21 January 2020 11:07:18 AM

TIMER_OMP_GET_WTIME
  C version

  Demonstrate the use of the OMP_GET_WTIME timer.

  omp_get_wtime ( ) is an OpenMP library function.

  It returns the elapsed wall clock time in seconds.

  The number of processors available:
  OMP_GET_NUM_PROCS () = 8

  OMP_SET_NUM_THREADS requests 8 threads.

TEST01
  Time the C RAND routine by computing N values.
  For a given N, repeat the computation 5 times.

  Data vectors will be of minimum size 1024
  Data vectors will be of maximum size 1048756

  Wall clock times are in seconds.

         N      Rep #1      Rep #2      Rep #2      Rep #4      Rep #5

      1024  x[0] = 1804289383
    0.000010  x[0] = 386839851
    0.000009  x[0] = 279527351
    0.000009  x[0] = 1662919361
    0.000009  x[0] = 1397401777
    0.000009
      2048  x[0] = 1891292515
    0.000020  x[0] = 361520407
    0.000019  x[0] = 1344992371
    0.000019  x[0] = 419186726
    0.000019  x[0] = 907339252
    0.000019
      4096  x[0] = 745712158
    0.000040  x[0] = 116276305
    0.000036  x[0] = 1531392060
    0.000038  x[0] = 1758050055
    0.000038  x[0] = 1135992855
    0.000037
      8192  x[0] = 358951894
    0.000077  x[0] = 1272174340
    0.000073  x[0] = 496561661
    0.000073  x[0] = 2134878203
    0.000074  x[0] = 869212447
    0.000074
     16384  x[0] = 791496463
    0.000156  x[0] = 350615169
    0.000148  x[0] = 1049613479
    0.000148  x[0] = 2009662218
    0.000148  x[0] = 2114718887
    0.000148
     32768  x[0] = 543828801
    0.000305  x[0] = 1459138466
    0.000300  x[0] = 989964655
    0.000300  x[0] = 745636671
    0.000299  x[0] = 675259397
    0.000299
     65536  x[0] = 608043060
    0.000621  x[0] = 1397237622
    0.000635  x[0] = 1493915180
    0.000548  x[0] = 142574706
    0.000547  x[0] = 1161560675
    0.000580
    131072  x[0] = 1899087921
    0.001213  x[0] = 270842687
    0.001203  x[0] = 452964975
    0.001093  x[0] = 1456711665
    0.001094  x[0] = 748455220
    0.001199
    262144  x[0] = 405118908
    0.002401  x[0] = 844041136
    0.002304  x[0] = 716498184
    0.002279  x[0] = 2049438716
    0.002309  x[0] = 1753313355
    0.002191
    524288  x[0] = 707539627
    0.004864  x[0] = 1705391276
    0.004413  x[0] = 672048454
    0.004436  x[0] = 1327769184
    0.004411  x[0] = 32459967
    0.004424
   1048576  x[0] = 365276336
    0.009512  x[0] = 1614963815
    0.008797  x[0] = 1532220195
    0.008978  x[0] = 798196474
    0.008942  x[0] = 411303290
    0.008898

TIMER_OMP_GET_WTIME
  Normal end of execution.

21 January 2020 11:07:18 AM