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| author | Namhyung Kim <namhyung@kernel.org> | 2022-07-29 13:07:56 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-08-01 09:28:51 -0300 |
| commit | 6fda2405f414b24a6d4fc74f2b1ab24b7fe00d14 (patch) | |
| tree | 11506bea5fe13fbbcd2dac6f0a12b70d969a0a43 /tools/perf/Documentation | |
| parent | 407b36f69efbdccf341ccc5be6a366ec0795aa83 (diff) | |
| download | linux-6fda2405f414b24a6d4fc74f2b1ab24b7fe00d14.tar.gz linux-6fda2405f414b24a6d4fc74f2b1ab24b7fe00d14.tar.bz2 linux-6fda2405f414b24a6d4fc74f2b1ab24b7fe00d14.zip | |
perf lock: Implement cpu and task filters for BPF
Add -a/--all-cpus and -C/--cpu options for cpu filtering. Also -p/--pid
and --tid options are added for task filtering. The short -t option is
taken for --threads already. Tracking the command line workload is
possible as well.
$ sudo perf lock contention -a -b sleep 1
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Blake Jones <blakejones@google.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Waiman Long <longman@redhat.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220729200756.666106-4-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 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-lock.txt b/tools/perf/Documentation/perf-lock.txt index b88bb72c77d4..7949d2e6891b 100644 --- a/tools/perf/Documentation/perf-lock.txt +++ b/tools/perf/Documentation/perf-lock.txt @@ -128,6 +128,23 @@ CONTENTION OPTIONS Use BPF program to collect lock contention stats instead of using the input data. +-a:: +--all-cpus:: + System-wide collection from all CPUs. + +-C:: +--cpu:: + Collect samples only on the list of CPUs provided. Multiple CPUs can be + provided as a comma-separated list with no space: 0,1. Ranges of CPUs + are specified with -: 0-2. Default is to monitor all CPUs. + +-p:: +--pid=:: + Record events on existing process ID (comma separated list). + +--tid=:: + Record events on existing thread ID (comma separated list). + SEE ALSO -------- |