linux-kernel - Re: [patch 00/22] high resolution timers / dynamic ticks

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Message-Id: <1160119688.3000.91.camel@laptopd505.fenrus.org>
Date:	Fri, 06 Oct 2006 09:28:08 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andi Kleen <ak@...e.de>
Cc:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <johnstul@...ibm.com>,
	Valdis Kletnieks <valdis.kletnieks@...edu>,
	Dave Jones <davej@...hat.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Jim Gettys <jg@...top.org>,
	Roman Zippel <zippel@...ux-m68k.org>, akpm@...l.org
Subject: Re: [patch 00/22] high resolution timers / dynamic ticks - V3


> But usually the problem wasn't that it was too slow, but that
> it completely stopped in C2 or deeper. I don't think there
> is a way to work around that except for not using C2 or deeper
> (not an option) or using a different timer source.

actually it's supposed to be C3 where lapic stops, not C2.

For systems with C3, lapic is not usable for timers as is, and hpet or
similar needs to be used instead.


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