$ mpirun -n 2 -host localhost ./montecarlo : -n 3 -host mic0 /tmp/montecarlo.knc \ : -n 5 -host mic1 /tmp/montecarlo.knc Hello world: rank 0 of 10 running on knc0 Hello world: rank 1 of 10 running on knc0 Hello world: rank 2 of 10 running on knc0-mic0 Hello world: rank 3 of 10 running on knc0-mic0 Hello world: rank 4 of 10 running on knc0-mic0 Hello world: rank 5 of 10 running on knc0-mic1 Hello world: rank 6 of 10 running on knc0-mic1 Hello world: rank 7 of 10 running on knc0-mic1 Hello world: rank 8 of 10 running on knc0-mic1 Hello world: rank 9 of 10 running on knc0-mic1 Elapsed time from rank 0: 13.87 (sec) Elapsed time from rank 1: 14.01 (sec) Elapsed time from rank 2: 195.16 (sec) Elapsed time from rank 3: 195.17 (sec) Elapsed time from rank 4: 195.39 (sec) Elapsed time from rank 5: 195.07 (sec) Elapsed time from rank 6: 194.98 (sec) Elapsed time from rank 7: 223.32 (sec) Elapsed time from rank 8: 194.22 (sec) Elapsed time from rank 9: 193.70 (sec) Out of 4294967295 points, there are 2248849344 points inside the sphere => pi= 3.141606330872