| perf-stat - Run a command and gather performance counter statistics |
| 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] <command> |
| 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] -- <command> [<options>] |
| This command runs a command and gathers performance counter statistics |
| Any command you can specify in a shell. |
| Select the PMU event. Selection can be a symbolic event name |
| (use 'perf list' to list all events) or a raw PMU |
| event (eventsel+umask) in the form of rNNN where NNN is a |
| hexadecimal event descriptor. |
| child tasks inherit counters |
| stat events on existing pid |
| Performance counter stats for 'make -j': |
| 8117.370256 task clock ticks # 11.281 CPU utilization factor |
| 678 context switches # 0.000 M/sec |
| 133 CPU migrations # 0.000 M/sec |
| 235724 pagefaults # 0.029 M/sec |
| 24821162526 CPU cycles # 3057.784 M/sec |
| 18687303457 instructions # 2302.138 M/sec |
| 172158895 cache references # 21.209 M/sec |
| 27075259 cache misses # 3.335 M/sec |
| Wall-clock time elapsed: 719.554352 msecs |
| linkperf:perf-top[1], linkperf:perf-list[1] |