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  1.     #include <iostream>
  2.     #include <unistd.h>
  3.     #include <string.h>
  4.     #include <sys/time.h>
  5.     #include <math.h>
  6.  
  7.     #include "osm.h"
  8.  
  9.  
  10.     #define INVALID_ITERATIONS 0
  11.     #define DEFAULT_ITERATIONS 1000
  12.     #define HOST_NAME_LEN 100
  13.     #define TO_NANO 1000
  14.  
  15.     using namespace std;
  16.     int main()
  17.     {
  18.         unsigned int iterations = (unsigned int) pow( 10, 9);
  19.  
  20.         measureTimes( iterations, iterations);
  21.  
  22.         return 0;
  23.     }
  24.  
  25. void foo();
  26.  
  27. timeMeasurmentStructure measureTimes (unsigned int operation_iterations,
  28.                                       unsigned int function_iterations)
  29. {
  30.  
  31.     double functionTimeNanoSecond;
  32.  
  33.     functionTimeNanoSecond = osm_function_time( function_iterations);
  34.     cout << "functionTimeNanoSecond: " << functionTimeNanoSecond << "\n";;
  35.  
  36.     double instructionTimeNanoSecond;
  37.  
  38.     instructionTimeNanoSecond = osm_operation_time( operation_iterations);
  39.     cout << "instructionTimeNanoSecond: " << instructionTimeNanoSecond << "\n"; 
  40. }
  41.  
  42.  
  43. double osm_operation_time(unsigned int iterations)
  44. {
  45.     timeval start;
  46.     gettimeofday(&start, NULL);
  47.  
  48.     for( int i = 0; i < iterations; i++ )
  49.     {
  50.         1+1;
  51.     }
  52.  
  53.     timeval end;
  54.     gettimeofday(&end, NULL);
  55.  
  56.     timeval diff;
  57.     timersub(&end, &start, &diff);
  58.  
  59.     double micro_seconds =(double) (end.tv_usec - start.tv_usec);
  60.  
  61.     double ret = diff.tv_usec / ((double) iterations);
  62.  
  63.  
  64.     return ret * TO_NANO;
  65. }
  66.  
  67. double osm_function_time(unsigned int iterations)
  68. {
  69.     timeval start;
  70.     gettimeofday(&start, NULL);
  71.  
  72.     for( int i = 0; i < iterations; i++ )
  73.     {
  74.         foo();
  75.     }
  76.  
  77.     timeval end;
  78.     gettimeofday(&end, NULL);
  79.  
  80.     timeval diff;
  81.     timersub(&end, &start, &diff);
  82.  
  83.     double micro_seconds = (double) (end.tv_usec - start.tv_usec);
  84.  
  85.     double ret = diff.tv_usec / ((double) iterations);
  86.  
  87.     return ret * TO_NANO;
  88. }
  89.  
  90. void foo()
  91. {
  92.     return;
  93. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp:7:21: fatal error: osm.h: No such file or directory
compilation terminated.
stdout
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Standard output is empty
https://ideone.com/8wclMY
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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