[ntp:questions] stepping and slewing

Serge Bets serge.bets at NOSPAM.laposte.invalid
Sat May 12 21:56:00 UTC 2007

 On Wednesday, May 9, 2007 at 0:13:03 +0200, Serge Bets wrote:

> Slewing 30 ms at 500 PPM should take exactly 60 seconds, right?
> I monitored with repeated ntpdate -q until zero offset:
>  - ntpdate took 60 seconds.

Correction: ntpdate took 60 seconds to cross the zero offset. But it
continued slewing for 30 more seconds, ending at a -15 ms offset.
Looking at the source, this overshoot is a feature.

Serge point Bets arobase laposte point net

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