From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946446AbWKJLMF (ORCPT ); Fri, 10 Nov 2006 06:12:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1946478AbWKJLMF (ORCPT ); Fri, 10 Nov 2006 06:12:05 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:61579 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1946446AbWKJLMD (ORCPT ); Fri, 10 Nov 2006 06:12:03 -0500 Date: Fri, 10 Nov 2006 12:10:48 +0100 From: Ingo Molnar To: Arjan van de Ven Cc: Thomas Gleixner , Andrew Morton , LKML , Len Brown , John Stultz , Andi Kleen , Roman Zippel Subject: Re: [patch 11/19] i386: Rework local APIC calibration Message-ID: <20061110111048.GA4780@elte.hu> References: <20061109233030.915859000@cruncher.tec.linutronix.de> <20061109233035.340517000@cruncher.tec.linutronix.de> <1163153841.3138.653.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1163153841.3138.653.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.2.2i X-ELTE-SpamScore: -2.8 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.8 required=5.9 tests=ALL_TRUSTED,AWL,BAYES_50 autolearn=no SpamAssassin version=3.0.3 -3.3 ALL_TRUSTED Did not pass through any untrusted hosts 0.5 BAYES_50 BODY: Bayesian spam probability is 40 to 60% [score: 0.5000] -0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Arjan van de Ven wrote: > On Thu, 2006-11-09 at 23:38 +0000, Thomas Gleixner wrote: > > plain text document attachment (i386-lapic-calibrate-timer.patch) > > From: Thomas Gleixner > > One question: why do the irq measurement at all if pmtimer is > available? the pmtimer read will always return zero on platforms where there's no pm-timer clock - in this case the irq measurement is what calibrates. Ingo