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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:22 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:22 +0000 |
| commit | b20732900e4636a467c0183a47f7396700f5f743 (patch) | |
| tree | 42f079ff82e701ebcb76829974b4caca3e5b6798 /Documentation/admin-guide/perf/hisi-pcie-pmu.rst | |
| parent | Adding upstream version 6.8.12. (diff) | |
| download | linux-b20732900e4636a467c0183a47f7396700f5f743.tar.xz linux-b20732900e4636a467c0183a47f7396700f5f743.zip | |
Adding upstream version 6.9.7.upstream/6.9.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/admin-guide/perf/hisi-pcie-pmu.rst')
| -rw-r--r-- | Documentation/admin-guide/perf/hisi-pcie-pmu.rst | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst index 7e863662e2..5541ff40e0 100644 --- a/Documentation/admin-guide/perf/hisi-pcie-pmu.rst +++ b/Documentation/admin-guide/perf/hisi-pcie-pmu.rst @@ -37,9 +37,21 @@ Example usage of perf:: hisi_pcie0_core0/rx_mwr_cnt/ [kernel PMU event] ------------------------------------------ - $# perf stat -e hisi_pcie0_core0/rx_mwr_latency/ - $# perf stat -e hisi_pcie0_core0/rx_mwr_cnt/ - $# perf stat -g -e hisi_pcie0_core0/rx_mwr_latency/ -e hisi_pcie0_core0/rx_mwr_cnt/ + $# perf stat -e hisi_pcie0_core0/rx_mwr_latency,port=0xffff/ + $# perf stat -e hisi_pcie0_core0/rx_mwr_cnt,port=0xffff/ + +The related events usually used to calculate the bandwidth, latency or others. +They need to start and end counting at the same time, therefore related events +are best used in the same event group to get the expected value. There are two +ways to know if they are related events: + +a) By event name, such as the latency events "xxx_latency, xxx_cnt" or + bandwidth events "xxx_flux, xxx_time". +b) By event type, such as "event=0xXXXX, event=0x1XXXX". + +Example usage of perf group:: + + $# perf stat -e "{hisi_pcie0_core0/rx_mwr_latency,port=0xffff/,hisi_pcie0_core0/rx_mwr_cnt,port=0xffff/}" The current driver does not support sampling. So "perf record" is unsupported. Also attach to a task is unsupported for PCIe PMU. @@ -51,8 +63,12 @@ Filter options PMU could only monitor the performance of traffic downstream target Root Ports or downstream target Endpoint. PCIe PMU driver support "port" and - "bdf" interfaces for users, and these two interfaces aren't supported at the - same time. + "bdf" interfaces for users. + Please notice that, one of these two interfaces must be set, and these two + interfaces aren't supported at the same time. If they are both set, only + "port" filter is valid. + If "port" filter not being set or is set explicitly to zero (default), the + "bdf" filter will be in effect, because "bdf=0" meaning 0000:000:00.0. - port @@ -95,7 +111,7 @@ Filter options Example usage of perf:: - $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,trig_len=0x4,trig_mode=1/ sleep 5 + $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,port=0xffff,trig_len=0x4,trig_mode=1/ sleep 5 3. Threshold filter @@ -109,7 +125,7 @@ Filter options Example usage of perf:: - $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,thr_len=0x4,thr_mode=1/ sleep 5 + $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,port=0xffff,thr_len=0x4,thr_mode=1/ sleep 5 4. TLP Length filter @@ -127,4 +143,4 @@ Filter options Example usage of perf:: - $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,len_mode=0x1/ sleep 5 + $# perf stat -e hisi_pcie0_core0/rx_mrd_flux,port=0xffff,len_mode=0x1/ sleep 5 |