Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755345AbYFKN6a (ORCPT ); Wed, 11 Jun 2008 09:58:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755097AbYFKN6W (ORCPT ); Wed, 11 Jun 2008 09:58:22 -0400 Received: from casper.infradead.org ([85.118.1.10]:42833 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751447AbYFKN6V (ORCPT ); Wed, 11 Jun 2008 09:58:21 -0400 Date: Wed, 11 Jun 2008 06:58:16 -0700 From: Arjan van de Ven To: Jan Engelhardt Cc: "Kok, Auke" , "solsTiCe d'Hiver" , linux-kernel@vger.kernel.org Subject: Re: PROBLEM: no cpu MHz in /proc/cpuinfo on 2.6.25.4-rt6 Message-ID: <20080611065816.6cff290d@infradead.org> In-Reply-To: References: <200806102152.23286.solstice.dhiver@gmail.com> <20080610131314.5f7069e6@infradead.org> <484EE71A.40002@intel.com> <20080611063639.5e1eea5b@infradead.org> Organization: Intel X-Mailer: Claws Mail 3.3.1 (GTK+ 2.12.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1330 Lines: 37 On Wed, 11 Jun 2008 15:52:57 +0200 (CEST) Jan Engelhardt wrote: > > On Wednesday 2008-06-11 15:36, Arjan van de Ven wrote: > >> >> btw this is scary; the Mhz line in /proc/cpuinfo doesn't have > >> >> much meaning really, so applications using it and depending on > >> >> it is a rather big disaster ;-( > >> >> > >> >> Does anyone know why jackd wants to use this? > >> > >> It would be nice to have a /sys file where the CPU frequency is in, > > > >may I ask why? What would you do with it? > > Off the top off the head, just for reporting to the user. Desklets > and stuff. even then it doesn't mean much ;-( > >CPU frequency is... > >1) not something that is fixed; it changes all the time > >2) not a good indication for performance; remember the 3.4Ghz > >pentium4, a 2Ghz Core2Duo outperforms it > >3) something which the cpu itself barely honors (the clock stops > >during idle etc etc) -- If you want to reach me at my work email, use arjan@linux.intel.com For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/