On 2013-12-19, David Lord <[email protected]> wrote: > Adrian P wrote: > > ..... > >> Everywhere is written that FreeBSD is the best OS for time keeper, >> since its kernel supports nanosecond accuracies. However, if GPS 18x >> LVC PPS signal has only microsecond accuracy, then I suppose there is >> no point on using FreeBSD, any linux would be okay as well. So what do >> you think, looking from NTP point of view only, is this nanosecond >> accuracy the only reason why someone would use FreeBSD, or there are >> some other reasons as well? I see you have experience with all kind of >> OSes. > > I think the combination of hardware used is at least as important > as the OS. > ><http://www.febo.com/pages/soekris/> 100ns accuracy
AGreed. But their comparison is strongly cooked. At least on my system, the serial port interrupt performace is far better than theirs-- something like 2 us, not the 50us they are showing. Certainly 100ns is better, but more like one order of magnitude, not more than 2. > ><http://www.synclab.org/radclock/> An alternative to ntpd > > > > David _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
