06 October 2025 01:24:04 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
    0.000016  x[0] = 386839851
    0.000014  x[0] = 279527351
    0.000015  x[0] = 1662919361
    0.000015  x[0] = 1397401777
    0.000014
      2048  x[0] = 1891292515
    0.000030  x[0] = 361520407
    0.000029  x[0] = 1344992371
    0.000029  x[0] = 419186726
    0.000029  x[0] = 907339252
    0.000029
      4096  x[0] = 745712158
    0.000059  x[0] = 116276305
    0.000058  x[0] = 1531392060
    0.000061  x[0] = 1758050055
    0.000058  x[0] = 1135992855
    0.000058
      8192  x[0] = 358951894
    0.000118  x[0] = 1272174340
    0.000118  x[0] = 496561661
    0.000119  x[0] = 2134878203
    0.000118  x[0] = 869212447
    0.000118
     16384  x[0] = 791496463
    0.000237  x[0] = 350615169
    0.000237  x[0] = 1049613479
    0.000237  x[0] = 2009662218
    0.000237  x[0] = 2114718887
    0.000236
     32768  x[0] = 543828801
    0.000476  x[0] = 1459138466
    0.000473  x[0] = 989964655
    0.000474  x[0] = 745636671
    0.000473  x[0] = 675259397
    0.000475
     65536  x[0] = 608043060
    0.000977  x[0] = 1397237622
    0.000993  x[0] = 1493915180
    0.000959  x[0] = 142574706
    0.000974  x[0] = 1161560675
    0.001010
    131072  x[0] = 1899087921
    0.002169  x[0] = 270842687
    0.002109  x[0] = 452964975
    0.001928  x[0] = 1456711665
    0.001901  x[0] = 748455220
    0.001916
    262144  x[0] = 405118908
    0.003818  x[0] = 844041136
    0.004032  x[0] = 716498184
    0.004062  x[0] = 2049438716
    0.003908  x[0] = 1753313355
    0.003734
    524288  x[0] = 707539627
    0.008115  x[0] = 1705391276
    0.007330  x[0] = 672048454
    0.007725  x[0] = 1327769184
    0.007498  x[0] = 32459967
    0.007490
   1048576  x[0] = 365276336
    0.014943  x[0] = 1614963815
    0.015272  x[0] = 1532220195
    0.015349  x[0] = 798196474
    0.015348  x[0] = 411303290
    0.015326

timer_clock():
  Normal end of execution.

06 October 2025 01:24:05 AM