#define _GNU_SOURCE

#include <unistd.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/sysinfo.h>
#include <stdio.h>

char *x;

unsigned long long arena_size = 1L * 1024 * 1024 * 1024;
unsigned long long start;

void * worker(void *p) {
	int n;
	while (n<arena_size) {
		x[n]++;
		n += 4095;
	}
}

int main( int ac, char ** av ) {
	int n, nthr = get_nprocs();
	pthread_t *threads = malloc(sizeof(pthread_t) * nthr);

	x = malloc(arena_size);
	if (x==(caddr_t)-1) {
		exit(1);
	}

	for (n=0; n<nthr; n++)
		pthread_create(&threads[n], NULL, worker, NULL);

	while (n--)
		pthread_join(threads[n], NULL);

	return 0;
}