[mpich-discuss] Affinity with MPICH_ASYNC_PROGRESS

[Pavan Balaji]

On 02/23/2013 06:49 PM US Central Time, Jeff Hammond wrote:
> My understanding, having looked at the code for this, is that no
> thread binding is set.  The OS will hopefully do the right thing when
> the cores are undersubscribed, but I see no thread affinity code in
> the MPICH source for the comm threads.

This is incorrect.  Hydra allows you to bind a process to a cpuset.  If
you are using an affinity thread, make sure your cpuset has at least 2
cores in it.

 -- Pavan

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji