Install MPI on a MacBook
--D. Thiebaut (talk) 12:43, 7 October 2013 (EDT)
Download
- from http://www.open-mpi.org/software/ompi/v1.6/
- get the tar file openmpi-1.6.5.tar.gz (or whichever latest version is the current one).
Extract and Install
- Assume that the downloaded file is in your ~/Downloads directory
- Just follow the directions in the INSTALL file, which are summarized below. The installation was done on *my* machine, and assumes the user is thiebaut. Change and plug-in your own user name.
- open a Terminal window, and type the following commands in it:
cd mkdir mpi mkdir mpi/download cd mpi/download mv ../Downloads/openmpi-1.6.5.tar.gz . tar -xzvf openmpi-1.6.5.tar.gz cd openmpi-1.6.5 ./configure --prefix=/Users/thiebaut/mpi/ (replace thiebaut by your user name on your Mac)
The last command will take 10 minutes or so. When it is done, make all and install
make all install
This last command takes a while as well...
Update your path
- edit the .bash_profile file in your main account directory.
- locate the line that reads PATH=...
- right below this line, add the new line
PATH=$PATH:/Users/thiebaut/mpi/bin/
- and make sure your replace thiebaut by your account name!
- source your .bash_profile so that the new path is learnt by your system
cd source .bash_profile
- You are done!
Testing
Create this file in the directory of your choice, and call it helloWorld.c:
/* C Example */
#include <stdio.h>
#include <mpi.h>
int main (argc, argv)
int argc;
char *argv[];
{
int rank, size;
MPI_Init (&argc, &argv); /* starts MPI */
MPI_Comm_rank (MPI_COMM_WORLD, &rank); /* get current process id */
MPI_Comm_size (MPI_COMM_WORLD, &size); /* get number of processes */
printf( "Hello world from process %d of %d\n", rank, size );
MPI_Finalize();
return 0;
}
Compile and Run
mpicc -o hello helloWorld.c mpirun -np 2 ./hello