diff options
| author | Daniel Bristot de Oliveira <[email protected]> | 2015-10-08 15:36:06 -0300 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2015-10-12 09:45:25 +0200 |
| commit | 9babcd7929bc8967ae3bb6093f603b93c2f9958f (patch) | |
| tree | afcc5d2325bd494c484b828914517680ac7d3316 /tools/perf/util/trace-event-scripting.c | |
| parent | 25cb62b76430a91cc6195f902e61c2cb84ade622 (diff) | |
sched, tracing: Stop/start critical timings around the idle=poll idle loop
When using idle=poll, the preemptoff tracer is always showing
the idle task as the culprit for long latencies. That happens
because critical timings are not stopped before idle loop. This
patch stops critical timings before entering the idle loop,
starting it again after the idle loop.
This problem does not affect the irqsoff tracer because
interruptions are enabled before entering the idle loop.
Signed-off-by: Daniel Bristot de Oliveira <[email protected]>
Reviewed-by: Luis Claudio R. Goncalves <[email protected]>
Acked-by: Steven Rostedt <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Mike Galbraith <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Link: http://lkml.kernel.org/r/10fc3705874aef11dbe152a068b591a7be1899b4.1444314899.git.bristot@redhat.com
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions