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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 <mingo@elte.hu>
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1 changed files with 0 additions and 11 deletions
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@ -379,15 +379,6 @@ update_stats_curr_start(struct cfs_rq *cfs_rq, struct sched_entity *se)
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se->exec_start = rq_of(cfs_rq)->clock;
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}
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/*
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* We are descheduling a task - update its stats:
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*/
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static inline void
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update_stats_curr_end(struct cfs_rq *cfs_rq, struct sched_entity *se)
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{
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se->exec_start = 0;
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}
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/**************************************************
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* Scheduling class queueing methods:
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*/
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@ -609,8 +600,6 @@ static void put_prev_entity(struct cfs_rq *cfs_rq, struct sched_entity *prev)
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if (prev->on_rq)
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update_curr(cfs_rq);
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update_stats_curr_end(cfs_rq, prev);
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check_spread(cfs_rq, prev);
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if (prev->on_rq) {
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update_stats_wait_start(cfs_rq, prev);
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