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Re: [Xen-devel] Xen CPU limit?

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Xen CPU limit?
From: Martin Lukasik <martin.lukasik@xxxxxxxxxxxxx>
Date: Tue, 30 Mar 2010 10:16:36 +0100
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Pasi Kärkkäinen wrote:
I think the number of virtual cpus (vcpus) per guest is (was) 32,
and now in Xen 4.0.0 you can have up to 64 vcpus per guest.

The max number of physical cpus is 128 or so..

When I said "CPUs" I meant the number of physical CPUs (or strictly speaking: cores) visible by Dom0. I thought I got my RPM from RedHat's repo, but there is a possibility that I'm wrong here... and I thought that Xen won't support more than 32 cores. I'm not really after setting up 48 cores for one virtual machine, just wanted to be able to have all 48 visible in Dom0 (and then have up to 16 per VM).

Thanks for the answers; interesting read.

Kind regards,

Martin Lukasik                                    tel: +44 20 7269 3115
Bioinformatics Officer
Bioinformatics and Biostatistics
Cancer Research UK, London Research Institute
44 Lincoln's Inn Fields, London, WC2A 3PX, UK

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