#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <stdint.h>

int
main(int ac, char *av[])
{
    int64_t amount = atoll(av[1]);
    int children = atoi(av[2]);

    while (--children)
        if (fork()) break;

    signal(SIGALRM, _exit);
    alarm(180);

    printf("Process %d allocating %ld bytes\n", getpid(), amount);

    char * buffer = malloc(amount);
    if (buffer == NULL) {
        perror("malloc");
        exit(-1);
    }

    size_t i, pgsize = getpagesize();
    for (;;) {
        printf("Process %d touching %ld bytes\n", getpid(), amount);
        for (i = 0; i < amount; i += pgsize) {
            buffer[i] = 0;
        }
    }
    sleep(100);

    return 0;
}