From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261499AbVHBLYb (ORCPT ); Tue, 2 Aug 2005 07:24:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261502AbVHBLYQ (ORCPT ); Tue, 2 Aug 2005 07:24:16 -0400 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:59114 "EHLO amd.ucw.cz") by vger.kernel.org with ESMTP id S261499AbVHBLXT (ORCPT ); Tue, 2 Aug 2005 07:23:19 -0400 Date: Tue, 2 Aug 2005 13:23:04 +0200 From: Pavel Machek To: James Bruce Cc: David Weinehall , Lee Revell , Marc Ballarin , linux-kernel@vger.kernel.org Subject: Re: Power consumption HZ100, HZ250, HZ1000: new numbers Message-ID: <20050802112304.GA1308@elf.ucw.cz> References: <20050730195116.GB9188@elf.ucw.cz> <1122753864.14769.18.camel@mindpipe> <20050730201049.GE2093@elf.ucw.cz> <42ED32D3.9070208@andrew.cmu.edu> <20050731211020.GB27433@elf.ucw.cz> <42ED4CCF.6020803@andrew.cmu.edu> <20050731224752.GC27580@elf.ucw.cz> <1122852234.13000.27.camel@mindpipe> <20050801074447.GJ9841@khan.acc.umu.se> <42EE4B4A.80602@andrew.cmu.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42EE4B4A.80602@andrew.cmu.edu> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > >Any argument along the lines of the change of a default > >value in the defconfig screwing people over equally applies the other > >way around; by not changing the defconfig, you're screwing laptop users > >(and others that want less power consumption) over. The world is not > >black and white, it's a very boring gray (or a very sadening bloody > >red; but I hope we won't come to that point just because of a silly > >argument on lkml...) > > The tradeoff is a realistic 4.4% power savings vs a 300% increase in the > minimum sleep period. A user will see zero power savings if they have a > USB mouse (probably 99% of desktops). On top of that, we can throw in > Con's disturbing AV benchmark results (1). As a result, some of us > don't think 250HZ is a great tradeoff to make > _for_the_default_value_. As I said, I do not care about default value. And you should not care, too, since distros are likely to pick their own defaults. > From what I can tell, tick skipping works fine right now, it just needs > some cleanup. Thus I'd expect something like it will get integrated > into 2.6.14. If it gets in, the default HZ should go back up to 1000. > In that case why decrease it for exactly one patchlevel? I am afraid that CONFIG_NO_IDLE_HZ will be ready for 2.6.14... Pavel -- teflon -- maybe it is a trademark, but it should not be.