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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/demo/sched/whoqueue.d | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/demo/sched/whoqueue.d | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/demo/sched/whoqueue.d b/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/demo/sched/whoqueue.d new file mode 100644 index 00000000..c2ab47a3 --- /dev/null +++ b/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/demo/sched/whoqueue.d @@ -0,0 +1,95 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* + * Copyright 2005 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma D option quiet +#pragma D option nspec=4 +#pragma D option specsize=100k + +int maxlen; +int spec[int]; + +sched:::enqueue +{ + this->len = ++qlen[this->cpu = args[2]->cpu_id]; + in[args[0]->pr_addr] = timestamp; +} + +sched:::enqueue +/this->len > maxlen && spec[this->cpu]/ +{ + /* + * There is already a speculation for this CPU. We just set a new + * record, so we'll discard the old one. + */ + discard(spec[this->cpu]); +} + +sched:::enqueue +/this->len > maxlen/ +{ + /* + * We have a winner. Set the new maximum length and set the timestamp + * of the longest length. + */ + maxlen = this->len; + longtime[this->cpu] = timestamp; + + /* + * Now start a new speculation, and speculatively trace the length. + */ + this->spec = spec[this->cpu] = speculation(); + speculate(this->spec); + printf("Run queue of length %d:\n", this->len); +} + +sched:::dequeue +/(this->in = in[args[0]->pr_addr]) && + this->in <= longtime[this->cpu = args[2]->cpu_id]/ +{ + speculate(spec[this->cpu]); + printf(" %d/%d (%s)\n", + args[1]->pr_pid, args[0]->pr_lwpid, + stringof(args[1]->pr_fname)); +} + +sched:::dequeue +/qlen[args[2]->cpu_id]/ +{ + in[args[0]->pr_addr] = 0; + this->len = --qlen[args[2]->cpu_id]; +} + +sched:::dequeue +/this->len == 0 && spec[this->cpu]/ +{ + /* + * We just processed the last thread that was enqueued at the time + * of longest length; commit the speculation, which by now contains + * each thread that was enqueued when the queue was longest. + */ + commit(spec[this->cpu]); + spec[this->cpu] = 0; +} |