[ntp:questions] drift modeling question

Hal Murray hal-usenet at ip-64-139-1-69.sjc.megapath.net
Fri Jul 11 17:29:53 UTC 2008

In article <tYudnaaRSP7_C-rVnZ2dnUVZ_hqdnZ2d at nethere.com>,
 shy author <shy.author.not at aol.com> writes:
>Has anyone thought about removing both the linear terms and quadratic 
>terms in the drift, by utilizing the temperature sensor readings 
>available on many of the latest motherboards?

Linear works pretty well.  I think it would be hard to get quadratic.

  NTP temperature compensation
  Mark Martinec, 2001-01-08

>Just a thought, but it seems a shame that we're not taking advantage of 
>the thermal data available to us, when correcting for clock drift and 
>simply using a linear correction.

The temperature sensor is probably in the CPU chip.  You probably
want it on the crystal.  The sensors on CPUs tend to be coarse.

These are my opinions, not necessarily my employer's.  I hate spam.

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