Commit 795949da authored Oct 20, 2015 by Vincent Guittot Committed by Dmitry Shmidt Jan 31, 2017

ANDROID: sched: remove call of sched_avg_update from sched_rt_avg_update



rt_avg is only used to scale the available CPU's capacity for CFS
tasks.  As the update of this scaling is done during periodic load
balance, we only have to ensure that sched_avg_update has been called
before any periodic load balancing. This requirement is already
fulfilled by __update_cpu_load so the call in sched_rt_avg_update,
which is part of the hotpath, is useless.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
Signed-off-by: Steve Muckle <smuckle@linaro.org>
Signed-off-by: Andres Oportus <andresoportus@google.com>

parent bb5fca24

kernel/sched/sched.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -1643,7 +1643,6 @@ static inline void set_dl_cpu_capacity(int cpu, bool request,
		static inline void sched_rt_avg_update(struct rq *rq, u64 rt_delta)
		{
		rq->rt_avg += rt_delta * arch_scale_freq_capacity(NULL, cpu_of(rq));
		sched_avg_update(rq);
		}
		#else
		static inline void sched_rt_avg_update(struct rq *rq, u64 rt_delta) { }