From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262216AbULMLUM (ORCPT ); Mon, 13 Dec 2004 06:20:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262225AbULMLUM (ORCPT ); Mon, 13 Dec 2004 06:20:12 -0500 Received: from linux2.isphuset.no ([213.236.237.186]:37092 "EHLO gtw.mailserveren.com") by vger.kernel.org with ESMTP id S262216AbULMLUF (ORCPT ); Mon, 13 Dec 2004 06:20:05 -0500 Subject: Re: dynamic-hz From: Hans Kristian Rosbach To: Andrew Morton Cc: Con Kolivas , andrea@suse.de, pavel@suse.cz, Linux Kernel Mailing List In-Reply-To: <20041213030237.5b6f6178.akpm@osdl.org> References: <20041211142317.GF16322@dualathlon.random> <20041212163547.GB6286@elf.ucw.cz> <20041212222312.GN16322@dualathlon.random> <41BCD5F3.80401@kolivas.org> <20041213030237.5b6f6178.akpm@osdl.org> Content-Type: text/plain Organization: ISPHuset Nordic AS Message-Id: <1102936790.17227.24.camel@linux.local> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Mon, 13 Dec 2004 12:19:50 +0100 Content-Transfer-Encoding: 7bit X-Declude-Sender: hk@isphuset.no [195.159.151.115] X-Note: This E-mail was scanned by Declude JunkMail (www.declude.com) for spam. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2004-12-13 at 12:02, Andrew Morton wrote: > Con Kolivas wrote: > > The performance benefit, if any, is often lost in noise during > > benchmarks and when there, is less than 1%. So I was wondering if you > > had some specific advantage in mind for this patch? Is there some > > arch-specific advantage? I can certainly envision disadvantages to lower Hz. > > There are apparently some laptops which exhibit appreciable latency between > the start of ACPI sleep and actually consuming less power. The 1ms wakeup > frequency will shorten battery life on these machines significantly. (I > forget the exact numbers - Len will know). Is there any recommended lower bound setting? Would there be a point in recommending lower settings for desktops running only text consoles opposed to X desktops? -HK