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From: Emanuel Berg <embe8573@student.uu.se>
Newsgroups: comp.lang.ada
Subject: Re: how to analyze clock drift
Date: Wed, 19 Nov 2014 03:37:21 +0100
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Date: 2014-11-19T03:37:21+01:00
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Simon Clubley
<clubley@remove_me.eisner.decus.org-Earth.UFP> writes:

>> I have a long list of samples of clock readings. It
>> "should" be periodical, by 1 ms, but of course it
>> isn't. The data is in nanoseconds.
>>
>
> How are you gathering the data?

There is a C++ program. It uses the sleep_until
function to control the "1 ms" period. Then time is
dumped using other C++ methods.

No, the isn't the correct time. That is the whole
idea. It isn't correct, but in what ways is it
incorrect - does it drift? does it average out? does
it drift but evenly, i.e. the drift doesn't drift?
etc.

I want to answer such questions (and others) if
possible with math/stat methods and a large set of
data, but I'm not a star in science, I do tool
programming, so I thought you can help me, and I can
program, and it'll be interesting... :)

Here is everything - including docs, even a man page:

    http://user.it.uu.se/~embe8573/hs-linux/

-- 
underground experts united