mpiwg-coll

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July 2018

5 participants
12 discussions

Re: [mpiwg-coll] backward communication in neighborhood collectives
by Anthony Skjellum 15 Jul '18

15 Jul '18

Hi, I just saw this. We definitely need to consider this concern. I also need to go review the APIs. Thanks, Tony On Sat, Jul 14, 2018 at 12:27 AM, Junchao Zhang <jczhang(a)mcs.anl.gov> wrote: > I want to try MPI neighborhood collectives. I have a communication graph > and want to do both forward and backward communication along the edges. > With current APIs, it looks I need to create two comm_dist_graphs. It is a > waste since MPI implementations can do similar optimizations for the two. > Should MPI support this scenario? Thanks. > > --Junchao Zhang > > _______________________________________________ > mpiwg-coll mailing list > mpiwg-coll(a)lists.mpi-forum.org > https://lists.mpi-forum.org/mailman/listinfo/mpiwg-coll > > -- Tony Skjellum, PhD RunTime Computing Solutions, LLC tony(a)runtimecomputing.com direct: +1-205-918-7514 cell: +1-205-807-4968

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backward communication in neighborhood collectives
by Junchao Zhang 13 Jul '18

13 Jul '18

I want to try MPI neighborhood collectives. I have a communication graph and want to do both forward and backward communication along the edges. With current APIs, it looks I need to create two comm_dist_graphs. It is a waste since MPI implementations can do similar optimizations for the two. Should MPI support this scenario? Thanks. --Junchao Zhang

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