From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263975AbUEMHTi (ORCPT ); Thu, 13 May 2004 03:19:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263869AbUEMHTg (ORCPT ); Thu, 13 May 2004 03:19:36 -0400 Received: from firecat.admindu.de ([213.178.172.5]:18312 "EHLO mail.admindu.de") by vger.kernel.org with ESMTP id S263895AbUEMHTI (ORCPT ); Thu, 13 May 2004 03:19:08 -0400 Message-ID: <40A33DA2.70708@kurtenba.ch> Date: Thu, 13 May 2004 11:19:30 +0200 From: clemens kurtenbach User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040413 MultiZilla/1.6.3.0d X-Accept-Language: de, en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Re: cpufreq and p4 prescott References: <20040512171433.GA10481@dominikbrodowski.de> In-Reply-To: <20040512171433.GA10481@dominikbrodowski.de> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, >>[ck@holodeck:cpufreq] cat /proc/cpuinfo | grep Mhz >>cpu MHz : 2807.131 >>cpu MHz : 2807.131 > > The cpu MHz entry in /proc/cpuinfo is the same for all CPUs, and no reliable > source to detect the current cpu frequency anyway. Use i thought this because on my ibook i can see different MHz entry's when cpudyn changes the frequence. > /sys/devices/system/cpu/cpu0/scaling_cur_freq or even cpuinfo_cur_freq for > that.[*] So p4-clockmod-throttling does work on your p4 prescott. > > Dominik > > [*] Available in 2.6.7, hopefully, if Linus merges the latest cpufreq-bk > tree from Dave. It'll be in the next -mm release, though. o.k, when i understand you right p4-clockmod-throttling _is working_ on my system, but i can't see this in /sys until Dave Jones patches are includet. So i patched my 2.6.6 kernel with cpufreq-2004-05-13.diff. Now cpuinfo_cur_freq and scaling_cur_freq show changing entry's when eg powernowd handles the frequence. The reason why i want to throttle down my prescott is the heat. Strange is that when the frequence is changed to 350MHz (after 30min running with 2.8GHz), neither the CPU&System temperature nor tools that calculate the CPU speed (like gkrellm-x86info) show a difference to 2.8GHz. All voltages on my system are the same with 350MHz/2.8GHz, too. So i'm not sure if throttling does work until now? thanks, clee -- moqua [at] gmx.net moqua [at] kurtenba.ch