Hi, I am actually testing Xen (Unstable repository) with para-virtualised CentOS guests and HVM guests (windows 2003 server). 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). Dom0 - CentOS 4.4 64bit DomUs - CentOS 4.4 64bit HVM guests - Win 2003 server 32bit (pcnet driver) Any clues what could be the problem ? Thanks a lot for your answers. Best regards, -- Sébastien Riccio SwissCenter / OpenBusiness SA sr@openbusiness.com ________________________________________________ OpenBusiness S.A. World Trade Center Av Gratta-Paille 1-2 Tel: +41 21 641 1010 CH-1000 Lausanne 30 FAX: +41 21 641 1011 Switzerland www.openbusiness.ch __________________________________________________________________________ Disclaimer This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of the OpenBusiness Group. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copy-ing of this email is strictly prohibited. If you have received this email in error please notify the OpenBusiness help-desk by telephone on +41 21 641 10 10. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On 28/11/06 8:37 am, "Sébastien 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). > > Dom0 - CentOS 4.4 64bit > DomUs - CentOS 4.4 64bit > HVM guests - Win 2003 server 32bit (pcnet driver) > > 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 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Keir Fraser a écrit :> The HVM guest is emulating a rtl8139 network card rather than using a > high-performance paravirtualised frontend network driver. > > -- Keir > > > >Hi, Thank you for your answer. So that means that actually there is no way to tweak this to get a better throughput ? Is a frontend driver planned ? Best regards, -- Sébastien Riccio SwissCenter / OpenBusiness SA sr@openbusiness.com ________________________________________________ OpenBusiness S.A. World Trade Center Av Gratta-Paille 1-2 Tel: +41 21 641 1010 CH-1000 Lausanne 30 FAX: +41 21 641 1011 Switzerland www.openbusiness.ch __________________________________________________________________________ Disclaimer This email is confidential and intended solely for the use of the individual to whom it is addressed. Any views or opinions presented are solely those of the author and do not necessarily represent those of the OpenBusiness Group. If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copy-ing of this email is strictly prohibited. If you have received this email in error please notify the OpenBusiness help-desk by telephone on +41 21 641 10 10. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On Tue, Nov 28, 2006 at 10:29:11AM +0100, Sébastien RICCIO wrote:> Keir Fraser a écrit : > >The HVM guest is emulating a rtl8139 network card rather than using a > >high-performance paravirtualised frontend network driver. > > > > -- Keir > > > > > > > > > > Hi, > > Thank you for your answer. > > So that means that actually there is no way to tweak this to get a > better throughput ? > Is a frontend driver planned ? >Xensource and VirtualIron already have PV drivers for Windows, but they are not freely available nor opensource :( I wish those would be released to the public.. -- Pasi> Best regards, > > -- > Sébastien Riccio > SwissCenter / OpenBusiness SA > sr@openbusiness.com > ________________________________________________ > > OpenBusiness S.A. > World Trade Center > Av Gratta-Paille 1-2 Tel: +41 21 641 1010 > CH-1000 Lausanne 30 FAX: +41 21 641 1011 > Switzerland www.openbusiness.ch > __________________________________________________________________________ > Disclaimer > > This email is confidential and intended solely for the use of the > individual to whom it is addressed. Any views or opinions presented are > solely those of the author and do not necessarily represent those of the > OpenBusiness Group. > If you are not the intended recipient, be advised that you have received > this email in error and that any use, dissemination, forwarding, > printing, or copy-ing of this email is strictly prohibited. > > If you have received this email in error please notify the OpenBusiness > help-desk by telephone on +41 21 641 10 10. >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel