linux-kernel - [PATCH 3/3] cpufreq/schedutil: add rt utilization tracking

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Date:   Wed, 22 Nov 2017 15:35:55 +0100
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     peterz@...radead.org, mingo@...nel.org,
        linux-kernel@...r.kernel.org, rjw@...ysocki.net
Cc:     juri.lelli@....com, dietmar.eggemann@....com,
        Morten.Rasmussen@....com, viresh.kumar@...aro.org,
        Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH 3/3] cpufreq/schedutil: add rt utilization tracking

add both cfs and rt utilization when selecting an OPP as rt can preempt and
steal cfs's running time

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

diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c
index 9209d83..d06a41e 100644
--- a/kernel/sched/cpufreq_schedutil.c
+++ b/kernel/sched/cpufreq_schedutil.c
@@ -183,7 +183,7 @@ static void sugov_get_util(unsigned long *util, unsigned long *max, int cpu)
 
 	cfs_max = arch_scale_cpu_capacity(NULL, cpu);
 
-	*util = min(rq->cfs.avg.util_avg, cfs_max);
+	*util = min(rq->cfs.avg.util_avg + rq->rt.avg.util_avg, cfs_max);
 	*max = cfs_max;
 }
 
-- 
2.7.4