• Arnaldo Carvalho de Melo's avatar
    perf hists: Print number of samples, not the period sum · 69cf0218
    Arnaldo Carvalho de Melo authored
    So that we match the header where we state the number of events with the
    "Samples" column when using 'perf report -n/--show-nr-samples':
    
     [root@emilia ~]# perf record -a sleep 1
     [ perf record: Woken up 1 times to write data ]
     [ perf record: Captured and wrote 0.111 MB perf.data (~4860 samples) ]
     [root@emilia ~]# perf report --stdio --show-nr-samples
     # Events: 11  cycles
     #
     # Overhead  Samples        Command       Shared Object                        Symbol
     # ........ ..........  ...........  ..................  ............................
     #
         16.65%          1        sleep  [kernel.kallsyms]   [k] unmap_vmas
         16.10%          1         perf  libpthread-2.12.so  [.] __pthread_cleanup_push_defer
         15.79%          2         perf  [kernel.kallsyms]   [k] format_decode
         12.88%          1  kworker/1:2  [kernel.kallsyms]   [k] cache_reap
         10.69%          1      swapper  [kernel.kallsyms]   [k] _raw_spin_lock
          7.55%          1        sleep  [kernel.kallsyms]   [k] prepare_exec_creds
          6.00%          1         perf  [jbd2]              [k] start_this_handle
          5.29%          1         perf  [kernel.kallsyms]   [k] seq_read
          4.75%          1         perf  [kernel.kallsyms]   [k] get_pid_task
          4.30%          1         perf  [kernel.kallsyms]   [k] _raw_spin_unlock_irqrestore
    
     #
     # (For a higher level overview, try: perf report --sort comm,dso)
     #
     [root@emilia ~]#
    Reported-by: default avatarStephane Eranian <eranian@google.com>
    Reported-by: default avatarCliff Wickman <cpw@sgi.com>
    Acked-by: default avatarStephane Eranian <eranian@google.com>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Mike Galbraith <efault@gmx.de>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Stephane Eranian <eranian@google.com>
    Cc: Tom Zanussi <tzanussi@gmail.com>
    Cc: <stable@kernel.org>
    LKML-Reference: <new-submission>
    Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    [ cherry-picked it from perf/core, as it has been reported by others as well. ]
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    69cf0218
hist.c 27.4 KB