Messages in this thread | | | Date | Sun, 13 Apr 2008 10:19:22 +0200 | From | "Bart Van Assche" <> | Subject | Re: AMD Quad Core clock problem? |
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On Sat, Apr 12, 2008 at 12:09 AM, Marc Perkel <mperkel@yahoo.com> 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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