Re: [Xen-devel] strange cpu number from xm info

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

> From: Zhigang Wang
> Sent: Friday, April 06, 2012 2:01 PM
> To: Jan Beulich
> Cc: xen-devel@xxxxxxxxxxxxx
> Subject: Re: [Xen-devel] strange cpu number from xm info
> 
> On 04/06/2012 03:52 PM, Jan Beulich wrote:
> >>>> Zhigang Wang <zhigang.x.wang@xxxxxxxxxx> 04/06/12 2:45 PM >>>
> >> nr_cpus                : 8
> >> nr_nodes               : 1
> >> cores_per_socket       : 4
> >> threads_per_core       : 1
> >>
> >> I thought nr_cpus = nr_nodes * cores_per_socket * threads_per_core
> > nr_cpus = nr_nodes * sockets_per_node * cores_per_socket * threads_per_core
> It seems on xm/xl info we don't show how many sockets_per_node. Can we do that
> in the future?
> 
> It seems this machine has: sockets_per_node = 2.
> 
> Thanks very much Jan.
> 
> Zhigang

Hi Zhigang --

Unfortunately, the world of CPUs is getting more complicated
and can no longer be described so simply.  See for example:

http://lists.xen.org/archives/html/xen-devel/2009-11/msg00885.html 

On a Friday afternoon, this makes my head hurt...

Dan

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