From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 28 Jan 2001 09:19:50 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 28 Jan 2001 09:19:40 -0500 Received: from horus.its.uow.edu.au ([130.130.68.25]:49916 "EHLO horus.its.uow.edu.au") by vger.kernel.org with ESMTP id ; Sun, 28 Jan 2001 09:19:25 -0500 Message-ID: <3A742C27.4E179E83@uow.edu.au> Date: Mon, 29 Jan 2001 01:26:47 +1100 From: Andrew Morton X-Mailer: Mozilla 4.7 [en] (X11; I; Linux 2.4.0-test8 i586) X-Accept-Language: en MIME-Version: 1.0 To: Bill Huey CC: yodaiken@fsmlabs.com, Nigel Gamble , linux-kernel@vger.kernel.org, linux-audio-dev@ginette.musique.umontreal.ca Subject: Re: [linux-audio-dev] low-latency scheduling patch for 2.4.0 In-Reply-To: <200101220150.UAA29623@renoir.op.net> <20010128061428.A21416@hq.fsmlabs.com>, <20010128061428.A21416@hq.fsmlabs.com>; from yodaiken@fsmlabs.com on Sun, Jan 28, 2001 at 06:14:28AM -0700 <20010128060704.A2181@gnuppy.monkey.org> 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 Bill Huey wrote: > > Andrew Morton's patch uses < 10 rescheduling points (maybe less from memory) err... It grew. More like 50 now reiserfs is in there. That's counting real instances - it's not counting ones which are expanded multiple times as "1". It could be brought down to 20-25 with good results. It seems to have a 1/x distribution - double the reschedule count, halve the latency. We're currently doing 300-400 usecs. I think a 1.5-millisecond @ 500MHz kernel would be a good, maintainable solution and a sensible compromise. - - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/