From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Paul Turner <pjt@google.com>
Cc: Mike Galbraith <efault@gmx.de>, john stultz <johnstul@us.ibm.com>,
Salman Qazi <sqazi@google.com>, Ingo Molnar <mingo@elte.hu>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] sched: avoid unnecessary overflow in sched_clock
Date: Wed, 16 Nov 2011 09:56:22 +0100 [thread overview]
Message-ID: <1321433782.1421.71.camel@twins> (raw)
In-Reply-To: <4EC36165.3090002@google.com>
On Tue, 2011-11-15 at 23:08 -0800, Paul Turner wrote:
> Probably a good idea -- This especially sucks rocks in the sched_clock_stable==1
> case; resulting in it coming straight back out of sched_clock_cpu() and trashing
> rq->clock.
There's another problem there in that TSC will wrap too soon and things
will blow up in your face that way.
next prev parent reply other threads:[~2011-11-16 8:56 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-15 21:59 Salman Qazi
2011-11-15 22:12 ` Salman Qazi
2011-11-15 23:02 ` john stultz
2011-11-16 0:07 ` Paul Turner
2011-11-16 6:41 ` Mike Galbraith
2011-11-16 7:08 ` Paul Turner
2011-11-16 8:56 ` Peter Zijlstra [this message]
2011-11-16 20:55 ` Salman Qazi
2011-11-18 23:45 ` [tip:sched/urgent] sched, x86: Avoid " tip-bot for Salman Qazi
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