From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262320AbVGLTik (ORCPT ); Tue, 12 Jul 2005 15:38:40 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262314AbVGLTbV (ORCPT ); Tue, 12 Jul 2005 15:31:21 -0400 Received: from viper.oldcity.dca.net ([216.158.38.4]:30627 "HELO viper.oldcity.dca.net") by vger.kernel.org with SMTP id S262327AbVGLTah (ORCPT ); Tue, 12 Jul 2005 15:30:37 -0400 Subject: Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt From: Lee Revell To: "Martin J. Bligh" Cc: Chris Friesen , 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: <15890000.1121180902@[10.10.2.4]> 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> <1121128260.2632.12.camel@mindpipe> <165840000.1121141256@[10.10.2.4]> <1121141602.2632.31.camel@mindpipe> <188690000.1121142633@[10.10.2.4]> <1121178300.2632.51.camel@mindpipe> <14170000.1121180207@[10.10.2.4]> <1121180403.2632.59.camel@mindpipe> <15890000.1121180902@[10.10.2.4]> Content-Type: text/plain Date: Tue, 12 Jul 2005 15:30:33 -0400 Message-Id: <1121196633.10580.5.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 Tue, 2005-07-12 at 08:08 -0700, Martin J. Bligh wrote: > Well, looking forward, you'll have sub-HZ timers, so none of this will > matter. Actually, looking at the above, 150 seems perfectly reasonable > to me, but 300 seems to be close enough. I'll run some numbers on > both. > > From your above email, I'm more convinced than ever that lowering HZ > is the right thing to do ... Another example is sending MIDI clock. This is not possible at HZ=100 as the jitter is too much for external devices to lock on to. Lee