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perf-stat
Langue: en
Version: 09/20/2010 (ubuntu - 24/10/10)
Section: 1 (Commandes utilisateur)
NAME
perf-stat - Run a command and gather performance counter statisticsSYNOPSIS
perf stat [-e <EVENT> | --event=EVENT] [-S] [-a] <command> perf stat [-e <EVENT> | --event=EVENT] [-S] [-a] --- <command> [<options>]
DESCRIPTION
This command runs a command and gathers performance counter statistics from it.
OPTIONS
<command>...
- Any command you can specify in a shell.
-e, --event=
- 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.
-i, --no-inherit
- child tasks do not inherit counters
-p, --pid=<pid>
- stat events on existing pid
-a
- system-wide collection
-c
- scale counter values
-B
- print large numbers with thousands' separators according to locale
EXAMPLES
$ perf stat --- make -j
-
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
SEE ALSO
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