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| author |   Brendan Gregg <bgregg@netflix.com> | 2017-03-14 01:56:29 +0000 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-03-14 15:17:38 -0300 |
| commit | 292c4a8f985b35b3738d5900fe256c4fed4cd3f5 (patch) | |
| tree | 2bf420fb13ab6fdee04a5e99db18b9bf673c8e59 /tools/perf/Documentation | |
| parent | perf tools: Add 'cgroup_id' sort order keyword (diff) | |
| download | linux-dev-292c4a8f985b35b3738d5900fe256c4fed4cd3f5.tar.xz linux-dev-292c4a8f985b35b3738d5900fe256c4fed4cd3f5.zip | |
perf sched timehist: Add --next option
The --next option shows the next task for each context switch, providing
more context for the sequence of scheduler events.
$ perf sched timehist --next | head
Samples do not have callchains.
time cpu task name waittime schdelay run time
[tid/pid] (msec) (msec) (msec)
---------- --- ---------- --------- ------ -----
374.793792 [0] <idle> 0.000 0.000 0.000 next: rngd[1524]
374.793801 [0] rngd[1524] 0.000 0.000 0.009 next: swapper/0[0]
374.794048 [7] <idle> 0.000 0.000 0.000 next: yes[30884]
374.794066 [7] yes[30884] 0.000 0.000 0.018 next: swapper/7[0]
374.794126 [2] <idle> 0.000 0.000 0.000 next: rngd[1524]
374.794140 [2] rngd[1524] 0.325 0.006 0.013 next: swapper/2[0]
374.794281 [3] <idle> 0.000 0.000 0.000 next: perf[31070]
Signed-off-by: Brendan Gregg <bgregg@netflix.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1489456589-32555-1-git-send-email-bgregg@netflix.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation')
| -rw-r--r-- | tools/perf/Documentation/perf-sched.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-sched.txt b/tools/perf/Documentation/perf-sched.txt index d33deddb0146..a092a2499e8f 100644 --- a/tools/perf/Documentation/perf-sched.txt +++ b/tools/perf/Documentation/perf-sched.txt @@ -132,6 +132,10 @@ OPTIONS for 'perf sched timehist' --migrations:: Show migration events. +-n:: +--next:: + Show next task. + -I:: --idle-hist:: Show idle-related events only. |