Hi Jed,
Thank you for your post; I have to admit that I never thought of this as
an option. As the "other way" [which Jeff has posted] is more natural
to me, I will probably try for that first -- but I'll keep what you
posted in the back of my mind.
Thanks a lot!
Ray
Jed Brown wrote:
On Mon 2008-11-10 12:35, Raymond Wan wrote:
With #define's and compiler flags, I think that can be easily done --
was wondering if this is something that developers using MPI do and
whether AC/AM supports it.
The normal way to do this is by building against a serial implementation
of MPI. Lots of parallel numerical libraries bundle such an
implementation so you could just grab one of those. For example, see
PETSc's mpiuni ($PETSC_DIR/include/mpiuni/mpi.h and
$PETSC_DIR/src/sys/mpiuni/mpi.c) which implements many MPI calls as
macros.
Note that your serial implementation only needs to provide the subset of
MPI that your program actually uses. For instance, if you never send
messages to yourself, you can implement MPI_Send as MPI_Abort since it
should never be called in serial.
