On Sat, Oct 30, 2010 at 09:09:17AM -0700, Chuck Swiger wrote: > http://www.ece.udel.edu/~mills/database/papers/nano/nano.pdf > > "In operation, PLL mode is preferred at small update intervals and > time constants and FLL mode at large intervals and time constants. > The optimum crossover point between the PLL and FLL modes, as > determined by simulation and analysis, is the Allan intercept. As a > compromise, the PLL/FLL algorithm operates in PLL mode for update > intervals of 256 s and smaller and in FLL mode for intervals of 1024 > s and larger. Between 256 s and 1024 s the mode is specified by the > API. This behavior parallels the NTP daemon behavior, except that in > the latter the weight given the FLL prediction is linearly > interpolated from zero at 256 s to unity at 1024 s."
Is there a reason why ntpd doesn't make use of the STA_FLL flag? I think it would be nice if ntpd switched the FLL limit to 256 s with tinker allan 8 or lower. -- Miroslav Lichvar _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
