From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcus Granado Subject: Re: Performance of Xen VCPU Scheduling Date: Wed, 10 Jul 2013 15:46:01 +0100 Message-ID: <51DD73A9.5070408@citrix.com> References: <51DD5AF4.3080109@citrix.com> <1373462584.3051.83.camel@Solace> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1373462584.3051.83.camel@Solace> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Dario Faggioli Cc: George Dunlap , Matthew Portas , xen-devel List-Id: xen-devel@lists.xenproject.org On 10/07/13 14:23, Dario Faggioli wrote: > On mer, 2013-07-10 at 14:00 +0100, Marcus Granado wrote: >> >> While trying to understand why this increased performance is not present >> in the default non-pinned state and if it would be possible to obtain >> this extra performance in the default non-pinned dom0 configuration, >> Matthew Portas and I evaluated lots of Xen 4.2 parameters and patches: >> > > Just one point. This by any means make all this study/effort less > valuable (quite the contrary, actually), but, with George, we started to > discuss about bringing credit2 into a better shape and, at some point, > switch to it by default. It's unclear whether this could be done for > 4.4, but still... So, do you have any numbers about it already? Yes, I believe we have a couple of results for credit2, I'll put them on the page. > How hard > will it be to, at some point, perform the same measurements and analysis > with it? > Easy enough, all the measurements used automated tests to improve reproducibility. We would need a url with binaries or rpms as input, and the output is a set of graphs for analysis. cheers, Marcus