global count;
probe kernel.function("__wake_up_common")
{
  count++
  if (count <= 8)
    { system("echo sleeping") }
  else if (count <= 16)
    { warn("wake_up") }
  else if (count <= 24)
    { error("wake_down") }
  else
    { printf("count: %d\n", count); exit() }
}
