Your /proc/cpuinfo output (filtered below) looks like only two sockets (physical ids 0 and 1), with one core each (cpu cores=1, core id=0), with hyperthreading (siblings=2). So lstopo looks good.
E5-2650 is supposed to have 8 cores. I assume you use Linux cgroups/cpusets to restrict the available cores. The missconfiguration may be there.
Brice




Le 30/05/2012 15:14, Mike Dubman a écrit :
or, lstopo lies (Im not using the latest hwloc but one which comes with distro).
The machine has two dual-code sockets, total 4 physical cores:
processor       : 0
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1

processor       : 1
physical id     : 1
siblings        : 2
core id         : 0
cpu cores       : 1

processor       : 2
physical id     : 0
siblings        : 2
core id         : 0
cpu cores       : 1

processor       : 3
physical id     : 1
siblings        : 2
core id         : 0
cpu cores       : 1



On Wed, May 30, 2012 at 3:40 PM, Ralph Castain <rhc@open-mpi.org> wrote:
Hmmm...well, from what I see, mpirun was actually giving you the right answer! I only see TWO cores on each node, yet you told it to bind FOUR processes on each node, each proc to be bound to a unique core.

The error message was correct - there are not enough cores on those nodes to do what you requested.


On May 30, 2012, at 6:19 AM, Mike Dubman wrote:

attached.

On Wed, May 30, 2012 at 2:32 PM, Jeff Squyres <jsquyres@cisco.com> wrote:
On May 30, 2012, at 7:20 AM, Jeff Squyres wrote:

>> $hwloc-ls --of console
>> Machine (32GB)
>>  NUMANode L#0 (P#0 16GB) + Socket L#0 + L3 L#0 (20MB) + L2 L#0 (256KB) + L1 L#0 (32KB) + Core L#0
>>    PU L#0 (P#0)
>>    PU L#1 (P#2)
>>  NUMANode L#1 (P#1 16GB) + Socket L#1 + L3 L#1 (20MB) + L2 L#1 (256KB) + L1 L#1 (32KB) + Core L#1
>>    PU L#2 (P#1)
>>    PU L#3 (P#3)
>
> Is this hwloc output exactly the same on both nodes?


More specifically, can you send the lstopo xml output from each of the 2 nodes you ran on?

--
Jeff Squyres
jsquyres@cisco.com
For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/


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