From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xensource.com>
Subject: Re: Xen + Win2k3 HVM - Slow network
Date: Tue, 28 Nov 2006 09:22:49 +0000
Message-ID: <C191B069.4E63%keir@xensource.com>
References: <456BF552.4000607@swisscenter.com>
Mime-Version: 1.0
Content-Type: text/plain;
	charset="ISO-8859-1"
Content-Transfer-Encoding: quoted-printable
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <456BF552.4000607@swisscenter.com>
List-Unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: S=?ISO-8859-1?B?6Q==?=bastien RICCIO <sr@swisscenter.com>, xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org




On 28/11/06 8:37 am, "S=E9bastien RICCIO" <sr@swisscenter.com> wrote:

> While doing some network throughput tests, I noticed that the para
> virtualised guests gets up to 11MB/s transfers rate but the Windows
> 2003 Server gets only 1.3MB/s on the same file (downloaded from LAN).
>=20
> Dom0 - CentOS 4.4 64bit
> DomUs - CentOS 4.4 64bit
> HVM guests - Win 2003 server 32bit (pcnet driver)
>=20
> Any clues what could be the problem ?

The HVM guest is emulating a rtl8139 network card rather than using a
high-performance paravirtualised frontend network driver.

 -- Keir