6 perf-stat - Run a command and gather performance counter statistics
11 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] <command>
12 'perf stat' [-e <EVENT> | --event=EVENT] [-S] [-a] -- <command> [<options>]
16 This command runs a command and gathers performance counter statistics
23 Any command you can specify in a shell.
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.
35 child tasks inherit counters
38 stat events on existing pid
41 system-wide collection
49 $ perf stat -- make -j
51 Performance counter stats for 'make -j':
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
62 Wall-clock time elapsed: 719.554352 msecs
66 linkperf:perf-top[1], linkperf:perf-list[1]