On 03/05/2013 08:53 PM US Central Time, Hammond, Simon David (-EXP) wrote:
> From earlier posts it sounds like OpenMPI queries once per physical node
> so probably won't have this problem. I'm guessing MPICH would do
> something similar?
That's correct.
--
Pavan Balaji
Aside from the idea of saving the topology to a XML file before running
the job, you could also:
* rank 0 load the topology as usual
* rank 0 saves it to a XML buffer (hwloc_topology_export_xmlbuffer())
then MPI_Broadcast() to other ranks
* those ranks would just load a hwloc topology from the
