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Re: [Xen-devel] Supported #of CPUs/VMs per CPUs

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Supported #of CPUs/VMs per CPUs
From: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
Date: Mon, 18 Sep 2006 13:17:05 +0100
Cc: whit <whitson22@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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On Mon, Sep 18, 2006 at 10:22:57AM +0100, Keir Fraser wrote:
> On 15/9/06 18:18, "whit" <whitson22@xxxxxxxxxxx> wrote:
> > Can find documented how many CPUS can Xen support and how many Virtual
> > Machines per CPU are allowed?  Can someone please supply this info?
> Xen supports up to 32 CPUs on a 32-bit system, or 64 CPUs (by default) on a
> 64-bit system. Guests can have up to 32 virtual CPUs. The only limit to
> number of domains is amount of hardware resource (mainly memory) that you
> have to share.

Are these hard limits, or just the kernel config defaults for Xen kernels ?
Any reason the guest VCPU count is limited to less than the physical number
on x86_64 ? (not that I expect much demand for 64 CPU guests)

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