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From:   Thara Gopinath <thara.gopinath@linaro.org>
To:     linux-kernel@vger.kernel.org, mingo@redhat.com,
        peterz@infradead.org, rui.zhang@intel.com
Cc:     gregkh@linuxfoundation.org, rafael@kernel.org,
        amit.kachhap@gmail.com, viresh.kumar@linaro.org,
        javi.merino@kernel.org, edubezval@gmail.com,
        daniel.lezcano@linaro.org, linux-pm@vger.kernel.org,
        quentin.perret@arm.com, ionela.voinescu@arm.com,
        vincent.guittot@linaro.org
Subject: [RFC PATCH 6/7] sched/fair: update cpu_capcity to reflect thermal pressure
Date:   Tue,  9 Oct 2018 12:25:01 -0400
Message-Id: <1539102302-9057-7-git-send-email-thara.gopinath@linaro.org>
In-Reply-To: <1539102302-9057-1-git-send-email-thara.gopinath@linaro.org>
References: <1539102302-9057-1-git-send-email-thara.gopinath@linaro.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

cpu_capacity relflects the maximum available capacity of a cpu. Thermal
pressure on a cpu means this maximum available capacity is reduced. This
patch reduces the average thermal pressure for a cpu from its maximum
available capacity so that cpu_capacity reflects the actual
available capacity.

Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
---
 kernel/sched/fair.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 7deb1d0..8651e55 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7497,6 +7497,7 @@ static unsigned long scale_rt_capacity(int cpu)
 
 	used = READ_ONCE(rq->avg_rt.util_avg);
 	used += READ_ONCE(rq->avg_dl.util_avg);
+	used += READ_ONCE(rq->avg_thermal.load_avg);
 
 	if (unlikely(used >= max))
 		return 1;
-- 
2.1.4