COMPUTE_PI
  C/OpenMP version

  Estimate the value of PI by summing a series.

  The number of processors available:
  OMP_GET_NUM_PROCS () = 2

  The number of threads is 2

R8_TEST:
  Estimate the value of PI,
  using double arithmetic.

  N = number of terms computed and added;

  MODE = SEQ for sequential code;
  MODE = OMP for Open MP enabled code;
  (performance depends on whether Open MP is used,
  and how many processes are available)

  ESTIMATE = the computed estimate of PI;

  ERROR = ( the computed estimate - PI );

  TIME = elapsed wall clock time;

  Note that you can''t increase N forever, because:
  A) ROUNDOFF starts to be a problem, and
  B) maximum integer size is a problem.

             N Mode    Estimate        Error           Time

             1  SEQ        3.200000       0.0584073        0.000000
             1  OMP        3.200000       0.0584073        0.000340
            10  SEQ        3.142426     0.000833331        0.000001
            10  OMP        3.142426     0.000833331        0.000139
           100  SEQ        3.141601     8.33333e-06        0.000006
           100  OMP        3.141601     8.33333e-06        0.000139
          1000  SEQ        3.141593     8.33333e-08        0.000053
          1000  OMP        3.141593     8.33333e-08        0.000163
         10000  SEQ        3.141593     8.33341e-10        0.000526
         10000  OMP        3.141593     8.33336e-10        0.000410
        100000  SEQ        3.141593     8.36842e-12        0.005425
        100000  OMP        3.141593     8.35332e-12        0.003793
       1000000  SEQ        3.141593     2.84217e-14        0.058904
       1000000  OMP        3.141593     1.06137e-13        0.029942
      10000000  SEQ        3.141593     6.21725e-14        0.556831
      10000000  OMP        3.141593     1.29674e-13        0.305292
     100000000  SEQ        3.141593     6.33271e-13        5.429985
     100000000  OMP        3.141593     1.16351e-13        2.937569
    1000000000  SEQ        3.141593     1.77636e-13       53.732426
    1000000000  OMP        3.141593     1.07914e-13       29.681772

COMPUTE_PI
  Normal end of execution.