Testing MPI on Linux Mint Machines in FH

--D. Thiebaut (talk) 13:21, 15 May 2014 (EDT)

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MPI Hosts

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Test #1: Run on Multi Cores of Same Host

• Login for FH345-02

cat > helloWorld.c
/* C Example */
#include <stdio.h>
#include <mpi.h>


int main ( 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;
}

[13:14:50] ~/mpi$: mpicc -o hello2 helloWorld.c

[13:16:15] ~/mpi$: mpiexec -np 2 -host localhost  ./hello2 
Hello world from process 0 of 2
Hello world from process 1 of 2

Test on 3 Hosts

• Generate new password-less entry

    ssh-keygen
    cp ~/.ssh/id_rsa.pub ~/.ssh/authorized_keys
    ls
    ls -l
    eval `ssh-agent -s`
    ssh-add
    ssh 131.229.101.176

• On all three machines, open ports 12000:12099

sudo -i
ufw allow proto tcp to any port 12000:12099