Getting message: Unknown HZ value! (1654), apparently in libc? ia64

[Walter Tautz <wtautz@math.uwaterloo.ca>]

>  
>  Unknown HZ value! (1654) Assume 1024.
>  
>  

# uptime 
Unknown HZ value! (1596) Assume 1024.
 08:45:29 up 21 days, 17:20,  1 user,  load average: 4.99, 4.97, 4.91



  % strings -a -2 /usr/lib/libc.a | grep -i hz
  (Hz)
  Hz
  HZ

So I would guess it's something in 
libc that is anonymously spewing this cryptic message.
apparently HZ has something to do with clocks per second.