Demand Paging

C

#include <iostream>
#include <chrono>
#include <sys/mman.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>

using namespace std;

int main(){
  mlockall(MCL_FUTURE);

  std::chrono::system_clock::time_point  start, end;
  start = std::chrono::system_clock::now();

  auto tt = new char[4194304];
  memset(tt, 0, 4194304);

  end = std::chrono::system_clock::now();
  auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end-start).count();

  cout << elapsed << endl;
}