• Namhyung Kim's avatar
    perf lock contention: Support lock addr/name filtering for BPF · 5e3febe7
    Namhyung Kim authored
    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: 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/20221219201732.460111-6-namhyung@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    5e3febe7
lock_contention.bpf.c 5 KB