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ANDROID: sched/events: Introduce overutilized trace event

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Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
Signed-off-by: Andres Oportus <andresoportus@google.com>
(cherry picked from commit 8e45d94128)
[ - Trivial cherry pick issues
  - Changed commit title for consistency ]
Signed-off-by: Quentin Perret <quentin.perret@arm.com>
Change-Id: I78fb5e82223558def0cf16105c233591cda81d5c
This commit is contained in:
Patrick Bellasi
2016-02-10 09:24:36 +00:00
committed by Quentin Perret
parent 3124a5b9d0
commit 6dfaed989e
2 changed files with 27 additions and 1 deletions
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21
include/trace/events/sched.h
View File

@@ -964,6 +964,27 @@ TRACE_EVENT(sched_boost_task,
__entry->margin)
);
/*
* Tracepoint for system overutilized flag
*/
TRACE_EVENT(sched_overutilized,
TP_PROTO(int overutilized),
TP_ARGS(overutilized),
TP_STRUCT__entry(
__field( int, overutilized )
),
TP_fast_assign(
__entry->overutilized = overutilized;
),
TP_printk("overutilized=%d",
__entry->overutilized)
);
#endif /* CONFIG_SMP */
#endif /* _TRACE_SCHED_H */

7
kernel/sched/fair.c
View File

@@ -5134,8 +5134,10 @@ static inline bool cpu_overutilized(int cpu)
static inline void update_overutilized_status(struct rq *rq)
{
if (!READ_ONCE(rq->rd->overutilized) && cpu_overutilized(rq->cpu))
if (!READ_ONCE(rq->rd->overutilized) && cpu_overutilized(rq->cpu)) {
WRITE_ONCE(rq->rd->overutilized, SG_OVERUTILIZED);
trace_sched_overutilized(1);
}
}
#else
static inline void update_overutilized_status(struct rq *rq) { }
@@ -8961,9 +8963,12 @@ next_group:
/* Update over-utilization (tipping point, U >= 0) indicator */
WRITE_ONCE(rd->overutilized, sg_status & SG_OVERUTILIZED);
trace_sched_overutilized(!!(sg_status & SG_OVERUTILIZED));
} else if (sg_status & SG_OVERUTILIZED) {
WRITE_ONCE(env->dst_rq->rd->overutilized, SG_OVERUTILIZED);
trace_sched_overutilized(1);
}
}
/**