From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Hansen Subject: Re: kvm-27 vs 28 I/O speed Date: Wed, 11 Jul 2007 11:54:52 -0700 Message-ID: <1184180092.26210.49.camel@localhost> References: <1183748857.10287.198.camel@localhost> <46909CFD.9050806@qumranet.com> <1184013180.10287.278.camel@localhost> <46931CC9.8060106@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel To: Avi Kivity Return-path: In-Reply-To: <46931CC9.8060106-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 On Tue, 2007-07-10 at 08:44 +0300, Avi Kivity wrote: > What does 'top' on the host show in both cases? On the fast one (kvm-27) I just see the dd as a flash in top. It doesn't stay for long. The VM isn't very responsive during the dd. On the slow (kvm-28) one, I see the dd in top creeping along, using ~2% of the CPU. The guest is responsive during this time > There was a change in kvm userspace that affected IDE. Can you try > kvm-27 userspace with a kvm-28 kernel module? That's actually what I've been doing the whole time. Sorry, my initial problem description must not have been very clear. I've been using the kvm-28 modules the entire time, and only varying the userspace. The IDE changes do look suspect. -- Dave ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/