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DEBUG: sched: add tracepoint for task load/util signals

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Signed-off-by: Juri Lelli <juri.lelli@arm.com>
This commit is contained in:
Juri Lelli 2015-11-09 12:07:27 +00:00 • committed by Leo Yan
parent 99ed4e57cb
commit 8017fd7418
2 changed files with 46 additions and 0 deletions
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43
include/trace/events/sched.h
View file

@ -586,6 +586,49 @@ TRACE_EVENT(sched_contrib_scale_f,
__entry->cpu, __entry->freq_scale_factor, __entry->cpu, __entry->freq_scale_factor,
__entry->cpu_scale_factor) __entry->cpu_scale_factor)
); );
/*
* Tracepoint for accounting sched averages for tasks.
*/
TRACE_EVENT(sched_load_avg_task,
TP_PROTO(struct task_struct *tsk, struct sched_avg *avg),
TP_ARGS(tsk, avg),
TP_STRUCT__entry(
__array( char, comm, TASK_COMM_LEN )
__field( pid_t, pid )
__field( int, cpu )
__field( unsigned long, load_avg )
__field( unsigned long, util_avg )
__field( u64, load_sum )
__field( u32, util_sum )
__field( u32, period_contrib )
),
TP_fast_assign(
memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
__entry->pid = tsk->pid;
__entry->cpu = task_cpu(tsk);
__entry->load_avg = avg->load_avg;
__entry->util_avg = avg->util_avg;
__entry->load_sum = avg->load_sum;
__entry->util_sum = avg->util_sum;
__entry->period_contrib = avg->period_contrib;
),
TP_printk("comm=%s pid=%d cpu=%d load_avg=%lu util_avg=%lu load_sum=%llu"
" util_sum=%u period_contrib=%u",
__entry->comm,
__entry->pid,
__entry->cpu,
__entry->load_avg,
__entry->util_avg,
(u64)__entry->load_sum,
(u32)__entry->util_sum,
(u32)__entry->period_contrib)
);
#endif /* _TRACE_SCHED_H */ #endif /* _TRACE_SCHED_H */
/* This part must be outside protection */ /* This part must be outside protection */

3
kernel/sched/fair.c
View file

@ -2731,6 +2731,9 @@ static inline void update_load_avg(struct sched_entity *se, int update_tg)
if (update_cfs_rq_load_avg(now, cfs_rq) && update_tg) if (update_cfs_rq_load_avg(now, cfs_rq) && update_tg)
update_tg_load_avg(cfs_rq, 0); update_tg_load_avg(cfs_rq, 0);
if (entity_is_task(se))
trace_sched_load_avg_task(task_of(se), &se->avg);
} }
static void attach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se) static void attach_entity_load_avg(struct cfs_rq *cfs_rq, struct sched_entity *se)