[Gllug] Dual core

[Richard Jones]

On Wed, May 16, 2007 at 10:00:55AM +0100, John Hearns wrote:
> Also on that system, cat /proc/cpuinfo | grep cores  returns
> 
> cpu cores       : 2
> cpu cores       : 2
> cpu cores       : 2
> cpu cores       : 2
> cpu cores       : 2
> cpu cores       : 2
> cpu cores       : 2
> cpu cores       : 2

I've got a machine here which has two sockets, two cores in each
socket, and I get:

$ cat /proc/cpuinfo | grep core
core id         : 0
cpu cores       : 1
core id         : 0
cpu cores       : 1
core id         : 0
cpu cores       : 1
core id         : 0
cpu cores       : 1

So 'cpu cores' doesn't seem very reliable.

NUMA / sockets / cores / threads is a hierarchical relationship, and
it's about time that /proc/cpuinfo2 (or something) was invented to
show the hierarchy explicitly.

Rich.

-- 
Richard Jones
Red Hat
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