On 06/30/2019 09:45 PM, Andrew Gierth wrote:
"rihad" == rihad <rihad@xxxxxxx> writes:
rihad> There's a weird problem, even when the time is initially set by
rihad> openntpd it keeps lagging by one second every few seconds:
rihad> $ sudo /usr/local/etc/rc.d/openntpd restart
What OS is this?
I've seen this kind of thing with FreeBSD where the kernel timecounter
source has been chosen badly (i.e. choosing TSC when the TSC isn't
actually invariant enough). Forcing TSC not to be used fixes it. The
configuration I've especially noticed it on is when running in a VM with
a single virtual CPU.
Exactly. You're right. It's on FreeBSD 11.2. After some googling earlier
I changed kern.timecounter.hardware=HPET and solved the problem. The
default chosen value TSC-low seems to misbehave for this box, although
it works on others (running the same FreeBSD version).
