From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264002AbUGYQyu (ORCPT ); Sun, 25 Jul 2004 12:54:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264238AbUGYQyu (ORCPT ); Sun, 25 Jul 2004 12:54:50 -0400 Received: from wingding.demon.nl ([82.161.27.36]:50819 "EHLO wingding.demon.nl") by vger.kernel.org with ESMTP id S264002AbUGYQyt (ORCPT ); Sun, 25 Jul 2004 12:54:49 -0400 Date: Sun, 25 Jul 2004 18:54:47 +0200 From: Rutger Nijlunsing To: Riccardo Vestrini Cc: linux-kernel@vger.kernel.org Subject: Re: is it really better speedstep-ich vs. p4-clockmod cpufreq driver? Message-ID: <20040725165447.GA16349@nospam.com> Reply-To: linux-kernel@tux.tmfweb.nl References: <41015EEF.3070602@sssup.it> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41015EEF.3070602@sssup.it> Organization: M38c User-Agent: Mutt/1.5.6i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jul 23, 2004 at 08:54:39PM +0200, Riccardo Vestrini wrote: > it seems that speedstep-ich and acpi cpufreq driver have only two usable > clock frequencies, while p4-clockmod has eight > my cpu is: Intel Mobile Intel(R) Pentium(R) 4 CPU 3.06GHz stepping 09 > [snip] > > i do not know what driver is supposed to be better and why speedstep-ich > driver has only two frequencies p4-clockmod is not really a cpufreq driver: it does not change the frequency. The only function is to have 'idle-cycles' to cool down the processor during intensive CPU programs: this is what the processor does when it gets too hot. The speedstep driver _does_ change the frequency (and/or voltage) and gives other advantages like less power consumption. So use speedstep. -- Rutger Nijlunsing ---------------------------- rutger ed tux tmfweb nl never attribute to a conspiracy which can be explained by incompetence ----------------------------------------------------------------------