• Namhyung Kim's avatar
    perf lock contention: Support lock type filtering for BPF · 529772c4
    Namhyung Kim authored
    Likewise, add type_filter BPF hash map and check it when user gave a
    lock type filter.
    
      $ sudo ./perf lock con -ab -Y rwlock -- ./perf bench sched messaging
      # Running 'sched/messaging' benchmark:
      # 20 sender and receiver processes per group
      # 10 groups == 400 processes run
    
           Total time: 0.203 [sec]
       contended  total wait  max wait  avg wait       type  caller
    
              15   156.19 us  19.45 us  10.41 us   rwlock:W  do_exit+0x36d
               1    11.12 us  11.12 us  11.12 us   rwlock:R  do_wait+0x8b
               1     5.09 us   5.09 us   5.09 us   rwlock:W  release_task+0x6e
    Signed-off-by: default avatarNamhyung 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/20221219201732.460111-4-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    529772c4
bpf_lock_contention.c 6.16 KB