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authorMike Galbraith <efault@gmx.de>2008-10-24 11:06:14 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-24 12:51:01 +0200
commit0d13033bc9257fe65c1aa25e84568b1608da0901 (patch)
tree312a3bbad942d2c27ee7e394bd5328dd9fe58fe1 /kernel
parent1af5f730fc1bf7c62ec9fb2d307206e18bf40a69 (diff)
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>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched_fair.c7
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)