From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jacob Gorm Hansen Subject: Re: Report on Virtualization in Clusters Date: Fri, 26 Nov 2004 11:44:03 +0100 Message-ID: <41A708F3.3020803@diku.dk> References: <20041125125424.GO18329@idi.ntnu.no> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20041125125424.GO18329@idi.ntnu.no> 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: =?ISO-8859-1?Q?H=E5vard_Bjerke?= , runejoha@idi.ntnu.no Cc: xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org Håvard Bjerke wrote: > Rune and I just finished writing a report on using virtualization with Xen in clusters, with focus on network performance. You may download it from http://www.idi.ntnu.no/~havarbj/clust_virt.pdf > > We hope you find it interesting! Yes, very interesting. Good work. It seems from your tests without interrupt coalescing that Xen has a higher interrupt-handling overhead than native Linux. I suppose that with the new IO model, Xen needs to flush the TLBs for every interrupt that arrives. Do you think this is the reason for the overhead, or are the performance problems only due to your hardware being badly supported by Xen? Jacob ------------------------------------------------------- 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/