Difference between revisions of "Install MPI on a MacBook"
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Revision as of 17:53, 4 March 2017
--D. Thiebaut (talk) 12:43, 7 October 2013 (EDT)
updated --D. Thiebaut (talk) 16:50, 4 March 2017 (EST)
Download
- from https://www.open-mpi.org/software/ompi/v2.0/
- get the tar file openmpi-2.0.2.tar.bz2 (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-2.0.2.tar.bz2 . tar -xzvf openmpi-2.0.2.tar.bz2 cd openmpi-2.0.2 ./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 Hello world from process 0 of 2 Hello world from process 1 of 2
- If you see the two lines starting with "Hello world" on your screen, MPI was successfully installed on your system!