10 May 2025 01:24:27 PM

TIMER_CLOCK():
  C version
  Demonstrate the use of the CLOCK timer.

  CLOCK is a standard C library routine
  (defined in time.h)

  It returns the processor time used by the program
  since the beginning of program execution.
  Divide this by CLOCKS_PER_SEC to convert to seconds.

  CLOCK is a crude timer, and results less than
  a tenth of a second are probably not reliable.

  The number of clock ticks per second is 1000000

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

  CPU times are in seconds.

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

      1024  x[0] = 1804289383
    0.000015  x[0] = 386839851
    0.000014  x[0] = 279527351
    0.000014  x[0] = 1662919361
    0.000014  x[0] = 1397401777
    0.000014
      2048  x[0] = 1891292515
    0.000028  x[0] = 361520407
    0.000027  x[0] = 1344992371
    0.000028  x[0] = 419186726
    0.000028  x[0] = 907339252
    0.000028
      4096  x[0] = 745712158
    0.000055  x[0] = 116276305
    0.000055  x[0] = 1531392060
    0.000057  x[0] = 1758050055
    0.000094  x[0] = 1135992855
    0.000055
      8192  x[0] = 358951894
    0.000111  x[0] = 1272174340
    0.000112  x[0] = 496561661
    0.000113  x[0] = 2134878203
    0.000113  x[0] = 869212447
    0.000112
     16384  x[0] = 791496463
    0.000225  x[0] = 350615169
    0.000266  x[0] = 1049613479
    0.000225  x[0] = 2009662218
    0.000224  x[0] = 2114718887
    0.000225
     32768  x[0] = 543828801
    0.000506  x[0] = 1459138466
    0.000449  x[0] = 989964655
    0.000523  x[0] = 745636671
    0.000450  x[0] = 675259397
    0.000521
     65536  x[0] = 608043060
    0.000958  x[0] = 1397237622
    0.000957  x[0] = 1493915180
    0.000957  x[0] = 142574706
    0.000957  x[0] = 1161560675
    0.000979
    131072  x[0] = 1899087921
    0.001842  x[0] = 270842687
    0.001895  x[0] = 452964975
    0.001885  x[0] = 1456711665
    0.001883  x[0] = 748455220
    0.001882
    262144  x[0] = 405118908
    0.003780  x[0] = 844041136
    0.003789  x[0] = 716498184
    0.004339  x[0] = 2049438716
    0.003832  x[0] = 1753313355
    0.003880
    524288  x[0] = 707539627
    0.007376  x[0] = 1705391276
    0.007206  x[0] = 672048454
    0.007207  x[0] = 1327769184
    0.007206  x[0] = 32459967
    0.007239
   1048576  x[0] = 365276336
    0.014443  x[0] = 1614963815
    0.014416  x[0] = 1532220195
    0.014444  x[0] = 798196474
    0.014413  x[0] = 411303290
    0.014517

timer_clock():
  Normal end of execution.

10 May 2025 01:24:28 PM