$ mpirun -host localhost -n 1 ./mpitest : -host mic0 -n 1 -env OMP_NUM_THREADS=68 -env KMP_AFFINITY=compact ~/mpitest : -host mic1 -n 1 ~/mpitest
Hello world: rank 0 of 3 running on knl-lb0.jf.intel.com
Hello world: rank 1 of 3 running on mic0
Hello world: rank 2 of 3 running on mic1
FROM RANK 0 - numthreads = 64
FROM RANK 1 - numthreads = 68
FROM RANK 2 - numthreads = 272
Elapsed time from rank 0:   11068.11 (usec)
Elapsed time from rank 1:   57780.98 (usec)
Elapsed time from rank 2:  133417.13 (usec)
rank 0 pi=   3.141597270966