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| author |   Ingo Molnar <mingo@elte.hu> | 2008-09-22 16:29:00 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-22 16:29:00 +0200 |
| commit | f681bbd656b01439be904250a1581ca9c27505a1 (patch) | |
| tree | 4cf4690c4005c3f1c1f98020af62b03b69dcc85a /kernel | |
| parent | sched: wakeup preempt when small overlap (diff) | |
| download | linux-dev-f681bbd656b01439be904250a1581ca9c27505a1.tar.xz linux-dev-f681bbd656b01439be904250a1581ca9c27505a1.zip | |
sched: turn off WAKEUP_OVERLAP
WAKEUP_OVERLAP is not a winner on a 16way box, running psql+sysbench:
.27-rc7-NO_WAKEUP_OVERLAP .27-rc7-WAKEUP_OVERLAP
-------------------------------------------------
1: 694 811 +14.39%
2: 1454 1427 -1.86%
4: 3017 3070 +1.70%
8: 5694 5808 +1.96%
16: 10592 10612 +0.19%
32: 9693 9647 -0.48%
64: 8507 8262 -2.97%
128: 8402 7087 -18.55%
256: 8419 5124 -64.30%
512: 7990 3671 -117.62%
-------------------------------------------------
SUM: 64466 55524 -16.11%
... so turn it off by default.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched_features.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched_features.h b/kernel/sched_features.h index bf027a7accf8..7c9e8f4a049f 100644 --- a/kernel/sched_features.h +++ b/kernel/sched_features.h @@ -11,4 +11,4 @@ SCHED_FEAT(ASYM_GRAN, 1) SCHED_FEAT(LB_BIAS, 1) SCHED_FEAT(LB_WAKEUP_UPDATE, 1) SCHED_FEAT(ASYM_EFF_LOAD, 1) -SCHED_FEAT(WAKEUP_OVERLAP, 1) +SCHED_FEAT(WAKEUP_OVERLAP, 0) |