I ran into a weird problem last week while trying to measure timing accuracy, and I can’t see anyone else having a similar problem on the Internet. It feels like a kind of fundamental problem, not just a small bug, so I figured I’d write something up for posterity. There are two main protocols for syncing high-accuracy time to servers over the network today: NTP and PTP. NTP is kind of the old standby.Originally from 1985, although it’s been updated repeatedly over the years. Originally...