projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1d8c8b20 | 1 | perf-stat(1) |
| 6e6b754f | 2 | ============ |
| 1d8c8b20 IM |
3 | |
| 4 | NAME | |
| 5 | ---- | |
| 6 | perf-stat - Run a command and gather performance counter statistics | |
| 7 | ||
| 8 | SYNOPSIS | |
| 9 | -------- | |
| 10 | [verse] | |
| dee41206 JSR |
11 | 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] <command> |
| 12 | 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] -- <command> [<options>] | |
| 1d8c8b20 IM |
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 | ||
| 20c84e95 | 25 | |
| 1d8c8b20 IM |
26 | -e:: |
| 27 | --event=:: | |
| 386b05e3 TG |
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. | |
| 1d8c8b20 | 32 | |
| 20c84e95 | 33 | -i:: |
| 2e6cdf99 SE |
34 | --no-inherit:: |
| 35 | child tasks do not inherit counters | |
| 20c84e95 IM |
36 | -p:: |
| 37 | --pid=<pid>:: | |
| 38 | stat events on existing pid | |
| 39 | ||
| 1d8c8b20 IM |
40 | -a:: |
| 41 | system-wide collection | |
| 42 | ||
| b26bc5a7 | 43 | -c:: |
| 1d8c8b20 IM |
44 | scale counter values |
| 45 | ||
| 5af52b51 SE |
46 | -B:: |
| 47 | print large numbers with thousands' separators according to locale | |
| 48 | ||
| c45c6ea2 SE |
49 | -C:: |
| 50 | --cpu=:: | |
| 51 | Count only on the list of cpus provided. Multiple CPUs can be provided as a | |
| 52 | comma-sperated list with no space: 0,1. Ranges of CPUs are specified with -: 0-2. | |
| 53 | In per-thread mode, this option is ignored. The -a option is still necessary | |
| 54 | to activate system-wide monitoring. Default is to count on all CPUs. | |
| 55 | ||
| f5b4a9c3 SE |
56 | -A:: |
| 57 | --no-aggr:: | |
| 58 | Do not aggregate counts across all monitored CPUs in system-wide mode (-a). | |
| 59 | This option is only valid in system-wide mode. | |
| 60 | ||
| 1d8c8b20 IM |
61 | EXAMPLES |
| 62 | -------- | |
| 63 | ||
| 20c84e95 | 64 | $ perf stat -- make -j |
| 1d8c8b20 | 65 | |
| 20c84e95 | 66 | Performance counter stats for 'make -j': |
| 1d8c8b20 | 67 | |
| 20c84e95 IM |
68 | 8117.370256 task clock ticks # 11.281 CPU utilization factor |
| 69 | 678 context switches # 0.000 M/sec | |
| 70 | 133 CPU migrations # 0.000 M/sec | |
| 71 | 235724 pagefaults # 0.029 M/sec | |
| 72 | 24821162526 CPU cycles # 3057.784 M/sec | |
| 73 | 18687303457 instructions # 2302.138 M/sec | |
| 74 | 172158895 cache references # 21.209 M/sec | |
| 75 | 27075259 cache misses # 3.335 M/sec | |
| 1d8c8b20 | 76 | |
| 20c84e95 | 77 | Wall-clock time elapsed: 719.554352 msecs |
| 1d8c8b20 IM |
78 | |
| 79 | SEE ALSO | |
| 80 | -------- | |
| 386b05e3 | 81 | linkperf:perf-top[1], linkperf:perf-list[1] |