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| author | Ingo Molnar <mingo@elte.hu> | 2008-10-20 14:27:43 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-20 14:27:43 +0200 |
| commit | 0c4b83da58ec2e96ce9c44c211d6eac5f9dae478 (patch) | |
| tree | 2bd2cfee12c1758fb1a27482b4178f86d538f904 /kernel/sched_features.h | |
| parent | f9c0b0950d5fd8c8c5af39bc061f27ea8fddcac3 (diff) | |
| download | lwn-0c4b83da58ec2e96ce9c44c211d6eac5f9dae478.tar.gz lwn-0c4b83da58ec2e96ce9c44c211d6eac5f9dae478.zip | |
sched: disable the hrtick for now
David Miller reported that hrtick update overhead has tripled the
wakeup overhead on Sparc64.
That is too much - disable the HRTICK feature for now by default,
until a faster implementation is found.
Reported-by: David Miller <davem@davemloft.net>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_features.h')
| -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 7c9e8f4a049f..fda016218296 100644 --- a/kernel/sched_features.h +++ b/kernel/sched_features.h @@ -5,7 +5,7 @@ SCHED_FEAT(START_DEBIT, 1) SCHED_FEAT(AFFINE_WAKEUPS, 1) SCHED_FEAT(CACHE_HOT_BUDDY, 1) SCHED_FEAT(SYNC_WAKEUPS, 1) -SCHED_FEAT(HRTICK, 1) +SCHED_FEAT(HRTICK, 0) SCHED_FEAT(DOUBLE_TICK, 0) SCHED_FEAT(ASYM_GRAN, 1) SCHED_FEAT(LB_BIAS, 1) |