| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 1 | perf-stat(1) |
| Ingo Molnar | 6e6b754 | 2008-04-15 22:39:31 +0200 | [diff] [blame] | 2 | ============ |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 3 | |
| 4 | NAME |
| 5 | ---- |
| 6 | perf-stat - Run a command and gather performance counter statistics |
| 7 | |
| 8 | SYNOPSIS |
| 9 | -------- |
| 10 | [verse] |
| Jaswinder Singh Rajput | dee4120 | 2009-06-23 02:22:39 +0530 | [diff] [blame^] | 11 | 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] <command> |
| 12 | 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] -- <command> [<options>] |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 13 | |
| 14 | DESCRIPTION |
| 15 | ----------- |
| 16 | This command runs a command and gathers performance counter statistics |
| 17 | from it. |
| 18 | |
| 19 | |
| 20 | OPTIONS |
| 21 | ------- |
| 22 | <command>...:: |
| 23 | Any command you can specify in a shell. |
| 24 | |
| Ingo Molnar | 20c84e9 | 2009-06-04 16:33:00 +0200 | [diff] [blame] | 25 | |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 26 | -e:: |
| 27 | --event=:: |
| Thomas Gleixner | 386b05e | 2009-06-06 14:56:33 +0200 | [diff] [blame] | 28 | Select the PMU event. Selection can be a symbolic event name |
| 29 | (use 'perf list' to list all events) or a raw PMU |
| 30 | event (eventsel+umask) in the form of rNNN where NNN is a |
| 31 | hexadecimal event descriptor. |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 32 | |
| Ingo Molnar | 20c84e9 | 2009-06-04 16:33:00 +0200 | [diff] [blame] | 33 | -i:: |
| 34 | --inherit:: |
| 35 | child tasks inherit counters |
| 36 | -p:: |
| 37 | --pid=<pid>:: |
| 38 | stat events on existing pid |
| 39 | |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 40 | -a:: |
| 41 | system-wide collection |
| 42 | |
| Jaswinder Singh Rajput | dee4120 | 2009-06-23 02:22:39 +0530 | [diff] [blame^] | 43 | -S:: |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 44 | scale counter values |
| 45 | |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 46 | EXAMPLES |
| 47 | -------- |
| 48 | |
| Ingo Molnar | 20c84e9 | 2009-06-04 16:33:00 +0200 | [diff] [blame] | 49 | $ perf stat -- make -j |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 50 | |
| Ingo Molnar | 20c84e9 | 2009-06-04 16:33:00 +0200 | [diff] [blame] | 51 | Performance counter stats for 'make -j': |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 52 | |
| Ingo Molnar | 20c84e9 | 2009-06-04 16:33:00 +0200 | [diff] [blame] | 53 | 8117.370256 task clock ticks # 11.281 CPU utilization factor |
| 54 | 678 context switches # 0.000 M/sec |
| 55 | 133 CPU migrations # 0.000 M/sec |
| 56 | 235724 pagefaults # 0.029 M/sec |
| 57 | 24821162526 CPU cycles # 3057.784 M/sec |
| 58 | 18687303457 instructions # 2302.138 M/sec |
| 59 | 172158895 cache references # 21.209 M/sec |
| 60 | 27075259 cache misses # 3.335 M/sec |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 61 | |
| Ingo Molnar | 20c84e9 | 2009-06-04 16:33:00 +0200 | [diff] [blame] | 62 | Wall-clock time elapsed: 719.554352 msecs |
| Ingo Molnar | 1d8c8b2 | 2009-04-20 15:52:29 +0200 | [diff] [blame] | 63 | |
| 64 | SEE ALSO |
| 65 | -------- |
| Thomas Gleixner | 386b05e | 2009-06-06 14:56:33 +0200 | [diff] [blame] | 66 | linkperf:perf-top[1], linkperf:perf-list[1] |