Am 16.12.2014 um 14:07 schrieb Michael Biebl: > Am 16.12.2014 um 04:45 schrieb Jos van Wolput: >> Package: systemd >> Version: 215-8 and 218-1 >> Severity: normal >> >> Dear Maintainer, >> >> Systemd-timesyncd syncs time about once per 60 seconds. > > What makes you think systemd-timesync syncs the clock once every 60 seconds?
I just studied the code and timesyncd starts with a minimal 32 second interval (NTP_POLL_INTERVAL_MIN_SEC) which is increased until it reaches the maximum 2048 second polling interval (NTP_POLL_INTERVAL_MAX_SEC). It seems to use an exponential like back-off algorithm as shown by the journal > Dez 16 14:07:41 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 32s/+0.253s/0.028s/0.000s/+500ppm > Dez 16 14:08:13 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 64s/-0.005s/0.025s/0.002s/+460ppm > Dez 16 14:09:17 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 128s/-0.022s/0.040s/0.008s/+373ppm > Dez 16 14:11:25 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 128s/-0.053s/0.024s/0.050s/+165ppm > Dez 16 14:13:33 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 256s/+0.030s/0.124s/0.055s/+165ppm (ignored) > Dez 16 14:17:50 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 256s/-0.056s/0.026s/0.052s/+55ppm > Dez 16 14:22:06 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 512s/-0.012s/0.025s/0.050s/+43ppm > Dez 16 14:30:38 pluto systemd-timesyncd[12409]: > interval/delta/delay/jitter/drift 1024s/+0.046s/0.149s/0.059s/+43ppm (ignored) roughly 30s -> 1m, 1m -> 2m, 2m -> 4m, 4m -> 8m ... This looks like a sensible approach to me. -- Why is it that all of the instruments seeking intelligent life in the universe are pointed away from Earth?
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