On Wed, 25 May 2005, Joerg Sommer wrote:
> Does anyone know where this drift comes from?
It could be just a miscalulation by the kernal as to how fast it
thinks the CPU is. The kernel isn't perfect.
Anyway, your drift problem is nothing. I initially had a drift
of about 10 seconds per hour for my Mac Mini. (My hardware
clock was correct.)
You can help NTP out by adjusting the TICK value in
/etc/default/adjtimex. I figured out the correct value by:
1. Shut down ntpd.
2. On the hour, set the system clock to match the
hardware clock.
3. Wait 1 hour.
4. Examine the system clock and note the difference.
In my case, a good value for TICK is 10028. Now the drift is
small enough that ntpd can handle it.
- Paul
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