Messages in this thread Patch in this message | | | Subject | [patchlet] sched: minor fast-path overhead reduction | From | Mike Galbraith <> | Date | Fri, 17 Oct 2008 15:33:21 +0200 |
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Greetings,
103638d added a bit of avoidable overhead to the fast-path.
Use sysctl_sched_min_granularity instead of sched_slice() to restrict buddy wakeups.
Signed-off-by: Mike Galbraith <efault@gmx.de>
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 18fd171..6708493 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -747,7 +747,7 @@ pick_next(struct cfs_rq *cfs_rq, struct sched_entity *se) struct rq *rq = rq_of(cfs_rq); u64 pair_slice = rq->clock - cfs_rq->pair_start; - if (!cfs_rq->next || pair_slice > sched_slice(cfs_rq, cfs_rq->next)) { + if (!cfs_rq->next || pair_slice > sysctl_sched_min_granularity) { cfs_rq->pair_start = rq->clock; return se; }
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