#include <stdio.h>

#include <sys/time.h>

/* Repeat doing some busy-work floating point */

/* Until at least len seconds have passed */

double

do_cycles( int minimum_time )

{

	struct timeval start, now;

	double x, sum;

	gettimeofday( &start, NULL );

	for ( ;; ) {

		sum = 1.0;

		for ( x = 1.0; x < 250000.0; x += 1.0 ) {

			sum += x;

		}

		if ( sum < 0.0 ) {

			printf( "==>>  SUM IS NEGATIVE !!  <<==\n" );

		}

		gettimeofday( &now, NULL );

		if ( now.tv_sec >= start.tv_sec + minimum_time ) {

			break;

		}

	}

	return sum;

}