Message Passing Interface (MPI)

Just include the mpi header file to the user program (C, C++ or FORTRAN).

#include<mpi.h>

or

INCLUDE 'mpif.h'

MPI is large due to functionality and Performance options, but small because many parallel programs can be written with 6 basic functions.

1. MPI_INIT (MPI_INIT_THREAD)

2. MPI_COMM_SIZE

3. MPI_COMM_RANK

4. MPI_SEND

5. MPI_RECV

6. MPI_FINALIZE

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For more details, please visit MPI Forum