http://www.perlmonks.org?node_id=1162358


in reply to Re^3: Time::HiRes gettimeofday producing timestamps out of order
in thread Time::HiRes gettimeofday producing timestamps out of order

Thanks again. Will look into it. I *thought* ntpd was careful to avoid large changes in updating the clock, but maybe not careful enough.

Update: Ubuntu docs:

The ntp daemon ntpd calculates the drift of your system clock and cont +inuously adjusts it, so there are no large corrections that could lea +d to inconsistent logs for instance.
Hm. Define "large" ...


The way forward always starts with a minimal test.