From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261712AbVGITRD (ORCPT ); Sat, 9 Jul 2005 15:17:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261706AbVGITRC (ORCPT ); Sat, 9 Jul 2005 15:17:02 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:16552 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S261712AbVGITQC (ORCPT ); Sat, 9 Jul 2005 15:16:02 -0400 Subject: Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt From: Lee Revell To: Andrew Morton Cc: arjan@infradead.org, azarah@nosferatu.za.org, cw@f00f.org, linux-kernel@vger.kernel.org, torvalds@osdl.org, christoph@lameter.org In-Reply-To: <20050709121212.7539a048.akpm@osdl.org> References: <200506231828.j5NISlCe020350@hera.kernel.org> <20050708214908.GA31225@taniwha.stupidest.org> <20050708145953.0b2d8030.akpm@osdl.org> <1120928891.17184.10.camel@lycan.lan> <1120932991.6488.64.camel@mindpipe> <1120933916.3176.57.camel@laptopd505.fenrus.org> <1120934163.6488.72.camel@mindpipe> <20050709121212.7539a048.akpm@osdl.org> Content-Type: text/plain Date: Sat, 09 Jul 2005 15:16:01 -0400 Message-Id: <1120936561.6488.84.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.2.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2005-07-09 at 12:12 -0700, Andrew Morton wrote: > Lee Revell wrote: > > > > > This is not a userspace visible thing really with few exceptions, and > > > well people can select the one they want, right? > > > > Then why not leave the default at 1000? > > Because some machines exhibit appreciable latency in entering low power > state via ACPI, and 1000Hz reduces their battery life. By about half, > iirc. > Then the owners of such machines can use HZ=250 and leave the default alone. Why should everyone have to bear the cost? Lee