Re: [tbench regression fixes]: digging out smelly deadmen.
From: Rafael J. Wysocki <hidden>
Date: 2008-10-26 11:29:25
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On Sunday, 26 of October 2008, David Miller wrote:
From: "Rafael J. Wysocki" <redacted> Date: Sat, 25 Oct 2008 13:13:20 +0200quoted
Could you please give me a pointer to the commit disabling the hrtimer feature?Here it is:
Thanks a lot!
quoted hunk ↗ jump to hunk
commit 0c4b83da58ec2e96ce9c44c211d6eac5f9dae478 Author: Ingo Molnar [off-list ref] Date: Mon Oct 20 14:27:43 2008 +0200 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 [off-list ref] Acked-by: Peter Zijlstra [off-list ref] Signed-off-by: Ingo Molnar [off-list ref]diff --git a/kernel/sched_features.h b/kernel/sched_features.h index 7c9e8f4..fda0162 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)
Rafael