mdp_timer.h

Go to the documentation of this file.

#ifndef NO_POSIX

double walltime() {
  double mic, time;
  double mega = 0.000001;
  struct timeval tp;
#if defined(HAVE_NO_TIMEZONE) 
  struct timezone {
    int  tz_minuteswest; // minutes of Greenwich 
    int  tz_dsttime;     // type of dst correction 
  } tzp = {0,0};
#else
  struct timezone tzp ={0,0};
#endif
  static long base_sec = 0;
  static long base_usec = 0;
  
  gettimeofday(&tp,&tzp);
  if (base_sec == 0) {
    base_sec = tp.tv_sec;
    base_usec = tp.tv_usec;
  }
  
  time = (double) (tp.tv_sec - base_sec);
  mic = (double) (tp.tv_usec - base_usec);
  time = (time + mic * mega);
  return(time);
}

string getname() {
  static char tmp[1024];
  gethostname(tmp,1024);
  return string(tmp);
}

void getcpuusage(double &user, double &total) {
  static long t[4], s[4];
  double sum, usage[4];
  FILE *fp;
  s[0]=t[0];
  s[1]=t[1];
  s[2]=t[2];
  s[3]=t[3];
  fp=fopen("/proc/stat", "r");
  fscanf(fp, "cpu  %li%li%li%li",&t[0],&t[1],&t[2],&t[3]);
  fclose(fp);
  usage[0]=(t[0]-s[0]);
  usage[1]=(t[1]-s[1]);
  usage[2]=(t[2]-s[2]);
  usage[3]=(t[3]-s[3]);
  sum=usage[0]+usage[1]+usage[2]+usage[3];
  usage[0]/=sum;
  usage[1]/=sum;
  usage[2]/=sum;
  usage[3]/=sum;
  user=100.0*(usage[0]); // user usage
  total=100.0*(usage[0]+usage[1]+usage[2]); // cpu usage
}
#else

double walltime() {
  return (double) clock()/CLOCKS_PER_SEC;
}

string getname() {
  return string("localhost");
}

void getcpuusage(double &user, double &total) {
  user=total=0;
}

#endif

---