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Difference between revisions of "MPI Hello World"
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→MPI Hello World
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create a folder and save this file as <
You can compile this program with
mpicc -g hello_mpi.c -o hello_mpi
You now have an executable called <tt> hello_mpi </tt>
You can run the command with
mpirun ./hello_mpi
With no other arguments, mpirun will run all of the tasks on the local machine, usually one for each CPU core. You should see a hello world from each process, on each cpu core.
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Put that line in a file called
Now run your program with that hostfile, using
mpirun --hostfile localhost ./hello_mpi
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