">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <g + transform="translate(-7393.5687,53203.538)" + id="g3153-28-02" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3-9" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6-94" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1-5">Leaf</tspan></text> + <text + xml:space="preserve" + x="7416.8125" + y="17708.281" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-35" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-62">rcu_seq_end(&rnp->gp_seq)</tspan></text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4897.3878,67085.876 -582.9982,865.094" + id="path3414-03" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 7706.1695,67086.138 582.9982,865.094" + id="path3414-9-78" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 2946.7546,69299.053 -582.9981,865.094" + id="path3414-8-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 9691.8054,69299.315 583.0036,865.094" + id="path3414-9-4-6" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4363.251,69299.053 0,846.288" + id="path3414-8-3-04" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8240.2262,69325.649 0,846.288" + id="path3414-8-3-6-67" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4504-3-9-6" + transform="translate(4290.2512,63653.93)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1-09" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="16888.277" + x="4344.877" + xml:space="preserve"><tspan + id="tspan3104-5-7-5" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Start of</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0-9" + y="17119.1" + x="4578.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17119.1" + x="4578.7886" + id="tspan3112-5-9-7" + sodipodi:role="line">Next Grace</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3-85" + y="17350.271" + x="4581.7886" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17350.271" + x="4581.7886" + id="tspan3116-2-6-3" + sodipodi:role="line">Period</tspan></text> + </g> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 4406.3256,79248.348 -0.01,5813.579" + id="path3134-9-0-3-37" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 4406.3181,82402.301 -2393.663,0.512 0,1196.832 2393.663,-0.512" + id="path3134-9-0-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251251;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 4406.3181,82402.301 2393.6631,0.512 0,1196.832 -2393.6631,-0.512" + id="path3134-9-0-7-7" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <rect + x="578.16779" + y="82839.773" + width="2844.0972" + height="360.77411" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057845, 60.00115702;stroke-dashoffset:0" + id="rect118-3-4" + ry="0" /> + <text + xml:space="preserve" + x="806.7832" + y="83088.211" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-19" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_sched_clock_irq()</text> + <rect + x="5314.2671" + y="82817.688" + width="2975.115" + height="382.86298" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057858, 60.00115716;stroke-dashoffset:0" + id="rect118-36-0" + ry="0" /> + <text + xml:space="preserve" + x="5409.8989" + y="83063.711" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6-9" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_cleanup_after_idle()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-88" + font-size="192" + font-weight="bold" + font-style="normal" + y="81443.047" + x="3264.7983" + xml:space="preserve">rcu_advance_cbs()</text> + <rect + id="rect112-58" + style="fill:none;stroke:#000000;stroke-width:29.99999809;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="80561.273" + x="2991.7173" /> + <rect + id="rect112-3-4" + style="fill:none;stroke:#000000;stroke-width:29.99999809;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="80637.297" + x="2991.7173" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-3-7-37" + font-size="192" + font-weight="bold" + font-style="normal" + y="81872.406" + x="5411.5601" + xml:space="preserve"><tspan + id="tspan3104-6-5-13" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Leaf</tspan></text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-3-8" + font-size="192" + font-weight="bold" + font-style="normal" + y="81232.938" + x="3264.7983" + xml:space="preserve">__note_gp_changes()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3049" + transform="translate(-1728.7601,83820.41)"> + <path + transform="matrix(13.298129,0,0,13.298129,1872.6808,-2726.4833)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-3-0" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-6-9" + font-size="192" + font-weight="bold" + font-style="normal" + y="1785.2073" + x="5717.4517" + xml:space="preserve"><tspan + id="tspan3104-7-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Phase Two</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-5-9" + y="2005.6624" + x="6119.668" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="2005.6624" + x="6119.668" + id="tspan3112-3-9" + sodipodi:role="line">of Update</tspan></text> + </g> + <rect + x="3342.4805" + y="83998.438" + width="1994.7195" + height="664.90662" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057818, 60.00115636;stroke-dashoffset:0" + id="rect118-36-3" + ry="0" /> + <text + xml:space="preserve" + x="3608.4419" + y="84264.398" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">RCU_SOFTIRQ</text> + <text + xml:space="preserve" + x="3608.4419" + y="84530.367" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-9-6-6-7" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_do_batch()</text> + <text + xml:space="preserve" + x="6698.9019" + y="70885.211" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-2" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-7">rcu_seq_end(&rnp->gp_seq)</tspan></text> + <text + xml:space="preserve" + x="10023.457" + y="70885.234" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-9">rcu_seq_end(&rnp->gp_seq)</tspan></text> + <text + xml:space="preserve" + x="5023.3389" + y="74209.773" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-36-36" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier"><tspan + style="font-size:172.87567139px" + id="tspan3166-0">rcu_seq_end(&rsp->gp_seq)</tspan></text> + <text + xml:space="preserve" + x="6562.5884" + y="34870.727" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-3" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->gp_seq = rsp->gp_seq</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-hotplug.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-hotplug.svg new file mode 100644 index 0000000000..2c9310ba29 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-hotplug.svg @@ -0,0 +1,775 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="613.22784" + height="707.07056" + viewBox="-44 -44 8154.7829 9398.3736" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-hotplug.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36" + style="overflow:visible"> + <path + id="path3940-0" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-6" + style="overflow:visible"> + <path + id="path3940-26" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-8" + style="overflow:visible"> + <path + id="path3940-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-367" + style="overflow:visible"> + <path + id="path3940-5" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-56" + style="overflow:visible"> + <path + id="path3946-2" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3081" + style="overflow:visible"> + <path + id="path3083" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3085" + style="overflow:visible"> + <path + id="path3087" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3089" + style="overflow:visible"> + <path + id="path3091" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3093" + style="overflow:visible"> + <path + id="path3095" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker3097" + style="overflow:visible"> + <path + id="path3099" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-9" + style="overflow:visible"> + <path + id="path3940-1" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3675" + style="overflow:visible"> + <path + id="path3940-3" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1148" + id="namedview208" + showgrid="true" + inkscape:zoom="1.4142136" + inkscape:cx="325.41695" + inkscape:cy="364.94502" + inkscape:window-x="833" + inkscape:window-y="24" + inkscape:window-maximized="0" + inkscape:current-layer="svg2" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5" + inkscape:snap-global="false"> + <inkscape:grid + type="xygrid" + id="grid3154" + empspacing="5" + visible="true" + enabled="true" + snapvisiblegridlinesonly="true" + originx="65.610033px" + originy="-659.12429px" /> + </sodipodi:namedview> + <path + sodipodi:nodetypes="cc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3-5" + d="m 5749.1555,47.151064 2.828,9167.338436" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1" + d="m 5746.8844,5080.2018 -4107.7813,-0.8434 20.2152,2632.0511" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <path + sodipodi:nodetypes="ccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3-1-3" + d="m 1629.8595,1633.6804 12.2312,2669.7294 4055.5945,7.7159" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + id="g3115" + transform="translate(1657.6576,12154.29)"> + <rect + ry="0" + id="rect118-3" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057923, 60.00115859;stroke-dashoffset:0" + rx="0" + height="2349.7295" + width="3992.2642" + y="-8909.5498" + x="2379.3704" /> + <g + transform="translate(582.16224,-9085.2783)" + id="g3107-7" + style="fill:none;stroke-width:0.025in"> + <rect + x="2084.55" + y="949.37109" + width="2809.1992" + height="1370.8721" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-5" /> + <rect + x="2084.55" + y="1025.3964" + width="2809.1992" + height="1294.8468" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-3-3" /> + </g> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-6-6-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="-7356.375" + x="2774.7393" + xml:space="preserve">->qsmask &= ~->grpmask</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="-8652.5312" + x="2466.7822" + xml:space="preserve">dyntick_save_progress_counter()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-2-7-2-0" + font-size="192" + font-weight="bold" + font-style="normal" + y="-8368.1475" + x="2463.3262" + xml:space="preserve">rcu_implicit_dynticks_qs()</text> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-3" + font-size="192" + font-weight="bold" + font-style="normal" + y="-6817.3472" + x="5103.9922" + xml:space="preserve"><tspan + id="tspan3104-6" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Leaf</tspan></text> + </g> + <g + id="g4504" + transform="translate(-2953.0872,-15955.072)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3148-9-9" + transform="translate(-3554.8919,7020.44)"> + <rect + x="3592.3828" + y="-4981.6865" + width="3728.9751" + height="2265.0989" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + id="rect118-3-5-1-3" + ry="0" /> + <text + xml:space="preserve" + x="3745.7725" + y="-4684.6201" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_report_dead()</text> + <text + xml:space="preserve" + x="3745.7725" + y="-4431.7573" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-3-27-0-0" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_cleanup_dying_idle_cpu()</text> + <g + transform="translate(1783.3183,-5255.3491)" + id="g3107-7-5" + style="fill:none;stroke-width:0.025in"> + <rect + x="2084.55" + y="949.37109" + width="2809.1992" + height="1370.8721" + rx="0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-5-3" /> + <rect + x="2084.55" + y="1025.3964" + width="2809.1992" + height="1294.8468" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + id="rect112-3-3-5" /> + </g> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-6-6-2-6" + font-size="192" + font-weight="bold" + font-style="normal" + y="-3526.4448" + x="4241.8574" + xml:space="preserve">->qsmaskinitnext</text> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-3-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="-2987.4167" + x="6305.1484" + xml:space="preserve"><tspan + id="tspan3104-6-9" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Leaf</tspan></text> + </g> + <g + id="g4504-7" + transform="translate(-2934.2808,-8785.3871)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-9" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-0" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-2" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-3" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-7" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-5" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g3206" + transform="translate(3999.537,1706.6099)"> + <rect + ry="0" + id="rect118-3-5-1-3-1" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00058007, 60.00116001;stroke-dashoffset:0" + rx="0" + height="2265.0989" + width="3728.9751" + y="3382.2036" + x="-3958.3845" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27-6-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="3679.27" + x="-3804.9949" + xml:space="preserve">rcu_cpu_starting()</text> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-7-5-0" + transform="translate(-5767.4491,3108.5424)"> + <rect + id="rect112-5-3-9" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-3-5-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="-3308.9099" + y="4837.4453" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-2-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmaskinitnext</text> + <text + xml:space="preserve" + x="-1245.6189" + y="5376.4731" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-2-0" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-9-6">Leaf</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/TreeRCU-qs.svg b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-qs.svg new file mode 100644 index 0000000000..7d6c5f7e50 --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/TreeRCU-qs.svg @@ -0,0 +1,1095 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="1037.9601" + height="1373.2583" + viewBox="-44 -44 13802.927 18253.333" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="TreeRCU-qs.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send" + style="overflow:visible"> + <path + id="path3940" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutS" + orient="auto" + refY="0" + refX="0" + id="TriangleOutS" + style="overflow:visible"> + <path + id="path4073" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.2,0.2)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="TriangleOutM" + orient="auto" + refY="0" + refX="0" + id="TriangleOutM" + style="overflow:visible"> + <path + id="path4070" + d="m 5.77,0 -8.65,5 0,-10 8.65,5 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="scale(0.4,0.4)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend" + style="overflow:visible"> + <path + id="path3952" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3946" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Mend-7" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3952-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="scale(-0.6,-0.6)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-3" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-6" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-1" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-2" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-0" + style="overflow:visible"> + <path + inkscape:connector-curvature="0" + id="path3940-9" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-3" + style="overflow:visible"> + <path + id="path3946-1" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3946-7" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="marker4880" + style="overflow:visible"> + <path + id="path4882" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-5" + style="overflow:visible"> + <path + id="path3946-0" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-6" + style="overflow:visible"> + <path + id="path3946-10" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-36" + style="overflow:visible"> + <path + id="path3940-0" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-6" + style="overflow:visible"> + <path + id="path3940-26" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow1Send" + orient="auto" + refY="0" + refX="0" + id="Arrow1Send-8" + style="overflow:visible"> + <path + id="path3940-7" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.2,0,0,-0.2,-1.2,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="true" + inkscape:zoom="0.96484375" + inkscape:cx="507.0191" + inkscape:cy="885.62207" + inkscape:window-x="47" + inkscape:window-y="28" + inkscape:window-maximized="0" + inkscape:current-layer="g3115" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5"> + <inkscape:grid + type="xygrid" + id="grid3381" /> + </sodipodi:namedview> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send-8)" + d="m 6922.3555,14693.733 16.472,2346.582" + id="path3134-9-0-3-1-9-9" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2431.6011,-4570.136)" + id="g3188"> + <text + xml:space="preserve" + x="3172.5554" + y="13255.592" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">->qsmask &= ~->grpmask</text> + <g + id="g3107" + transform="translate(947.90548,11584.029)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5452.3052" + y="13844.535" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5">Root</tspan></text> + </g> + <rect + ry="0" + id="rect118" + style="fill:none;stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + rx="0" + height="7164.1636" + width="13639.945" + y="7160.9038" + x="37.490932" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="7367.7192" + x="134.46094" + xml:space="preserve">rcu_report_rnp()</text> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(2311.1375,-4533.769)" + id="g3147"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + </g> + <g + style="fill:none;stroke-width:0.025in" + transform="translate(3162.2182,-4570.136)" + id="g3153"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0">Leaf</tspan></text> + </g> + <g + transform="translate(-1661.3439,-4533.769)" + id="g3147-3" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-6" + transform="translate(3054.6101,13760.052)"> + <rect + id="rect112-7-0" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="5284.9155" + y="15386.685" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-3" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <g + transform="translate(-170.52365,-4570.136)" + id="g3153-2" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-6" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-1" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-8" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-7" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-9">Leaf</tspan></text> + </g> + <g + transform="translate(-3503.2651,-4570.136)" + id="g3153-20" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-2" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-3" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-7" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-92">Leaf</tspan></text> + </g> + <g + transform="translate(-6836.0062,-4570.136)" + id="g3153-28" + style="fill:none;stroke-width:0.025in"> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-6-9-9" + transform="translate(5213.0126,16008.808)"> + <rect + id="rect112-7-1-7" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-5-2-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="9717.4141" + y="18269.314" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3-7-35-7-6" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6-5-6-0-1">Leaf</tspan></text> + <text + xml:space="preserve" + x="7422.3945" + y="17661.012" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-67" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">->qsmask &= ~->grpmask</text> + </g> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812908px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 5454.9508,9312.2011 -582.9982,865.0929" + id="path3414" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8263.7327,9312.4631 582.9982,865.0929" + id="path3414-9" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812813px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 3504.3177,11525.377 -582.9982,865.094" + id="path3414-8" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 10249.365,11525.639 583,865.094" + id="path3414-9-4" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 4920.8141,11525.377 0,846.288" + id="path3414-8-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:13.29812717px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-end:url(#Arrow2Lend)" + d="m 8797.7894,11551.973 0,846.288" + id="path3414-8-3-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + sodipodi:nodetypes="cccccccccccccccc" + inkscape:connector-curvature="0" + id="path3134-9-0-3" + d="m 6912.3719,6251.0009 -2.8276,1315.669 -5343.8436,17.119 -2.8276,6561.7441 2039.08,17.963 -2.7042,-2144.14 -491.6706,-0.211 -2.7042,-1993.689 1487.718,-4.728 -17.8001,1812.453 2017.2374,-7.643 4.9532,-2151.5715 -1405.5263,11.1629 -10.9191,-1891.1465 1739.2165,-2.718 0.1141,7086.0301" + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" /> + <g + id="g4405" + transform="translate(1241.222,9051.8644)"> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:url(#Arrow1Send)" + d="m 5694.6259,-9006.994 -2.828,3233.9212 -2616.9163,17.1191 15.9788,1446.406 2603.2719,-0.8434 -29.6182,2086.6656" + id="path3134-9-0-3-1" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccccc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:none" + d="m 5674.0539,-5773.0705 2616.9163,17.1191 -15.9788,1465.2124 -2584.4655,-19.6498" + id="path3134-9-0-3-1-9" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cccc" /> + <g + transform="translate(-456.05505,0)" + id="g3115"> + <rect + x="4485.6865" + y="-8571.0352" + width="3296.428" + height="2199.2754" + rx="0" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057923, 60.00115859;stroke-dashoffset:0" + id="rect118-3" + ry="0" /> + <g + style="fill:none;stroke-width:0.025in" + id="g3107-7" + transform="translate(2656.673,-8952.2968)"> + <rect + id="rect112-5" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="4714.3018" + y="-8349.1943" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">note_gp_changes()</text> + <text + xml:space="preserve" + x="5014.2954" + y="-7170.978" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rdp->gp_seq</text> + <text + xml:space="preserve" + x="5035.4155" + y="-7436.1636" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-6-6-2" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">__note_gp_changes()</text> + <text + xml:space="preserve" + x="7162.7471" + y="-6692.6006" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7-5-1-2-3" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + sodipodi:linespacing="125%"><tspan + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans" + id="tspan3104-6">Leaf</tspan></text> + </g> + <g + transform="translate(-2049.897,-585.6713)" + id="g3148"> + <rect + ry="0" + id="rect118-3-5" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="412.66794" + width="3240.0085" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="3745.7725" + xml:space="preserve">rcu_note_context_switch()</text> + </g> + <g + transform="translate(3131.2648,-585.6713)" + id="g3148-5"> + <rect + ry="0" + id="rect118-3-5-6" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="412.66794" + width="3240.0085" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="3745.7725" + xml:space="preserve">rcu_sched_clock_irq()</text> + </g> + <g + transform="translate(399.7744,828.86448)" + id="g3148-9"> + <rect + ry="0" + id="rect118-3-5-1" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="864.02148" + width="3540.9114" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="3745.7725" + xml:space="preserve">rcu_core()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27-0" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4165.7954" + x="3745.7725" + xml:space="preserve">rcu_check_quiescent_state()</text> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-27-0-9" + font-size="192" + font-weight="bold" + font-style="normal" + y="-3914.085" + x="3745.7725" + xml:space="preserve">rcu__report_qs_rdp())</text> + </g> + <g + id="g4504-3" + transform="translate(5136.3339,-23870.546)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-3-9" + transform="translate(5136.3339,-20417.959)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5-9" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2-6" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-3-0" + transform="translate(-2824.9451,-23870.546)"> + <path + transform="matrix(13.298129,0,0,13.298129,228.84485,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-6" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-26" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5-1" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-8" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5-7" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-9" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2-2" + sodipodi:role="line">critical section</tspan></text> + </g> + <g + id="g4504-3-9-0" + transform="translate(-2931.3303,-20417.959)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084-6-1-2" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2-7-2-3" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4409.043" + xml:space="preserve"><tspan + id="tspan3104-5-7-7" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">RCU</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110-3-0-5" + y="17055.541" + x="4579.373" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4579.373" + id="tspan3112-5-9-9" + sodipodi:role="line">read-side</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114-6-3-2" + y="17297.08" + x="4584.8276" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4584.8276" + id="tspan3116-2-6-2" + sodipodi:role="line">critical section</tspan></text> + </g> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:none" + d="m 9699.0326,-6264.1445 0,2393.6632" + id="path3134-9-0-3-1-9-8" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#969696;stroke-width:53.19251633;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;marker-end:none" + d="m 1640.3664,-6264.1445 0,2393.6632" + id="path3134-9-0-3-1-9-8-9" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + </g> + <g + id="g4504" + transform="translate(2347.5727,554.69889)"> + <path + transform="matrix(13.298129,0,0,13.298129,335.22989,12456.379)" + d="m 385.2961,345.54001 c 0,21.84301 -29.51209,39.55026 -65.9171,39.55026 -36.40501,0 -65.91711,-17.70725 -65.91711,-39.55026 0,-21.84301 29.5121,-39.55026 65.91711,-39.55026 36.40501,0 65.9171,17.70725 65.9171,39.55026 z" + sodipodi:ry="39.550262" + sodipodi:rx="65.917107" + sodipodi:cy="345.54001" + sodipodi:cx="319.379" + id="path3084" + style="fill:#ffffa1;fill-opacity:0;stroke:#000000;stroke-width:2.25600004;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:2.256, 4.512;stroke-dashoffset:0" + sodipodi:type="arc" /> + <text + sodipodi:linespacing="125%" + style="font-size:192px;font-style:normal;font-weight:bold;line-height:125%;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-1-2" + font-size="192" + font-weight="bold" + font-style="normal" + y="16835.086" + x="4273.4326" + xml:space="preserve"><tspan + id="tspan3104" + style="font-size:159.57754517px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:start;line-height:125%;writing-mode:lr-tb;text-anchor:start;font-family:Liberation Sans;-inkscape-font-specification:Liberation Sans">Wake up</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3110" + y="17055.541" + x="4585.2246" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17055.541" + x="4585.2246" + id="tspan3112" + sodipodi:role="line">grace-period</tspan></text> + <text + sodipodi:linespacing="125%" + id="text3114" + y="17297.08" + x="4582.3804" + style="font-size:159.57754517px;font-style:normal;font-weight:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans" + xml:space="preserve"><tspan + y="17297.08" + x="4582.3804" + id="tspan3116" + sodipodi:role="line">kernel thread</tspan></text> + </g> + <g + transform="translate(1783.6576,20674.512)" + id="g3148-2"> + <rect + ry="0" + id="rect118-3-5-2" + style="fill:none;stroke:#000000;stroke-width:30.00057983;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057963, 60.00115926;stroke-dashoffset:0" + rx="0" + height="412.66794" + width="3240.0085" + y="-4640.499" + x="3517.1572" /> + <text + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier" + id="text202-7-5-3-8" + font-size="192" + font-weight="bold" + font-style="normal" + y="-4418.6582" + x="4064.9268" + xml:space="preserve">rcu_report_qs_rsp()</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Memory-Ordering/rcu_node-lock.svg b/Documentation/RCU/Design/Memory-Ordering/rcu_node-lock.svg new file mode 100644 index 0000000000..94c96c595a --- /dev/null +++ b/Documentation/RCU/Design/Memory-Ordering/rcu_node-lock.svg @@ -0,0 +1,229 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Creator: fig2dev Version 3.2 Patchlevel 5e --> + +<!-- CreationDate: Wed Dec 9 17:35:03 2015 --> + +<!-- Magnification: 2.000 --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="303.54147" + height="211.57945" + viewBox="-44 -44 4036.5336 2812.3117" + id="svg2" + version="1.1" + inkscape:version="0.48.4 r9939" + sodipodi:docname="rcu_node-lock.svg"> + <metadata + id="metadata212"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <defs + id="defs210"> + <marker + inkscape:stockid="Arrow1Mend" + orient="auto" + refY="0" + refX="0" + id="Arrow1Mend" + style="overflow:visible"> + <path + id="path3970" + d="M 0,0 5,-5 -12.5,0 5,5 0,0 z" + style="fill-rule:evenodd;stroke:#000000;stroke-width:1pt" + transform="matrix(-0.4,0,0,-0.4,-4,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1" + objecttolerance="10" + gridtolerance="10" + guidetolerance="10" + inkscape:pageopacity="0" + inkscape:pageshadow="2" + inkscape:window-width="1087" + inkscape:window-height="1144" + id="namedview208" + showgrid="false" + inkscape:zoom="1.0495049" + inkscape:cx="311.2033" + inkscape:cy="168.10913" + inkscape:window-x="833" + inkscape:window-y="28" + inkscape:window-maximized="0" + inkscape:current-layer="g4" + fit-margin-top="5" + fit-margin-right="5" + fit-margin-left="5" + fit-margin-bottom="5" /> + <g + style="fill:none;stroke-width:0.025in" + id="g4" + transform="translate(-1905.5784,-4568.3024)"> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5710 5790--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4512 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1040 9300 - 1502 7140--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2240 8100 - 2702 5940--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1350 3450 - 2444 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4950 3450 - 3854 2510--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 6600 - 4050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 6600 - 1050 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 5400 - 2250 4290--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 2250 8100 - 2250 6240--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 1050 9300 - 1050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 4050 9300 - 4050 7440--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 8100 - 5250 6240--> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Circle --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9300 3150 - 10860 3150--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 3600 - 11400 4410--> + <!-- Line: box --> + <rect + x="1943.0693" + y="4603.417" + width="3873.5518" + height="2650.6289" + rx="0" + style="stroke:#000000;stroke-width:30.00057793;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:30.00057884, 60.00115769;stroke-dashoffset:0" + id="rect118" + ry="0" /> + <!-- Line --> + <!-- Arrowhead on XXXpoint 11400 5100 - 11400 5910--> + <!-- Line: box --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9900 4650 - 10860 4650--> + <!-- Line --> + <!-- Arrowhead on XXXpoint 9600 6150 - 10860 6150--> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <!-- Line --> + <!-- Arrowhead on XXXpoint 5250 5400 - 5250 4290--> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Line: box --> + <!-- Text --> + <!-- Text --> + <!-- Text --> + <text + xml:space="preserve" + x="3105.219" + y="6425.6445" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;font-family:Courier">rcu_accelerate_cbs()</text> + <!-- Text --> + <!-- Text --> + <g + id="g3107" + transform="translate(747.5807,4700.8888)"> + <rect + id="rect112" + style="stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1370.8721" + width="2809.1992" + y="949.37109" + x="2084.55" /> + <rect + id="rect112-3" + style="fill:none;stroke:#000000;stroke-width:30;stroke-linecap:butt;stroke-linejoin:miter" + rx="0" + height="1294.8468" + width="2809.1992" + y="1025.3964" + x="2084.55" /> + </g> + <text + xml:space="preserve" + x="2025.5763" + y="4825.2578" + font-style="normal" + font-weight="bold" + font-size="192" + id="text202-7" + style="font-size:192px;font-style:normal;font-weight:bold;text-anchor:start;fill:#000000;stroke-width:0.025in;font-family:Courier">rcu_prepare_for_idle()</text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Requirements/GPpartitionReaders1.svg b/Documentation/RCU/Design/Requirements/GPpartitionReaders1.svg new file mode 100644 index 0000000000..87851a8fac --- /dev/null +++ b/Documentation/RCU/Design/Requirements/GPpartitionReaders1.svg @@ -0,0 +1,374 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="447.99197" + height="428.19299" + id="svg2" + version="1.1" + inkscape:version="0.48.3.1 r9886" + sodipodi:docname="GPpartitionReaders1.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.6184291" + inkscape:cx="223.99599" + inkscape:cy="214.0965" + inkscape:document-units="px" + inkscape:current-layer="layer1" + showgrid="false" + inkscape:window-width="979" + inkscape:window-height="836" + inkscape:window-x="571" + inkscape:window-y="335" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title></dc:title> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-28.441125,-185.60612)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991"></flowPara></flowRoot> <g + id="g4433" + transform="translate(2,0)"> + <text + sodipodi:linespacing="125%" + id="text2993" + y="-261.66608" + x="412.12299" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + xml:space="preserve" + transform="matrix(0,1,-1,0,0,0)"><tspan + y="-261.66608" + x="412.12299" + id="tspan2995" + sodipodi:role="line">synchronize_rcu()</tspan></text> + <g + id="g4417" + transform="matrix(0,1,-1,0,730.90257,222.4928)"> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#Arrow2Lstart);marker-end:url(#Arrow2Lend)" + d="m 97.580736,477.4048 183.140664,0" + id="path2997" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 96.752718,465.38398 0,22.62742" + id="path4397" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 281.54942,465.38397 0,22.62742" + id="path4397-5" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + </g> + </g> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.04738" + y="268.18076" + id="text4429" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431" + x="112.04738" + y="268.18076">WRITE_ONCE(a, 1);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.04738" + y="439.13766" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="112.04738" + y="439.13766">WRITE_ONCE(b, 1);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="255.60869" + y="309.29346" + id="text4445" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4447" + x="255.60869" + y="309.29346">r1 = READ_ONCE(a);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="255.14423" + y="520.61786" + id="text4449" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4451" + x="255.14423" + y="520.61786">WRITE_ONCE(c, 1);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="384.71124" + id="text4453" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4455" + x="396.10254" + y="384.71124">r2 = READ_ONCE(b);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="582.13617" + id="text4457" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4459" + x="396.10254" + y="582.13617">r3 = READ_ONCE(c);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.08231" + y="213.91006" + id="text4461" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463" + x="112.08231" + y="213.91006">thread0()</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="252.34512" + y="213.91006" + id="text4461-6" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463-0" + x="252.34512" + y="213.91006">thread1()</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.42557" + y="213.91006" + id="text4461-2" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463-2" + x="396.42557" + y="213.91006">thread2()</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect4495" + width="436.28488" + height="416.4859" + x="34.648232" + y="191.10612" /> + <path + style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + d="m 183.14066,191.10612 0,417.193 -0.70711,0" + id="path4497" + inkscape:connector-curvature="0" /> + <path + style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + d="m 325.13867,191.10612 0,417.193 -0.70711,0" + id="path4497-5" + inkscape:connector-curvature="0" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="111.75929" + y="251.53981" + id="text4429-8" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9" + x="111.75929" + y="251.53981">rcu_read_lock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="367.91556" + id="text4429-8-9" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4" + x="396.10254" + y="367.91556">rcu_read_lock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="597.40289" + id="text4429-8-9-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4-4" + x="396.10254" + y="597.40289">rcu_read_unlock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="111.75929" + y="453.15311" + id="text4429-8-9-3-1" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4-4-6" + x="111.75929" + y="453.15311">rcu_read_unlock();</tspan></text> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 33.941125,227.87568 436.284885,0 0,0.7071" + id="path4608" + inkscape:connector-curvature="0" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="394.94427" + y="345.66351" + id="text4648" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650" + x="394.94427" + y="345.66351">QS</tspan></text> + <path + sodipodi:type="arc" + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(36.441125,199.60612)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.11968" + y="475.77856" + id="text4648-4" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-4" + x="112.11968" + y="475.77856">QS</tspan></text> + <path + sodipodi:type="arc" + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-7" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(-246.38346,329.72117)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <path + sodipodi:type="arc" + style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-7-7" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(-103.65246,202.90878)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="254.85066" + y="348.96619" + id="text4648-4-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-4-5" + x="254.85066" + y="348.96619">QS</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Requirements/ReadersPartitionGP1.svg b/Documentation/RCU/Design/Requirements/ReadersPartitionGP1.svg new file mode 100644 index 0000000000..e2a8af592b --- /dev/null +++ b/Documentation/RCU/Design/Requirements/ReadersPartitionGP1.svg @@ -0,0 +1,639 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!-- Created with Inkscape (http://www.inkscape.org/) --> + +<svg + xmlns:dc="http://purl.org/dc/elements/1.1/" + xmlns:cc="http://creativecommons.org/ns#" + xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" + xmlns:svg="http://www.w3.org/2000/svg" + xmlns="http://www.w3.org/2000/svg" + xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd" + xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape" + width="735.25" + height="516.21875" + id="svg2" + version="1.1" + inkscape:version="0.48.3.1 r9886" + sodipodi:docname="ReadersPartitionGP1.svg"> + <defs + id="defs4"> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend" + style="overflow:visible"> + <path + id="path3792" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart" + style="overflow:visible"> + <path + id="path3789" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lstart" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lstart-4" + style="overflow:visible"> + <path + id="path3789-9" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(1.1,0,0,1.1,1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + <marker + inkscape:stockid="Arrow2Lend" + orient="auto" + refY="0" + refX="0" + id="Arrow2Lend-4" + style="overflow:visible"> + <path + id="path3792-4" + style="fill-rule:evenodd;stroke-width:0.625;stroke-linejoin:round" + d="M 8.7185878,4.0337352 -2.2072895,0.01601326 8.7185884,-4.0017078 c -1.7454984,2.3720609 -1.7354408,5.6174519 -6e-7,8.035443 z" + transform="matrix(-1.1,0,0,-1.1,-1.1,0)" + inkscape:connector-curvature="0" /> + </marker> + </defs> + <sodipodi:namedview + id="base" + pagecolor="#ffffff" + bordercolor="#666666" + borderopacity="1.0" + inkscape:pageopacity="0.0" + inkscape:pageshadow="2" + inkscape:zoom="1.3670394" + inkscape:cx="367.26465" + inkscape:cy="258.46182" + inkscape:document-units="px" + inkscape:current-layer="g4433-6" + showgrid="false" + inkscape:window-width="1351" + inkscape:window-height="836" + inkscape:window-x="438" + inkscape:window-y="335" + inkscape:window-maximized="0" + fit-margin-top="5" + fit-margin-left="5" + fit-margin-right="5" + fit-margin-bottom="5" /> + <metadata + id="metadata7"> + <rdf:RDF> + <cc:Work + rdf:about=""> + <dc:format>image/svg+xml</dc:format> + <dc:type + rdf:resource="http://purl.org/dc/dcmitype/StillImage" /> + <dc:title /> + </cc:Work> + </rdf:RDF> + </metadata> + <g + inkscape:label="Layer 1" + inkscape:groupmode="layer" + id="layer1" + transform="translate(-29.15625,-185.59375)"> + <flowRoot + xml:space="preserve" + id="flowRoot2985" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace"><flowRegion + id="flowRegion2987"><rect + id="rect2989" + width="82.85714" + height="11.428572" + x="240" + y="492.36218" /></flowRegion><flowPara + id="flowPara2991" /></flowRoot> <g + id="g4433" + transform="translate(2,-12)"> + <text + sodipodi:linespacing="125%" + id="text2993" + y="-261.66608" + x="436.12299" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + xml:space="preserve" + transform="matrix(0,1,-1,0,0,0)"><tspan + y="-261.66608" + x="436.12299" + id="tspan2995" + sodipodi:role="line">synchronize_rcu()</tspan></text> + <g + id="g4417" + transform="matrix(0,1,-1,0,730.90257,222.4928)"> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#Arrow2Lstart);marker-end:url(#Arrow2Lend)" + d="M 97.580736,477.4048 327.57913,476.09759" + id="path2997" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 96.752718,465.38398 0,22.62742" + id="path4397" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 328.40703,465.38397 0,22.62742" + id="path4397-5" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + </g> + </g> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.04738" + y="268.18076" + id="text4429" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431" + x="112.04738" + y="268.18076">WRITE_ONCE(a, 1);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.04738" + y="487.13766" + id="text4441" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4443" + x="112.04738" + y="487.13766">WRITE_ONCE(b, 1);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="255.60869" + y="297.29346" + id="text4445" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4447" + x="255.60869" + y="297.29346">r1 = READ_ONCE(a);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="255.14423" + y="554.61786" + id="text4449" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4451" + x="255.14423" + y="554.61786">WRITE_ONCE(c, 1);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="370.71124" + id="text4453" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4455" + x="396.10254" + y="370.71124">WRITE_ONCE(d, 1);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="572.13617" + id="text4457" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4459" + x="396.10254" + y="572.13617">r2 = READ_ONCE(c);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.08231" + y="213.91006" + id="text4461" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463" + x="112.08231" + y="213.91006">thread0()</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="252.34512" + y="213.91006" + id="text4461-6" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463-0" + x="252.34512" + y="213.91006">thread1()</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.42557" + y="213.91006" + id="text4461-2" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463-2" + x="396.42557" + y="213.91006">thread2()</tspan></text> + <rect + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="rect4495" + width="724.25244" + height="505.21201" + x="34.648232" + y="191.10612" /> + <path + style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + d="m 183.14066,191.10612 0,504.24243" + id="path4497" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + d="m 325.13867,191.10612 0,504.24243" + id="path4497-5" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="111.75929" + y="251.53981" + id="text4429-8" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9" + x="111.75929" + y="251.53981">rcu_read_lock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="353.91556" + id="text4429-8-9" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4" + x="396.10254" + y="353.91556">rcu_read_lock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="396.10254" + y="587.40289" + id="text4429-8-9-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4-4" + x="396.10254" + y="587.40289">rcu_read_unlock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="111.75929" + y="501.15311" + id="text4429-8-9-3-1" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4-4-6" + x="111.75929" + y="501.15311">rcu_read_unlock();</tspan></text> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 33.941125,227.87568 724.941765,0" + id="path4608" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="394.94427" + y="331.66351" + id="text4648" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650" + x="394.94427" + y="331.66351">QS</tspan></text> + <path + sodipodi:type="arc" + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(36.441125,185.60612)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="112.11968" + y="523.77856" + id="text4648-4" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-4" + x="112.11968" + y="523.77856">QS</tspan></text> + <path + sodipodi:type="arc" + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-7" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(-246.38346,377.72117)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <path + sodipodi:type="arc" + style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-7-7" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(-103.65246,190.90878)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="254.85066" + y="336.96619" + id="text4648-4-3" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-4-5" + x="254.85066" + y="336.96619">QS</tspan></text> + <path + style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + d="m 470.93311,190.39903 0,504.24243" + id="path4497-5-6" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + d="m 616.22755,190.38323 0,504.24243" + id="path4497-5-2" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <g + id="g4433-6" + transform="translate(288.0964,78.32827)"> + <text + sodipodi:linespacing="125%" + id="text2993-7" + y="-261.66608" + x="440.12299" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + xml:space="preserve" + transform="matrix(0,1,-1,0,0,0)"><tspan + y="-261.66608" + x="440.12299" + id="tspan2995-1" + sodipodi:role="line">synchronize_rcu()</tspan></text> + <g + id="g4417-1" + transform="matrix(0,1,-1,0,730.90257,222.4928)"> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;marker-start:url(#Arrow2Lstart);marker-end:url(#Arrow2Lend)" + d="M 97.580736,477.4048 328.5624,477.07246" + id="path2997-2" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 96.752718,465.38398 0,22.62742" + id="path4397-3" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + <path + style="fill:none;stroke:#000000;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" + d="m 329.39039,465.38397 0,22.62742" + id="path4397-5-4" + inkscape:connector-curvature="0" + sodipodi:nodetypes="cc" /> + </g> + </g> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="541.70508" + y="387.6217" + id="text4445-0" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4447-5" + x="541.70508" + y="387.6217">r3 = READ_ONCE(d);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="541.2406" + y="646.94611" + id="text4449-6" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4451-6" + x="541.2406" + y="646.94611">WRITE_ONCE(e, 1);</tspan></text> + <path + sodipodi:type="arc" + style="fill:#ffffff;fill-opacity:1;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-7-7-5" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(182.44393,281.23704)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="540.94702" + y="427.29443" + id="text4648-4-3-1" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-4-5-7" + x="540.94702" + y="427.29443">QS</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="686.27747" + y="461.83929" + id="text4453-7" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4455-1" + x="686.27747" + y="461.83929">r4 = READ_ONCE(b);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="686.27747" + y="669.26422" + id="text4457-9" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4459-2" + x="686.27747" + y="669.26422">r5 = READ_ONCE(e);</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="686.27747" + y="445.04358" + id="text4429-8-9-33" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4-2" + x="686.27747" + y="445.04358">rcu_read_lock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="686.27747" + y="684.53094" + id="text4429-8-9-3-8" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4431-9-4-4-5" + x="686.27747" + y="684.53094">rcu_read_unlock();</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="685.11914" + y="422.79153" + id="text4648-9" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-7" + x="685.11914" + y="422.79153">QS</tspan></text> + <path + sodipodi:type="arc" + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-8" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(326.61602,276.73415)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="397.85934" + y="609.59003" + id="text4648-5" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-77" + x="397.85934" + y="609.59003">QS</tspan></text> + <path + sodipodi:type="arc" + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-80" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(39.356201,463.53264)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="256.75986" + y="586.99133" + id="text4648-5-2" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4650-77-7" + x="256.75986" + y="586.99133">QS</tspan></text> + <path + sodipodi:type="arc" + style="fill:none;stroke:#000000;stroke-width:1;stroke-miterlimit:4;stroke-opacity:1;stroke-dasharray:none;stroke-dashoffset:0" + id="path4652-80-5" + sodipodi:cx="358.85669" + sodipodi:cy="142.87541" + sodipodi:rx="10.960155" + sodipodi:ry="10.253048" + d="m 358.86939,132.62237 a 10.960155,10.253048 0 1 1 -0.0228,0" + transform="translate(-101.74328,440.93395)" + sodipodi:start="4.7135481" + sodipodi:end="10.994651" + sodipodi:open="true" /> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="546.22791" + y="213.91006" + id="text4461-2-5" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463-2-6" + x="546.22791" + y="213.91006">thread3()</tspan></text> + <text + xml:space="preserve" + style="font-size:10px;font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;text-align:center;line-height:125%;letter-spacing:0px;word-spacing:0px;writing-mode:lr-tb;text-anchor:middle;fill:#000000;fill-opacity:1;stroke:none;font-family:monospace;-inkscape-font-specification:monospace" + x="684.00067" + y="213.91006" + id="text4461-2-1" + sodipodi:linespacing="125%"><tspan + sodipodi:role="line" + id="tspan4463-2-0" + x="684.00067" + y="213.91006">thread4()</tspan></text> + </g> +</svg> diff --git a/Documentation/RCU/Design/Requirements/Requirements.rst b/Documentation/RCU/Design/Requirements/Requirements.rst new file mode 100644 index 0000000000..f3b605285a --- /dev/null +++ b/Documentation/RCU/Design/Requirements/Requirements.rst @@ -0,0 +1,2726 @@ +================================= +A Tour Through RCU's Requirements +================================= + +Copyright IBM Corporation, 2015 + +Author: Paul E. McKenney + +The initial version of this document appeared in the +`LWN <https://lwn.net/>`_ on those articles: +`part 1 <https://lwn.net/Articles/652156/>`_, +`part 2 <https://lwn.net/Articles/652677/>`_, and +`part 3 <https://lwn.net/Articles/653326/>`_. + +Introduction +------------ + +Read-copy update (RCU) is a synchronization mechanism that is often used +as a replacement for reader-writer locking. RCU is unusual in that +updaters do not block readers, which means that RCU's read-side +primitives can be exceedingly fast and scalable. In addition, updaters +can make useful forward progress concurrently with readers. However, all +this concurrency between RCU readers and updaters does raise the +question of exactly what RCU readers are doing, which in turn raises the +question of exactly what RCU's requirements are. + +This document therefore summarizes RCU's requirements, and can be +thought of as an informal, high-level specification for RCU. It is +important to understand that RCU's specification is primarily empirical +in nature; in fact, I learned about many of these requirements the hard +way. This situation might cause some consternation, however, not only +has this learning process been a lot of fun, but it has also been a +great privilege to work with so many people willing to apply +technologies in interesting new ways. + +All that aside, here are the categories of currently known RCU +requirements: + +#. `Fundamental Requirements`_ +#. `Fundamental Non-Requirements`_ +#. `Parallelism Facts of Life`_ +#. `Quality-of-Implementation Requirements`_ +#. `Linux Kernel Complications`_ +#. `Software-Engineering Requirements`_ +#. `Other RCU Flavors`_ +#. `Possible Future Changes`_ + +This is followed by a summary_, however, the answers to +each quick quiz immediately follows the quiz. Select the big white space +with your mouse to see the answer. + +Fundamental Requirements +------------------------ + +RCU's fundamental requirements are the closest thing RCU has to hard +mathematical requirements. These are: + +#. `Grace-Period Guarantee`_ +#. `Publish/Subscribe Guarantee`_ +#. `Memory-Barrier Guarantees`_ +#. `RCU Primitives Guaranteed to Execute Unconditionally`_ +#. `Guaranteed Read-to-Write Upgrade`_ + +Grace-Period Guarantee +~~~~~~~~~~~~~~~~~~~~~~ + +RCU's grace-period guarantee is unusual in being premeditated: Jack +Slingwine and I had this guarantee firmly in mind when we started work +on RCU (then called “rclock”) in the early 1990s. That said, the past +two decades of experience with RCU have produced a much more detailed +understanding of this guarantee. + +RCU's grace-period guarantee allows updaters to wait for the completion +of all pre-existing RCU read-side critical sections. An RCU read-side +critical section begins with the marker rcu_read_lock() and ends +with the marker rcu_read_unlock(). These markers may be nested, and +RCU treats a nested set as one big RCU read-side critical section. +Production-quality implementations of rcu_read_lock() and +rcu_read_unlock() are extremely lightweight, and in fact have +exactly zero overhead in Linux kernels built for production use with +``CONFIG_PREEMPTION=n``. + +This guarantee allows ordering to be enforced with extremely low +overhead to readers, for example: + + :: + + 1 int x, y; + 2 + 3 void thread0(void) + 4 { + 5 rcu_read_lock(); + 6 r1 = READ_ONCE(x); + 7 r2 = READ_ONCE(y); + 8 rcu_read_unlock(); + 9 } + 10 + 11 void thread1(void) + 12 { + 13 WRITE_ONCE(x, 1); + 14 synchronize_rcu(); + 15 WRITE_ONCE(y, 1); + 16 } + +Because the synchronize_rcu() on line 14 waits for all pre-existing +readers, any instance of thread0() that loads a value of zero from +``x`` must complete before thread1() stores to ``y``, so that +instance must also load a value of zero from ``y``. Similarly, any +instance of thread0() that loads a value of one from ``y`` must have +started after the synchronize_rcu() started, and must therefore also +load a value of one from ``x``. Therefore, the outcome: + + :: + + (r1 == 0 && r2 == 1) + +cannot happen. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Wait a minute! You said that updaters can make useful forward | +| progress concurrently with readers, but pre-existing readers will | +| block synchronize_rcu()!!! | +| Just who are you trying to fool??? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| First, if updaters do not wish to be blocked by readers, they can use | +| call_rcu() or kfree_rcu(), which will be discussed later. | +| Second, even when using synchronize_rcu(), the other update-side | +| code does run concurrently with readers, whether pre-existing or not. | ++-----------------------------------------------------------------------+ + +This scenario resembles one of the first uses of RCU in +`DYNIX/ptx <https://en.wikipedia.org/wiki/DYNIX>`__, which managed a +distributed lock manager's transition into a state suitable for handling +recovery from node failure, more or less as follows: + + :: + + 1 #define STATE_NORMAL 0 + 2 #define STATE_WANT_RECOVERY 1 + 3 #define STATE_RECOVERING 2 + 4 #define STATE_WANT_NORMAL 3 + 5 + 6 int state = STATE_NORMAL; + 7 + 8 void do_something_dlm(void) + 9 { + 10 int state_snap; + 11 + 12 rcu_read_lock(); + 13 state_snap = READ_ONCE(state); + 14 if (state_snap == STATE_NORMAL) + 15 do_something(); + 16 else + 17 do_something_carefully(); + 18 rcu_read_unlock(); + 19 } + 20 + 21 void start_recovery(void) + 22 { + 23 WRITE_ONCE(state, STATE_WANT_RECOVERY); + 24 synchronize_rcu(); + 25 WRITE_ONCE(state, STATE_RECOVERING); + 26 recovery(); + 27 WRITE_ONCE(state, STATE_WANT_NORMAL); + 28 synchronize_rcu(); + 29 WRITE_ONCE(state, STATE_NORMAL); + 30 } + +The RCU read-side critical section in do_something_dlm() works with +the synchronize_rcu() in start_recovery() to guarantee that +do_something() never runs concurrently with recovery(), but with +little or no synchronization overhead in do_something_dlm(). + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why is the synchronize_rcu() on line 28 needed? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Without that extra grace period, memory reordering could result in | +| do_something_dlm() executing do_something() concurrently with | +| the last bits of recovery(). | ++-----------------------------------------------------------------------+ + +In order to avoid fatal problems such as deadlocks, an RCU read-side +critical section must not contain calls to synchronize_rcu(). +Similarly, an RCU read-side critical section must not contain anything +that waits, directly or indirectly, on completion of an invocation of +synchronize_rcu(). + +Although RCU's grace-period guarantee is useful in and of itself, with +`quite a few use cases <https://lwn.net/Articles/573497/>`__, it would +be good to be able to use RCU to coordinate read-side access to linked +data structures. For this, the grace-period guarantee is not sufficient, +as can be seen in function add_gp_buggy() below. We will look at the +reader's code later, but in the meantime, just think of the reader as +locklessly picking up the ``gp`` pointer, and, if the value loaded is +non-\ ``NULL``, locklessly accessing the ``->a`` and ``->b`` fields. + + :: + + 1 bool add_gp_buggy(int a, int b) + 2 { + 3 p = kmalloc(sizeof(*p), GFP_KERNEL); + 4 if (!p) + 5 return -ENOMEM; + 6 spin_lock(&gp_lock); + 7 if (rcu_access_pointer(gp)) { + 8 spin_unlock(&gp_lock); + 9 return false; + 10 } + 11 p->a = a; + 12 p->b = a; + 13 gp = p; /* ORDERING BUG */ + 14 spin_unlock(&gp_lock); + 15 return true; + 16 } + +The problem is that both the compiler and weakly ordered CPUs are within +their rights to reorder this code as follows: + + :: + + 1 bool add_gp_buggy_optimized(int a, int b) + 2 { + 3 p = kmalloc(sizeof(*p), GFP_KERNEL); + 4 if (!p) + 5 return -ENOMEM; + 6 spin_lock(&gp_lock); + 7 if (rcu_access_pointer(gp)) { + 8 spin_unlock(&gp_lock); + 9 return false; + 10 } + 11 gp = p; /* ORDERING BUG */ + 12 p->a = a; + 13 p->b = a; + 14 spin_unlock(&gp_lock); + 15 return true; + 16 } + +If an RCU reader fetches ``gp`` just after ``add_gp_buggy_optimized`` +executes line 11, it will see garbage in the ``->a`` and ``->b`` fields. +And this is but one of many ways in which compiler and hardware +optimizations could cause trouble. Therefore, we clearly need some way +to prevent the compiler and the CPU from reordering in this manner, +which brings us to the publish-subscribe guarantee discussed in the next +section. + +Publish/Subscribe Guarantee +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +RCU's publish-subscribe guarantee allows data to be inserted into a +linked data structure without disrupting RCU readers. The updater uses +rcu_assign_pointer() to insert the new data, and readers use +rcu_dereference() to access data, whether new or old. The following +shows an example of insertion: + + :: + + 1 bool add_gp(int a, int b) + 2 { + 3 p = kmalloc(sizeof(*p), GFP_KERNEL); + 4 if (!p) + 5 return -ENOMEM; + 6 spin_lock(&gp_lock); + 7 if (rcu_access_pointer(gp)) { + 8 spin_unlock(&gp_lock); + 9 return false; + 10 } + 11 p->a = a; + 12 p->b = a; + 13 rcu_assign_pointer(gp, p); + 14 spin_unlock(&gp_lock); + 15 return true; + 16 } + +The rcu_assign_pointer() on line 13 is conceptually equivalent to a +simple assignment statement, but also guarantees that its assignment +will happen after the two assignments in lines 11 and 12, similar to the +C11 ``memory_order_release`` store operation. It also prevents any +number of “interesting” compiler optimizations, for example, the use of +``gp`` as a scratch location immediately preceding the assignment. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But rcu_assign_pointer() does nothing to prevent the two | +| assignments to ``p->a`` and ``p->b`` from being reordered. Can't that | +| also cause problems? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| No, it cannot. The readers cannot see either of these two fields | +| until the assignment to ``gp``, by which time both fields are fully | +| initialized. So reordering the assignments to ``p->a`` and ``p->b`` | +| cannot possibly cause any problems. | ++-----------------------------------------------------------------------+ + +It is tempting to assume that the reader need not do anything special to +control its accesses to the RCU-protected data, as shown in +do_something_gp_buggy() below: + + :: + + 1 bool do_something_gp_buggy(void) + 2 { + 3 rcu_read_lock(); + 4 p = gp; /* OPTIMIZATIONS GALORE!!! */ + 5 if (p) { + 6 do_something(p->a, p->b); + 7 rcu_read_unlock(); + 8 return true; + 9 } + 10 rcu_read_unlock(); + 11 return false; + 12 } + +However, this temptation must be resisted because there are a +surprisingly large number of ways that the compiler (or weak ordering +CPUs like the DEC Alpha) can trip this code up. For but one example, if +the compiler were short of registers, it might choose to refetch from +``gp`` rather than keeping a separate copy in ``p`` as follows: + + :: + + 1 bool do_something_gp_buggy_optimized(void) + 2 { + 3 rcu_read_lock(); + 4 if (gp) { /* OPTIMIZATIONS GALORE!!! */ + 5 do_something(gp->a, gp->b); + 6 rcu_read_unlock(); + 7 return true; + 8 } + 9 rcu_read_unlock(); + 10 return false; + 11 } + +If this function ran concurrently with a series of updates that replaced +the current structure with a new one, the fetches of ``gp->a`` and +``gp->b`` might well come from two different structures, which could +cause serious confusion. To prevent this (and much else besides), +do_something_gp() uses rcu_dereference() to fetch from ``gp``: + + :: + + 1 bool do_something_gp(void) + 2 { + 3 rcu_read_lock(); + 4 p = rcu_dereference(gp); + 5 if (p) { + 6 do_something(p->a, p->b); + 7 rcu_read_unlock(); + 8 return true; + 9 } + 10 rcu_read_unlock(); + 11 return false; + 12 } + +The rcu_dereference() uses volatile casts and (for DEC Alpha) memory +barriers in the Linux kernel. Should a |high-quality implementation of +C11 memory_order_consume [PDF]|_ +ever appear, then rcu_dereference() could be implemented as a +``memory_order_consume`` load. Regardless of the exact implementation, a +pointer fetched by rcu_dereference() may not be used outside of the +outermost RCU read-side critical section containing that +rcu_dereference(), unless protection of the corresponding data +element has been passed from RCU to some other synchronization +mechanism, most commonly locking or reference counting +(see ../../rcuref.rst). + +.. |high-quality implementation of C11 memory_order_consume [PDF]| replace:: high-quality implementation of C11 ``memory_order_consume`` [PDF] +.. _high-quality implementation of C11 memory_order_consume [PDF]: http://www.rdrop.com/users/paulmck/RCU/consume.2015.07.13a.pdf + +In short, updaters use rcu_assign_pointer() and readers use +rcu_dereference(), and these two RCU API elements work together to +ensure that readers have a consistent view of newly added data elements. + +Of course, it is also necessary to remove elements from RCU-protected +data structures, for example, using the following process: + +#. Remove the data element from the enclosing structure. +#. Wait for all pre-existing RCU read-side critical sections to complete + (because only pre-existing readers can possibly have a reference to + the newly removed data element). +#. At this point, only the updater has a reference to the newly removed + data element, so it can safely reclaim the data element, for example, + by passing it to kfree(). + +This process is implemented by remove_gp_synchronous(): + + :: + + 1 bool remove_gp_synchronous(void) + 2 { + 3 struct foo *p; + 4 + 5 spin_lock(&gp_lock); + 6 p = rcu_access_pointer(gp); + 7 if (!p) { + 8 spin_unlock(&gp_lock); + 9 return false; + 10 } + 11 rcu_assign_pointer(gp, NULL); + 12 spin_unlock(&gp_lock); + 13 synchronize_rcu(); + 14 kfree(p); + 15 return true; + 16 } + +This function is straightforward, with line 13 waiting for a grace +period before line 14 frees the old data element. This waiting ensures +that readers will reach line 7 of do_something_gp() before the data +element referenced by ``p`` is freed. The rcu_access_pointer() on +line 6 is similar to rcu_dereference(), except that: + +#. The value returned by rcu_access_pointer() cannot be + dereferenced. If you want to access the value pointed to as well as + the pointer itself, use rcu_dereference() instead of + rcu_access_pointer(). +#. The call to rcu_access_pointer() need not be protected. In + contrast, rcu_dereference() must either be within an RCU + read-side critical section or in a code segment where the pointer + cannot change, for example, in code protected by the corresponding + update-side lock. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Without the rcu_dereference() or the rcu_access_pointer(), | +| what destructive optimizations might the compiler make use of? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Let's start with what happens to do_something_gp() if it fails to | +| use rcu_dereference(). It could reuse a value formerly fetched | +| from this same pointer. It could also fetch the pointer from ``gp`` | +| in a byte-at-a-time manner, resulting in *load tearing*, in turn | +| resulting a bytewise mash-up of two distinct pointer values. It might | +| even use value-speculation optimizations, where it makes a wrong | +| guess, but by the time it gets around to checking the value, an | +| update has changed the pointer to match the wrong guess. Too bad | +| about any dereferences that returned pre-initialization garbage in | +| the meantime! | +| For remove_gp_synchronous(), as long as all modifications to | +| ``gp`` are carried out while holding ``gp_lock``, the above | +| optimizations are harmless. However, ``sparse`` will complain if you | +| define ``gp`` with ``__rcu`` and then access it without using either | +| rcu_access_pointer() or rcu_dereference(). | ++-----------------------------------------------------------------------+ + +In short, RCU's publish-subscribe guarantee is provided by the +combination of rcu_assign_pointer() and rcu_dereference(). This +guarantee allows data elements to be safely added to RCU-protected +linked data structures without disrupting RCU readers. This guarantee +can be used in combination with the grace-period guarantee to also allow +data elements to be removed from RCU-protected linked data structures, +again without disrupting RCU readers. + +This guarantee was only partially premeditated. DYNIX/ptx used an +explicit memory barrier for publication, but had nothing resembling +rcu_dereference() for subscription, nor did it have anything +resembling the dependency-ordering barrier that was later subsumed +into rcu_dereference() and later still into READ_ONCE(). The +need for these operations made itself known quite suddenly at a +late-1990s meeting with the DEC Alpha architects, back in the days when +DEC was still a free-standing company. It took the Alpha architects a +good hour to convince me that any sort of barrier would ever be needed, +and it then took me a good *two* hours to convince them that their +documentation did not make this point clear. More recent work with the C +and C++ standards committees have provided much education on tricks and +traps from the compiler. In short, compilers were much less tricky in +the early 1990s, but in 2015, don't even think about omitting +rcu_dereference()! + +Memory-Barrier Guarantees +~~~~~~~~~~~~~~~~~~~~~~~~~ + +The previous section's simple linked-data-structure scenario clearly +demonstrates the need for RCU's stringent memory-ordering guarantees on +systems with more than one CPU: + +#. Each CPU that has an RCU read-side critical section that begins + before synchronize_rcu() starts is guaranteed to execute a full + memory barrier between the time that the RCU read-side critical + section ends and the time that synchronize_rcu() returns. Without + this guarantee, a pre-existing RCU read-side critical section might + hold a reference to the newly removed ``struct foo`` after the + kfree() on line 14 of remove_gp_synchronous(). +#. Each CPU that has an RCU read-side critical section that ends after + synchronize_rcu() returns is guaranteed to execute a full memory + barrier between the time that synchronize_rcu() begins and the + time that the RCU read-side critical section begins. Without this + guarantee, a later RCU read-side critical section running after the + kfree() on line 14 of remove_gp_synchronous() might later run + do_something_gp() and find the newly deleted ``struct foo``. +#. If the task invoking synchronize_rcu() remains on a given CPU, + then that CPU is guaranteed to execute a full memory barrier sometime + during the execution of synchronize_rcu(). This guarantee ensures + that the kfree() on line 14 of remove_gp_synchronous() really + does execute after the removal on line 11. +#. If the task invoking synchronize_rcu() migrates among a group of + CPUs during that invocation, then each of the CPUs in that group is + guaranteed to execute a full memory barrier sometime during the + execution of synchronize_rcu(). This guarantee also ensures that + the kfree() on line 14 of remove_gp_synchronous() really does + execute after the removal on line 11, but also in the case where the + thread executing the synchronize_rcu() migrates in the meantime. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Given that multiple CPUs can start RCU read-side critical sections at | +| any time without any ordering whatsoever, how can RCU possibly tell | +| whether or not a given RCU read-side critical section starts before a | +| given instance of synchronize_rcu()? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| If RCU cannot tell whether or not a given RCU read-side critical | +| section starts before a given instance of synchronize_rcu(), then | +| it must assume that the RCU read-side critical section started first. | +| In other words, a given instance of synchronize_rcu() can avoid | +| waiting on a given RCU read-side critical section only if it can | +| prove that synchronize_rcu() started first. | +| A related question is “When rcu_read_lock() doesn't generate any | +| code, why does it matter how it relates to a grace period?” The | +| answer is that it is not the relationship of rcu_read_lock() | +| itself that is important, but rather the relationship of the code | +| within the enclosed RCU read-side critical section to the code | +| preceding and following the grace period. If we take this viewpoint, | +| then a given RCU read-side critical section begins before a given | +| grace period when some access preceding the grace period observes the | +| effect of some access within the critical section, in which case none | +| of the accesses within the critical section may observe the effects | +| of any access following the grace period. | +| | +| As of late 2016, mathematical models of RCU take this viewpoint, for | +| example, see slides 62 and 63 of the `2016 LinuxCon | +| EU <http://www2.rdrop.com/users/paulmck/scalability/paper/LinuxMM.201 | +| 6.10.04c.LCE.pdf>`__ | +| presentation. | ++-----------------------------------------------------------------------+ + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| The first and second guarantees require unbelievably strict ordering! | +| Are all these memory barriers *really* required? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Yes, they really are required. To see why the first guarantee is | +| required, consider the following sequence of events: | +| | +| #. CPU 1: rcu_read_lock() | +| #. CPU 1: ``q = rcu_dereference(gp); /* Very likely to return p. */`` | +| #. CPU 0: ``list_del_rcu(p);`` | +| #. CPU 0: synchronize_rcu() starts. | +| #. CPU 1: ``do_something_with(q->a);`` | +| ``/* No smp_mb(), so might happen after kfree(). */`` | +| #. CPU 1: rcu_read_unlock() | +| #. CPU 0: synchronize_rcu() returns. | +| #. CPU 0: ``kfree(p);`` | +| | +| Therefore, there absolutely must be a full memory barrier between the | +| end of the RCU read-side critical section and the end of the grace | +| period. | +| | +| The sequence of events demonstrating the necessity of the second rule | +| is roughly similar: | +| | +| #. CPU 0: ``list_del_rcu(p);`` | +| #. CPU 0: synchronize_rcu() starts. | +| #. CPU 1: rcu_read_lock() | +| #. CPU 1: ``q = rcu_dereference(gp);`` | +| ``/* Might return p if no memory barrier. */`` | +| #. CPU 0: synchronize_rcu() returns. | +| #. CPU 0: ``kfree(p);`` | +| #. CPU 1: ``do_something_with(q->a); /* Boom!!! */`` | +| #. CPU 1: rcu_read_unlock() | +| | +| And similarly, without a memory barrier between the beginning of the | +| grace period and the beginning of the RCU read-side critical section, | +| CPU 1 might end up accessing the freelist. | +| | +| The “as if” rule of course applies, so that any implementation that | +| acts as if the appropriate memory barriers were in place is a correct | +| implementation. That said, it is much easier to fool yourself into | +| believing that you have adhered to the as-if rule than it is to | +| actually adhere to it! | ++-----------------------------------------------------------------------+ + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| You claim that rcu_read_lock() and rcu_read_unlock() generate | +| absolutely no code in some kernel builds. This means that the | +| compiler might arbitrarily rearrange consecutive RCU read-side | +| critical sections. Given such rearrangement, if a given RCU read-side | +| critical section is done, how can you be sure that all prior RCU | +| read-side critical sections are done? Won't the compiler | +| rearrangements make that impossible to determine? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| In cases where rcu_read_lock() and rcu_read_unlock() generate | +| absolutely no code, RCU infers quiescent states only at special | +| locations, for example, within the scheduler. Because calls to | +| schedule() had better prevent calling-code accesses to shared | +| variables from being rearranged across the call to schedule(), if | +| RCU detects the end of a given RCU read-side critical section, it | +| will necessarily detect the end of all prior RCU read-side critical | +| sections, no matter how aggressively the compiler scrambles the code. | +| Again, this all assumes that the compiler cannot scramble code across | +| calls to the scheduler, out of interrupt handlers, into the idle | +| loop, into user-mode code, and so on. But if your kernel build allows | +| that sort of scrambling, you have broken far more than just RCU! | ++-----------------------------------------------------------------------+ + +Note that these memory-barrier requirements do not replace the +fundamental RCU requirement that a grace period wait for all +pre-existing readers. On the contrary, the memory barriers called out in +this section must operate in such a way as to *enforce* this fundamental +requirement. Of course, different implementations enforce this +requirement in different ways, but enforce it they must. + +RCU Primitives Guaranteed to Execute Unconditionally +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The common-case RCU primitives are unconditional. They are invoked, they +do their job, and they return, with no possibility of error, and no need +to retry. This is a key RCU design philosophy. + +However, this philosophy is pragmatic rather than pigheaded. If someone +comes up with a good justification for a particular conditional RCU +primitive, it might well be implemented and added. After all, this +guarantee was reverse-engineered, not premeditated. The unconditional +nature of the RCU primitives was initially an accident of +implementation, and later experience with synchronization primitives +with conditional primitives caused me to elevate this accident to a +guarantee. Therefore, the justification for adding a conditional +primitive to RCU would need to be based on detailed and compelling use +cases. + +Guaranteed Read-to-Write Upgrade +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +As far as RCU is concerned, it is always possible to carry out an update +within an RCU read-side critical section. For example, that RCU +read-side critical section might search for a given data element, and +then might acquire the update-side spinlock in order to update that +element, all while remaining in that RCU read-side critical section. Of +course, it is necessary to exit the RCU read-side critical section +before invoking synchronize_rcu(), however, this inconvenience can +be avoided through use of the call_rcu() and kfree_rcu() API +members described later in this document. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But how does the upgrade-to-write operation exclude other readers? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| It doesn't, just like normal RCU updates, which also do not exclude | +| RCU readers. | ++-----------------------------------------------------------------------+ + +This guarantee allows lookup code to be shared between read-side and +update-side code, and was premeditated, appearing in the earliest +DYNIX/ptx RCU documentation. + +Fundamental Non-Requirements +---------------------------- + +RCU provides extremely lightweight readers, and its read-side +guarantees, though quite useful, are correspondingly lightweight. It is +therefore all too easy to assume that RCU is guaranteeing more than it +really is. Of course, the list of things that RCU does not guarantee is +infinitely long, however, the following sections list a few +non-guarantees that have caused confusion. Except where otherwise noted, +these non-guarantees were premeditated. + +#. `Readers Impose Minimal Ordering`_ +#. `Readers Do Not Exclude Updaters`_ +#. `Updaters Only Wait For Old Readers`_ +#. `Grace Periods Don't Partition Read-Side Critical Sections`_ +#. `Read-Side Critical Sections Don't Partition Grace Periods`_ + +Readers Impose Minimal Ordering +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Reader-side markers such as rcu_read_lock() and +rcu_read_unlock() provide absolutely no ordering guarantees except +through their interaction with the grace-period APIs such as +synchronize_rcu(). To see this, consider the following pair of +threads: + + :: + + 1 void thread0(void) + 2 { + 3 rcu_read_lock(); + 4 WRITE_ONCE(x, 1); + 5 rcu_read_unlock(); + 6 rcu_read_lock(); + 7 WRITE_ONCE(y, 1); + 8 rcu_read_unlock(); + 9 } + 10 + 11 void thread1(void) + 12 { + 13 rcu_read_lock(); + 14 r1 = READ_ONCE(y); + 15 rcu_read_unlock(); + 16 rcu_read_lock(); + 17 r2 = READ_ONCE(x); + 18 rcu_read_unlock(); + 19 } + +After thread0() and thread1() execute concurrently, it is quite +possible to have + + :: + + (r1 == 1 && r2 == 0) + +(that is, ``y`` appears to have been assigned before ``x``), which would +not be possible if rcu_read_lock() and rcu_read_unlock() had +much in the way of ordering properties. But they do not, so the CPU is +within its rights to do significant reordering. This is by design: Any +significant ordering constraints would slow down these fast-path APIs. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Can't the compiler also reorder this code? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| No, the volatile casts in READ_ONCE() and WRITE_ONCE() | +| prevent the compiler from reordering in this particular case. | ++-----------------------------------------------------------------------+ + +Readers Do Not Exclude Updaters +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Neither rcu_read_lock() nor rcu_read_unlock() exclude updates. +All they do is to prevent grace periods from ending. The following +example illustrates this: + + :: + + 1 void thread0(void) + 2 { + 3 rcu_read_lock(); + 4 r1 = READ_ONCE(y); + 5 if (r1) { + 6 do_something_with_nonzero_x(); + 7 r2 = READ_ONCE(x); + 8 WARN_ON(!r2); /* BUG!!! */ + 9 } + 10 rcu_read_unlock(); + 11 } + 12 + 13 void thread1(void) + 14 { + 15 spin_lock(&my_lock); + 16 WRITE_ONCE(x, 1); + 17 WRITE_ONCE(y, 1); + 18 spin_unlock(&my_lock); + 19 } + +If the thread0() function's rcu_read_lock() excluded the +thread1() function's update, the WARN_ON() could never fire. But +the fact is that rcu_read_lock() does not exclude much of anything +aside from subsequent grace periods, of which thread1() has none, so +the WARN_ON() can and does fire. + +Updaters Only Wait For Old Readers +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +It might be tempting to assume that after synchronize_rcu() +completes, there are no readers executing. This temptation must be +avoided because new readers can start immediately after +synchronize_rcu() starts, and synchronize_rcu() is under no +obligation to wait for these new readers. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Suppose that synchronize_rcu() did wait until *all* readers had | +| completed instead of waiting only on pre-existing readers. For how | +| long would the updater be able to rely on there being no readers? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| For no time at all. Even if synchronize_rcu() were to wait until | +| all readers had completed, a new reader might start immediately after | +| synchronize_rcu() completed. Therefore, the code following | +| synchronize_rcu() can *never* rely on there being no readers. | ++-----------------------------------------------------------------------+ + +Grace Periods Don't Partition Read-Side Critical Sections +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +It is tempting to assume that if any part of one RCU read-side critical +section precedes a given grace period, and if any part of another RCU +read-side critical section follows that same grace period, then all of +the first RCU read-side critical section must precede all of the second. +However, this just isn't the case: A single grace period does not +partition the set of RCU read-side critical sections. An example of this +situation can be illustrated as follows, where ``x``, ``y``, and ``z`` +are initially all zero: + + :: + + 1 void thread0(void) + 2 { + 3 rcu_read_lock(); + 4 WRITE_ONCE(a, 1); + 5 WRITE_ONCE(b, 1); + 6 rcu_read_unlock(); + 7 } + 8 + 9 void thread1(void) + 10 { + 11 r1 = READ_ONCE(a); + 12 synchronize_rcu(); + 13 WRITE_ONCE(c, 1); + 14 } + 15 + 16 void thread2(void) + 17 { + 18 rcu_read_lock(); + 19 r2 = READ_ONCE(b); + 20 r3 = READ_ONCE(c); + 21 rcu_read_unlock(); + 22 } + +It turns out that the outcome: + + :: + + (r1 == 1 && r2 == 0 && r3 == 1) + +is entirely possible. The following figure show how this can happen, +with each circled ``QS`` indicating the point at which RCU recorded a +*quiescent state* for each thread, that is, a state in which RCU knows +that the thread cannot be in the midst of an RCU read-side critical +section that started before the current grace period: + +.. kernel-figure:: GPpartitionReaders1.svg + +If it is necessary to partition RCU read-side critical sections in this +manner, it is necessary to use two grace periods, where the first grace +period is known to end before the second grace period starts: + + :: + + 1 void thread0(void) + 2 { + 3 rcu_read_lock(); + 4 WRITE_ONCE(a, 1); + 5 WRITE_ONCE(b, 1); + 6 rcu_read_unlock(); + 7 } + 8 + 9 void thread1(void) + 10 { + 11 r1 = READ_ONCE(a); + 12 synchronize_rcu(); + 13 WRITE_ONCE(c, 1); + 14 } + 15 + 16 void thread2(void) + 17 { + 18 r2 = READ_ONCE(c); + 19 synchronize_rcu(); + 20 WRITE_ONCE(d, 1); + 21 } + 22 + 23 void thread3(void) + 24 { + 25 rcu_read_lock(); + 26 r3 = READ_ONCE(b); + 27 r4 = READ_ONCE(d); + 28 rcu_read_unlock(); + 29 } + +Here, if ``(r1 == 1)``, then thread0()'s write to ``b`` must happen +before the end of thread1()'s grace period. If in addition +``(r4 == 1)``, then thread3()'s read from ``b`` must happen after +the beginning of thread2()'s grace period. If it is also the case +that ``(r2 == 1)``, then the end of thread1()'s grace period must +precede the beginning of thread2()'s grace period. This mean that +the two RCU read-side critical sections cannot overlap, guaranteeing +that ``(r3 == 1)``. As a result, the outcome: + + :: + + (r1 == 1 && r2 == 1 && r3 == 0 && r4 == 1) + +cannot happen. + +This non-requirement was also non-premeditated, but became apparent when +studying RCU's interaction with memory ordering. + +Read-Side Critical Sections Don't Partition Grace Periods +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +It is also tempting to assume that if an RCU read-side critical section +happens between a pair of grace periods, then those grace periods cannot +overlap. However, this temptation leads nowhere good, as can be +illustrated by the following, with all variables initially zero: + + :: + + 1 void thread0(void) + 2 { + 3 rcu_read_lock(); + 4 WRITE_ONCE(a, 1); + 5 WRITE_ONCE(b, 1); + 6 rcu_read_unlock(); + 7 } + 8 + 9 void thread1(void) + 10 { + 11 r1 = READ_ONCE(a); + 12 synchronize_rcu(); + 13 WRITE_ONCE(c, 1); + 14 } + 15 + 16 void thread2(void) + 17 { + 18 rcu_read_lock(); + 19 WRITE_ONCE(d, 1); + 20 r2 = READ_ONCE(c); + 21 rcu_read_unlock(); + 22 } + 23 + 24 void thread3(void) + 25 { + 26 r3 = READ_ONCE(d); + 27 synchronize_rcu(); + 28 WRITE_ONCE(e, 1); + 29 } + 30 + 31 void thread4(void) + 32 { + 33 rcu_read_lock(); + 34 r4 = READ_ONCE(b); + 35 r5 = READ_ONCE(e); + 36 rcu_read_unlock(); + 37 } + +In this case, the outcome: + + :: + + (r1 == 1 && r2 == 1 && r3 == 1 && r4 == 0 && r5 == 1) + +is entirely possible, as illustrated below: + +.. kernel-figure:: ReadersPartitionGP1.svg + +Again, an RCU read-side critical section can overlap almost all of a +given grace period, just so long as it does not overlap the entire grace +period. As a result, an RCU read-side critical section cannot partition +a pair of RCU grace periods. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| How long a sequence of grace periods, each separated by an RCU | +| read-side critical section, would be required to partition the RCU | +| read-side critical sections at the beginning and end of the chain? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| In theory, an infinite number. In practice, an unknown number that is | +| sensitive to both implementation details and timing considerations. | +| Therefore, even in practice, RCU users must abide by the theoretical | +| rather than the practical answer. | ++-----------------------------------------------------------------------+ + +Parallelism Facts of Life +------------------------- + +These parallelism facts of life are by no means specific to RCU, but the +RCU implementation must abide by them. They therefore bear repeating: + +#. Any CPU or task may be delayed at any time, and any attempts to avoid + these delays by disabling preemption, interrupts, or whatever are + completely futile. This is most obvious in preemptible user-level + environments and in virtualized environments (where a given guest + OS's VCPUs can be preempted at any time by the underlying + hypervisor), but can also happen in bare-metal environments due to + ECC errors, NMIs, and other hardware events. Although a delay of more + than about 20 seconds can result in splats, the RCU implementation is + obligated to use algorithms that can tolerate extremely long delays, + but where “extremely long” is not long enough to allow wrap-around + when incrementing a 64-bit counter. +#. Both the compiler and the CPU can reorder memory accesses. Where it + matters, RCU must use compiler directives and memory-barrier + instructions to preserve ordering. +#. Conflicting writes to memory locations in any given cache line will + result in expensive cache misses. Greater numbers of concurrent + writes and more-frequent concurrent writes will result in more + dramatic slowdowns. RCU is therefore obligated to use algorithms that + have sufficient locality to avoid significant performance and + scalability problems. +#. As a rough rule of thumb, only one CPU's worth of processing may be + carried out under the protection of any given exclusive lock. RCU + must therefore use scalable locking designs. +#. Counters are finite, especially on 32-bit systems. RCU's use of + counters must therefore tolerate counter wrap, or be designed such + that counter wrap would take way more time than a single system is + likely to run. An uptime of ten years is quite possible, a runtime of + a century much less so. As an example of the latter, RCU's + dyntick-idle nesting counter allows 54 bits for interrupt nesting + level (this counter is 64 bits even on a 32-bit system). Overflowing + this counter requires 2\ :sup:`54` half-interrupts on a given CPU + without that CPU ever going idle. If a half-interrupt happened every + microsecond, it would take 570 years of runtime to overflow this + counter, which is currently believed to be an acceptably long time. +#. Linux systems can have thousands of CPUs running a single Linux + kernel in a single shared-memory environment. RCU must therefore pay + close attention to high-end scalability. + +This last parallelism fact of life means that RCU must pay special +attention to the preceding facts of life. The idea that Linux might +scale to systems with thousands of CPUs would have been met with some +skepticism in the 1990s, but these requirements would have otherwise +have been unsurprising, even in the early 1990s. + +Quality-of-Implementation Requirements +-------------------------------------- + +These sections list quality-of-implementation requirements. Although an +RCU implementation that ignores these requirements could still be used, +it would likely be subject to limitations that would make it +inappropriate for industrial-strength production use. Classes of +quality-of-implementation requirements are as follows: + +#. `Specialization`_ +#. `Performance and Scalability`_ +#. `Forward Progress`_ +#. `Composability`_ +#. `Corner Cases`_ + +These classes is covered in the following sections. + +Specialization +~~~~~~~~~~~~~~ + +RCU is and always has been intended primarily for read-mostly +situations, which means that RCU's read-side primitives are optimized, +often at the expense of its update-side primitives. Experience thus far +is captured by the following list of situations: + +#. Read-mostly data, where stale and inconsistent data is not a problem: + RCU works great! +#. Read-mostly data, where data must be consistent: RCU works well. +#. Read-write data, where data must be consistent: RCU *might* work OK. + Or not. +#. Write-mostly data, where data must be consistent: RCU is very + unlikely to be the right tool for the job, with the following + exceptions, where RCU can provide: + + a. Existence guarantees for update-friendly mechanisms. + b. Wait-free read-side primitives for real-time use. + +This focus on read-mostly situations means that RCU must interoperate +with other synchronization primitives. For example, the add_gp() and +remove_gp_synchronous() examples discussed earlier use RCU to +protect readers and locking to coordinate updaters. However, the need +extends much farther, requiring that a variety of synchronization +primitives be legal within RCU read-side critical sections, including +spinlocks, sequence locks, atomic operations, reference counters, and +memory barriers. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| What about sleeping locks? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| These are forbidden within Linux-kernel RCU read-side critical | +| sections because it is not legal to place a quiescent state (in this | +| case, voluntary context switch) within an RCU read-side critical | +| section. However, sleeping locks may be used within userspace RCU | +| read-side critical sections, and also within Linux-kernel sleepable | +| RCU `(SRCU) <Sleepable RCU_>`__ read-side critical sections. In | +| addition, the -rt patchset turns spinlocks into a sleeping locks so | +| that the corresponding critical sections can be preempted, which also | +| means that these sleeplockified spinlocks (but not other sleeping | +| locks!) may be acquire within -rt-Linux-kernel RCU read-side critical | +| sections. | +| Note that it *is* legal for a normal RCU read-side critical section | +| to conditionally acquire a sleeping locks (as in | +| mutex_trylock()), but only as long as it does not loop | +| indefinitely attempting to conditionally acquire that sleeping locks. | +| The key point is that things like mutex_trylock() either return | +| with the mutex held, or return an error indication if the mutex was | +| not immediately available. Either way, mutex_trylock() returns | +| immediately without sleeping. | ++-----------------------------------------------------------------------+ + +It often comes as a surprise that many algorithms do not require a +consistent view of data, but many can function in that mode, with +network routing being the poster child. Internet routing algorithms take +significant time to propagate updates, so that by the time an update +arrives at a given system, that system has been sending network traffic +the wrong way for a considerable length of time. Having a few threads +continue to send traffic the wrong way for a few more milliseconds is +clearly not a problem: In the worst case, TCP retransmissions will +eventually get the data where it needs to go. In general, when tracking +the state of the universe outside of the computer, some level of +inconsistency must be tolerated due to speed-of-light delays if nothing +else. + +Furthermore, uncertainty about external state is inherent in many cases. +For example, a pair of veterinarians might use heartbeat to determine +whether or not a given cat was alive. But how long should they wait +after the last heartbeat to decide that the cat is in fact dead? Waiting +less than 400 milliseconds makes no sense because this would mean that a +relaxed cat would be considered to cycle between death and life more +than 100 times per minute. Moreover, just as with human beings, a cat's +heart might stop for some period of time, so the exact wait period is a +judgment call. One of our pair of veterinarians might wait 30 seconds +before pronouncing the cat dead, while the other might insist on waiting +a full minute. The two veterinarians would then disagree on the state of +the cat during the final 30 seconds of the minute following the last +heartbeat. + +Interestingly enough, this same situation applies to hardware. When push +comes to shove, how do we tell whether or not some external server has +failed? We send messages to it periodically, and declare it failed if we +don't receive a response within a given period of time. Policy decisions +can usually tolerate short periods of inconsistency. The policy was +decided some time ago, and is only now being put into effect, so a few +milliseconds of delay is normally inconsequential. + +However, there are algorithms that absolutely must see consistent data. +For example, the translation between a user-level SystemV semaphore ID +to the corresponding in-kernel data structure is protected by RCU, but +it is absolutely forbidden to update a semaphore that has just been +removed. In the Linux kernel, this need for consistency is accommodated +by acquiring spinlocks located in the in-kernel data structure from +within the RCU read-side critical section, and this is indicated by the +green box in the figure above. Many other techniques may be used, and +are in fact used within the Linux kernel. + +In short, RCU is not required to maintain consistency, and other +mechanisms may be used in concert with RCU when consistency is required. +RCU's specialization allows it to do its job extremely well, and its +ability to interoperate with other synchronization mechanisms allows the +right mix of synchronization tools to be used for a given job. + +Performance and Scalability +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Energy efficiency is a critical component of performance today, and +Linux-kernel RCU implementations must therefore avoid unnecessarily +awakening idle CPUs. I cannot claim that this requirement was +premeditated. In fact, I learned of it during a telephone conversation +in which I was given “frank and open” feedback on the importance of +energy efficiency in battery-powered systems and on specific +energy-efficiency shortcomings of the Linux-kernel RCU implementation. +In my experience, the battery-powered embedded community will consider +any unnecessary wakeups to be extremely unfriendly acts. So much so that +mere Linux-kernel-mailing-list posts are insufficient to vent their ire. + +Memory consumption is not particularly important for in most situations, +and has become decreasingly so as memory sizes have expanded and memory +costs have plummeted. However, as I learned from Matt Mackall's +`bloatwatch <http://elinux.org/Linux_Tiny-FAQ>`__ efforts, memory +footprint is critically important on single-CPU systems with +non-preemptible (``CONFIG_PREEMPTION=n``) kernels, and thus `tiny +RCU <https://lore.kernel.org/r/20090113221724.GA15307@linux.vnet.ibm.com>`__ +was born. Josh Triplett has since taken over the small-memory banner +with his `Linux kernel tinification <https://tiny.wiki.kernel.org/>`__ +project, which resulted in `SRCU <Sleepable RCU_>`__ becoming optional +for those kernels not needing it. + +The remaining performance requirements are, for the most part, +unsurprising. For example, in keeping with RCU's read-side +specialization, rcu_dereference() should have negligible overhead +(for example, suppression of a few minor compiler optimizations). +Similarly, in non-preemptible environments, rcu_read_lock() and +rcu_read_unlock() should have exactly zero overhead. + +In preemptible environments, in the case where the RCU read-side +critical section was not preempted (as will be the case for the +highest-priority real-time process), rcu_read_lock() and +rcu_read_unlock() should have minimal overhead. In particular, they +should not contain atomic read-modify-write operations, memory-barrier +instructions, preemption disabling, interrupt disabling, or backwards +branches. However, in the case where the RCU read-side critical section +was preempted, rcu_read_unlock() may acquire spinlocks and disable +interrupts. This is why it is better to nest an RCU read-side critical +section within a preempt-disable region than vice versa, at least in +cases where that critical section is short enough to avoid unduly +degrading real-time latencies. + +The synchronize_rcu() grace-period-wait primitive is optimized for +throughput. It may therefore incur several milliseconds of latency in +addition to the duration of the longest RCU read-side critical section. +On the other hand, multiple concurrent invocations of +synchronize_rcu() are required to use batching optimizations so that +they can be satisfied by a single underlying grace-period-wait +operation. For example, in the Linux kernel, it is not unusual for a +single grace-period-wait operation to serve more than `1,000 separate +invocations <https://www.usenix.org/conference/2004-usenix-annual-technical-conference/making-rcu-safe-deep-sub-millisecond-response>`__ +of synchronize_rcu(), thus amortizing the per-invocation overhead +down to nearly zero. However, the grace-period optimization is also +required to avoid measurable degradation of real-time scheduling and +interrupt latencies. + +In some cases, the multi-millisecond synchronize_rcu() latencies are +unacceptable. In these cases, synchronize_rcu_expedited() may be +used instead, reducing the grace-period latency down to a few tens of +microseconds on small systems, at least in cases where the RCU read-side +critical sections are short. There are currently no special latency +requirements for synchronize_rcu_expedited() on large systems, but, +consistent with the empirical nature of the RCU specification, that is +subject to change. However, there most definitely are scalability +requirements: A storm of synchronize_rcu_expedited() invocations on +4096 CPUs should at least make reasonable forward progress. In return +for its shorter latencies, synchronize_rcu_expedited() is permitted +to impose modest degradation of real-time latency on non-idle online +CPUs. Here, “modest” means roughly the same latency degradation as a +scheduling-clock interrupt. + +There are a number of situations where even +synchronize_rcu_expedited()'s reduced grace-period latency is +unacceptable. In these situations, the asynchronous call_rcu() can +be used in place of synchronize_rcu() as follows: + + :: + + 1 struct foo { + 2 int a; + 3 int b; + 4 struct rcu_head rh; + 5 }; + 6 + 7 static void remove_gp_cb(struct rcu_head *rhp) + 8 { + 9 struct foo *p = container_of(rhp, struct foo, rh); + 10 + 11 kfree(p); + 12 } + 13 + 14 bool remove_gp_asynchronous(void) + 15 { + 16 struct foo *p; + 17 + 18 spin_lock(&gp_lock); + 19 p = rcu_access_pointer(gp); + 20 if (!p) { + 21 spin_unlock(&gp_lock); + 22 return false; + 23 } + 24 rcu_assign_pointer(gp, NULL); + 25 call_rcu(&p->rh, remove_gp_cb); + 26 spin_unlock(&gp_lock); + 27 return true; + 28 } + +A definition of ``struct foo`` is finally needed, and appears on +lines 1-5. The function remove_gp_cb() is passed to call_rcu() +on line 25, and will be invoked after the end of a subsequent grace +period. This gets the same effect as remove_gp_synchronous(), but +without forcing the updater to wait for a grace period to elapse. The +call_rcu() function may be used in a number of situations where +neither synchronize_rcu() nor synchronize_rcu_expedited() would +be legal, including within preempt-disable code, local_bh_disable() +code, interrupt-disable code, and interrupt handlers. However, even +call_rcu() is illegal within NMI handlers and from idle and offline +CPUs. The callback function (remove_gp_cb() in this case) will be +executed within softirq (software interrupt) environment within the +Linux kernel, either within a real softirq handler or under the +protection of local_bh_disable(). In both the Linux kernel and in +userspace, it is bad practice to write an RCU callback function that +takes too long. Long-running operations should be relegated to separate +threads or (in the Linux kernel) workqueues. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why does line 19 use rcu_access_pointer()? After all, | +| call_rcu() on line 25 stores into the structure, which would | +| interact badly with concurrent insertions. Doesn't this mean that | +| rcu_dereference() is required? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Presumably the ``->gp_lock`` acquired on line 18 excludes any | +| changes, including any insertions that rcu_dereference() would | +| protect against. Therefore, any insertions will be delayed until | +| after ``->gp_lock`` is released on line 25, which in turn means that | +| rcu_access_pointer() suffices. | ++-----------------------------------------------------------------------+ + +However, all that remove_gp_cb() is doing is invoking kfree() on +the data element. This is a common idiom, and is supported by +kfree_rcu(), which allows “fire and forget” operation as shown +below: + + :: + + 1 struct foo { + 2 int a; + 3 int b; + 4 struct rcu_head rh; + 5 }; + 6 + 7 bool remove_gp_faf(void) + 8 { + 9 struct foo *p; + 10 + 11 spin_lock(&gp_lock); + 12 p = rcu_dereference(gp); + 13 if (!p) { + 14 spin_unlock(&gp_lock); + 15 return false; + 16 } + 17 rcu_assign_pointer(gp, NULL); + 18 kfree_rcu(p, rh); + 19 spin_unlock(&gp_lock); + 20 return true; + 21 } + +Note that remove_gp_faf() simply invokes kfree_rcu() and +proceeds, without any need to pay any further attention to the +subsequent grace period and kfree(). It is permissible to invoke +kfree_rcu() from the same environments as for call_rcu(). +Interestingly enough, DYNIX/ptx had the equivalents of call_rcu() +and kfree_rcu(), but not synchronize_rcu(). This was due to the +fact that RCU was not heavily used within DYNIX/ptx, so the very few +places that needed something like synchronize_rcu() simply +open-coded it. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Earlier it was claimed that call_rcu() and kfree_rcu() | +| allowed updaters to avoid being blocked by readers. But how can that | +| be correct, given that the invocation of the callback and the freeing | +| of the memory (respectively) must still wait for a grace period to | +| elapse? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| We could define things this way, but keep in mind that this sort of | +| definition would say that updates in garbage-collected languages | +| cannot complete until the next time the garbage collector runs, which | +| does not seem at all reasonable. The key point is that in most cases, | +| an updater using either call_rcu() or kfree_rcu() can proceed | +| to the next update as soon as it has invoked call_rcu() or | +| kfree_rcu(), without having to wait for a subsequent grace | +| period. | ++-----------------------------------------------------------------------+ + +But what if the updater must wait for the completion of code to be +executed after the end of the grace period, but has other tasks that can +be carried out in the meantime? The polling-style +get_state_synchronize_rcu() and cond_synchronize_rcu() functions +may be used for this purpose, as shown below: + + :: + + 1 bool remove_gp_poll(void) + 2 { + 3 struct foo *p; + 4 unsigned long s; + 5 + 6 spin_lock(&gp_lock); + 7 p = rcu_access_pointer(gp); + 8 if (!p) { + 9 spin_unlock(&gp_lock); + 10 return false; + 11 } + 12 rcu_assign_pointer(gp, NULL); + 13 spin_unlock(&gp_lock); + 14 s = get_state_synchronize_rcu(); + 15 do_something_while_waiting(); + 16 cond_synchronize_rcu(s); + 17 kfree(p); + 18 return true; + 19 } + +On line 14, get_state_synchronize_rcu() obtains a “cookie” from RCU, +then line 15 carries out other tasks, and finally, line 16 returns +immediately if a grace period has elapsed in the meantime, but otherwise +waits as required. The need for ``get_state_synchronize_rcu`` and +cond_synchronize_rcu() has appeared quite recently, so it is too +early to tell whether they will stand the test of time. + +RCU thus provides a range of tools to allow updaters to strike the +required tradeoff between latency, flexibility and CPU overhead. + +Forward Progress +~~~~~~~~~~~~~~~~ + +In theory, delaying grace-period completion and callback invocation is +harmless. In practice, not only are memory sizes finite but also +callbacks sometimes do wakeups, and sufficiently deferred wakeups can be +difficult to distinguish from system hangs. Therefore, RCU must provide +a number of mechanisms to promote forward progress. + +These mechanisms are not foolproof, nor can they be. For one simple +example, an infinite loop in an RCU read-side critical section must by +definition prevent later grace periods from ever completing. For a more +involved example, consider a 64-CPU system built with +``CONFIG_RCU_NOCB_CPU=y`` and booted with ``rcu_nocbs=1-63``, where +CPUs 1 through 63 spin in tight loops that invoke call_rcu(). Even +if these tight loops also contain calls to cond_resched() (thus +allowing grace periods to complete), CPU 0 simply will not be able to +invoke callbacks as fast as the other 63 CPUs can register them, at +least not until the system runs out of memory. In both of these +examples, the Spiderman principle applies: With great power comes great +responsibility. However, short of this level of abuse, RCU is required +to ensure timely completion of grace periods and timely invocation of +callbacks. + +RCU takes the following steps to encourage timely completion of grace +periods: + +#. If a grace period fails to complete within 100 milliseconds, RCU + causes future invocations of cond_resched() on the holdout CPUs + to provide an RCU quiescent state. RCU also causes those CPUs' + need_resched() invocations to return ``true``, but only after the + corresponding CPU's next scheduling-clock. +#. CPUs mentioned in the ``nohz_full`` kernel boot parameter can run + indefinitely in the kernel without scheduling-clock interrupts, which + defeats the above need_resched() strategem. RCU will therefore + invoke resched_cpu() on any ``nohz_full`` CPUs still holding out + after 109 milliseconds. +#. In kernels built with ``CONFIG_RCU_BOOST=y``, if a given task that + has been preempted within an RCU read-side critical section is + holding out for more than 500 milliseconds, RCU will resort to + priority boosting. +#. If a CPU is still holding out 10 seconds into the grace period, RCU + will invoke resched_cpu() on it regardless of its ``nohz_full`` + state. + +The above values are defaults for systems running with ``HZ=1000``. They +will vary as the value of ``HZ`` varies, and can also be changed using +the relevant Kconfig options and kernel boot parameters. RCU currently +does not do much sanity checking of these parameters, so please use +caution when changing them. Note that these forward-progress measures +are provided only for RCU, not for `SRCU <Sleepable RCU_>`__ or `Tasks +RCU`_. + +RCU takes the following steps in call_rcu() to encourage timely +invocation of callbacks when any given non-\ ``rcu_nocbs`` CPU has +10,000 callbacks, or has 10,000 more callbacks than it had the last time +encouragement was provided: + +#. Starts a grace period, if one is not already in progress. +#. Forces immediate checking for quiescent states, rather than waiting + for three milliseconds to have elapsed since the beginning of the + grace period. +#. Immediately tags the CPU's callbacks with their grace period + completion numbers, rather than waiting for the ``RCU_SOFTIRQ`` + handler to get around to it. +#. Lifts callback-execution batch limits, which speeds up callback + invocation at the expense of degrading realtime response. + +Again, these are default values when running at ``HZ=1000``, and can be +overridden. Again, these forward-progress measures are provided only for +RCU, not for `SRCU <Sleepable RCU_>`__ or `Tasks +RCU`_. Even for RCU, callback-invocation forward +progress for ``rcu_nocbs`` CPUs is much less well-developed, in part +because workloads benefiting from ``rcu_nocbs`` CPUs tend to invoke +call_rcu() relatively infrequently. If workloads emerge that need +both ``rcu_nocbs`` CPUs and high call_rcu() invocation rates, then +additional forward-progress work will be required. + +Composability +~~~~~~~~~~~~~ + +Composability has received much attention in recent years, perhaps in +part due to the collision of multicore hardware with object-oriented +techniques designed in single-threaded environments for single-threaded +use. And in theory, RCU read-side critical sections may be composed, and +in fact may be nested arbitrarily deeply. In practice, as with all +real-world implementations of composable constructs, there are +limitations. + +Implementations of RCU for which rcu_read_lock() and +rcu_read_unlock() generate no code, such as Linux-kernel RCU when +``CONFIG_PREEMPTION=n``, can be nested arbitrarily deeply. After all, there +is no overhead. Except that if all these instances of +rcu_read_lock() and rcu_read_unlock() are visible to the +compiler, compilation will eventually fail due to exhausting memory, +mass storage, or user patience, whichever comes first. If the nesting is +not visible to the compiler, as is the case with mutually recursive +functions each in its own translation unit, stack overflow will result. +If the nesting takes the form of loops, perhaps in the guise of tail +recursion, either the control variable will overflow or (in the Linux +kernel) you will get an RCU CPU stall warning. Nevertheless, this class +of RCU implementations is one of the most composable constructs in +existence. + +RCU implementations that explicitly track nesting depth are limited by +the nesting-depth counter. For example, the Linux kernel's preemptible +RCU limits nesting to ``INT_MAX``. This should suffice for almost all +practical purposes. That said, a consecutive pair of RCU read-side +critical sections between which there is an operation that waits for a +grace period cannot be enclosed in another RCU read-side critical +section. This is because it is not legal to wait for a grace period +within an RCU read-side critical section: To do so would result either +in deadlock or in RCU implicitly splitting the enclosing RCU read-side +critical section, neither of which is conducive to a long-lived and +prosperous kernel. + +It is worth noting that RCU is not alone in limiting composability. For +example, many transactional-memory implementations prohibit composing a +pair of transactions separated by an irrevocable operation (for example, +a network receive operation). For another example, lock-based critical +sections can be composed surprisingly freely, but only if deadlock is +avoided. + +In short, although RCU read-side critical sections are highly +composable, care is required in some situations, just as is the case for +any other composable synchronization mechanism. + +Corner Cases +~~~~~~~~~~~~ + +A given RCU workload might have an endless and intense stream of RCU +read-side critical sections, perhaps even so intense that there was +never a point in time during which there was not at least one RCU +read-side critical section in flight. RCU cannot allow this situation to +block grace periods: As long as all the RCU read-side critical sections +are finite, grace periods must also be finite. + +That said, preemptible RCU implementations could potentially result in +RCU read-side critical sections being preempted for long durations, +which has the effect of creating a long-duration RCU read-side critical +section. This situation can arise only in heavily loaded systems, but +systems using real-time priorities are of course more vulnerable. +Therefore, RCU priority boosting is provided to help deal with this +case. That said, the exact requirements on RCU priority boosting will +likely evolve as more experience accumulates. + +Other workloads might have very high update rates. Although one can +argue that such workloads should instead use something other than RCU, +the fact remains that RCU must handle such workloads gracefully. This +requirement is another factor driving batching of grace periods, but it +is also the driving force behind the checks for large numbers of queued +RCU callbacks in the call_rcu() code path. Finally, high update +rates should not delay RCU read-side critical sections, although some +small read-side delays can occur when using +synchronize_rcu_expedited(), courtesy of this function's use of +smp_call_function_single(). + +Although all three of these corner cases were understood in the early +1990s, a simple user-level test consisting of ``close(open(path))`` in a +tight loop in the early 2000s suddenly provided a much deeper +appreciation of the high-update-rate corner case. This test also +motivated addition of some RCU code to react to high update rates, for +example, if a given CPU finds itself with more than 10,000 RCU callbacks +queued, it will cause RCU to take evasive action by more aggressively +starting grace periods and more aggressively forcing completion of +grace-period processing. This evasive action causes the grace period to +complete more quickly, but at the cost of restricting RCU's batching +optimizations, thus increasing the CPU overhead incurred by that grace +period. + +Software-Engineering Requirements +--------------------------------- + +Between Murphy's Law and “To err is human”, it is necessary to guard +against mishaps and misuse: + +#. It is all too easy to forget to use rcu_read_lock() everywhere + that it is needed, so kernels built with ``CONFIG_PROVE_RCU=y`` will + splat if rcu_dereference() is used outside of an RCU read-side + critical section. Update-side code can use + rcu_dereference_protected(), which takes a `lockdep + expression <https://lwn.net/Articles/371986/>`__ to indicate what is + providing the protection. If the indicated protection is not + provided, a lockdep splat is emitted. + Code shared between readers and updaters can use + rcu_dereference_check(), which also takes a lockdep expression, + and emits a lockdep splat if neither rcu_read_lock() nor the + indicated protection is in place. In addition, + rcu_dereference_raw() is used in those (hopefully rare) cases + where the required protection cannot be easily described. Finally, + rcu_read_lock_held() is provided to allow a function to verify + that it has been invoked within an RCU read-side critical section. I + was made aware of this set of requirements shortly after Thomas + Gleixner audited a number of RCU uses. +#. A given function might wish to check for RCU-related preconditions + upon entry, before using any other RCU API. The + rcu_lockdep_assert() does this job, asserting the expression in + kernels having lockdep enabled and doing nothing otherwise. +#. It is also easy to forget to use rcu_assign_pointer() and + rcu_dereference(), perhaps (incorrectly) substituting a simple + assignment. To catch this sort of error, a given RCU-protected + pointer may be tagged with ``__rcu``, after which sparse will + complain about simple-assignment accesses to that pointer. Arnd + Bergmann made me aware of this requirement, and also supplied the + needed `patch series <https://lwn.net/Articles/376011/>`__. +#. Kernels built with ``CONFIG_DEBUG_OBJECTS_RCU_HEAD=y`` will splat if + a data element is passed to call_rcu() twice in a row, without a + grace period in between. (This error is similar to a double free.) + The corresponding ``rcu_head`` structures that are dynamically + allocated are automatically tracked, but ``rcu_head`` structures + allocated on the stack must be initialized with + init_rcu_head_on_stack() and cleaned up with + destroy_rcu_head_on_stack(). Similarly, statically allocated + non-stack ``rcu_head`` structures must be initialized with + init_rcu_head() and cleaned up with destroy_rcu_head(). + Mathieu Desnoyers made me aware of this requirement, and also + supplied the needed + `patch <https://lore.kernel.org/r/20100319013024.GA28456@Krystal>`__. +#. An infinite loop in an RCU read-side critical section will eventually + trigger an RCU CPU stall warning splat, with the duration of + “eventually” being controlled by the ``RCU_CPU_STALL_TIMEOUT`` + ``Kconfig`` option, or, alternatively, by the + ``rcupdate.rcu_cpu_stall_timeout`` boot/sysfs parameter. However, RCU + is not obligated to produce this splat unless there is a grace period + waiting on that particular RCU read-side critical section. + + Some extreme workloads might intentionally delay RCU grace periods, + and systems running those workloads can be booted with + ``rcupdate.rcu_cpu_stall_suppress`` to suppress the splats. This + kernel parameter may also be set via ``sysfs``. Furthermore, RCU CPU + stall warnings are counter-productive during sysrq dumps and during + panics. RCU therefore supplies the rcu_sysrq_start() and + rcu_sysrq_end() API members to be called before and after long + sysrq dumps. RCU also supplies the rcu_panic() notifier that is + automatically invoked at the beginning of a panic to suppress further + RCU CPU stall warnings. + + This requirement made itself known in the early 1990s, pretty much + the first time that it was necessary to debug a CPU stall. That said, + the initial implementation in DYNIX/ptx was quite generic in + comparison with that of Linux. + +#. Although it would be very good to detect pointers leaking out of RCU + read-side critical sections, there is currently no good way of doing + this. One complication is the need to distinguish between pointers + leaking and pointers that have been handed off from RCU to some other + synchronization mechanism, for example, reference counting. +#. In kernels built with ``CONFIG_RCU_TRACE=y``, RCU-related information + is provided via event tracing. +#. Open-coded use of rcu_assign_pointer() and rcu_dereference() + to create typical linked data structures can be surprisingly + error-prone. Therefore, RCU-protected `linked + lists <https://lwn.net/Articles/609973/#RCU%20List%20APIs>`__ and, + more recently, RCU-protected `hash + tables <https://lwn.net/Articles/612100/>`__ are available. Many + other special-purpose RCU-protected data structures are available in + the Linux kernel and the userspace RCU library. +#. Some linked structures are created at compile time, but still require + ``__rcu`` checking. The RCU_POINTER_INITIALIZER() macro serves + this purpose. +#. It is not necessary to use rcu_assign_pointer() when creating + linked structures that are to be published via a single external + pointer. The RCU_INIT_POINTER() macro is provided for this task. + +This not a hard-and-fast list: RCU's diagnostic capabilities will +continue to be guided by the number and type of usage bugs found in +real-world RCU usage. + +Linux Kernel Complications +-------------------------- + +The Linux kernel provides an interesting environment for all kinds of +software, including RCU. Some of the relevant points of interest are as +follows: + +#. `Configuration`_ +#. `Firmware Interface`_ +#. `Early Boot`_ +#. `Interrupts and NMIs`_ +#. `Loadable Modules`_ +#. `Hotplug CPU`_ +#. `Scheduler and RCU`_ +#. `Tracing and RCU`_ +#. `Accesses to User Memory and RCU`_ +#. `Energy Efficiency`_ +#. `Scheduling-Clock Interrupts and RCU`_ +#. `Memory Efficiency`_ +#. `Performance, Scalability, Response Time, and Reliability`_ + +This list is probably incomplete, but it does give a feel for the most +notable Linux-kernel complications. Each of the following sections +covers one of the above topics. + +Configuration +~~~~~~~~~~~~~ + +RCU's goal is automatic configuration, so that almost nobody needs to +worry about RCU's ``Kconfig`` options. And for almost all users, RCU +does in fact work well “out of the box.” + +However, there are specialized use cases that are handled by kernel boot +parameters and ``Kconfig`` options. Unfortunately, the ``Kconfig`` +system will explicitly ask users about new ``Kconfig`` options, which +requires almost all of them be hidden behind a ``CONFIG_RCU_EXPERT`` +``Kconfig`` option. + +This all should be quite obvious, but the fact remains that Linus +Torvalds recently had to +`remind <https://lore.kernel.org/r/CA+55aFy4wcCwaL4okTs8wXhGZ5h-ibecy_Meg9C4MNQrUnwMcg@mail.gmail.com>`__ +me of this requirement. + +Firmware Interface +~~~~~~~~~~~~~~~~~~ + +In many cases, kernel obtains information about the system from the +firmware, and sometimes things are lost in translation. Or the +translation is accurate, but the original message is bogus. + +For example, some systems' firmware overreports the number of CPUs, +sometimes by a large factor. If RCU naively believed the firmware, as it +used to do, it would create too many per-CPU kthreads. Although the +resulting system will still run correctly, the extra kthreads needlessly +consume memory and can cause confusion when they show up in ``ps`` +listings. + +RCU must therefore wait for a given CPU to actually come online before +it can allow itself to believe that the CPU actually exists. The +resulting “ghost CPUs” (which are never going to come online) cause a +number of `interesting +complications <https://paulmck.livejournal.com/37494.html>`__. + +Early Boot +~~~~~~~~~~ + +The Linux kernel's boot sequence is an interesting process, and RCU is +used early, even before rcu_init() is invoked. In fact, a number of +RCU's primitives can be used as soon as the initial task's +``task_struct`` is available and the boot CPU's per-CPU variables are +set up. The read-side primitives (rcu_read_lock(), +rcu_read_unlock(), rcu_dereference(), and +rcu_access_pointer()) will operate normally very early on, as will +rcu_assign_pointer(). + +Although call_rcu() may be invoked at any time during boot, +callbacks are not guaranteed to be invoked until after all of RCU's +kthreads have been spawned, which occurs at early_initcall() time. +This delay in callback invocation is due to the fact that RCU does not +invoke callbacks until it is fully initialized, and this full +initialization cannot occur until after the scheduler has initialized +itself to the point where RCU can spawn and run its kthreads. In theory, +it would be possible to invoke callbacks earlier, however, this is not a +panacea because there would be severe restrictions on what operations +those callbacks could invoke. + +Perhaps surprisingly, synchronize_rcu() and +synchronize_rcu_expedited(), will operate normally during very early +boot, the reason being that there is only one CPU and preemption is +disabled. This means that the call synchronize_rcu() (or friends) +itself is a quiescent state and thus a grace period, so the early-boot +implementation can be a no-op. + +However, once the scheduler has spawned its first kthread, this early +boot trick fails for synchronize_rcu() (as well as for +synchronize_rcu_expedited()) in ``CONFIG_PREEMPTION=y`` kernels. The +reason is that an RCU read-side critical section might be preempted, +which means that a subsequent synchronize_rcu() really does have to +wait for something, as opposed to simply returning immediately. +Unfortunately, synchronize_rcu() can't do this until all of its +kthreads are spawned, which doesn't happen until some time during +early_initcalls() time. But this is no excuse: RCU is nevertheless +required to correctly handle synchronous grace periods during this time +period. Once all of its kthreads are up and running, RCU starts running +normally. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| How can RCU possibly handle grace periods before all of its kthreads | +| have been spawned??? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Very carefully! | +| During the “dead zone” between the time that the scheduler spawns the | +| first task and the time that all of RCU's kthreads have been spawned, | +| all synchronous grace periods are handled by the expedited | +| grace-period mechanism. At runtime, this expedited mechanism relies | +| on workqueues, but during the dead zone the requesting task itself | +| drives the desired expedited grace period. Because dead-zone | +| execution takes place within task context, everything works. Once the | +| dead zone ends, expedited grace periods go back to using workqueues, | +| as is required to avoid problems that would otherwise occur when a | +| user task received a POSIX signal while driving an expedited grace | +| period. | +| | +| And yes, this does mean that it is unhelpful to send POSIX signals to | +| random tasks between the time that the scheduler spawns its first | +| kthread and the time that RCU's kthreads have all been spawned. If | +| there ever turns out to be a good reason for sending POSIX signals | +| during that time, appropriate adjustments will be made. (If it turns | +| out that POSIX signals are sent during this time for no good reason, | +| other adjustments will be made, appropriate or otherwise.) | ++-----------------------------------------------------------------------+ + +I learned of these boot-time requirements as a result of a series of +system hangs. + +Interrupts and NMIs +~~~~~~~~~~~~~~~~~~~ + +The Linux kernel has interrupts, and RCU read-side critical sections are +legal within interrupt handlers and within interrupt-disabled regions of +code, as are invocations of call_rcu(). + +Some Linux-kernel architectures can enter an interrupt handler from +non-idle process context, and then just never leave it, instead +stealthily transitioning back to process context. This trick is +sometimes used to invoke system calls from inside the kernel. These +“half-interrupts” mean that RCU has to be very careful about how it +counts interrupt nesting levels. I learned of this requirement the hard +way during a rewrite of RCU's dyntick-idle code. + +The Linux kernel has non-maskable interrupts (NMIs), and RCU read-side +critical sections are legal within NMI handlers. Thankfully, RCU +update-side primitives, including call_rcu(), are prohibited within +NMI handlers. + +The name notwithstanding, some Linux-kernel architectures can have +nested NMIs, which RCU must handle correctly. Andy Lutomirski `surprised +me <https://lore.kernel.org/r/CALCETrXLq1y7e_dKFPgou-FKHB6Pu-r8+t-6Ds+8=va7anBWDA@mail.gmail.com>`__ +with this requirement; he also kindly surprised me with `an +algorithm <https://lore.kernel.org/r/CALCETrXSY9JpW3uE6H8WYk81sg56qasA2aqmjMPsq5dOtzso=g@mail.gmail.com>`__ +that meets this requirement. + +Furthermore, NMI handlers can be interrupted by what appear to RCU to be +normal interrupts. One way that this can happen is for code that +directly invokes ct_irq_enter() and ct_irq_exit() to be called +from an NMI handler. This astonishing fact of life prompted the current +code structure, which has ct_irq_enter() invoking +ct_nmi_enter() and ct_irq_exit() invoking ct_nmi_exit(). +And yes, I also learned of this requirement the hard way. + +Loadable Modules +~~~~~~~~~~~~~~~~ + +The Linux kernel has loadable modules, and these modules can also be +unloaded. After a given module has been unloaded, any attempt to call +one of its functions results in a segmentation fault. The module-unload +functions must therefore cancel any delayed calls to loadable-module +functions, for example, any outstanding mod_timer() must be dealt +with via timer_shutdown_sync() or similar. + +Unfortunately, there is no way to cancel an RCU callback; once you +invoke call_rcu(), the callback function is eventually going to be +invoked, unless the system goes down first. Because it is normally +considered socially irresponsible to crash the system in response to a +module unload request, we need some other way to deal with in-flight RCU +callbacks. + +RCU therefore provides rcu_barrier(), which waits until all +in-flight RCU callbacks have been invoked. If a module uses +call_rcu(), its exit function should therefore prevent any future +invocation of call_rcu(), then invoke rcu_barrier(). In theory, +the underlying module-unload code could invoke rcu_barrier() +unconditionally, but in practice this would incur unacceptable +latencies. + +Nikita Danilov noted this requirement for an analogous +filesystem-unmount situation, and Dipankar Sarma incorporated +rcu_barrier() into RCU. The need for rcu_barrier() for module +unloading became apparent later. + +.. important:: + + The rcu_barrier() function is not, repeat, + *not*, obligated to wait for a grace period. It is instead only required + to wait for RCU callbacks that have already been posted. Therefore, if + there are no RCU callbacks posted anywhere in the system, + rcu_barrier() is within its rights to return immediately. Even if + there are callbacks posted, rcu_barrier() does not necessarily need + to wait for a grace period. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Wait a minute! Each RCU callbacks must wait for a grace period to | +| complete, and rcu_barrier() must wait for each pre-existing | +| callback to be invoked. Doesn't rcu_barrier() therefore need to | +| wait for a full grace period if there is even one callback posted | +| anywhere in the system? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Absolutely not!!! | +| Yes, each RCU callbacks must wait for a grace period to complete, but | +| it might well be partly (or even completely) finished waiting by the | +| time rcu_barrier() is invoked. In that case, rcu_barrier() | +| need only wait for the remaining portion of the grace period to | +| elapse. So even if there are quite a few callbacks posted, | +| rcu_barrier() might well return quite quickly. | +| | +| So if you need to wait for a grace period as well as for all | +| pre-existing callbacks, you will need to invoke both | +| synchronize_rcu() and rcu_barrier(). If latency is a concern, | +| you can always use workqueues to invoke them concurrently. | ++-----------------------------------------------------------------------+ + +Hotplug CPU +~~~~~~~~~~~ + +The Linux kernel supports CPU hotplug, which means that CPUs can come +and go. It is of course illegal to use any RCU API member from an +offline CPU, with the exception of `SRCU <Sleepable RCU_>`__ read-side +critical sections. This requirement was present from day one in +DYNIX/ptx, but on the other hand, the Linux kernel's CPU-hotplug +implementation is “interesting.” + +The Linux-kernel CPU-hotplug implementation has notifiers that are used +to allow the various kernel subsystems (including RCU) to respond +appropriately to a given CPU-hotplug operation. Most RCU operations may +be invoked from CPU-hotplug notifiers, including even synchronous +grace-period operations such as (synchronize_rcu() and +synchronize_rcu_expedited()). However, these synchronous operations +do block and therefore cannot be invoked from notifiers that execute via +stop_machine(), specifically those between the ``CPUHP_AP_OFFLINE`` +and ``CPUHP_AP_ONLINE`` states. + +In addition, all-callback-wait operations such as rcu_barrier() may +not be invoked from any CPU-hotplug notifier. This restriction is due +to the fact that there are phases of CPU-hotplug operations where the +outgoing CPU's callbacks will not be invoked until after the CPU-hotplug +operation ends, which could also result in deadlock. Furthermore, +rcu_barrier() blocks CPU-hotplug operations during its execution, +which results in another type of deadlock when invoked from a CPU-hotplug +notifier. + +Finally, RCU must avoid deadlocks due to interaction between hotplug, +timers and grace period processing. It does so by maintaining its own set +of books that duplicate the centrally maintained ``cpu_online_mask``, +and also by reporting quiescent states explicitly when a CPU goes +offline. This explicit reporting of quiescent states avoids any need +for the force-quiescent-state loop (FQS) to report quiescent states for +offline CPUs. However, as a debugging measure, the FQS loop does splat +if offline CPUs block an RCU grace period for too long. + +An offline CPU's quiescent state will be reported either: + +1. As the CPU goes offline using RCU's hotplug notifier (rcu_report_dead()). +2. When grace period initialization (rcu_gp_init()) detects a + race either with CPU offlining or with a task unblocking on a leaf + ``rcu_node`` structure whose CPUs are all offline. + +The CPU-online path (rcu_cpu_starting()) should never need to report +a quiescent state for an offline CPU. However, as a debugging measure, +it does emit a warning if a quiescent state was not already reported +for that CPU. + +During the checking/modification of RCU's hotplug bookkeeping, the +corresponding CPU's leaf node lock is held. This avoids race conditions +between RCU's hotplug notifier hooks, the grace period initialization +code, and the FQS loop, all of which refer to or modify this bookkeeping. + +Scheduler and RCU +~~~~~~~~~~~~~~~~~ + +RCU makes use of kthreads, and it is necessary to avoid excessive CPU-time +accumulation by these kthreads. This requirement was no surprise, but +RCU's violation of it when running context-switch-heavy workloads when +built with ``CONFIG_NO_HZ_FULL=y`` `did come as a surprise +[PDF] <http://www.rdrop.com/users/paulmck/scalability/paper/BareMetal.2015.01.15b.pdf>`__. +RCU has made good progress towards meeting this requirement, even for +context-switch-heavy ``CONFIG_NO_HZ_FULL=y`` workloads, but there is +room for further improvement. + +There is no longer any prohibition against holding any of +scheduler's runqueue or priority-inheritance spinlocks across an +rcu_read_unlock(), even if interrupts and preemption were enabled +somewhere within the corresponding RCU read-side critical section. +Therefore, it is now perfectly legal to execute rcu_read_lock() +with preemption enabled, acquire one of the scheduler locks, and hold +that lock across the matching rcu_read_unlock(). + +Similarly, the RCU flavor consolidation has removed the need for negative +nesting. The fact that interrupt-disabled regions of code act as RCU +read-side critical sections implicitly avoids earlier issues that used +to result in destructive recursion via interrupt handler's use of RCU. + +Tracing and RCU +~~~~~~~~~~~~~~~ + +It is possible to use tracing on RCU code, but tracing itself uses RCU. +For this reason, rcu_dereference_raw_check() is provided for use +by tracing, which avoids the destructive recursion that could otherwise +ensue. This API is also used by virtualization in some architectures, +where RCU readers execute in environments in which tracing cannot be +used. The tracing folks both located the requirement and provided the +needed fix, so this surprise requirement was relatively painless. + +Accesses to User Memory and RCU +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The kernel needs to access user-space memory, for example, to access data +referenced by system-call parameters. The get_user() macro does this job. + +However, user-space memory might well be paged out, which means that +get_user() might well page-fault and thus block while waiting for the +resulting I/O to complete. It would be a very bad thing for the compiler to +reorder a get_user() invocation into an RCU read-side critical section. + +For example, suppose that the source code looked like this: + + :: + + 1 rcu_read_lock(); + 2 p = rcu_dereference(gp); + 3 v = p->value; + 4 rcu_read_unlock(); + 5 get_user(user_v, user_p); + 6 do_something_with(v, user_v); + +The compiler must not be permitted to transform this source code into +the following: + + :: + + 1 rcu_read_lock(); + 2 p = rcu_dereference(gp); + 3 get_user(user_v, user_p); // BUG: POSSIBLE PAGE FAULT!!! + 4 v = p->value; + 5 rcu_read_unlock(); + 6 do_something_with(v, user_v); + +If the compiler did make this transformation in a ``CONFIG_PREEMPTION=n`` kernel +build, and if get_user() did page fault, the result would be a quiescent +state in the middle of an RCU read-side critical section. This misplaced +quiescent state could result in line 4 being a use-after-free access, +which could be bad for your kernel's actuarial statistics. Similar examples +can be constructed with the call to get_user() preceding the +rcu_read_lock(). + +Unfortunately, get_user() doesn't have any particular ordering properties, +and in some architectures the underlying ``asm`` isn't even marked +``volatile``. And even if it was marked ``volatile``, the above access to +``p->value`` is not volatile, so the compiler would not have any reason to keep +those two accesses in order. + +Therefore, the Linux-kernel definitions of rcu_read_lock() and +rcu_read_unlock() must act as compiler barriers, at least for outermost +instances of rcu_read_lock() and rcu_read_unlock() within a nested set +of RCU read-side critical sections. + +Energy Efficiency +~~~~~~~~~~~~~~~~~ + +Interrupting idle CPUs is considered socially unacceptable, especially +by people with battery-powered embedded systems. RCU therefore conserves +energy by detecting which CPUs are idle, including tracking CPUs that +have been interrupted from idle. This is a large part of the +energy-efficiency requirement, so I learned of this via an irate phone +call. + +Because RCU avoids interrupting idle CPUs, it is illegal to execute an +RCU read-side critical section on an idle CPU. (Kernels built with +``CONFIG_PROVE_RCU=y`` will splat if you try it.) + +It is similarly socially unacceptable to interrupt an ``nohz_full`` CPU +running in userspace. RCU must therefore track ``nohz_full`` userspace +execution. RCU must therefore be able to sample state at two points in +time, and be able to determine whether or not some other CPU spent any +time idle and/or executing in userspace. + +These energy-efficiency requirements have proven quite difficult to +understand and to meet, for example, there have been more than five +clean-sheet rewrites of RCU's energy-efficiency code, the last of which +was finally able to demonstrate `real energy savings running on real +hardware +[PDF] <http://www.rdrop.com/users/paulmck/realtime/paper/AMPenergy.2013.04.19a.pdf>`__. +As noted earlier, I learned of many of these requirements via angry +phone calls: Flaming me on the Linux-kernel mailing list was apparently +not sufficient to fully vent their ire at RCU's energy-efficiency bugs! + +Scheduling-Clock Interrupts and RCU +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The kernel transitions between in-kernel non-idle execution, userspace +execution, and the idle loop. Depending on kernel configuration, RCU +handles these states differently: + ++-----------------+------------------+------------------+-----------------+ +| ``HZ`` Kconfig | In-Kernel | Usermode | Idle | ++=================+==================+==================+=================+ +| ``HZ_PERIODIC`` | Can rely on | Can rely on | Can rely on | +| | scheduling-clock | scheduling-clock | RCU's | +| | interrupt. | interrupt and | dyntick-idle | +| | | its detection | detection. | +| | | of interrupt | | +| | | from usermode. | | ++-----------------+------------------+------------------+-----------------+ +| ``NO_HZ_IDLE`` | Can rely on | Can rely on | Can rely on | +| | scheduling-clock | scheduling-clock | RCU's | +| | interrupt. | interrupt and | dyntick-idle | +| | | its detection | detection. | +| | | of interrupt | | +| | | from usermode. | | ++-----------------+------------------+------------------+-----------------+ +| ``NO_HZ_FULL`` | Can only | Can rely on | Can rely on | +| | sometimes rely | RCU's | RCU's | +| | on | dyntick-idle | dyntick-idle | +| | scheduling-clock | detection. | detection. | +| | interrupt. In | | | +| | other cases, it | | | +| | is necessary to | | | +| | bound kernel | | | +| | execution times | | | +| | and/or use | | | +| | IPIs. | | | ++-----------------+------------------+------------------+-----------------+ + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| Why can't ``NO_HZ_FULL`` in-kernel execution rely on the | +| scheduling-clock interrupt, just like ``HZ_PERIODIC`` and | +| ``NO_HZ_IDLE`` do? | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| Because, as a performance optimization, ``NO_HZ_FULL`` does not | +| necessarily re-enable the scheduling-clock interrupt on entry to each | +| and every system call. | ++-----------------------------------------------------------------------+ + +However, RCU must be reliably informed as to whether any given CPU is +currently in the idle loop, and, for ``NO_HZ_FULL``, also whether that +CPU is executing in usermode, as discussed +`earlier <Energy Efficiency_>`__. It also requires that the +scheduling-clock interrupt be enabled when RCU needs it to be: + +#. If a CPU is either idle or executing in usermode, and RCU believes it + is non-idle, the scheduling-clock tick had better be running. + Otherwise, you will get RCU CPU stall warnings. Or at best, very long + (11-second) grace periods, with a pointless IPI waking the CPU from + time to time. +#. If a CPU is in a portion of the kernel that executes RCU read-side + critical sections, and RCU believes this CPU to be idle, you will get + random memory corruption. **DON'T DO THIS!!!** + This is one reason to test with lockdep, which will complain about + this sort of thing. +#. If a CPU is in a portion of the kernel that is absolutely positively + no-joking guaranteed to never execute any RCU read-side critical + sections, and RCU believes this CPU to be idle, no problem. This + sort of thing is used by some architectures for light-weight + exception handlers, which can then avoid the overhead of + ct_irq_enter() and ct_irq_exit() at exception entry and + exit, respectively. Some go further and avoid the entireties of + irq_enter() and irq_exit(). + Just make very sure you are running some of your tests with + ``CONFIG_PROVE_RCU=y``, just in case one of your code paths was in + fact joking about not doing RCU read-side critical sections. +#. If a CPU is executing in the kernel with the scheduling-clock + interrupt disabled and RCU believes this CPU to be non-idle, and if + the CPU goes idle (from an RCU perspective) every few jiffies, no + problem. It is usually OK for there to be the occasional gap between + idle periods of up to a second or so. + If the gap grows too long, you get RCU CPU stall warnings. +#. If a CPU is either idle or executing in usermode, and RCU believes it + to be idle, of course no problem. +#. If a CPU is executing in the kernel, the kernel code path is passing + through quiescent states at a reasonable frequency (preferably about + once per few jiffies, but the occasional excursion to a second or so + is usually OK) and the scheduling-clock interrupt is enabled, of + course no problem. + If the gap between a successive pair of quiescent states grows too + long, you get RCU CPU stall warnings. + ++-----------------------------------------------------------------------+ +| **Quick Quiz**: | ++-----------------------------------------------------------------------+ +| But what if my driver has a hardware interrupt handler that can run | +| for many seconds? I cannot invoke schedule() from an hardware | +| interrupt handler, after all! | ++-----------------------------------------------------------------------+ +| **Answer**: | ++-----------------------------------------------------------------------+ +| One approach is to do ``ct_irq_exit();ct_irq_enter();`` every so | +| often. But given that long-running interrupt handlers can cause other | +| problems, not least for response time, shouldn't you work to keep | +| your interrupt handler's runtime within reasonable bounds? | ++-----------------------------------------------------------------------+ + +But as long as RCU is properly informed of kernel state transitions +between in-kernel execution, usermode execution, and idle, and as long +as the scheduling-clock interrupt is enabled when RCU needs it to be, +you can rest assured that the bugs you encounter will be in some other +part of RCU or some other part of the kernel! + +Memory Efficiency +~~~~~~~~~~~~~~~~~ + +Although small-memory non-realtime systems can simply use Tiny RCU, code +size is only one aspect of memory efficiency. Another aspect is the size +of the ``rcu_head`` structure used by call_rcu() and +kfree_rcu(). Although this structure contains nothing more than a +pair of pointers, it does appear in many RCU-protected data structures, +including some that are size critical. The ``page`` structure is a case +in point, as evidenced by the many occurrences of the ``union`` keyword +within that structure. + +This need for memory efficiency is one reason that RCU uses hand-crafted +singly linked lists to track the ``rcu_head`` structures that are +waiting for a grace period to elapse. It is also the reason why +``rcu_head`` structures do not contain debug information, such as fields +tracking the file and line of the call_rcu() or kfree_rcu() that +posted them. Although this information might appear in debug-only kernel +builds at some point, in the meantime, the ``->func`` field will often +provide the needed debug information. + +However, in some cases, the need for memory efficiency leads to even +more extreme measures. Returning to the ``page`` structure, the +``rcu_head`` field shares storage with a great many other structures +that are used at various points in the corresponding page's lifetime. In +order to correctly resolve certain `race +conditions <https://lore.kernel.org/r/1439976106-137226-1-git-send-email-kirill.shutemov@linux.intel.com>`__, +the Linux kernel's memory-management subsystem needs a particular bit to +remain zero during all phases of grace-period processing, and that bit +happens to map to the bottom bit of the ``rcu_head`` structure's +``->next`` field. RCU makes this guarantee as long as call_rcu() is +used to post the callback, as opposed to kfree_rcu() or some future +“lazy” variant of call_rcu() that might one day be created for +energy-efficiency purposes. + +That said, there are limits. RCU requires that the ``rcu_head`` +structure be aligned to a two-byte boundary, and passing a misaligned +``rcu_head`` structure to one of the call_rcu() family of functions +will result in a splat. It is therefore necessary to exercise caution +when packing structures containing fields of type ``rcu_head``. Why not +a four-byte or even eight-byte alignment requirement? Because the m68k +architecture provides only two-byte alignment, and thus acts as +alignment's least common denominator. + +The reason for reserving the bottom bit of pointers to ``rcu_head`` +structures is to leave the door open to “lazy” callbacks whose +invocations can safely be deferred. Deferring invocation could +potentially have energy-efficiency benefits, but only if the rate of +non-lazy callbacks decreases significantly for some important workload. +In the meantime, reserving the bottom bit keeps this option open in case +it one day becomes useful. + +Performance, Scalability, Response Time, and Reliability +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Expanding on the `earlier +discussion <Performance and Scalability_>`__, RCU is used heavily by +hot code paths in performance-critical portions of the Linux kernel's +networking, security, virtualization, and scheduling code paths. RCU +must therefore use efficient implementations, especially in its +read-side primitives. To that end, it would be good if preemptible RCU's +implementation of rcu_read_lock() could be inlined, however, doing +this requires resolving ``#include`` issues with the ``task_struct`` +structure. + +The Linux kernel supports hardware configurations with up to 4096 CPUs, +which means that RCU must be extremely scalable. Algorithms that involve +frequent acquisitions of global locks or frequent atomic operations on +global variables simply cannot be tolerated within the RCU +implementation. RCU therefore makes heavy use of a combining tree based +on the ``rcu_node`` structure. RCU is required to tolerate all CPUs +continuously invoking any combination of RCU's runtime primitives with +minimal per-operation overhead. In fact, in many cases, increasing load +must *decrease* the per-operation overhead, witness the batching +optimizations for synchronize_rcu(), call_rcu(), +synchronize_rcu_expedited(), and rcu_barrier(). As a general +rule, RCU must cheerfully accept whatever the rest of the Linux kernel +decides to throw at it. + +The Linux kernel is used for real-time workloads, especially in +conjunction with the `-rt +patchset <https://wiki.linuxfoundation.org/realtime/>`__. The +real-time-latency response requirements are such that the traditional +approach of disabling preemption across RCU read-side critical sections +is inappropriate. Kernels built with ``CONFIG_PREEMPTION=y`` therefore use +an RCU implementation that allows RCU read-side critical sections to be +preempted. This requirement made its presence known after users made it +clear that an earlier `real-time +patch <https://lwn.net/Articles/107930/>`__ did not meet their needs, in +conjunction with some `RCU +issues <https://lore.kernel.org/r/20050318002026.GA2693@us.ibm.com>`__ +encountered by a very early version of the -rt patchset. + +In addition, RCU must make do with a sub-100-microsecond real-time +latency budget. In fact, on smaller systems with the -rt patchset, the +Linux kernel provides sub-20-microsecond real-time latencies for the +whole kernel, including RCU. RCU's scalability and latency must +therefore be sufficient for these sorts of configurations. To my +surprise, the sub-100-microsecond real-time latency budget `applies to +even the largest systems +[PDF] <http://www.rdrop.com/users/paulmck/realtime/paper/bigrt.2013.01.31a.LCA.pdf>`__, +up to and including systems with 4096 CPUs. This real-time requirement +motivated the grace-period kthread, which also simplified handling of a +number of race conditions. + +RCU must avoid degrading real-time response for CPU-bound threads, +whether executing in usermode (which is one use case for +``CONFIG_NO_HZ_FULL=y``) or in the kernel. That said, CPU-bound loops in +the kernel must execute cond_resched() at least once per few tens of +milliseconds in order to avoid receiving an IPI from RCU. + +Finally, RCU's status as a synchronization primitive means that any RCU +failure can result in arbitrary memory corruption that can be extremely +difficult to debug. This means that RCU must be extremely reliable, +which in practice also means that RCU must have an aggressive +stress-test suite. This stress-test suite is called ``rcutorture``. + +Although the need for ``rcutorture`` was no surprise, the current +immense popularity of the Linux kernel is posing interesting—and perhaps +unprecedented—validation challenges. To see this, keep in mind that +there are well over one billion instances of the Linux kernel running +today, given Android smartphones, Linux-powered televisions, and +servers. This number can be expected to increase sharply with the advent +of the celebrated Internet of Things. + +Suppose that RCU contains a race condition that manifests on average +once per million years of runtime. This bug will be occurring about +three times per *day* across the installed base. RCU could simply hide +behind hardware error rates, given that no one should really expect +their smartphone to last for a million years. However, anyone taking too +much comfort from this thought should consider the fact that in most +jurisdictions, a successful multi-year test of a given mechanism, which +might include a Linux kernel, suffices for a number of types of +safety-critical certifications. In fact, rumor has it that the Linux +kernel is already being used in production for safety-critical +applications. I don't know about you, but I would feel quite bad if a +bug in RCU killed someone. Which might explain my recent focus on +validation and verification. + +Other RCU Flavors +----------------- + +One of the more surprising things about RCU is that there are now no +fewer than five *flavors*, or API families. In addition, the primary +flavor that has been the sole focus up to this point has two different +implementations, non-preemptible and preemptible. The other four flavors +are listed below, with requirements for each described in a separate +section. + +#. `Bottom-Half Flavor (Historical)`_ +#. `Sched Flavor (Historical)`_ +#. `Sleepable RCU`_ +#. `Tasks RCU`_ + +Bottom-Half Flavor (Historical) +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The RCU-bh flavor of RCU has since been expressed in terms of the other +RCU flavors as part of a consolidation of the three flavors into a +single flavor. The read-side API remains, and continues to disable +softirq and to be accounted for by lockdep. Much of the material in this +section is therefore strictly historical in nature. + +The softirq-disable (AKA “bottom-half”, hence the “_bh” abbreviations) +flavor of RCU, or *RCU-bh*, was developed by Dipankar Sarma to provide a +flavor of RCU that could withstand the network-based denial-of-service +attacks researched by Robert Olsson. These attacks placed so much +networking load on the system that some of the CPUs never exited softirq +execution, which in turn prevented those CPUs from ever executing a +context switch, which, in the RCU implementation of that time, prevented +grace periods from ever ending. The result was an out-of-memory +condition and a system hang. + +The solution was the creation of RCU-bh, which does +local_bh_disable() across its read-side critical sections, and which +uses the transition from one type of softirq processing to another as a +quiescent state in addition to context switch, idle, user mode, and +offline. This means that RCU-bh grace periods can complete even when +some of the CPUs execute in softirq indefinitely, thus allowing +algorithms based on RCU-bh to withstand network-based denial-of-service +attacks. + +Because rcu_read_lock_bh() and rcu_read_unlock_bh() disable and +re-enable softirq handlers, any attempt to start a softirq handlers +during the RCU-bh read-side critical section will be deferred. In this +case, rcu_read_unlock_bh() will invoke softirq processing, which can +take considerable time. One can of course argue that this softirq +overhead should be associated with the code following the RCU-bh +read-side critical section rather than rcu_read_unlock_bh(), but the +fact is that most profiling tools cannot be expected to make this sort +of fine distinction. For example, suppose that a three-millisecond-long +RCU-bh read-side critical section executes during a time of heavy +networking load. There will very likely be an attempt to invoke at least +one softirq handler during that three milliseconds, but any such +invocation will be delayed until the time of the +rcu_read_unlock_bh(). This can of course make it appear at first +glance as if rcu_read_unlock_bh() was executing very slowly. + +The `RCU-bh +API <https://lwn.net/Articles/609973/#RCU%20Per-Flavor%20API%20Table>`__ +includes rcu_read_lock_bh(), rcu_read_unlock_bh(), rcu_dereference_bh(), +rcu_dereference_bh_check(), and rcu_read_lock_bh_held(). However, the +old RCU-bh update-side APIs are now gone, replaced by synchronize_rcu(), +synchronize_rcu_expedited(), call_rcu(), and rcu_barrier(). In addition, +anything that disables bottom halves also marks an RCU-bh read-side +critical section, including local_bh_disable() and local_bh_enable(), +local_irq_save() and local_irq_restore(), and so on. + +Sched Flavor (Historical) +~~~~~~~~~~~~~~~~~~~~~~~~~ + +The RCU-sched flavor of RCU has since been expressed in terms of the +other RCU flavors as part of a consolidation of the three flavors into a +single flavor. The read-side API remains, and continues to disable +preemption and to be accounted for by lockdep. Much of the material in +this section is therefore strictly historical in nature. + +Before preemptible RCU, waiting for an RCU grace period had the side +effect of also waiting for all pre-existing interrupt and NMI handlers. +However, there are legitimate preemptible-RCU implementations that do +not have this property, given that any point in the code outside of an +RCU read-side critical section can be a quiescent state. Therefore, +*RCU-sched* was created, which follows “classic” RCU in that an +RCU-sched grace period waits for pre-existing interrupt and NMI +handlers. In kernels built with ``CONFIG_PREEMPTION=n``, the RCU and +RCU-sched APIs have identical implementations, while kernels built with +``CONFIG_PREEMPTION=y`` provide a separate implementation for each. + +Note well that in ``CONFIG_PREEMPTION=y`` kernels, +rcu_read_lock_sched() and rcu_read_unlock_sched() disable and +re-enable preemption, respectively. This means that if there was a +preemption attempt during the RCU-sched read-side critical section, +rcu_read_unlock_sched() will enter the scheduler, with all the +latency and overhead entailed. Just as with rcu_read_unlock_bh(), +this can make it look as if rcu_read_unlock_sched() was executing +very slowly. However, the highest-priority task won't be preempted, so +that task will enjoy low-overhead rcu_read_unlock_sched() +invocations. + +The `RCU-sched +API <https://lwn.net/Articles/609973/#RCU%20Per-Flavor%20API%20Table>`__ +includes rcu_read_lock_sched(), rcu_read_unlock_sched(), +rcu_read_lock_sched_notrace(), rcu_read_unlock_sched_notrace(), +rcu_dereference_sched(), rcu_dereference_sched_check(), and +rcu_read_lock_sched_held(). However, the old RCU-sched update-side APIs +are now gone, replaced by synchronize_rcu(), synchronize_rcu_expedited(), +call_rcu(), and rcu_barrier(). In addition, anything that disables +preemption also marks an RCU-sched read-side critical section, +including preempt_disable() and preempt_enable(), local_irq_save() +and local_irq_restore(), and so on. + +Sleepable RCU +~~~~~~~~~~~~~ + +For well over a decade, someone saying “I need to block within an RCU +read-side critical section” was a reliable indication that this someone +did not understand RCU. After all, if you are always blocking in an RCU +read-side critical section, you can probably afford to use a +higher-overhead synchronization mechanism. However, that changed with +the advent of the Linux kernel's notifiers, whose RCU read-side critical +sections almost never sleep, but sometimes need to. This resulted in the +introduction of `sleepable RCU <https://lwn.net/Articles/202847/>`__, or +*SRCU*. + +SRCU allows different domains to be defined, with each such domain +defined by an instance of an ``srcu_struct`` structure. A pointer to +this structure must be passed in to each SRCU function, for example, +``synchronize_srcu(&ss)``, where ``ss`` is the ``srcu_struct`` +structure. The key benefit of these domains is that a slow SRCU reader +in one domain does not delay an SRCU grace period in some other domain. +That said, one consequence of these domains is that read-side code must +pass a “cookie” from srcu_read_lock() to srcu_read_unlock(), for +example, as follows: + + :: + + 1 int idx; + 2 + 3 idx = srcu_read_lock(&ss); + 4 do_something(); + 5 srcu_read_unlock(&ss, idx); + +As noted above, it is legal to block within SRCU read-side critical +sections, however, with great power comes great responsibility. If you +block forever in one of a given domain's SRCU read-side critical +sections, then that domain's grace periods will also be blocked forever. +Of course, one good way to block forever is to deadlock, which can +happen if any operation in a given domain's SRCU read-side critical +section can wait, either directly or indirectly, for that domain's grace +period to elapse. For example, this results in a self-deadlock: + + :: + + 1 int idx; + 2 + 3 idx = srcu_read_lock(&ss); + 4 do_something(); + 5 synchronize_srcu(&ss); + 6 srcu_read_unlock(&ss, idx); + +However, if line 5 acquired a mutex that was held across a +synchronize_srcu() for domain ``ss``, deadlock would still be +possible. Furthermore, if line 5 acquired a mutex that was held across a +synchronize_srcu() for some other domain ``ss1``, and if an +``ss1``-domain SRCU read-side critical section acquired another mutex +that was held across as ``ss``-domain synchronize_srcu(), deadlock +would again be possible. Such a deadlock cycle could extend across an +arbitrarily large number of different SRCU domains. Again, with great +power comes great responsibility. + +Unlike the other RCU flavors, SRCU read-side critical sections can run +on idle and even offline CPUs. This ability requires that +srcu_read_lock() and srcu_read_unlock() contain memory barriers, +which means that SRCU readers will run a bit slower than would RCU +readers. It also motivates the smp_mb__after_srcu_read_unlock() API, +which, in combination with srcu_read_unlock(), guarantees a full +memory barrier. + +Also unlike other RCU flavors, synchronize_srcu() may **not** be +invoked from CPU-hotplug notifiers, due to the fact that SRCU grace +periods make use of timers and the possibility of timers being +temporarily “stranded” on the outgoing CPU. This stranding of timers +means that timers posted to the outgoing CPU will not fire until late in +the CPU-hotplug process. The problem is that if a notifier is waiting on +an SRCU grace period, that grace period is waiting on a timer, and that +timer is stranded on the outgoing CPU, then the notifier will never be +awakened, in other words, deadlock has occurred. This same situation of +course also prohibits srcu_barrier() from being invoked from +CPU-hotplug notifiers. + +SRCU also differs from other RCU flavors in that SRCU's expedited and +non-expedited grace periods are implemented by the same mechanism. This +means that in the current SRCU implementation, expediting a future grace +period has the side effect of expediting all prior grace periods that +have not yet completed. (But please note that this is a property of the +current implementation, not necessarily of future implementations.) In +addition, if SRCU has been idle for longer than the interval specified +by the ``srcutree.exp_holdoff`` kernel boot parameter (25 microseconds +by default), and if a synchronize_srcu() invocation ends this idle +period, that invocation will be automatically expedited. + +As of v4.12, SRCU's callbacks are maintained per-CPU, eliminating a +locking bottleneck present in prior kernel versions. Although this will +allow users to put much heavier stress on call_srcu(), it is +important to note that SRCU does not yet take any special steps to deal +with callback flooding. So if you are posting (say) 10,000 SRCU +callbacks per second per CPU, you are probably totally OK, but if you +intend to post (say) 1,000,000 SRCU callbacks per second per CPU, please +run some tests first. SRCU just might need a few adjustment to deal with +that sort of load. Of course, your mileage may vary based on the speed +of your CPUs and the size of your memory. + +The `SRCU +API <https://lwn.net/Articles/609973/#RCU%20Per-Flavor%20API%20Table>`__ +includes srcu_read_lock(), srcu_read_unlock(), +srcu_dereference(), srcu_dereference_check(), +synchronize_srcu(), synchronize_srcu_expedited(), +call_srcu(), srcu_barrier(), and srcu_read_lock_held(). It +also includes DEFINE_SRCU(), DEFINE_STATIC_SRCU(), and +init_srcu_struct() APIs for defining and initializing +``srcu_struct`` structures. + +More recently, the SRCU API has added polling interfaces: + +#. start_poll_synchronize_srcu() returns a cookie identifying + the completion of a future SRCU grace period and ensures + that this grace period will be started. +#. poll_state_synchronize_srcu() returns ``true`` iff the + specified cookie corresponds to an already-completed + SRCU grace period. +#. get_state_synchronize_srcu() returns a cookie just like + start_poll_synchronize_srcu() does, but differs in that + it does nothing to ensure that any future SRCU grace period + will be started. + +These functions are used to avoid unnecessary SRCU grace periods in +certain types of buffer-cache algorithms having multi-stage age-out +mechanisms. The idea is that by the time the block has aged completely +from the cache, an SRCU grace period will be very likely to have elapsed. + +Tasks RCU +~~~~~~~~~ + +Some forms of tracing use “trampolines” to handle the binary rewriting +required to install different types of probes. It would be good to be +able to free old trampolines, which sounds like a job for some form of +RCU. However, because it is necessary to be able to install a trace +anywhere in the code, it is not possible to use read-side markers such +as rcu_read_lock() and rcu_read_unlock(). In addition, it does +not work to have these markers in the trampoline itself, because there +would need to be instructions following rcu_read_unlock(). Although +synchronize_rcu() would guarantee that execution reached the +rcu_read_unlock(), it would not be able to guarantee that execution +had completely left the trampoline. Worse yet, in some situations +the trampoline's protection must extend a few instructions *prior* to +execution reaching the trampoline. For example, these few instructions +might calculate the address of the trampoline, so that entering the +trampoline would be pre-ordained a surprisingly long time before execution +actually reached the trampoline itself. + +The solution, in the form of `Tasks +RCU <https://lwn.net/Articles/607117/>`__, is to have implicit read-side +critical sections that are delimited by voluntary context switches, that +is, calls to schedule(), cond_resched(), and +synchronize_rcu_tasks(). In addition, transitions to and from +userspace execution also delimit tasks-RCU read-side critical sections. + +The tasks-RCU API is quite compact, consisting only of +call_rcu_tasks(), synchronize_rcu_tasks(), and +rcu_barrier_tasks(). In ``CONFIG_PREEMPTION=n`` kernels, trampolines +cannot be preempted, so these APIs map to call_rcu(), +synchronize_rcu(), and rcu_barrier(), respectively. In +``CONFIG_PREEMPTION=y`` kernels, trampolines can be preempted, and these +three APIs are therefore implemented by separate functions that check +for voluntary context switches. + +Tasks Rude RCU +~~~~~~~~~~~~~~ + +Some forms of tracing need to wait for all preemption-disabled regions +of code running on any online CPU, including those executed when RCU is +not watching. This means that synchronize_rcu() is insufficient, and +Tasks Rude RCU must be used instead. This flavor of RCU does its work by +forcing a workqueue to be scheduled on each online CPU, hence the "Rude" +moniker. And this operation is considered to be quite rude by real-time +workloads that don't want their ``nohz_full`` CPUs receiving IPIs and +by battery-powered systems that don't want their idle CPUs to be awakened. + +The tasks-rude-RCU API is also reader-marking-free and thus quite compact, +consisting of call_rcu_tasks_rude(), synchronize_rcu_tasks_rude(), +and rcu_barrier_tasks_rude(). + +Tasks Trace RCU +~~~~~~~~~~~~~~~ + +Some forms of tracing need to sleep in readers, but cannot tolerate +SRCU's read-side overhead, which includes a full memory barrier in both +srcu_read_lock() and srcu_read_unlock(). This need is handled by a +Tasks Trace RCU that uses scheduler locking and IPIs to synchronize with +readers. Real-time systems that cannot tolerate IPIs may build their +kernels with ``CONFIG_TASKS_TRACE_RCU_READ_MB=y``, which avoids the IPIs at +the expense of adding full memory barriers to the read-side primitives. + +The tasks-trace-RCU API is also reasonably compact, +consisting of rcu_read_lock_trace(), rcu_read_unlock_trace(), +rcu_read_lock_trace_held(), call_rcu_tasks_trace(), +synchronize_rcu_tasks_trace(), and rcu_barrier_tasks_trace(). + +Possible Future Changes +----------------------- + +One of the tricks that RCU uses to attain update-side scalability is to +increase grace-period latency with increasing numbers of CPUs. If this +becomes a serious problem, it will be necessary to rework the +grace-period state machine so as to avoid the need for the additional +latency. + +RCU disables CPU hotplug in a few places, perhaps most notably in the +rcu_barrier() operations. If there is a strong reason to use +rcu_barrier() in CPU-hotplug notifiers, it will be necessary to +avoid disabling CPU hotplug. This would introduce some complexity, so +there had better be a *very* good reason. + +The tradeoff between grace-period latency on the one hand and +interruptions of other CPUs on the other hand may need to be +re-examined. The desire is of course for zero grace-period latency as +well as zero interprocessor interrupts undertaken during an expedited +grace period operation. While this ideal is unlikely to be achievable, +it is quite possible that further improvements can be made. + +The multiprocessor implementations of RCU use a combining tree that +groups CPUs so as to reduce lock contention and increase cache locality. +However, this combining tree does not spread its memory across NUMA +nodes nor does it align the CPU groups with hardware features such as +sockets or cores. Such spreading and alignment is currently believed to +be unnecessary because the hotpath read-side primitives do not access +the combining tree, nor does call_rcu() in the common case. If you +believe that your architecture needs such spreading and alignment, then +your architecture should also benefit from the +``rcutree.rcu_fanout_leaf`` boot parameter, which can be set to the +number of CPUs in a socket, NUMA node, or whatever. If the number of +CPUs is too large, use a fraction of the number of CPUs. If the number +of CPUs is a large prime number, well, that certainly is an +“interesting” architectural choice! More flexible arrangements might be +considered, but only if ``rcutree.rcu_fanout_leaf`` has proven +inadequate, and only if the inadequacy has been demonstrated by a +carefully run and realistic system-level workload. + +Please note that arrangements that require RCU to remap CPU numbers will +require extremely good demonstration of need and full exploration of +alternatives. + +RCU's various kthreads are reasonably recent additions. It is quite +likely that adjustments will be required to more gracefully handle +extreme loads. It might also be necessary to be able to relate CPU +utilization by RCU's kthreads and softirq handlers to the code that +instigated this CPU utilization. For example, RCU callback overhead +might be charged back to the originating call_rcu() instance, though +probably not in production kernels. + +Additional work may be required to provide reasonable forward-progress +guarantees under heavy load for grace periods and for callback +invocation. + +Summary +------- + +This document has presented more than two decade's worth of RCU +requirements. Given that the requirements keep changing, this will not +be the last word on this subject, but at least it serves to get an +important subset of the requirements set forth. + +Acknowledgments +--------------- + +I am grateful to Steven Rostedt, Lai Jiangshan, Ingo Molnar, Oleg +Nesterov, Borislav Petkov, Peter Zijlstra, Boqun Feng, and Andy +Lutomirski for their help in rendering this article human readable, and +to Michelle Rankin for her support of this effort. Other contributions +are acknowledged in the Linux kernel's git archive. |
