[ntp:questions] Getting NTP to correct only the clock skew

Spoon devnull at ntp.isc.org
Sat Apr 14 08:54:54 UTC 2007

Brian Debelius wrote:

> Spoon wrote:
>> The very hard part (for me) is seeing that B's buffer is in fact slowly 
>> draining when there is a lot of jitter on the link between A and B.
>> I've tried using an exponentially-weighted moving average to filter the 
>> jitter out, but it didn't work as well as I had hoped. That is when I 
>> turned to NTP. I'm trying not to reinvent the wheel.
>> Are you saying I should use the theory in NTP but not the daemon?
> Have you seen this?
> http://cr.yp.to/clockspeed.html

clockspeed uses a hardware tick counter to compensate for a persistently 
fast or slow system clock. Given a few time measurements from a reliable 
source, it computes and then eliminates the clock skew.

Why should I use clockspeed over ntpd?

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