Testing MPI on Linux Mint Machines in FH
--D. Thiebaut (talk) 13:21, 15 May 2014 (EDT)
MPI Hosts
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 exit # (back to normal user shell) export MPICH_PORT_RANGE=12000:12099
- Try MPI program
mpiexec -n 4 -f host_file ./hello1 stdin: is not a tty stdin: is not a tty node 1 : Hello, world node 0 : Hello, world node 3 : Hello, world node 2 : Hello, world
