[ntp:questions] Re: ntpd Frequency (drift) Jumps
David J Taylor
david-taylor at blueyonder.co.not-this-bit.nor-this-part.uk
Sun Jul 2 10:46:29 UTC 2006
Charles Elliott wrote:
> I just started using ntpd. It seems to be most accurate in terms of
> the offset remaining in the range [-10, 10] ms when the frequency
> drift is -41.xxx. However, every now and then, for no apparent reason,
> the
> frequency will jump +- 50 to 100 PPM. When it does, the offset
> increases greatly in magnitude, becomes wildly erratic, and ntpd
> adjustes the clock frequently. In a day or so ntpd will slowly
> reduce the drift to -4y.xxx, then
> it will start the cycle again. I am using ntpd 4.2.0b from
> ntp-4.2.0b at 1.1436mbg-xmas-o-win32-setup.exe. Has anyone else
> noticed this behavior? Do you know of a remedy?
>
> C Elliott
Do you have the Multi-Media timer option set? It was critical to getting
good stability with my systems:
http://www.david-taylor.myby.co.uk/ntp/ntp-events.htm#glitch
David
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