From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261329AbVGVRP3 (ORCPT ); Fri, 22 Jul 2005 13:15:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262119AbVGVRP3 (ORCPT ); Fri, 22 Jul 2005 13:15:29 -0400 Received: from pne-smtpout1-sn2.hy.skanova.net ([81.228.8.83]:51417 "EHLO pne-smtpout1-sn2.hy.skanova.net") by vger.kernel.org with ESMTP id S261329AbVGVRP1 (ORCPT ); Fri, 22 Jul 2005 13:15:27 -0400 Date: Fri, 22 Jul 2005 19:15:10 +0200 From: Voluspa To: Pavel Machek Cc: jesper.juhl@gmail.com, lista1@telia.com, linux-kernel@vger.kernel.org Subject: Re: 2.6.13-rc3 Battery times at 100/250/1000 Hz = Zero difference Message-Id: <20050722191510.5e120515.voluspa@telia.com> In-Reply-To: <20050722144855.GA2036@elf.ucw.cz> References: <20050721200448.5c4a2ea0.lista1@telia.com> <9a8748490507211114227720b0@mail.gmail.com> <20050722144855.GA2036@elf.ucw.cz> X-Mailer: Sylpheed version 1.0.4 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 22 Jul 2005 16:48:55 +0200 Pavel Machek wrote: [...] .......Jesper Juhl wrote > > Ok, so with an idle machine, different HZ makes no noticeable > > difference, but I'd suspect things would be different if the machine > > was actually doing some work. > > Would be more interresting to see how long it lasts with a light > > load and with a heavy load. > > No, I do not think so. Biggest difference should be on completely idle > machine where ACPI can utilize low power states. > > Can you check that C3 is utilized? Unloading usb modules may be > neccessary... I've been reading/checking up on this the last four hours since I had a nagging suspicion that the CPU indeed didn't enter a sleep state. With all the abbreviations in the ACPI field (S1, C1, P1 etc) it killed a fair amount of brain cells, but I'd still call faul on this: from /var/log/kernel [powernow-k8 module loads processor module which says] ACPI: CPU0 (power states: C1[C1]) and catting /proc/acpi/processor/CPU0/power gives active state: C1 max_cstate: C8 bus master activity: 00000000 states: *C1: type[C1] promotion[--] demotion[--] latency[000] usage[02998796] /sys/module/processor/parameters/max_cstate says 8 /sys/module/processor/parameters/bm_history says 4294967295 So I'm a bit baffled that no C2/C3 turns up. I've done a test-compile with all of ACPI in kernel instead of as modules, but there was no difference. I'll unload the whole USB-module part and boot without loading them, but will it matter? Please provide more details about how to debug this (very confusing) field. Mvh Mats Johannesson --