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authorIngo Molnar <mingo@elte.hu>2008-10-20 14:27:43 +0200
committerIngo Molnar <mingo@elte.hu>2008-10-20 14:27:43 +0200
commit0c4b83da58ec2e96ce9c44c211d6eac5f9dae478 (patch)
tree2bd2cfee12c1758fb1a27482b4178f86d538f904 /kernel/sched_features.h
parentf9c0b0950d5fd8c8c5af39bc061f27ea8fddcac3 (diff)
downloadlwn-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.h2
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)