From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Cure <kvm@cure.nom.fr>
Subject: performance trouble
Date: Mon, 23 Jan 2012 09:28:37 +0100
Message-ID: <20120123082837.GC26955@nfs-rbx.ovh.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
To: kvm@vger.kernel.org
Return-path: <kvm-owner@vger.kernel.org>
Received: from gandalf.cure.nom.fr ([91.121.137.146]:33588 "EHLO
	gandalf.cure.nom.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1750695Ab2AWIeg (ORCPT <rfc822;kvm@vger.kernel.org>);
	Mon, 23 Jan 2012 03:34:36 -0500
Received: from gandalf.cure.nom.fr (localhost.localdomain [127.0.0.1])
	by gandalf.cure.nom.fr (8.14.3/8.14.3/Debian-5+lenny1) with ESMTP id q0N8SbPn025378
	for <kvm@vger.kernel.org>; Mon, 23 Jan 2012 09:28:37 +0100
Received: (from david@localhost)
	by gandalf.cure.nom.fr (8.14.3/8.14.3/Submit) id q0N8Sbs3025377
	for kvm@vger.kernel.org; Mon, 23 Jan 2012 09:28:37 +0100
Content-Disposition: inline
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>


		Hello,

	I use several kvm box, and no problem at all except for 1
application that have bad response time.

	The VM runs Windows 2008R2 and the application is an
client-server app develop with progress software and talk to an Oracle
databasei (on another server) and we access this app with RDS/TSE.
	The physical server runs Debian testing to have qemu-kvm 1.0 and
linux kernel 3.1 and libvirt 0.9.8. We use virtio for disk and network
and use the last driver for Windows (from RH).

	We have 2 references servers : one physical and one running
Vmware.

	Response time :
	o physical = 7s
	o VM under vmware = 8s
	o VM under KVM = 12s (to complete with qemu-kvm 0.12.5 and
kernel 2.6.32 we have 22s ...).

	I attach the libvirt xml of my vm.

	How can I see what's append ? Do you have idea to increase
performance ?

	David.