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xen-devel
Re: [Xen-devel] [PATCH] xen, tools/python/xen: pincpu support, vcpus, ad
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To: |
"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>, "Mark Williamson" <mark.williamson@xxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
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Subject: |
Re: [Xen-devel] [PATCH] xen, tools/python/xen: pincpu support, vcpus, add vcpu to cpu map |
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From: |
Andrew Theurer <habanero@xxxxxxxxxx> |
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Date: |
Thu, 14 Apr 2005 14:07:17 -0500 |
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Cc: |
Ryan Harper <ryanh@xxxxxxxxxx>, Sam Gill <samg@xxxxxxxxxxxxx> |
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Thu, 14 Apr 2005 19:07:14 +0000 |
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On Thursday 14 April 2005 14:00, Ian Pratt wrote:
> > If the enumeration is done in a standardised way then it's
> > possible to work out in userspace what CPU id is where but
> > it's not at all obvious to the user right now. Would
> > definitely be good for the management tools to give more
> > information to the user on this stuff.
>
> Yep. 'xm info' should give the total number of logical CPUs, then
> show the hierarchy: nodes, sockets, cores, hyperthreads (in that
> order, which is how they should be enumerated to get the scalar CPU
> number).
Any thoughts how this would work with hotplug cpu support (in xen)? Do
we currently leave gaps in the cpu numbering for missing cpus?
For example, we have a 4 socket HT system with 2 chips installed,
available cpu id's may look like 0,1,3,4.
-Andrew
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