Messages in this thread | | | From | "Rafael J. Wysocki" <> | Subject | Re: [tbench regression fixes]: digging out smelly deadmen. | Date | Sun, 26 Oct 2008 12:33:41 +0100 |
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On Sunday, 26 of October 2008, David Miller wrote: > From: "Rafael J. Wysocki" <rjw@sisk.pl> > Date: Sat, 25 Oct 2008 13:13:20 +0200 > > > Could you please give me a pointer to the commit disabling the hrtimer feature? > > Here it is:
Thanks a lot!
> commit 0c4b83da58ec2e96ce9c44c211d6eac5f9dae478 > Author: Ingo Molnar <mingo@elte.hu> > 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 <davem@davemloft.net> > Acked-by: Peter Zijlstra <peterz@infradead.org> > Signed-off-by: Ingo Molnar <mingo@elte.hu> > > 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
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