From mboxrd@z Thu Jan 1 00:00:00 1970 From: Håvard Bjerke Subject: Re: Report on Virtualization in Clusters Date: Fri, 26 Nov 2004 17:08:12 +0100 Message-ID: <20041126160812.GS18329@idi.ntnu.no> References: <20041125125424.GO18329@idi.ntnu.no> <41A708F3.3020803@diku.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=unknown-8bit Content-Transfer-Encoding: quoted-printable 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: Rune Johan Andresen Cc: Jacob Gorm Hansen , xen-devel@lists.sourceforge.net List-Id: xen-devel@lists.xenproject.org Please note that the application benchmarking was performed with IC enabl= ed. The application benchmarking results do not reflect the problems that= were experienced with IC disabled. H=E5vard On Fri, Nov 26, 2004 at 04:27:10PM +0100, Rune Johan Andresen wrote: >=20 > The application benchmarking behaved similar on the two clusters (with=20 > different HW), which makes > it more probably it is the overhead. As mentioned we didn't disable IC=20 > on the tg3 drive so we don't > really know. >=20 > - Rune >=20 > On Nov 26, 2004, at 11:44 AM, Jacob Gorm Hansen wrote: >=20 > >H=E5vard Bjerke wrote: > >>Rune and I just finished writing a report on using virtualization=20 > >>with Xen in clusters, with focus on network performance. You may=20 > >>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=20 > >higher interrupt-handling overhead than native Linux. I suppose that=20 > >with the new IO model, Xen needs to flush the TLBs for every interrupt= =20 > >that arrives. Do you think this is the reason for the overhead, or are= =20 > >the performance problems only due to your hardware being badly=20 > >supported by Xen? > > > >Jacob >=20 ------------------------------------------------------- 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/