From e5f32a3856caabe745381279f7f32e3b581b59dc Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 15 Oct 2007 17:00:18 +0200 Subject: [PATCH] sched: speed up context-switches a bit speed up context-switches a bit by not clearing p->exec_start. (as a side-effect, this also makes p->exec_start a universal timestamp available to cache-hot estimations.) Signed-off-by: Ingo Molnar --- kernel/sched_fair.c | 11 ----------- 1 file changed, 11 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index c240b72b4e..cea1fa32b3 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -379,15 +379,6 @@ update_stats_curr_start(struct cfs_rq *cfs_rq, struct sched_entity *se) se->exec_start = rq_of(cfs_rq)->clock; } -/* - * We are descheduling a task - update its stats: - */ -static inline void -update_stats_curr_end(struct cfs_rq *cfs_rq, struct sched_entity *se) -{ - se->exec_start = 0; -} - /************************************************** * Scheduling class queueing methods: */ @@ -609,8 +600,6 @@ static void put_prev_entity(struct cfs_rq *cfs_rq, struct sched_entity *prev) if (prev->on_rq) update_curr(cfs_rq); - update_stats_curr_end(cfs_rq, prev); - check_spread(cfs_rq, prev); if (prev->on_rq) { update_stats_wait_start(cfs_rq, prev); -- 2.39.5