Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754250AbYHKOMf (ORCPT ); Mon, 11 Aug 2008 10:12:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752411AbYHKOMO (ORCPT ); Mon, 11 Aug 2008 10:12:14 -0400 Received: from casper.infradead.org ([85.118.1.10]:42935 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751748AbYHKOMN (ORCPT ); Mon, 11 Aug 2008 10:12:13 -0400 Date: Mon, 11 Aug 2008 07:12:09 -0700 From: Arjan van de Ven To: Matthew Garrett Cc: Adrian Bunk , S K , Zhao Yakui , Thomas Renninger , Alan Jenkins , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Subject: Re: cpufreq doesn't seem to work in Intel Q9300 Message-ID: <20080811071209.189b68c5@infradead.org> In-Reply-To: <20080811140734.GA27959@srcf.ucam.org> References: <514e099a0808030300u140a0ae7m92a2e7294f39f7b7@mail.gmail.com> <200808081430.43012.trenn@suse.de> <200808092059.47863.trenn@suse.de> <514e099a0808100128u303207clcb22292db2f0cc59@mail.gmail.com> <1218418431.6671.52.camel@yakui_zhao.sh.intel.com> <514e099a0808102144n241c8e9ak255bded0a80744f1@mail.gmail.com> <20080811042244.469f8e1d@infradead.org> <20080811140206.GB3338@cs181140183.pp.htv.fi> <20080811140734.GA27959@srcf.ucam.org> Organization: Intel X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.11; 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: 1089 Lines: 32 On Mon, 11 Aug 2008 15:07:34 +0100 Matthew Garrett wrote: > On Mon, Aug 11, 2008 at 05:02:06PM +0300, Adrian Bunk wrote: > > > This statement is only true for HPC environments and when you > > measure Watts per work done. > > > > But if you have some desktop or server with a load that is > > determined by when it gets used, then p4-clockmod can actually save > > energy when the computer is not under high load or even idle. > > > > Or do I miss anything? > > On modern hardware, the C states will win you more than downclocking > the processor would. > actually.. p4_clockmod is *NOT* downclocking the processor.. that's the whole problem with it.. -- 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/