On Wed, Mar 31, 2010 at 22:32 UTC, Dreamy <[email protected]> wrote: > http://www.pool.ntp.org/scores/193.87.160.18/graph/offset.png > > Sine wave? Is that normal thing? Should that mean something for me? > Should I sync to different servers? Or should I forget this server to > be ntp at all?
I've seen that before. It's not just that it oscillates like a sine wave that catches my eye. The oscillations are increasing each cycle until your offset exceeds 128ms, at which point ntpd steps your clock and the oscillation amplitude shrinks suddenly, then starts working back up towards 128ms. I'm going to guess you're using Linux, and that disabling the kernel loop discipline will cure it. Try "disable kernel" in the ntp.conf and see if the behavior improves. I don't remember the details, but there was a problem with the kernel loop interface on Linux not long ago that manifested like this. Basically the loop discipline is broken because there is a factor of 4 (2**2) difference between ntpd's idea of the polling interval and the kernel code's idea, IIRC. Good luck, Dave Hart _______________________________________________ timekeepers mailing list [email protected] https://fortytwo.ch/mailman/cgi-bin/listinfo/timekeepers
