Hello, On Thursday, April 3, 2008 at 16:25:17 +0200, Noob wrote:
> STA_UNSYNC (0x0040, clock unsynchronized) is 0. [...] Thus the kernel > should write the system time to the RTC every 11 minutes; but it does > not. Fine! Don't touch anything, happy man, or it might well "tomber en marche". Real men don't want the eleven-minutes mode. It is not only extremely inaccurate by itself, but it also steps on the toes of those tools that are able to manage the RTC properly. I previously posted some figures, comparing the accuracy of writing the RTC (not counting drift). Mean offset and dispersion: - eleven-minutes mode: -2150 µs +-5000 - hwclock util-linux-ng 2.13.1: -2500 µs +-170 - hwclock 2.32 from BJH: 0 µs +-10 Furthermore both hwclocks are able to evaluate and compensate the drift of the RTC. The eleven-minutes mode cannot do that, and instead it can perturbate hwclock's calculations. Serge. -- Serge point Bets arobase laposte point net _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions