chronyd does a good job of keeping the time in sync without big changes in the drift (freuquency).
But there are a few situations, where an “aggressive mode” (i.e. drastically increasing the frequency) would be more appropriate: (1) at start (2) when there is a big time-error (ntp-time - cpu-time) (e.g. > 2 sec) (3) (at least on macOS) when the computer wakes up from sleep. (1) my computer usually runs for months without shut-down or reboot. So maybe chronyd already does the right thing in this situation. (2) I have seen rather big frequencies (up to 20-fold of normal drift resulting from a time-error of 45 sec). So this case also seems to be handled ok. (3) On macOS there is usually a time-error of -1 … +2 seconds upon wake up. (rarely more than 2 sec) (this is only true with rtcsync working). The problem here: when chronyd thinks that all is stable, the next check with ntp might by delayed by up to 17 min (sometime up to 53 min). And for usual errors < 2 sec, case (2) does not apply. This results in almost an hour (depending of course on the wake-up error) until the time is correct again. Here I would like to see an “aggressive mode” until the time-error is down to a few msec. Would this be possible? Or are there reasons, why this is *not* a good idea? Gerriet. -- To unsubscribe email chrony-dev-requ...@chrony.tuxfamily.org with "unsubscribe" in the subject. For help email chrony-dev-requ...@chrony.tuxfamily.org with "help" in the subject. Trouble? Email listmas...@chrony.tuxfamily.org.
