[Beowulf] 1 multicore machine cluster

Chris Samuel csamuel at vpac.org
Sat May 2 04:38:55 EDT 2009


----- "Mark Hahn" <hahn at mcmaster.ca> wrote:

> >> I think the term �node� is a loaded term in HPC. 
> 
> I think it's just a bit sloppy or at least contextual
> - I've never heard it used for anything other than "box".

There are also NUMA nodes which, amongst others,
the Linux kernel uses.  For AMD systems these
essentially map onto sockets.

For example on a dual socket, quad core Barcelona:

[root at tango001 node]# pwd
/sys/devices/system/node

[root at tango001 node]# ls -F
has_cpu  has_normal_memory  node0/  node1/  online  possible

[root at tango001 node]# cd node1

[root at tango001 node1]# ls
cpu4  cpu6  cpulist  distance  numastat
cpu5  cpu7  cpumap   meminfo   scan_unevictable_pages

[root at tango001 node1]# cat distance
20 10

cheers,
Chris
-- 
Christopher Samuel - (03) 9925 4751 - Systems Manager
 The Victorian Partnership for Advanced Computing
 P.O. Box 201, Carlton South, VIC 3053, Australia
VPAC is a not-for-profit Registered Research Agency

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