Commit 44fb085b authored by Wanpeng Li's avatar Wanpeng Li Committed by Ingo Molnar

sched/deadline: Add rq->clock update skip for dl task yield

This patch adds rq->clock update skip for SCHED_DEADLINE task yield,
to tell update_rq_clock() that we've just updated the clock, so that
we don't do a microscopic update in schedule() and double the
fastpath cost.
Signed-off-by: default avatarWanpeng Li <wanpeng.li@linux.intel.com>
Cc: Juri Lelli <juri.lelli@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1425961200-3809-1-git-send-email-wanpeng.li@linux.intel.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 1e78cdbd
...@@ -914,6 +914,12 @@ static void yield_task_dl(struct rq *rq) ...@@ -914,6 +914,12 @@ static void yield_task_dl(struct rq *rq)
} }
update_rq_clock(rq); update_rq_clock(rq);
update_curr_dl(rq); update_curr_dl(rq);
/*
* Tell update_rq_clock() that we've just updated,
* so we don't do microscopic update in schedule()
* and double the fastpath cost.
*/
rq_clock_skip_update(rq, true);
} }
#ifdef CONFIG_SMP #ifdef CONFIG_SMP
......
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