linux-kernel - Re: [URGENT rfc patch 0/3] tsc clocksource bug fix

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Message-ID: <alpine.DEB.2.02.1307041300020.11637@ionos.tec.linutronix.de>
Date:	Thu, 4 Jul 2013 13:00:52 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Alex Shi <alex.shi@...el.com>
cc:	hpa@...ux.intel.com, tim.c.chen@...ux.intel.com,
	linux-kernel@...r.kernel.org, andi.kleen@...el.com,
	a.p.zijlstra@...llo.nl, mingo@...e.hu
Subject: Re: [URGENT rfc patch 0/3] tsc clocksource bug fix

On Thu, 4 Jul 2013, Alex Shi wrote:

> We find some benchmarks drop a lot on tip/sched/core on many Intel boxes,
> like oltp, tbench, hackbench etc. and bisected the commit 5d33b883ae
> cause this regression. Due to this commit, the clocksource was changed
> to hpet from tsc even tsc will be set CLOCK_SOURCE_VALID_FOR_HRES later
> in clocksource_watchdog. 

5d33b883ae is not in tip/sched/core. So what are you testing and
bisecting?
 
Thanks,

	tglx
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