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 10:22:30 -0400 Message-ID: <20091008142230.GA11674@phenom.dumpdata.com> References: <4AA942BC.6080404@goop.org> <20090911160319.GJ31123@reaktio.net> <4AB025E4.1000303@goop.org> <20091008135952.GA29004@phenom.dumpdata.com> 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 > > Did you change the build-id of Xen between the tests? Meaning did you > > check out a newer one between the releases? > > > > No. I did not change the changesets of xen between the tests. Good. > > > > > > What is your underlaying disk for your guest? > > > > I am not using a disk image file. I am using LVM2 logical volume for my Win > XP Home guest. Right. There were two other disks in the screenshots. Did either one of them contain the "virtualmachines" VG? > > > > Did you flush the cache before you ran the tests? > > echo 3 > /proc/sys/vm/drop_caches > > > > No I did not. I am not aware of this requirement. Please do. > > > > > > Are you using stub-domain or normal QEMU? > > > > I don't think I am using stub-domain. I should be using normal QEMU. You are not based on your guest configuration. .. snip .. > > 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. > > > > They are not averages. They are first runs. Do the numbers stay about the same on 2.6.31.1 if you run it a couple of times? (And flush the cache between each run, that is it)