From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262472AbVF2IHg (ORCPT ); Wed, 29 Jun 2005 04:07:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262481AbVF2IHg (ORCPT ); Wed, 29 Jun 2005 04:07:36 -0400 Received: from isilmar.linta.de ([213.239.214.66]:21485 "EHLO linta.de") by vger.kernel.org with ESMTP id S262472AbVF2IH2 (ORCPT ); Wed, 29 Jun 2005 04:07:28 -0400 Date: Wed, 29 Jun 2005 10:07:26 +0200 From: Dominik Brodowski To: Erik Slagter Cc: linux-kernel@vger.kernel.org, Jim serio , Andrew Haninger Subject: Re: C2/C3 on SMP [Was: Re: 2.6.X not recognizing second CPU] Message-ID: <20050629080726.GA14930@isilmar.linta.de> Mail-Followup-To: Dominik Brodowski , Erik Slagter , linux-kernel@vger.kernel.org, Jim serio , Andrew Haninger References: <3642108305062711524e1e163@mail.gmail.com> <105c793f050627123583a70d0@mail.gmail.com> <3642108305062713487326b672@mail.gmail.com> <105c793f05062714022ad4359@mail.gmail.com> <20050627214249.GA29657@isilmar.linta.de> <1119958379.3969.9.camel@localhost.localdomain> <20050628212905.GA31610@isilmar.linta.de> <1120030846.7429.32.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1120030846.7429.32.camel@localhost.localdomain> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 29, 2005 at 09:40:45AM +0200, Erik Slagter wrote: > On Tue, 2005-06-28 at 23:29 +0200, Dominik Brodowski wrote: > > On Tue, Jun 28, 2005 at 01:32:59PM +0200, Erik Slagter wrote: > > > On Mon, 2005-06-27 at 23:42 +0200, Dominik Brodowski wrote: > > > > a) Power Management is available on SMP, though support for it is a bit less > > > > wide-spread than it is for UP > > > > > > Still no C2/C3 handling :-( > > > > Uh, wasn't there a small, nice patch implementing this in bk-acpi a few > > weeks ago? > > *clicketyclick* Oh yes, > > http://bugzilla.kernel.org/show_bug.cgi?id=4401 > > states it was merged into bk-acpi-test on 2005-04-22. However, I can't find > > it in current -mm any more... > > You're probably talking about the amd768 module. No, I'm not. I'm talking about plain ACPI C-States. > I could use it, but I > never got it working correctly, there is no actual power reduction. It > may have to do with the fast (1000 Hz) 2.6 clock though, making it sleep > in C2/C3 for only very short intervals. Also the selection for idle > CPU's seems to be too simple. The ACPI C-State selection algorithm needs a major overhaul, that's true. Dominik