From mboxrd@z Thu Jan 1 00:00:00 1970 From: George Dunlap Subject: Re: Problem Xen 4.0-amd64 + Heartbeat 3.0.3-2 with Debian Squeeze Date: Wed, 1 Jun 2011 10:21:08 +0100 Message-ID: References: <56480.201.34.53.103.1306542323.squirrel@mail.agrovale.com.br> <1306577527.23577.22.camel@dagon.hellion.org.uk> <57342.200.101.20.122.1306617709.squirrel@mail.agrovale.com.br> <1306830624.775.108.camel@zakaz.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Return-path: In-Reply-To: <1306830624.775.108.camel@zakaz.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Ian Campbell Cc: "xen-devel@lists.xensource.com" , "gilmarlinux@agrovale.com.br" List-Id: xen-devel@lists.xenproject.org On Tue, May 31, 2011 at 9:30 AM, Ian Campbell wrote: > IIRC these sorts of latency sensitive workloads are somewhere that the > existing credit scheduler doesn't do so well and is something which > George is looking to address with credit2. His canonical workload of > this type is audio playback but I suppose heartbeat falls into the same > broad class. So it might also be worth trying the credit2 scheduler. It is quite possible to get 50-100ms delays in scheduling with credit1 if the system is fairly busy. What kind of results does xentop report? You might consider moving to 4.1 and testing the credit2 scheduler. -George