[Mpi-forum] New tickets on MPI Virtual Topology Functions

Bronis R. de Supinski bronis at llnl.gov
Mon Oct 12 11:29:44 CDT 2009


The basic goal -- improving the usability of Cartesian
communicators -- is definitely worthwhile. The specific
proposals seem reasonable; I might tweak the wordings...

Are the two proposals mutually exclusive? One seeks to
improve MPI_Dims_create while the other proposes to
deprecate it. It seems like we should go one way or the
other but not both. I suppose we could enact both if
we omit part one (the deprecation) of the second.

Could we just deprecate MPI_Dims_create and replace it
with a new function that serves the exact same purpose
but also has a communicator argument? I seem to recall
that the idea was that sometimes the user either needs
to do some data movement prior to the communicator
creation or might want to fine-tune the results that
MPI_Cart_create would otherwise provide...

I gues the other changes to MPI_Cart_create would still
be needed but do not necessarily eliminate the need for
the manual process.


On Sun, 11 Oct 2009, Pavan Balaji wrote:

> We created two new tickets on MPI_Dims_create and MPI_Cart_create
> functionality:
> https://*svn.mpi-forum.org/trac/mpi-forum-web/ticket/194
> https://*svn.mpi-forum.org/trac/mpi-forum-web/ticket/195
> Please take a look at them and any comments as appropriate.
> Thanks,
>   -- Pavan
> PS: Is there an MPI-3 mailing list where these kind of emails are more
> appropriate, instead of the general MPI Forum mailing list?
> --
> Pavan Balaji
> http://*www.*mcs.anl.gov/~balaji
> _______________________________________________
> mpi-forum mailing list
> mpi-forum at lists.mpi-forum.org
> http://*lists.mpi-forum.org/mailman/listinfo.cgi/mpi-forum

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