MPI(1) Introduction to the Message-Passing Interface


MPI stands for Message Passing Interface. MPI is a specification (like C or Fortran) and there are a number of implementations. The rest of this man page describes the use of the MPICH implementation of MPI.


Add MPI to your path

% set path = ( $path /usr/local/mpi/bin )

for the csh and tcsh shells, or

% export path=$path:/usr/local/mpi/bin

for sh , ksh , and bash shells.

Compute pi to a given resolution on 8 processes

% mpiexec -n 8 /usr/local/mpi/examples/cpi

You can compile and link your own MPI programs with the commands mpicc , mpif77 , mpicxx , and mpif90 :

% mpicc -o cpi cpi.c
% mpif77 -o fpi fpi.f
% mpicxx -o cxxpi cxxpi.cxx
% mpif790 -o pi3f90 pi3f90.f90

using the source code from /usr/local/mpi/examples .


PDF documentation can be found in directory /usr/local/mpi/doc/ . These include an installation manual ( install.pdf ) and a user's manual ( usermanual.pdf ).

Man pages exist for every MPI subroutine and function. The man pages are also available on the Web at .

Additional on-line information is available at , including a hypertext version of the standard, information on other libraries that use MPI, and pointers to other MPI resources.


MPICH2 version 1.0


Copyright 2002 University of Chicago. See the file COPYRIGHT for details. The source code is freely available by anonymous ftp from in pub/mpi/mpich2-beta.tar.gz .


/usr/local/mpi/                 MPI software directory
/usr/local/mpi/COPYRIGHT        Copyright notice
/usr/local/mpi/README           various notes and instructions
/usr/local/mpi/bin/             binaries, including mpiexec and mpicc
/usr/local/mpi/examples         elementary MPI programs
/usr/local/mpi/doc/             documentation
/usr/local/mpi/include/         include files
/usr/local/mpi/lib/             library files


MPI-specific suggestions and bug reports should be sent to [email protected] .