$ mpif90 barrier.f90 -o barrier
$ mpirun -np 4 ./barrier
Hello, I'm a process 1.
Hello, I'm a process 3.
Hello, I'm a process 0.
Hello, I'm a process 2.
Process 3 is starting jts job...
Process 1 is starting jts job...
Process 0 is starting jts job...
Process 2 is starting jts job...