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sched/debug: Add new tracepoint to track PELT at se level 

The new tracepoint allows tracking PELT signals at sched_entity level.
Which is supported in CFS tasks and taskgroups only.

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/20190604111459.2862-5-qais.yousef@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Qais Yousef 2019-06-04 12:14:57 +01:00 committed by Ingo Molnar
parent ba19f51fcb
commit 8de6242cca
3 changed files with 7 additions and 0 deletions
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4
include/trace/events/sched.h
View File

@ -617,6 +617,10 @@ DECLARE_TRACE(pelt_irq_tp,
TP_PROTO(struct rq *rq),
TP_ARGS(rq));
DECLARE_TRACE(pelt_se_tp,
TP_PROTO(struct sched_entity *se),
TP_ARGS(se));
#endif /* _TRACE_SCHED_H */
/* This part must be outside protection */

1
kernel/sched/fair.c
View File

@ -3348,6 +3348,7 @@ static inline int propagate_entity_load_avg(struct sched_entity *se)
update_tg_cfs_runnable(cfs_rq, se, gcfs_rq);
trace_pelt_cfs_tp(cfs_rq);
trace_pelt_se_tp(se);
return 1;
}

2
kernel/sched/pelt.c
View File

@ -267,6 +267,7 @@ int __update_load_avg_blocked_se(u64 now, struct sched_entity *se)
{
if (___update_load_sum(now, &se->avg, 0, 0, 0)) {
___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
trace_pelt_se_tp(se);
return 1;
}
@ -280,6 +281,7 @@ int __update_load_avg_se(u64 now, struct cfs_rq *cfs_rq, struct sched_entity *se
___update_load_avg(&se->avg, se_weight(se), se_runnable(se));
cfs_se_util_change(&se->avg);
trace_pelt_se_tp(se);
return 1;
}