Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751425AbWBZXhs (ORCPT ); Sun, 26 Feb 2006 18:37:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751424AbWBZXhs (ORCPT ); Sun, 26 Feb 2006 18:37:48 -0500 Received: from allen.werkleitz.de ([80.190.251.108]:35981 "EHLO allen.werkleitz.de") by vger.kernel.org with ESMTP id S1751425AbWBZXhr (ORCPT ); Sun, 26 Feb 2006 18:37:47 -0500 Date: Mon, 27 Feb 2006 00:37:45 +0100 From: Johannes Stezenbach To: Dominik Brodowski Cc: Adrian Bunk , Andi Kleen , Dave Jones , Dmitry Torokhov , davej@codemonkey.org.uk, Zwane Mwaikambo , Samuel Masham , Jan Engelhardt , linux-kernel@vger.kernel.org, Andrew Morton , cpufreq@lists.linux.org.uk Message-ID: <20060226233745.GA6804@linuxtv.org> Mail-Followup-To: Johannes Stezenbach , Dominik Brodowski , Adrian Bunk , Andi Kleen , Dave Jones , Dmitry Torokhov , davej@codemonkey.org.uk, Zwane Mwaikambo , Samuel Masham , Jan Engelhardt , linux-kernel@vger.kernel.org, Andrew Morton , cpufreq@lists.linux.org.uk References: <20060214152218.GI10701@stusta.de> <20060223204110.GE6213@redhat.com> <20060225015722.GC8132@linuxtv.org> <200602250527.03493.ak@suse.de> <20060225125326.GJ3674@stusta.de> <20060225132820.GA13413@isilmar.linta.de> <20060226203941.GA5783@linuxtv.org> <20060226205513.GA26486@isilmar.linta.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060226205513.GA26486@isilmar.linta.de> User-Agent: Mutt/1.5.11+cvs20060126 X-SA-Exim-Connect-IP: 84.189.241.246 Subject: Re: Status of X86_P4_CLOCKMOD? X-SA-Exim-Version: 4.2 (built Thu, 16 Feb 2006 12:49:04 +1100) X-SA-Exim-Scanned: Yes (on allen.werkleitz.de) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1479 Lines: 36 On Sun, Feb 26, 2006, Dominik Brodowski wrote: > On Sun, Feb 26, 2006 at 09:39:41PM +0100, Johannes Stezenbach wrote: > > > > Do you have the numbers for a Pentium(R) 4 HT? (I couldn't find > > anything substantial with google.) Especially C2 vs. C2 + throttling? > > Because the way I remember having read somewhere, the idle > > (C2) power consumption of the P4 is significantly higher > > than with the Pentium(R) M. > > Unfortunately, I do not have these numbers present. You can check the > processor specification sheets at Intel's website, though. Went to the Intel(R) website, searched for half an hour, found many docs but none that gives useful information about this, gave up. :-( > > > So: P4-clockmod style throttling only makes sense if either > > > > > > a) the idle handler does not enter the Stop-Grant state (C2) efficiently, or > > > > Maybe my previous mails were not clear enough: The goal is to > > reduce idle power consumption (and by that fan noise). The PC > > is running but is idle, e.g just listening for possible incoming > > jabber messages or whatever. > > Most probably, the idle handler can't make use of the Stop-Grant state (C2) > here, so this is case a) noted above. Hm. Thanks, Johannes - 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/