---

tesleep.cc

Go to the documentation of this file.

#include "_timer.h"

#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>

static want_to_quit_tesleep = 0;

static void
quit_tesleep (int sig)
{
  want_to_quit_tesleep = 1;
}
main (int argc, char **argv)
{
  double last_time;
  double cycle_time;
  double current_time;
  double max_time = 0.0;
  double min_time = 1e9;
  double start_time;
  double stop_time;
  int num_cycles;
  double total_time;
  int i;

  if (argc > 1)
    {
      cycle_time = atof (argv[1]);
    }
  else
    {
      cycle_time = clk_tck ();
    }

  if (argc > 2)
    {
      num_cycles = strtol (argv[2], NULL, 0);
    }
  else
    {
      num_cycles = 10000;
    }

  signal (SIGINT, quit_tesleep);
  printf ("cycle_time = %f\n", cycle_time);
  printf ("num_cycles = %d\n", num_cycles);
  fflush (stdout);
  esleep (cycle_time);

  start_time = last_time = etime ();
  for (i = 0; i < num_cycles && !want_to_quit_tesleep; i++)
    {
      esleep (cycle_time);
      current_time = etime ();
      if (current_time - last_time > max_time)
        {
          max_time = (current_time - last_time);
        }
      if (current_time - last_time < min_time)
        {
          min_time = (current_time - last_time);
        }
      last_time = current_time;
    }
  stop_time = etime ();
  total_time = stop_time - start_time;
  printf ("num_cycles = %d\n", i);
  printf ("total time = %f\n", total_time);
  printf ("avg cycle time = %f\n", (total_time) / i);
  printf ("min cycle time = %f\n", min_time);
  printf ("max cycle time = %f\n", max_time);

}

---