From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rolf Neugebauer Subject: Re: Xen cpu usage limting Date: Fri, 16 Apr 2004 17:54:08 +0100 Sender: xen-devel-admin@lists.sourceforge.net Message-ID: <1082134448.13745.46.camel@wyvis> References: <41749.216.166.50.35.1082133605.squirrel@216.166.50.35> Reply-To: rolf.neugebauer@intel.com Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <41749.216.166.50.35.1082133605.squirrel@216.166.50.35> Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Brian Wolfe Cc: rolf.neugebauer@intel.com, xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org Hi Brian, which version of Xen/Xenolinux are you using? the scheduler implementation changed from 1.2 to 1.3-unstable. On Fri, 2004-04-16 at 17:40, Brian Wolfe wrote: > Is it possible? How? (looked for documentation, but I didn't see any.) > I did see xen_cpuperf, but I can't get any real information from there > either. 8-( > > I have 8 domains (including domain-0) runing on the server. If one goes to > 100% cpu time, the system bogs. I'd like to be able to ensure that each > instance can't keep the rest from runing... This should definitely not happen!!! Could you provide a little more detail on what is running in the different domains? In 1.2 the scheduler is a weighted proportional share scheduler (BVT) and by default all domains get the same weight and therefore should get the same share. in 1.3 you have a boot-time choice between schedulers, BVT (same as in 1.2, Atropos (a soft real time scheduler based on EDF) I have just tested with 1.3-unstable, four domains on a dual processor machine (two domains per CPU) and BVT as the scheduler and they happily share the CPU 50/50 if both run the equivalent of a while(1) loop. Rolf ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click