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DEBUG: sched: add tracepoint for RD overutilized

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Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
This commit is contained in:
Patrick Bellasi 2016-02-10 09:24:36 +00:00 • committed by John Stultz
parent c5a00c2dad
commit 93db70f21c
2 changed files with 33 additions and 4 deletions
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20
include/trace/events/sched.h
View file

@ -888,6 +888,26 @@ TRACE_EVENT(sched_tune_filter,
__entry->payoff, __entry->region) __entry->payoff, __entry->region)
); );
/*
* Tracepoint for system overutilized flag
*/
TRACE_EVENT(sched_overutilized,
TP_PROTO(bool overutilized),
TP_ARGS(overutilized),
TP_STRUCT__entry(
__field( bool, overutilized )
),
TP_fast_assign(
__entry->overutilized = overutilized;
),
TP_printk("overutilized=%d",
__entry->overutilized ? 1 : 0)
);
#ifdef CONFIG_SCHED_WALT #ifdef CONFIG_SCHED_WALT
struct rq; struct rq;

21
kernel/sched/fair.c
View file

@ -4242,8 +4242,10 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags)
if (!se) { if (!se) {
walt_inc_cumulative_runnable_avg(rq, p); walt_inc_cumulative_runnable_avg(rq, p);
if (!task_new && !rq->rd->overutilized && if (!task_new && !rq->rd->overutilized &&
cpu_overutilized(rq->cpu)) cpu_overutilized(rq->cpu)) {
rq->rd->overutilized = true; rq->rd->overutilized = true;
trace_sched_overutilized(true);
}
/* /*
* We want to potentially trigger a freq switch * We want to potentially trigger a freq switch
@ -7503,12 +7505,17 @@ next_group:
env->dst_rq->rd->overload = overload; env->dst_rq->rd->overload = overload;
/* Update over-utilization (tipping point, U >= 0) indicator */ /* Update over-utilization (tipping point, U >= 0) indicator */
if (env->dst_rq->rd->overutilized != overutilized) if (env->dst_rq->rd->overutilized != overutilized) {
env->dst_rq->rd->overutilized = overutilized; env->dst_rq->rd->overutilized = overutilized;
} else { trace_sched_overutilized(overutilized);
if (!env->dst_rq->rd->overutilized && overutilized)
env->dst_rq->rd->overutilized = true;
} }
} else {
if (!env->dst_rq->rd->overutilized && overutilized) {
env->dst_rq->rd->overutilized = true;
trace_sched_overutilized(true);
}
}
} }
/** /**
@ -8948,8 +8955,10 @@ static void task_tick_fair(struct rq *rq, struct task_struct *curr, int queued)
task_tick_numa(rq, curr); task_tick_numa(rq, curr);
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
if (!rq->rd->overutilized && cpu_overutilized(task_cpu(curr))) if (!rq->rd->overutilized && cpu_overutilized(task_cpu(curr))) {
rq->rd->overutilized = true; rq->rd->overutilized = true;
trace_sched_overutilized(true);
}
rq->misfit_task = !task_fits_max(curr, rq->cpu); rq->misfit_task = !task_fits_max(curr, rq->cpu);
#endif #endif