[mpiwg-rma] MPI_WIN_CREATE for intercommunicators

Jeff Hammond jeff.science at gmail.com
Tue Feb 11 10:56:38 CST 2014

On Tue, Feb 11, 2014 at 10:53 AM, Thomas Jahns <jahns at dkrz.de> wrote:
> Hello Jim,
> On 02/11/14 16:59, Jim Dinan wrote:
>> This sounds like a reasonable proposal to me; it should be possible to create a
>> sane definition for windows on intercommunicators.  The RMA interface has
>> focused on intracommunicators, so it could require several additions to e.g.
>> make it possible to query both local and remote groups from the window.  I think
>> the main argument against adding this would be the increased complexity in the
>> standard and to implementations.  Given that there is a workaround (flattening
>> the communicator to make the window, and using post/start/complete/wait to
>> restrict the set of communication peers in active target), we would need to
>> motivate such a change.
>> I captured your proposal in a ticket,
>> https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/412, so we remember to
>> discuss this further in the RMA working group.
> thank you. Will remaining subscribed to this list be sufficient to receive
> notice of updates or should I poll above issue every few weeks?

Polling is bad :-)  I can cc you on the ticket as well if you like.


Jeff Hammond
jeff.science at gmail.com

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