From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030790AbXCNJ2N (ORCPT ); Wed, 14 Mar 2007 05:28:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030799AbXCNJ2N (ORCPT ); Wed, 14 Mar 2007 05:28:13 -0400 Received: from mail18.syd.optusnet.com.au ([211.29.132.199]:47854 "EHLO mail18.syd.optusnet.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030790AbXCNJ2M (ORCPT ); Wed, 14 Mar 2007 05:28:12 -0400 From: Con Kolivas To: Mike Galbraith Subject: Re: [PATCH] [RSDL-0.30] sched: rsdl improve latencies with differential nice Date: Wed, 14 Mar 2007 20:25:58 +1100 User-Agent: KMail/1.9.5 Cc: Al Boldi , Andrew Morton , Ingo Molnar , ck list , linux-kernel@vger.kernel.org References: <200703042335.26785.a1426z@gawab.com> <200703140231.28314.kernel@kolivas.org> <1173863615.7822.86.camel@Homer.simpson.net> In-Reply-To: <1173863615.7822.86.camel@Homer.simpson.net> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200703142026.05016.kernel@kolivas.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 14 March 2007 20:13, Mike Galbraith wrote: > On Wed, 2007-03-14 at 02:31 +1100, Con Kolivas wrote: > > Can you try the attached patch please Al and Mike? It "dithers" the > > priority bitmap which tends to fluctuate the latency a lot more but in a > > cyclical fashion. This tends to make the max latency bound to a smaller > > value and should make it possible to run -nice tasks without killing the > > latency of the non niced tasks. Eg you could possibly run X nice -10 at a > > guess like we used to in 2.4 days. It's not essential of course, but is a > > workaround for Mike's testcase. > > Oh my. I thought I was all done staring mindlessly at gforce (chinese > water torture). Oh well, a few more brain cells dying of boredom won't > kill me I guess ;-) Will give it a shot. No don't. It's buggy and you missed the warning. Boy were you lucky I was looking right now. -- -ck