/*****************************************************************************
*
* waiter_freq05.c 2012.05.19 Smythies
*        A program to build a script for use with the waiter program.
*        Everything is coded herein. Re-compile to change things.
*        This one sweeps the actual load over various sleep frequencies
*
*****************************************************************************/

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

#define LOOPS_PER_USEC 207.547 /* Tight loops per second. s15.smythies.com. CONFIG_NO_HZ=n and CONFIG_NO_HZ=y kernels */

void main(int argc, char **argv){

   double load, period, s, c, freq;
   int l;

   printf("#! /bin/bash\n");
   printf("uptime >freq_load\n");

   for(freq = 30.0; freq <=  150.1; freq = freq + 30.0){
      for(load = 0.05; load <= 0.96; load = load + 0.05){
         period = 1.0 / freq;
         c = period * load;
         s = period - c;
         if(s < 0.0){
            printf("Doug: you have screwed up. Sleep time is negative: %lf\n", s);
            exit (-1);
         } /* endif */
         l = (int) (c * LOOPS_PER_USEC * 1000000 + 0.5);
         printf("../c/waiter 1 %d %d %d\n", (int) (10.0 * freq + 0.5), l, (int) (s * 1000000 + 0.5));
         printf("uptime >>freq_load\n");
      } /* endfor */
      printf("\n");
   } /* endfor */
} /* endprogram */