From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Olney Subject: Re: XP installation speed: KVM vs Xen Date: Wed, 28 Feb 2007 12:10:08 -0600 Message-ID: <1172686208.5261.52.camel@localhost.localdomain> References: <1172609205.6539.9.camel@localhost.localdomain> <45E52AEE.6030107@qumranet.com> <1172679377.5261.38.camel@localhost.localdomain> <45E5B07A.3040700@qumranet.com> Reply-To: aolney-lg4TTeReta+Vc3sceRu5cw@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Avi Kivity Return-path: In-Reply-To: <45E5B07A.3040700-atKUWr5tajBWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org The Xen installed image is "Standard PC". I erased the KVM installed image unfortunately, so I can't check that easily. The KVM installed image did require the -no-acpi flag, and the Xen image does not, so that is consistent with your explanation: the Xen install is a faster, non-acpi HAL. The speed difference is quite noticeable on a core 2 1.66 On Wed, 2007-02-28 at 18:40 +0200, Avi Kivity wrote: > Andrew Olney wrote: > > I'd almost swear that KVM is faster with an XP raw image that was > > installed by Xen, than it is with a raw image installed by KVM. > > > > > > That may well be. Perhaps the images have different HALs. > > Compare the values under My Computer | Properties | Hardware | Device > Manager | Computer. Maybe one uses the "Standard PC" HAL (faster) > and > the other the ACPI HAL (slower). You can also change HALs (required > reboot). > > > > On Wed, 2007-02-28 at 09:10 +0200, Avi Kivity wrote: > > > >> Andrew Olney wrote: > >> > >>> I've been migrating from Xen to KVM for a wide variety of reasons. > >>> > >>> I've noticed, however, that XP installs much much faster with Xen > (3.03 > >>> xen-image-xen0-2.6.17-6-generic-xen0 ubuntu) than with KVM (14). > >>> > >>> > >> btw, as both Xen and kvm use qemu, Xen full virtualization images > should > >> work without change in kvm. > >> > >> > >> > >> > > > > > > > -- > error compiling committee.c: too many arguments to function > > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV