From: Dan Magenheimer <dan.magenheimer@oracle.com>
To: Zhigang Wang <zhigang.x.wang@oracle.com>,
Jan Beulich <jbeulich@suse.com>
Cc: xen-devel@lists.xen.org
Subject: Re: strange cpu number from xm info
Date: Fri, 6 Apr 2012 14:09:26 -0700 (PDT) [thread overview]
Message-ID: <38323a78-6bbd-4206-a2b0-e637240f68bf@default> (raw)
In-Reply-To: <4F7F4B82.6040007@oracle.com>
> From: Zhigang Wang
> Sent: Friday, April 06, 2012 2:01 PM
> To: Jan Beulich
> Cc: xen-devel@lists.xen.org
> 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@oracle.com> 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
next prev parent reply other threads:[~2012-04-06 21:09 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-06 12:45 strange cpu number from xm info Zhigang Wang
2012-04-06 19:52 ` Jan Beulich
2012-04-06 20:01 ` Zhigang Wang
2012-04-06 21:09 ` Dan Magenheimer [this message]
2012-04-07 7:39 ` Ian Campbell
2012-05-31 13:15 ` Zhigang Wang
2012-05-31 14:00 ` Dario Faggioli
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