linux-kernel - [PATCH 2/2] sched: Trace point sched_stat

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Date:	Mon, 27 Jul 2015 09:11:52 -0400
From:	yangoliver <yang_oliver@...mail.com>
To:	rostedt@...dmis.org
CC:	mingo@...hat.com, linux-kernel@...r.kernel.org,
	Yong Yang <yangoliver@...il.com>
Subject: [PATCH 2/2] sched: Trace point sched_stat_sleep should cover iowait case

Per sched_stat_sleep definition in sched.h, it should include
iowait case. This can also relect the design of sum_sleep_runtime
statistic, as this counter also includes the io_wait.

Signed-off-by: Yong Yang <yangoliver@...il.com>
---
 kernel/sched/fair.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d113c3b..85677bf 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3018,6 +3018,8 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
 		se->statistics.sum_sleep_runtime += delta;
 
 		if (tsk) {
+			trace_sched_stat_sleep(tsk, delta);
+
 			if (tsk->in_iowait) {
 				se->statistics.iowait_sum += delta;
 				se->statistics.iowait_count++;
-- 
2.4.0

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