perf sched timehist: Add -V/--cpu-visual option
The -V option provides a visual aid for sched switches by cpu:
$ perf sched timehist -V
time cpu 0123456789abc task name b/n time sch delay run time
[tid/pid] (msec) (msec) (msec)
--------------- ------ ------------- -------------------- --------- --------- ---------
...
2412598.429696 [0009] i <idle> 0.000 0.000 0.000
2412598.429767 [0002] s perf[7219] 0.000 0.000 0.000
2412598.429783 [0009] s perf[7220] 0.000 0.006 0.087
2412598.429794 [0010] i <idle> 0.000 0.000 0.000
2412598.429795 [0009] s migration/9[53] 0.000 0.003 0.011
2412598.430370 [0010] s sleep[7220] 0.011 0.000 0.576
2412598.432584 [0003] i <idle> 0.000 0.000 0.000
...
Committer notes:
'i' marks idle time, 's' are scheduler events.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20161116060634.28477-8-namhyung@kernel.org
[ Add documentation based on above commit message ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 files changed