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#include <stdio.h>
#include <stdlib.h>
#include "cputime.h"
#define TIMING_TRIAL_SIZE 1000000
main()
{
int i;
double temp1, temp2, rn;
double temp_mult = TIMING_TRIAL_SIZE/1.0e6;
temp1 = cputime();
for(i=0; i<TIMING_TRIAL_SIZE; i++)
rn = drand48();
temp2 = cputime();
if(temp2-temp1 < 1.0e-15 )
{
printf("Timing Information not available/not accurate enough.\n\t...Exiting\n");
exit(1);
}
/* The next line is just used to ensure that the optimization does not remove the call to the RNG. Nothing is really printed. */
fprintf(stderr,"Last random number generated\n", rn);
printf("\nUser + System time Information (Note: MRS = Million Random Numbers Per Second)\n");
printf("\tDRAND48:\t Time = %7.3f seconds => %8.4f MRS\n",
temp2-temp1, temp_mult/(temp2-temp1));
putchar('\n');
}
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