#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sched.h>
#include <linux/sched.h>

struct sched_param blank;

void go_idle() {
	int result = sched_setscheduler(0, SCHED_IDLE, &blank);
	if (result != 0)
		printf("Failed to set idle priority.\n");
}

void busyloop() {
	volatile int n, t;
	volatile int x = 1;
	for (t = 0; t < 4; t++)
		for (n = 0; n < 0x70000000; n++)
			x *= n;
	exit(0);
}

pid_t spawn() {
	pid_t pid = fork();
	if (pid == 0)
		busyloop();
	return pid;
}

int main(int argc, char *argv[]) {
	pid_t pid1, pid2;
	go_idle();
	pid1 = spawn();
	pid2 = spawn();

	int status;

	waitpid(pid1, &status, 0);
	waitpid(pid2, &status, 0);

	return 0;
}