21 January 2020 11:07:18 AM

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
    0.000013  x[0] = 386839851
    0.000008  x[0] = 279527351
    0.000009  x[0] = 1662919361
    0.000008  x[0] = 1397401777
    0.000010
      2048  x[0] = 1891292515
    0.000018  x[0] = 361520407
    0.000017  x[0] = 1344992371
    0.000016  x[0] = 419186726
    0.000020  x[0] = 907339252
    0.000019
      4096  x[0] = 745712158
    0.000038  x[0] = 116276305
    0.000036  x[0] = 1531392060
    0.000033  x[0] = 1758050055
    0.000033  x[0] = 1135992855
    0.000037
      8192  x[0] = 358951894
    0.000076  x[0] = 1272174340
    0.000076  x[0] = 496561661
    0.000070  x[0] = 2134878203
    0.000070  x[0] = 869212447
    0.000070
     16384  x[0] = 791496463
    0.000149  x[0] = 350615169
    0.000142  x[0] = 1049613479
    0.000133  x[0] = 2009662218
    0.000149  x[0] = 2114718887
    0.000150
     32768  x[0] = 543828801
    0.000283  x[0] = 1459138466
    0.000262  x[0] = 989964655
    0.000374  x[0] = 745636671
    0.000262  x[0] = 675259397
    0.000262
     65536  x[0] = 608043060
    0.000603  x[0] = 1397237622
    0.000557  x[0] = 1493915180
    0.000523  x[0] = 142574706
    0.000524  x[0] = 1161560675
    0.000523
    131072  x[0] = 1899087921
    0.001216  x[0] = 270842687
    0.001125  x[0] = 452964975
    0.001117  x[0] = 1456711665
    0.001159  x[0] = 748455220
    0.001062
    262144  x[0] = 405118908
    0.002286  x[0] = 844041136
    0.002170  x[0] = 716498184
    0.002092  x[0] = 2049438716
    0.002161  x[0] = 1753313355
    0.001991
    524288  x[0] = 707539627
    0.004501  x[0] = 1705391276
    0.004013  x[0] = 672048454
    0.004071  x[0] = 1327769184
    0.004011  x[0] = 32459967
    0.003984
   1048576  x[0] = 365276336
    0.008672  x[0] = 1614963815
    0.008084  x[0] = 1532220195
    0.007976  x[0] = 798196474
    0.008418  x[0] = 411303290
    0.008403

TIMER_CLOCK
  Normal end of execution.

21 January 2020 11:07:18 AM