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| author | Qais Yousef <qais.yousef@arm.com> | 2019-06-04 12:14:58 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-06-24 19:23:42 +0200 |
| commit | f9f240f96efc5bcec62379eac701523e11fbb45b (patch) | |
| tree | 14db974778a89448c842dd5c05946a78fafd560d /include/trace | |
| parent | 8de6242cca17d9299e654e29c966d8612d397272 (diff) | |
| download | linux-0-day-f9f240f96efc5bcec62379eac701523e11fbb45b.tar.gz linux-0-day-f9f240f96efc5bcec62379eac701523e11fbb45b.tar.xz | |
sched/debug: Add sched_overutilized tracepoint
The new tracepoint allows us to track the changes in overutilized
status.
Overutilized status is associated with EAS. It indicates that the system
is in high performance state. EAS is disabled when the system is in this
state since there's not much energy savings while high performance tasks
are pushing the system to the limit and it's better to default to the
spreading behavior of the scheduler.
This tracepoint helps understanding and debugging the conditions under
which this happens.
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavankumar Kondeti <pkondeti@codeaurora.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Perret <quentin.perret@arm.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Uwe Kleine-Konig <u.kleine-koenig@pengutronix.de>
Link: https://lkml.kernel.org/r/20190604111459.2862-6-qais.yousef@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/trace')
| -rw-r--r-- | include/trace/events/sched.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index c7dd9bc7f0017..420e80e56e551 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -621,6 +621,10 @@ DECLARE_TRACE(pelt_se_tp, TP_PROTO(struct sched_entity *se), TP_ARGS(se)); +DECLARE_TRACE(sched_overutilized_tp, + TP_PROTO(struct root_domain *rd, bool overutilized), + TP_ARGS(rd, overutilized)); + #endif /* _TRACE_SCHED_H */ /* This part must be outside protection */ |