MPI_REDUCE_LOCAL is not the same as MPI_REDUCE on MPI_COMM_SELF. The latter just copies inbuf to outbuf without doing any op. Reduce_local performs an op between inbuf and inoutbuf. If inbuf is missing, it doesn't make sense to call Reduce_local. On Oct 22, 2013, at 9:51 AM, Jeff Hammond wrote:

https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/353 is trivial but perhaps I am the only person that sees the point. Can the WG give a thumbs up or down on proceeding?

Thanks,

Jeff

-- Jeff Hammond [email protected] _______________________________________________ mpiwg-coll mailing list [email protected] http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-coll