RE: [Xen-devel] [PATCH] xen, tools/python/xen: pincpu support, vcpus, add vcpu to cpu map

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> > 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.

Interesting point. What does Linux do? I guess it has a sparse set of
CPU id's?

Ian

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