[ntp:questions] Re: PPS sync: astonishing offset
Fabien Ribes
FribesAT at CapGeminiDOT.fr
Mon Oct 6 16:28:08 UTC 2003
Dear Hans,
Some more info:
It has been observed with ntp 4.1.0, running on linux 2.4.10.
It was running for days, with a drift file. As it is an embedded system
, I can't turn on peerstat and loopstat easely.
Hans Jørgen Jakobsen wrote:
> On Mon, 06 Oct 2003 16:53:30 +0200, Fabien Ribes wrote:
>
>>hi all,
>>
>>On a router synchronized to a Trimble GPS receiver I'm getting the
>>following results with ntpq:
>>
>>Fri Oct 3 02:24:43 GMT 2003
>>remote refid st t when poll reach delay offset disp
>>=========================================================================
>>+127.127.29.0 .GPS. 0 l 20 32 377 0.00 -0.065 0.49
>>o127.127.22.0 .PPS. 0 l - 16 377 0.00 -0.209 0.24
>>
>>which is OK for me, but one minute later, I get :
>>
>>Fri Oct 3 02:25:59 GMT 2003
>>remote refid st t when poll reach delay offset disp
>>=========================================================================
>>+127.127.29.0 .GPS. 0 l 2 32 377 0.00 -3.713 0.47
>>o127.127.22.0 .PPS. 0 l 2 16 377 0.00 -4.459 0.24
>>
>>which makes me a bit puzzled, as many other equipments in the same
>>configuration are very stable. Any idea ?
>>
>
> More data please. Enable peerstat (and loopstat) to get better view of the
> problem. What OS? What ntp-version? How long has it been running?
> Do you have a drift-file?
> /hjj
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