990  (counts @100 nsec - 99 usec max)
  1000000  (counts @100 nsec -100 msec max)
      500  (counts @100 nsec - 50 usec max)
      990  (counts @100 nsec - 99 usec max)
  +   990  (counts @100 nsec - 99 usec max)
  --------
  1003470