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sched: do not hurt SCHED_BATCH on wakeup

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measurements by Yanmin Zhang have shown that SCHED_BATCH tasks benefit
if they run the same place_entity() logic as SCHED_OTHER tasks - so
uniformize behavior in this area.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2007-12-18 15:21:13 +01:00
parent 2bacec8c31
commit 6cbf1c126c
1 changed files with 1 additions and 2 deletions
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3
kernel/sched_fair.c
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@ -511,8 +511,7 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
if (!initial) { if (!initial) {
/* sleeps upto a single latency don't count. */ /* sleeps upto a single latency don't count. */
if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se) && if (sched_feat(NEW_FAIR_SLEEPERS) && entity_is_task(se))
task_of(se)->policy != SCHED_BATCH)
vruntime -= sysctl_sched_latency; vruntime -= sysctl_sched_latency;
/* ensure we never gain time by being placed backwards. */ /* ensure we never gain time by being placed backwards. */