[ntp:questions] Re: time reset, syncronisation lost and Large PPM values

Tom Smith smith at cag.zko.hp.com
Tue Nov 1 13:14:49 UTC 2005


tor wrote:
> 
> I still get 2 resets an hour (depending on load ?), synchronisation lost and
> a large frequency (512 ppm).
> If I read the log correctly then "kernel time dicipline status change 1"
> means the kernel is now adjusting the hardware clock.
> 
> Nov  1 04:45:45 lv-lomur ntpd: ntpd shutdown succeeded
> Nov  1 04:45:46 lv-lomur ntpdate[12129]: step time server 172.17.2.71 offset
> 0.540713 sec
> Nov  1 04:45:46 lv-lomur ntpd:  succeeded
> Nov  1 04:45:46 lv-lomur ntpd[12133]: ntpd 4.1.2 at 1.892 Thu Sep 11 05:38:15
> EDT 2003 (1)
> Nov  1 04:45:46 lv-lomur ntpd: ntpd startup succeeded
> Nov  1 04:45:46 lv-lomur ntpd[12133]: precision = 9 usec
> Nov  1 04:45:46 lv-lomur ntpd[12133]: kernel time discipline status 0040
> Nov  1 04:45:46 lv-lomur ntpd[12133]: frequency initialized 0.000 from
> /var/lib/ntp/drift
> Nov  1 04:46:29 lv-lomur ntpd[12133]: kernel time discipline status change
> 41
> Nov  1 04:47:31 lv-lomur ntpd[12133]: kernel time discipline status change 1
> Nov  1 05:21:53 lv-lomur ntpd[12133]: time reset 1.033389 s
> Nov  1 05:21:53 lv-lomur ntpd[12133]: synchronisation lost
> 
> Now ntptime now show an offsett of 0.000us and the frequency is 512.00 ppm.
> :-(
> The adjtime was unchanged
> The driftfile has been updated - to the maximum value (500.000)
> 

It's losing time, which could suggest lost interrupts. However,
the steps every half hour make me wonder if your server is doing the
stepping. The fact that 2 different clients have the same problem
in any case suggests a common cause. What is/are the server(s)?
It's not a Windows "NTP server", is it?

-Tom




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