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| author | Namhyung Kim <namhyung@kernel.org> | 2022-12-09 11:07:25 -0800 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-12-14 11:24:31 -0300 |
| commit | eca949b2b4addd941d369d4c2014b87f3c3e203b (patch) | |
| tree | 722907c1e3f3b8a96b48c83eaed99f4df6621029 /lib/mpi/mpi-add.c | |
| parent | fd507d3e359c7e06d74321cd3d8a5ec8769d05a9 (diff) | |
perf lock contention: Implement -t/--threads option for BPF
The BPF didn't show the per-thread stat properly. Use task's thread id (PID)
as a key instead of stack_id and add a task_data map to save task comm names.
$ sudo ./perf lock con -abt -E 5 sleep 1
contended total wait max wait avg wait pid comm
1 740.66 ms 740.66 ms 740.66 ms 1950 nv_queue
3 305.50 ms 298.19 ms 101.83 ms 1884 nvidia-modeset/
1 25.14 us 25.14 us 25.14 us 2725038 EventManager_De
12 23.09 us 9.30 us 1.92 us 0 swapper
1 20.18 us 20.18 us 20.18 us 2725033 EventManager_De
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Blake Jones <blakejones@google.com>
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: Song Liu <song@kernel.org>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20221209190727.759804-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'lib/mpi/mpi-add.c')
0 files changed, 0 insertions, 0 deletions