Yo Achim! On Fri, 17 May 2019 20:53:58 +0200 Achim Gratz via devel <devel@ntpsec.org> wrote:
> Hal Murray via devel writes: > >> I'm not going to look at that stuff on YouTube… any link to > >> oldfashioned non-multimedia? > > > > Here is a Usenix paper that covers the same ground: > > https://www.usenix.org/system/files/conference/nsdi18/nsdi18-geng.pdf > > Ah, OK; the Huygens folks again. That algorithm very much relies on > the symmetry of the links, so for general NTP application it would > need to be substantially revised. Yes, but some good ideas in there. I liked that the probes to a chimer come in pairs with a defined delay between the first and second probe. If the probes come back with a similar inter-packet delay, then the probes are used. If the delay is skewed then the pair are discarded and retried. The effect is that packets sent/received during interrupts, buffer bloat, etc. can be discarded. Leaving the remaing packets that have better time properties. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 g...@rellim.com Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can’t measure it, you can’t improve it." - Lord Kelvin
pgpTEivv4wkRD.pgp
Description: OpenPGP digital signature
_______________________________________________ devel mailing list devel@ntpsec.org http://lists.ntpsec.org/mailman/listinfo/devel
