tree 58baf1524707635c5f58de9b601e34fc37049c73
parent 511e19b9e2112463c33a744ecb8a798056074408
author Namhyung Kim <namhyung@kernel.org> 1671481051 -0800
committer Arnaldo Carvalho de Melo <acme@redhat.com> 1671645159 -0300

perf lock contention: Support lock addr/name filtering for BPF

Likewise, add addr_filter BPF hash map and check it with the lock
address.

  $ sudo ./perf lock con -ab -L tasklist_lock -- ./perf bench sched messaging
  # Running 'sched/messaging' benchmark:
  # 20 sender and receiver processes per group
  # 10 groups == 400 processes run

       Total time: 0.169 [sec]
   contended  total wait  max wait  avg wait      type  caller

          18   174.09 us  25.31 us   9.67 us  rwlock:W  do_exit+0x36d
           5    32.34 us  10.87 us   6.47 us  rwlock:R  do_wait+0x8b
           4    15.41 us   4.73 us   3.85 us  rwlock:W  release_task+0x6e

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/20221219201732.460111-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>