linux-kernel - [PATCH v5 03/12] sched: fix avg

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Message-Id: <1409051215-16788-4-git-send-email-vincent.guittot@linaro.org>
Date:	Tue, 26 Aug 2014 13:06:46 +0200
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	peterz@...radead.org, mingo@...nel.org,
	linux-kernel@...r.kernel.org, preeti@...ux.vnet.ibm.com,
	linux@....linux.org.uk, linux-arm-kernel@...ts.infradead.org
Cc:	riel@...hat.com, Morten.Rasmussen@....com, efault@....de,
	nicolas.pitre@...aro.org, linaro-kernel@...ts.linaro.org,
	daniel.lezcano@...aro.org, dietmar.eggemann@....com,
	Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH v5 03/12] sched: fix avg_load computation

The computation of avg_load and avg_load_per_task should only takes into
account the number of cfs tasks. The non cfs task are already taken into
account by decreasing the cpu's capacity and they will be tracked in the
CPU's utilization (group_utilization) of the next patches

Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
---
 kernel/sched/fair.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 87b9dc7..b85e9f7 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4092,7 +4092,7 @@ static unsigned long capacity_of(int cpu)
 static unsigned long cpu_avg_load_per_task(int cpu)
 {
 	struct rq *rq = cpu_rq(cpu);
-	unsigned long nr_running = ACCESS_ONCE(rq->nr_running);
+	unsigned long nr_running = ACCESS_ONCE(rq->cfs.h_nr_running);
 	unsigned long load_avg = rq->cfs.runnable_load_avg;
 
 	if (nr_running)
@@ -5985,7 +5985,7 @@ static inline void update_sg_lb_stats(struct lb_env *env,
 			load = source_load(i, load_idx);
 
 		sgs->group_load += load;
-		sgs->sum_nr_running += rq->nr_running;
+		sgs->sum_nr_running += rq->cfs.h_nr_running;
 
 		if (rq->nr_running > 1)
 			*overload = true;
-- 
1.9.1

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