ring_mpi():
  Fortran77/MPI version
  Measure time required to transmit data
  around a ring of processes
 
  The number of processes is        4
 
  Timings based on     10 experiments
  N double precision values were sent
  in a ring transmission starting and ending at process 0
  and using a total of      4 processes.
 
         N           T min           T ave           T max
 
       100    0.457100E-05    0.187981E-04    0.141766E-03
      1000    0.258240E-04    0.568291E-04    0.253825E-03
     10000    0.932820E-04    0.128333E-03    0.289808E-03
    100000    0.443186E-03    0.630012E-03    0.179202E-02
   1000000    0.502252E-02    0.564189E-02    0.106065E-01
 
ring_mpi():
  Normal end of execution.