From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753850AbZBGTzd (ORCPT ); Sat, 7 Feb 2009 14:55:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752564AbZBGTz0 (ORCPT ); Sat, 7 Feb 2009 14:55:26 -0500 Received: from casper.infradead.org ([85.118.1.10]:54064 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752372AbZBGTzZ convert rfc822-to-8bit (ORCPT ); Sat, 7 Feb 2009 14:55:25 -0500 Date: Sat, 7 Feb 2009 11:55:45 -0800 From: Arjan van de Ven To: Toralf =?UTF-8?B?RsO2cnN0ZXI=?= Cc: linux-kernel@vger.kernel.org Subject: Re: cpu frequency maximized even for a niced job w/ v2.6.29-rc3 Message-ID: <20090207115545.724911be@infradead.org> In-Reply-To: <200902071130.10463.toralf.foerster@gmx.de> References: <200902071130.10463.toralf.foerster@gmx.de> Organization: Intel X-Mailer: Claws Mail 3.7.0 (GTK+ 2.14.5; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT 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 On Sat, 7 Feb 2009 11:30:10 +0100 Toralf Förster wrote: > I'm wondering, why my ThinkPad T41 goes from 600 MHz to 1.7 GHz if I > run this job : > > $> while [[ true ]]; do nice -3 factor 273244676154386297; done > > under v2.6.29-rc3-562-geda58a8. > > Former version stays at min frequency (600 MHz). The kernel has defaulted to this for I think a really long time; maybe your "former version" was a distribution kernel with patches? Either way this is a simple tunable in sysfs; and to be honest, going to the full speed is very often the right behavior so as a default it is quite sane... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org