From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161091AbWJFH2S (ORCPT ); Fri, 6 Oct 2006 03:28:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161093AbWJFH2S (ORCPT ); Fri, 6 Oct 2006 03:28:18 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:17130 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S1161091AbWJFH2R (ORCPT ); Fri, 6 Oct 2006 03:28:17 -0400 Subject: Re: [patch 00/22] high resolution timers / dynamic ticks - V3 From: Arjan van de Ven To: Andi Kleen Cc: Ingo Molnar , Thomas Gleixner , LKML , John Stultz , Valdis Kletnieks , Dave Jones , David Woodhouse , Jim Gettys , Roman Zippel , akpm@osdl.org In-Reply-To: References: <20061004172217.092570000@cruncher.tec.linutronix.de> <20061005011608.b69e3461.akpm@osdl.org> <20061005081725.GA28877@elte.hu> Content-Type: text/plain Organization: Intel International BV Date: Fri, 06 Oct 2006 09:28:08 +0200 Message-Id: <1160119688.3000.91.camel@laptopd505.fenrus.org> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-2.fc4) Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > 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.