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| author | Ingo Molnar <mingo@elte.hu> | 2008-03-14 22:16:08 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-03-15 03:02:50 +0100 |
| commit | e22ecef1d2658ba54ed7d3fdb5d60829fb434c23 (patch) | |
| tree | 49069e160107578ec8212d969b599e03d7a62fae | |
| parent | sched: fix overload performance: buddy wakeups (diff) | |
| download | linux-e22ecef1d2658ba54ed7d3fdb5d60829fb434c23.tar.xz linux-e22ecef1d2658ba54ed7d3fdb5d60829fb434c23.zip | |
sched: fix fair sleepers
Fair sleepers need to scale their latency target down by runqueue
weight. Otherwise busy systems will gain ever larger sleep bonus.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
| -rw-r--r-- | kernel/sched_fair.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 31c4a2988b64..31aa1b9fa762 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -528,8 +528,10 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial) if (!initial) { /* sleeps upto a single latency don't count. */ - if (sched_feat(NEW_FAIR_SLEEPERS)) - vruntime -= sysctl_sched_latency; + if (sched_feat(NEW_FAIR_SLEEPERS)) { + vruntime -= calc_delta_fair(sysctl_sched_latency, + &cfs_rq->load); + } /* ensure we never gain time by being placed backwards. */ vruntime = max_vruntime(se->vruntime, vruntime); |