From mboxrd@z Thu Jan 1 00:00:00 1970 From: Håvard Bjerke Subject: Re: Xen & I/O in clusters - Single Vs. Dual CPU issue Date: Tue, 2 Nov 2004 17:13:08 +0100 Message-ID: <20041102161308.GD18329@idi.ntnu.no> References: <20041029183953.GB18329@idi.ntnu.no> 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: Ian Pratt Cc: =?unknown-8bit?Q?H=E5vard?= Bjerke , Rune Johan Andresen , Xen Virtual Machine Monitor List-Id: xen-devel@lists.xenproject.org On Fri, Oct 29, 2004 at 08:46:46PM +0100, Ian Pratt wrote: > > The native systems can have either XT-PIC or IOAPIC, and it seems tha= t both have equal performance. In Xen0, however, by looking through dmesg= , there doesn't seem to be any IOAPIC. Is it possible to enable (or disab= le) IOAPIC in Xen0? >=20 > If you boot with 'ignorebiostables' on the Xen command line Xen > will ignore the IOAPIC and use the PIC. >=20 > I could believe there might be a lurking performance problem with > PIC support as it probably hasn't had the same level of > performance testing as IOAPIC. >=20 'ignorebiostables' did the trick. Thanks for the help :)=20 Now I'm curious about live migration. Is it possible to live migrate an M= PI application running on a set of nodes to another set of nodes? Has any= one tried that? H=E5vard ------------------------------------------------------- This SF.Net email is sponsored by: Sybase ASE Linux Express Edition - download now for FREE LinuxWorld Reader's Choice Award Winner for best database on Linux. http://ads.osdn.com/?ad_id=5588&alloc_id=12065&op=click