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| author | David Ahern <[email protected]> | 2016-11-16 15:06:29 +0900 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <[email protected]> | 2016-11-23 10:44:07 -0300 |
| commit | 49394a2a24c78ce034fe0e732b1b54922c23fd92 (patch) | |
| tree | 02707b0cb678b1e91b8f177d9b4b2f46ebdacc24 /lib/test-string_helpers.c | |
| parent | 69b7e48070ca2ecee7498166259b5826b22e8b2e (diff) | |
perf sched timehist: Introduce timehist command
'perf sched timehist' provides an analysis of scheduling events.
Example usage:
perf sched record -- sleep 1
perf sched timehist
By default it shows the individual schedule events, including the wait
time (time between sched-out and next sched-in events for the task), the
task scheduling delay (time between wakeup and actually running) and run
time for the task:
time cpu task name wait time sch delay run time
[tid/pid] (msec) (msec) (msec)
-------------- ------ -------------------- --------- --------- ---------
79371.874569 [0011] gcc[31949] 0.014 0.000 1.148
79371.874591 [0010] gcc[31951] 0.000 0.000 0.024
79371.874603 [0010] migration/10[59] 3.350 0.004 0.011
79371.874604 [0011] <idle> 1.148 0.000 0.035
79371.874723 [0005] <idle> 0.016 0.000 1.383
79371.874746 [0005] gcc[31949] 0.153 0.078 0.022
...
Times are in msec.usec.
Committer note:
Add above explanation as the 'perf sched timehist' entry for 'man
perf-sched'.
Signed-off-by: David Ahern <[email protected]>
Signed-off-by: Namhyung Kim <[email protected]>
Acked-by: Ingo Molnar <[email protected]>
Acked-by: Jiri Olsa <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>
Diffstat (limited to 'lib/test-string_helpers.c')
0 files changed, 0 insertions, 0 deletions