From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [Xen-devel] RE: How to: Improve Network Throughput of a XEN kernel? Date: Wed, 03 Mar 2010 08:21:12 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-users-bounces@lists.xensource.com Errors-To: xen-users-bounces@lists.xensource.com To: Mike Viau , "bderzhavets@yahoo.com" Cc: "xen-devel@lists.xensource.com" , "xen-users@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org On 03/03/2010 00:50, "Mike Viau" wrote: > The openSUSE distribution supported Xen 3.4.1 tools, and had a 2.6.31.12 > xenified kernel. On this setup I experience identical network performance. > > ~1MB/s - w/ xen kernel > ~4.5 MB/s - w/ non-xen kernel How/what are you measuring? Both those numbers are crap for a gigabit NIC. They're poor even for Fast Ethernet. Huge performance differences between dom0 and native are unusual. But normally you can max the card in both cases, with CPU headroom to spare. -- Keir > I use the e1000e kernel module driver for my Ethernet card. > > Is this typical Dom0 (or Xen Host) network performance with a xenified kernel > or is just in my two setups that one encounters such a network performance hit > to the Dom0?