From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262325AbVGLAdj (ORCPT ); Mon, 11 Jul 2005 20:33:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262312AbVGLAb1 (ORCPT ); Mon, 11 Jul 2005 20:31:27 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:31697 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S262293AbVGLAbE (ORCPT ); Mon, 11 Jul 2005 20:31:04 -0400 Subject: Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt From: Lee Revell To: Chris Friesen Cc: "Martin J. Bligh" , Diego Calleja , azarah@nosferatu.za.org, akpm@osdl.org, cw@f00f.org, linux-kernel@vger.kernel.org, torvalds@osdl.org, christoph@lameter.org In-Reply-To: <42D2D912.3090505@nortel.com> 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> <20050709203920.394e970d.diegocg@gmail.com> <1120934466.6488.77.camel@mindpipe> <176640000.1121107087@flay> <1121113532.2383.6.camel@mindpipe> <42D2D912.3090505@nortel.com> Content-Type: text/plain Date: Mon, 11 Jul 2005 20:30:59 -0400 Message-Id: <1121128260.2632.12.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 Mon, 2005-07-11 at 14:39 -0600, Chris Friesen wrote: > Lee Revell wrote: > > > Tickless + sub HZ timers is a win for everyone, the multimedia people > > get better latency, and the laptop people get to run longer. > > IIRC it's not a win for many systems. Throughput goes down due to timer > manipulation overhead. Makes sense. Anyway, this whole thread has been pretty hand wavey, I propose that until we see some numbers from the HZ=250 advocates, we leave the default alone. Lee