OPEN MPI

       Open  MPI  is  an  open  source  implementation of MPI (message-passing interface), the industry-standard
       specification for writing message-passing programs. Message passing is a programming model that gives the
       programmer explicit control over interprocess communication.

       The MPI specification was developed by the MPI Forum, a group of software developers,  computer  vendors,
       academics,   and  computer-science  researchers  whose  goal  was  to  develop  a  standard  for  writing
       message-passing programs that would be efficient, flexible, and portable.

       The outcome, known as the MPI Standard, was first published in 1993; its most  recent  version  (MPI-4.0)
       was published in June 2021. Open MPI includes all MPI 3.1-compliant routines.

       For more information about Open MPI, see https://www.open-mpi.org.

       The MPI standards are available at https://www.mpi-forum.org.

MAN PAGE SYNTAX

       Man  pages  for  Open  MPI and Open MPI I/O routines are named according to C syntax, that is, they begin
       with the prefix MPI_, all in uppercase, and the first letter following the MPI_ prefix is also uppercase.
       The rest of the letters in the routine are all lowercase, for example, MPI_Comm_get_attr.

ENVIRONMENT

       To fine-tune your Open MPI environment, you can either use arguments to the mpirun or  mpiexec  commands,
       or you can use MCA parameters.

       For more information on arguments, see the mpirun(1) man page.

       For  a complete listing of MCA parameters and their descriptions, issue the command ompi_info --all.  See
       ompi_info(1) for more information.

ERRORS

       See MPI Errors for details about error values.

       SEE ALSO:
          MPI_T mpirun(1) mpiexec(1) ompi_info(1)

COPYRIGHT

       2003-2025, The Open MPI Community

                                                  Feb 17, 2025                                       OPEN-MPI(7)