Hans Jørgen Jakobsen wrote: > Dmitry Ivanov wrote: > >> Spoon wrote: >> >>> I've noticed something I find very strange on the systems I have to >>> work with. Every time I reboot the computer, the clock skew of the local >>> clock changes, sometimes by what seems to be a huge amount. >>> >>> For example, I boot the computer, let ntpd run for 12 hours, and the >>> value recorded in the drift file is 35 ppm. I reboot the computer, let >>> ntpd run for 12 hours, and I get 5 ppm... >> >> I see the same behaviour on many systems. Looks like common problem. > > Could it be that some systems at reboot try to calibrate the clock > (whatever that might be) relative to the TOD chip? > On some systems the TOD chip has the lowest frequency offset > and this would on systems not runing NTP lead to a system drifting less. > But it's poison for the value in the driftfile.
# dmesg | grep -i calib Calibrating delay using timer specific routine.. 2535.15 BogoMIPS (lpj=12675781) Are you referring to this calibration? (I run Linux 2.6.20.3-rt8) I'll check the source code to find where this message comes from. Regards. _______________________________________________ questions mailing list [email protected] https://lists.ntp.isc.org/mailman/listinfo/questions
