git.oblomov.eu Git - linux-2.6/blob - Documentation/perf_counter/Documentation/perf-stat.txt

   1 perf-stat(1)
   2 ==========
   3
   4 NAME
   5 ----
   6 perf-stat - Run a command and gather performance counter statistics
   7
   8 SYNOPSIS
   9 --------
  10 [verse]
  11 'perf stat' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
  12
  13 DESCRIPTION
  14 -----------
  15 This command runs a command and gathers performance counter statistics
  16 from it.
  17
  18
  19 OPTIONS
  20 -------
  21 <command>...::
  22         Any command you can specify in a shell.
  23
  24 -e::
  25 --event=::
  26                              0:0: cpu-cycles
  27                              0:0: cycles
  28                              0:1: instructions
  29                              0:2: cache-references
  30                              0:3: cache-misses
  31                              0:4: branch-instructions
  32                              0:4: branches
  33                              0:5: branch-misses
  34                              0:6: bus-cycles
  35                              1:0: cpu-clock
  36                              1:1: task-clock
  37                              1:2: page-faults
  38                              1:2: faults
  39                              1:5: minor-faults
  40                              1:6: major-faults
  41                              1:3: context-switches
  42                              1:3: cs
  43                              1:4: cpu-migrations
  44                              1:4: migrations
  45                            rNNN: raw PMU events (eventsel+umask)
  46
  47 -a::
  48         system-wide collection
  49
  50 -l::
  51         scale counter values
  52
  53 Configuration
  54 -------------
  55
  56 EXAMPLES
  57 --------
  58
  59 $ perf stat sleep 1
  60
  61  Performance counter stats for 'sleep':
  62
  63        0.678356  task clock ticks     (msecs)
  64               7  context switches     (events)
  65               4  CPU migrations       (events)
  66             232  pagefaults           (events)
  67         1810403  CPU cycles           (events)
  68          946759  instructions         (events)
  69           18952  cache references     (events)
  70            4885  cache misses         (events)
  71
  72  Wall-clock time elapsed:  1001.252894 msecs
  73
  74 SEE ALSO
  75 --------
  76 linkperf:git-tops[1]