This is a basic Julia wrapper for the portable message passing system Message Passing Interface (MPI). Inspiration is taken from mpi4py, although we generally follow the C and not the C++ MPI API. (The C++ MPI API is deprecated.)
CMake is used to piece together the MPI wrapper. Currently a shared library MPI installation for C and Fortran is required (tested with Open MPI and MPICH). To install MPI.jl using the Julia packaging system, run
Pkg.update()
Pkg.add("MPI")Alternatively,
Pkg.clone("https://github.com/lcw/MPI.jl.git")
Pkg.build()which will build and install the wrapper into $HOME/.julia/vX.Y/MPI.
To run a Julia script with MPI, first make sure that using MPI or
import MPI is included at the top of your script. You should then be
able to run the MPI job as expected, e.g., with
mpirun -np 3 julia 01-hello.jl