Re: AMD Quad Core clock problem?

[Bart Van Assche]

On Sat, Apr 12, 2008 at 12:09 AM, Marc Perkel <mperkel@xxxxxxxxx> wrote:
>
>  Is it possible due to calibration that ntpd isn't able
>  to correct the problem? Is there a setting to make ntp
>  more agressive?

Clock crystals typically have an error between 20 and 200 ppm. ntpd
can correct clock crystal errors of maximum 500 ppm. If I remember
correctly the kernel limits frequency adjustments to 512 ppm. It's not
a good idea to try to change this limit -- large clock crystal errors
slow down convergence of ntpd's algorithms significantly.

Bart.
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