Open MPI logo

Open MPI Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Development mailing list

From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2005-08-17 12:02:53


Gotcha. Thanks -- I'll do a quick run-through of the code and ensure
that we only use ompi_comm_remote_site() in the appropriate places.

On Aug 17, 2005, at 11:47 AM, Edgar Gabriel wrote:

> Jeff,
>
> as far as I know nothing has changed in the communicator setup since
> quite a while, the remote group is still set to the local group for
> intra-communicators. However, ompi_comm_remote_size has a check whether
> we have an inter-comm, and returns else zero (which is in theory the
> correct answer)....
>
> Thanks
> Edgar
>
> Jeff Squyres wrote:
>> I thought that we set the remote group equal to the local group in
>> communicator setup such that ompi_comm_remote_size() was *always* safe
>> to call...?
>>
>> This no longer seems to be true -- while debugging the IMB (previously
>> the pallas benchmarks), I found that calling
>> ompi_comm_remote_size(comm) would return 0 and ompi_comm_size(comm)
>> would return 2 for a simple intracommunicator. This was with:
>>
>> mpirun -np 2 IMB-MPI1 Reduce
>>
>> Has something changed in communicator setup?
>>
>
>
> --
> ======================================================================
> Dr.-Ing. Edgar Gabriel
> Clusters and Distributed Units
> High Performance Computing Center Stuttgart (HLRS)
> University of Stuttgart
> Tel: +49 711 685 8039 http://www.hlrs.de/people/gabriel
> Fax: +49 711 678 7626 e-mail:gabriel_at_[hidden]
> ======================================================================
> _______________________________________________
> devel mailing list
> devel_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/devel
>

-- 
{+} Jeff Squyres
{+} The Open MPI Project
{+} http://www.open-mpi.org/