/*
 * Vários processos e muitas páginas. Major page faults?
 */ 
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include<sys/resource.h>

#define PAGESIZE 4096
#define N 100000

char mat[N][PAGESIZE];

void passeio(char c) {
  int i, j;
  for (i = 0; i < N; i++)
    for (j = 0; j < PAGESIZE; j++)
  mat[i][i%PAGESIZE] = c;
}

int main() {
  struct rusage uso0, uso1, uso2;

  fork();
  fork();
  fork();

  getrusage(RUSAGE_SELF, &uso0);
  passeio('*');
  getrusage(RUSAGE_SELF, &uso1);
  sleep(10);
  passeio('-');
  getrusage(RUSAGE_SELF, &uso2);

  if (uso2.ru_majflt > 0)
    printf("Falhas de página com ida ao disco: %d\n", uso2.ru_majflt);
  return 0;
}