From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Liguori Subject: Re: Gigabit networking speeds Date: Tue, 18 Sep 2007 14:22:30 -0500 Message-ID: <46F02576.3000903@us.ibm.com> References: <1190141820.12685.216.camel@ahr2> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Gerard Saraber Return-path: In-Reply-To: <1190141820.12685.216.camel@ahr2> 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 Gerard Saraber wrote: > Hi, > we were testing the network throughput with some simple wget tests, > grabbing a 112MB file off another machine, the host OS gets 46MB/sec > transferring that file, but the guest virtual ones only get 10-14MB/sec, > I'm using model=rtl8139 for the nic, and a tap via a bridge, This is unfortunately the expected results with the rtl8139 nic. Dor and Rusty's PV network driver should give you closer to your expected results. Dor posted a link pretty recently to it. It will probably be a little while before it's all ready for prime-time though. Regards, Anthony Liguori > I'm > wondering if I'm doing something wrong, is there another nic model I can > use to make it faster? or use a different method besides the network tap > +bridge thing? > I tested two guests pulling the same file at the same time, both got > ~10MB/sec, so it seems the host is up to it, but the guests are somehow > limited.. > I saw some patches for an "IOQ" driver, should I be using a different > kernel tree? > > I'm using kvm-40 and linux 2.6.23-rc6 > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/