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| author | Mike Galbraith <efault@gmx.de> | 2008-10-24 11:06:14 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-24 12:51:01 +0200 |
| commit | 0d13033bc9257fe65c1aa25e84568b1608da0901 (patch) | |
| tree | 312a3bbad942d2c27ee7e394bd5328dd9fe58fe1 | |
| parent | 1af5f730fc1bf7c62ec9fb2d307206e18bf40a69 (diff) | |
| download | linux-0d13033bc9257fe65c1aa25e84568b1608da0901.tar.gz linux-0d13033bc9257fe65c1aa25e84568b1608da0901.tar.bz2 linux-0d13033bc9257fe65c1aa25e84568b1608da0901.zip | |
sched: weaken sync hint
Mysql+oltp and pgsql+oltp peaks are still shifted right. The below puts
the peaks back to 1 client/server pair per core.
Use the avg_overlap information to weaken the sync hint.
Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/sched_fair.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index b27ccc52f6aa..b71ee2c62297 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1123,10 +1123,9 @@ wake_affine(struct sched_domain *this_sd, struct rq *this_rq, if (!(this_sd->flags & SD_WAKE_AFFINE) || !sched_feat(AFFINE_WAKEUPS)) return 0; - if (!sync && sched_feat(SYNC_WAKEUPS) && - curr->se.avg_overlap < sysctl_sched_migration_cost && - p->se.avg_overlap < sysctl_sched_migration_cost) - sync = 1; + if (sync && (curr->se.avg_overlap > sysctl_sched_migration_cost || + p->se.avg_overlap > sysctl_sched_migration_cost)) + sync = 0; /* * If sync wakeup then subtract the (maximum possible) |