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Date: Sun, 26 Oct 2008 12:33:41 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: David Miller <davem@...emloft.net> Cc: mingo@...e.hu, s0mbre@...rvice.net.ru, a.p.zijlstra@...llo.nl, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, efault@....de Subject: Re: [tbench regression fixes]: digging out smelly deadmen. On Sunday, 26 of October 2008, David Miller wrote: > From: "Rafael J. Wysocki" <rjw@...k.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@...e.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@...emloft.net> > Acked-by: Peter Zijlstra <peterz@...radead.org> > Signed-off-by: Ingo Molnar <mingo@...e.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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