From mboxrd@z Thu Jan 1 00:00:00 1970 From: Victor Abeytua Garcia Subject: Re: virtual machines network goes 100Mbit when interface is Gbit Date: Thu, 27 Mar 2008 11:58:16 +0100 Message-ID: <47EB7DC8.5010804@Nosys.es> References: <47DA819D.3050907@Nosys.net> <47DA9839.7080607@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Cc: lista kvm-devel , Miguel Araujo To: Haydn Solomon Return-path: In-Reply-To: <47DA9839.7080607@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org Hello, I'm not sure if I understand you. Do you mean that the physical network cards should be e1000 or that the virtual machines must somehow emulate e1000 network cards? As I understand Miguel's post, he is finding an issue with the bridge's speed (two virtual machines running on the same physical machine are limited to 100 Mbps between themselves). Best regards, V=EDctor Haydn Solomon escribi=F3: > What emulated nic are you using? I think only the e1000 emulated nic = > supports 1 GB. > > Miguel Araujo wrote: > = >> Hello all, >> >> I'm testing the last kvm version, 62. I was doing an iperf benchmark to = >> test the network performance in a Feisty virtual machine and I got = >> values surround 100Mbits when my card is actually 1Gbit. The testing = >> environment is conformed by 2 machines, both with Gbit interfaces. The = >> vm in kvm is running in server mode, the other (not virtualized one) is = >> the client. The vm interface is going to a bridge called br0. Ethtool = >> says the interface is running 100Mbits but it doesn't let me change the = >> speed or any other parameter in the vm. >> >> I can't either change tap0 parameters in kvm host. =BFIs anyone having t= he = >> same issue?=BFam I forgetting something? >> >> Thanks for your time in advanced, >> Miguel >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by: Microsoft >> Defy all challenges. Microsoft(R) Visual Studio 2008. >> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ >> _______________________________________________ >> kvm-devel mailing list >> kvm-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/kvm-devel >> = >> = > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > kvm-devel mailing list > kvm-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kvm-devel > = -- = V=EDctor Abeytua Garc=EDa ----------- Socio Consultor Nosys AJjV S.L. Networked Open SYStems Tecnolog=EDas de la Informaci=F3n - Seguridad C/ Isla Graciosa 2, Loft 18 28700 San Sebasti=E1n de los Reyes Madrid (Spain) ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace