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Re: [Xen-devel] Does dom0 see all physical processors? (RE: [Xen-ia64-de

To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Subject: Re: [Xen-devel] Does dom0 see all physical processors? (RE: [Xen-ia64-devel] SAL INFO virtualization)
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 4 Apr 2006 08:26:25 +0100
Cc: "Magenheimer, Dan \(HP Labs Fort Collins\)" <dan.magenheimer@xxxxxx>, Tristan Gingold <Tristan.Gingold@xxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
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On 4 Apr 2006, at 03:17, Tian, Kevin wrote:


Then consider your question about a large box with many processors.
How about the real environment? Is it the case to provide a 16-way SMP
box, or a 16-way NUMA box? I prefer to the latter. If it's a NUMA box,
dom0 sees physical ACPI table and can be configured as NUMA aware.

This is a model we must support if we are to have domain0 handle other processor-related ACPI activities (e.g., power management). The power information and available settings won't make much sense to the user unless there's an equivalence between VCPUs and PCPUs for domain0.

 -- Keir


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