[ntp:questions] Odd (mis)behavior when reference clock fails

Unruh unruh-spam at physics.ubc.ca
Wed Sep 24 05:54:56 UTC 2008


"David J Taylor" <david-taylor at blueyonder.neither-this-part.nor-this-bit.co.uk> writes:

>Unruh wrote:
>[]
>> Overdrifting does not seem to be the problem as in his recent post.
>> His drift of 5ms in a day is only .1PPM. ntp should be able to handle
>> that easily and it indicates some other problem. And that is less
>> than one lost tick per day, if that were theproblem. Strange.

>He also said: "Time is very stable and I see the drift at 93.576 ppm."

I was refering to the excess drift he was seeing when his clock became
"unsynchronized" It is tiny. If the real drift rate were over 500PPM I sure
would not expect it to 500.06 PPM. Ie, all evidence is that this is NOT due
to an overdrift. Or timer tick loss.




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