Messages in this thread Patch in this message | | | From | Steve Muckle <> | Subject | [RFCv6 PATCH 08/10] sched: remove call of sched_avg_update from sched_rt_avg_update | Date | Tue, 8 Dec 2015 22:19:29 -0800 |
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From: Vincent Guittot <vincent.guittot@linaro.org>
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> --- kernel/sched/sched.h | 1 - 1 file changed, 1 deletion(-)
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 90d5df6..08858d1 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1497,7 +1497,6 @@ 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) { } -- 2.4.10
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