From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Becker Subject: Re: Xen cluster n/w performance (again!) Date: Tue, 30 Nov 2004 16:09:43 -0500 Message-ID: <20041130210943.GV1102@cs.duke.edu> References: <1b0b4557041123133226ff88@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: Sender: xen-devel-admin@lists.sourceforge.net Errors-To: xen-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , List-Archive: To: Ian Pratt Cc: Keir Fraser , xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org " Is anyone else still seeing network performance anomalies? I still cannot get over 500Mbps into xenU with any hardware that I have. This holds using kernels I build, or using kernel binaries from the 2.0.1 tarball. I tried tuning a e1000 driver, which greatly reduced the interrupt count, but had no effect on bandwidth. I can get 600 to 750 Mbps into domain-0 from a stock linux host. That rate then drops to around 500 after starting the etherbridge. Running top on Domain-0 claims the domain is over 60% idle. This is with e1000 and bcm5703 NICs on IBM x335, Dell 1650 and other platforms, and a variety of CPU clock speeds. Running iperf under stock linux 2.4.25 gets 940Mbps between any of them. ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/