[Mpi-forum] [MPI Forum] #286: Noncollective Communicator Creation

[William Gropp]

I suspect the info hint

nowildcards=true

would be useful for some implementations.  Note also the MPI_Comm_dup_info call; its not just split_type.

Bill

William Gropp
Director, Parallel Computing Institute
Deputy Director for Research
Institute for Advanced Computing Applications and Technologies
Paul and Cynthia Saylor Professor of Computer Science
University of Illinois Urbana-Champaign



On Jul 18, 2012, at 2:43 PM, MPI Forum wrote:

> #286: Noncollective Communicator Creation
> -------------------------------------+-------------------------------------
>                  Reporter:  jdinan  |                          Owner:
>                      Type:  New     |  jdinan
>  routine(s)                         |                         Status:
>                  Priority:  Passed  |  assigned
>                   Version:  MPI     |                      Milestone:
>  3.0                                |  2012/05/28 Japan
>                  Keywords:          |                     Resolution:
>  communicators                      |          Implementation status:
>        Author: Bill Gropp:  0       |  Completed
>        Author: Adam Moody:  0       |            Author: Rich Graham:  0
>     Author: Dick Treumann:  0       |        Author: Torsten Hoefler:  0
>    Author: George Bosilca:  0       |  Author: Jesper Larsson Traeff:  0
> Author: Bronis de Supinski:  0       |             Author: David Solt:  0
>      Author: Jeff Squyres:  0       |          Author: Rajeev Thakur:  0
> Author: Rolf Rabenseifner:  0       |      Author: Alexander Supalov:  0
> -------------------------------------+-------------------------------------
> 
> Comment (by jdinan):
> 
> I don't think we ever had a use case for the info argument, so we never
> added it.  The info key in MPI_Comm_split_type was added to allow the user
> to specify machine topology hints.
> 
> -- 
> Ticket URL: <https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/286#comment:16>
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