From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!news.eternal-september.org!mx02.eternal-september.org!feeder.eternal-september.org!gandalf.srv.welterde.de!news.jacob-sparre.dk!loke.jacob-sparre.dk!pnx.dk!.POSTED!not-for-mail From: Jacob Sparre Andersen Newsgroups: comp.lang.ada Subject: Re: how to analyze clock drift Date: Wed, 19 Nov 2014 11:30:12 +0100 Organization: Jacob Sparre Andersen Research & Innovation Message-ID: <87sihf32kr.fsf@adaheads.sparre-andersen.dk> References: <87bno4gnuz.fsf@debian.uxu> <87k32s3ppt.fsf@debian.uxu> NNTP-Posting-Host: 109.56.62.246.mobile.3.dk Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: loke.gir.dk 1416393013 11155 109.56.62.246 (19 Nov 2014 10:30:13 GMT) X-Complaints-To: news@jacob-sparre.dk NNTP-Posting-Date: Wed, 19 Nov 2014 10:30:13 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux) Cancel-Lock: sha1:3aQr2hVUXzVqATvmi9gzsCSpz0k= Xref: news.eternal-september.org comp.lang.ada:23547 Date: 2014-11-19T11:30:12+01:00 List-Id: Emanuel Berg wrote: > http://user.it.uu.se/~embe8573/hs-linux/src/tick_times.log Try to subtract a linear fit and plot the result. There may be a short-term systematic pattern, but over longer time, it looks like you have a slowly, randomly drifting function. Greetings, Jacob -- "If it's a mess, hide it..." -- J-P. Rosen