#!/usr/bin/stap

global traced_pid, command
global reclaims, direct_reclaims, freed
global reactivate, deactivate, pgout
global t_reclaims, t_direct_reclaims, t_freed
global t_reactivate, t_deactivate, t_pgout

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

probe kernel.trace("mm_directreclaim_reclaimall") {
  if (!log_event()) next
  direct_reclaims[pid()] <<< 1
  t_direct_reclaims <<< 1
}

probe kernel.trace("mm_pagereclaim_shrinkinactive") {
  if (!log_event()) next
  reclaims[pid()] += $reclaimed
  t_reclaims += $reclaimed
  command[pid()] = execname()
}

probe kernel.trace("mm_pagereclaim_free") {
  if (!log_event()) next
  freed[pid()] <<< 1
  t_freed <<< 1
}

probe kernel.trace("mm_pagereclaim_pgout") {
  if (!log_event()) next
  pgout[pid()] <<< 1
  t_pgout <<< 1
}

probe kernel.trace("mm_pagereclaim_shrinkactive_a2a"),
      kernel.trace("mm_pagereclaim_shrinkinactive_i2a") {
  if (!log_event()) next
  reactivate[pid()] <<< 1
  t_reactivate <<< 1
}

probe kernel.trace("mm_pagereclaim_shrinkactive_a2i"),
      kernel.trace("mm_pagereclaim_shrinkinactive_i2i") {
  if (!log_event()) next
  deactivate[pid()] <<< 1
  t_deactivate <<< 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 %8s %8s %10s %8s %8s\n",
         "Command", "Pid", "Direct", "Activate", "Deactive",
         "Reclaims", "Pgout", "Freed")
  printf("%-16s %6s %8s %8s %8s %10s %8s %8s\n",
         "-------", "-----", "------", "--------", "--------",
         "-----", "-----", "-----")
  foreach (pid in reclaims-)
    printf("%-16s %6d %8d %8d %8d %10d %8d %8d\n",
           command[pid], pid,
           @count(direct_reclaims[pid]), @count(reactivate[pid]),
           @count(deactivate[pid]), reclaims[pid],
           @count(pgout[pid]), @count(freed[pid]))
  printf("\n")
  printf("%-23s %8d %8d %8d %10d %8d %8d\n", "Totals",
         @count(t_direct_reclaims), @count(t_reactivate),
         @count(t_deactivate), t_reclaims,
         @count(t_pgout), @count(t_freed))
}