[mpich-discuss] Processes involved in a MPI communicator.

[James Dinan]

Hi Matches,

You can use MPI_Comm_group() to get the groups (MPI groups are
essentially the process sets that communicators are built on) for the
communicators in question.  These groups can then be compared through
operations like MPI_Group_compare() or MPI_Group_intersection().

If you are interested in the names of each rank, you may find
MPI_Get_processor_name() helpful().

Best,
 ~Jim.

PS- Info on these operations:

http://www.mcs.anl.gov/research/projects/mpi/www/www3/

On 02/23/2011 03:43 AM, Mahesh Doijade wrote:
> 
> I want to know whether it is possible to get information about which 
> processes are part of which communicator . Is there any mpi routine
> which can give me this info.
>                                                                                        
> Mahesh Doijade
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