"David J Taylor" <[email protected]> writes:
>Unruh wrote: >[] >> Maybe when someone finally put refclock support into chrony you will >> have >> your wish. >Not until it runs under Windows. Fair enough. >> It sounds like your temp changes causing rate changes on a >> scale >> that ntp cannot properly cope with. (ntp is terrible at coping with >> changes-- a purposeful design decision by Mills). I get about 3-5 >> usec as >> average offset, but the freq changes are only about .1PPM , not 3PPM. >> The >> room is not particularly air conditioned, but the temp variations >> over the >> day are probably less than 5C not 20C. >Here it's probably a variation of at least 10C. The computer CPU use >itself is fairly constant throughout the day, so it may well track ambient >temperature: > http://www.satsignal.eu/mrtg/performance_feenix.php >Another PC in the same room running a FreeBSD system has about half the >jitter, but far less offset - PC Pixie at the top: > http://www.satsignal.eu/mrtg/performance_ntp.php That looks much more like the kind of timing I get on my Linux system. driven by a PPS from a Garmin 18LVC. I assume that the rate is also far more constant on that system. >I recall trying some of the motherboard temperature monitoring software, >but probably not for that PC. I'll look again. >David _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
