[ntp:hackers] Is this normal?
clemens at dwf.com
clemens at dwf.com
Tue May 6 03:27:32 UTC 2008
My memory tells me that I haven't seen this behavior before, but it won't
be the first time Ive called wolf for a behavior in ntp that has been there
all the time.
The ONCORE driver prints the times of the timehacks (there's got to be
a better word) to the clockstats file.
>From that data you can watch the timehacks bounce around a central
value, or better yet plot that value.
When I restart ntpd, there is usually a fraction of a second error in the
clock, and I would EXPECT that difference to be reduced to ZERO in
a short period of time. My recollection is that watching ntpdc, the reach
would climb from 0 -> 377, and there would be a delta in the offset,
followed by the reach being zeroed, and the sequence repeating.
The offset was reduced to zero in no time at all.
What I am seeing at the moment is a several hour (3 or 4) more or less
exponential decay of the offset from some large value to zero.
Is this normal?
Either its been there all along and I don't remember it, or this is
a new feature. Ive tried both the 4.2.4p4 and the 4.2.5p113 releases
of ntp and see basically the same thing.
Puzzled.
--
Reg.Clemens
reg at dwf.com
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