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| author | Namhyung Kim <namhyung@kernel.org> | 2023-09-06 20:49:02 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-09-12 23:32:00 +0300 |
| commit | 4fd06bd2dcc893d922985cc4e9082477f6d115e6 (patch) | |
| tree | a1c7f5dd5ee58f922d79be97748aee667f04ca7e /tools/perf/Documentation | |
| parent | 4d1792d0a2564caf1620a2cc9aa6f12284b3a56f (diff) | |
| download | linux-4fd06bd2dcc893d922985cc4e9082477f6d115e6.tar.xz | |
perf lock contention: Add -G/--cgroup-filter option
The -G/--cgroup-filter is to limit lock contention collection on the
tasks in the specific cgroups only.
$ sudo ./perf lock con -abt -G /user.slice/.../vte-spawn-52221fb8-b33f-4a52-b5c3-e35d1e6fc0e0.scope \
./perf bench sched messaging
# Running 'sched/messaging' benchmark:
# 20 sender and receiver processes per group
# 10 groups == 400 processes run
Total time: 0.174 [sec]
contended total wait max wait avg wait pid comm
4 114.45 us 60.06 us 28.61 us 214847 sched-messaging
2 111.40 us 60.84 us 55.70 us 214848 sched-messaging
2 106.09 us 59.42 us 53.04 us 214837 sched-messaging
1 81.70 us 81.70 us 81.70 us 214709 sched-messaging
68 78.44 us 6.83 us 1.15 us 214633 sched-messaging
69 73.71 us 2.69 us 1.07 us 214632 sched-messaging
4 72.62 us 60.83 us 18.15 us 214850 sched-messaging
2 71.75 us 67.60 us 35.88 us 214840 sched-messaging
2 69.29 us 67.53 us 34.65 us 214804 sched-messaging
2 69.00 us 68.23 us 34.50 us 214826 sched-messaging
...
Export cgroup__new() function as it's needed from outside.
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20230906174903.346486-5-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-lock.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt index 4b5cdf4b33c6..503abcba1438 100644 --- a/tools/perf/Documentation/perf-lock.txt +++ b/tools/perf/Documentation/perf-lock.txt @@ -211,6 +211,10 @@ CONTENTION OPTIONS --lock-cgroup:: Show lock contention stat by cgroup. Requires --use-bpf. +-G:: +--cgroup-filter=<value>:: + Show lock contention only in the given cgroups (comma separated list). + SEE ALSO -------- |