mpich

Open-source implementation of the MPI message passing interface

brewmacoslinux

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Implementation of the MPI Message Passing Interface standard

mpiccmpicxxmpifortmpiexecmpirun

Compile a C program with MPI$ mpicc -o hello hello.c

Run MPI program on 4 processes$ mpirun -np 4 ./hello

Compile and run a Fortran MPI program$ mpifort -o prog prog.f90 && mpirun -np 2 ./prog