On Dec 5, 2008, at 6:58 PM, Anthony Chan wrote:
> AFAIK, all known/popular MPI implemention's fortran binding
> layer is implemented with C MPI functions, including
> MPICH2 and OpenMPI. If MPICH2's fortran layer was implemented
> the way you said, typical profiling tools including MPE will
> fail to work with fortran applications.
FWIW, NEC's MPI has their Fortran functions directly call back-end
functionality (vs. calling the C MPI API). We've considered doing
this for at least some key Fortran MPI API functions in Open MPI as
well. Specifically, have MPI_SEND [Fortran] directly call the back-
end sending functionality rather than calling MPI_Send [C] or
Hence, I don't think it's a good assumption to rely on (that the MPI
Fortran API always calls the [P]MPI C API).
I think one of George's middle points is the most relevant here: those
who are interested in this stuff should definitely participate in the
MPI Forum's Tools group: