linux-kernel - [PATCH 3/8] sched: change update_rq_runnable_avg using h_nr

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Date:	Sun, 18 Aug 2013 16:25:17 +0800
From:	Lei Wen <leiwen@...vell.com>
To:	Paul Turner <pjt@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>, <mingo@...hat.com>,
	<leiwen@...vell.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/8] sched: change update_rq_runnable_avg using h_nr_running

Since update_rq_runnable_avg is used only by cfs scheduler, it
should not consider the task beyond the cfs type.

If one cfs task is running with one rt task, the only cfs task
should be no aware of the existence of rt task, and behavior
like one cfs task occasionly throttled by some bandwidth control
mechanism. Thus its sleep time should not being taken into
runnable avg load calculation.

Signed-off-by: Lei Wen <leiwen@...vell.com>
---
 kernel/sched/fair.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index e6b99b4..9869d4d 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2893,7 +2893,7 @@ enqueue_task_fair(struct rq *rq, struct task_struct *p, int flags)
 	}
 
 	if (!se) {
-		update_rq_runnable_avg(rq, rq->nr_running);
+		update_rq_runnable_avg(rq, rq->cfs.h_nr_running);
 		inc_nr_running(rq);
 	}
 	hrtick_update(rq);
@@ -4142,7 +4142,7 @@ static void __update_blocked_averages_cpu(struct task_group *tg, int cpu)
 			list_del_leaf_cfs_rq(cfs_rq);
 	} else {
 		struct rq *rq = rq_of(cfs_rq);
-		update_rq_runnable_avg(rq, rq->nr_running);
+		update_rq_runnable_avg(rq, rq->cfs.h_nr_running);
 	}
 }
 
-- 
1.7.5.4

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