From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: Video Presentation on PCI Express x16 VGA Pass Through to Xen-based Windows XP Home Edition HVM Virtual Machine Date: Thu, 8 Oct 2009 09:59:52 -0400 Message-ID: <20091008135952.GA29004@phenom.dumpdata.com> References: <20090910140359.GB31123@reaktio.net> <4AA942BC.6080404@goop.org> <20090911160319.GJ31123@reaktio.net> <4AB025E4.1000303@goop.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "Mr. Teo En Ming (Zhang Enming)" Cc: Jeremy Fitzhardinge , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Thu, Oct 08, 2009 at 09:48:20PM +0800, Mr. Teo En Ming (Zhang Enming) wrote: > Attached in this email are three JPEG screenshots showing disk I/O benchmark > results for pvops dom0 kernels 2.6.30-rc3, 2.6.31-rc6, and 2.6.31.1. Did you change the build-id of Xen between the tests? Meaning did you check out a newer one between the releases? What is your underlaying disk for your guest? Did you flush the cache before you ran the tests? echo 3 > /proc/sys/vm/drop_caches Are you using stub-domain or normal QEMU? What is the xm entry for the disk in your .xm. Are you using GPLV/Novell VMDK/etc accelerated drivers under Windows? How many iterations of the disk I/O benchmark did you run? As in, are those screenshots of the first run, or the average over a couple of them.