MPI reduction time on pid 0 is 0.000035
MPI reduction value is 6
pid 0 time for my reduction on 4 processes is  0.000017, the value is 6

MPI reduction time on pid 0 is 0.000092
MPI reduction value is 28
pid 0 time for my reduction on 8 processes is  0.000014, the value is 28

MPI reduction time on pid 0 is 0.000247
MPI reduction value is 120
pid 0 time for my reduction on 16 processes is  0.000015, the value is 120