#! /usr/bin/env stap

global traced_pid, command
global allocation, free
global anon_fault, anon_usrfree, anon_pgin, anon_cow, anon_unmap

function log_event:long ()
{
  return (!traced_pid || traced_pid == pid())
}

probe kernel.trace("mm_page_alloc")!, kernel.trace("mm_page_allocation") {
  if (!log_event()) next
  allocation[pid()] <<< 1
  command[pid()] = execname()
}

probe kernel.trace("mm_page_free")!, kernel.trace("mm_page_free_direct") {
  if (!log_event()) next
  free[pid()] <<< 1
}

probe kernel.trace("mm_anon_fault") {
  if (!log_event()) next
  anon_fault[pid()] <<< 1
}

probe kernel.trace("mm_anon_pgin") {
  if (!log_event()) next
  anon_pgin[pid()] <<< 1
}

probe kernel.trace("mm_anon_cow") {
  if (!log_event()) next
  anon_cow[pid()] <<< 1
}

probe kernel.trace("mm_anon_unmap") {
  if (!log_event()) next
  anon_unmap[pid()] <<< 1
}

probe kernel.trace("mm_anon_userfree") {
  if (!log_event()) next
  anon_usrfree[pid()] <<< 1
}

probe begin {
  printf("Starting data collection\n")
  traced_pid = target()
  if (traced_pid)
    printf("mode Specific Pid, traced pid: %d\n\n", traced_pid)
  else
    printf("mode - All Pids\n\n")
}

probe end {
  printf("Terminating data collection\n")
  printf("%-16s %6s %8s %7s %7s %7s %7s %7s %7s\n",
         "Command", "Pid", "Alloc", "Free", "A_fault",
          "A_ufree", "A_pgin", "A_cow", "A_unmap")
  printf("%-16s %6s %8s %7s %7s %7s %7s %7s %7s\n",
         "-------", "---", "-----", "----", "-------",
         "-------", "------", "-----", "-------")
  foreach (pid in allocation-)
    printf("%-16s %6d %8d %7d %7d %7d %7d %7d %7d\n",
           command[pid], pid,
           @count(allocation[pid]), @count(free[pid]),
           @count(anon_fault[pid]), @count(anon_usrfree[pid]),
           @count(anon_pgin[pid]), @count(anon_cow[pid]),
           @count(anon_unmap[pid]))
}
