I'll buy that.
> Sounds like you have a good reason to spawn processes. Given the
> current MPI-2 draft, I see no barrier to this. There is nothing
> preventing your original process from "becoming" an MPI process by
> calling MPI_Init().
Except it's not at all portable currently. I don't even know if it
would work in any current MPI implementation (since this behavior is
currently undefined). It does happen to work in LAM 6.0, I just tried
> It may be that current implementations require it to be started by
> mpirun, but this is just an implementation detail, [n]ot a
> fundamental problem. Then you can spawn the rest of the processes
> with MPI_Spawn. So I understand correctly?
Yup, exactly. All I really want to do is get a sentence in the
standard that says what happens if you call MPI_Init() with no mpirun
or spawn above it (it becomes a singleton, assuming the implementation
supports dynamic processes).
-- Gary Oberbrunner firstname.lastname@example.org Advanced Visual Systems, Inc. http://www.avs.com/~garyo 300 Fifth Avenue (617)890-8192 x2133 TEL Waltham, MA 02154 (617)890-8287 FAX