> Hi. I have a computer based on a Tyan Tiger i7501 motherboard, which
> hosts two 2GHz Xeons with Hyperthreading. ntpd won't sync on it. I've
> tried changing the kern.timecounter.hardware from ACPI-Fast (the
> default) to TSC and i8254.
>
> It appears to work marginally better when set to i8254, but it still
> doesn't sync. The jitter figure from "ntpq -p" seems to stabilize in
> the mid 50s, when kern.timecounter.hardware is set to ACPI-Fast. The
> synch distance figure from "ntptrace" seems to grow without bound.
>
> Anyone have any ideas? I'd be happy to provide any further information
> necessary. This machine is my file server, and I would really like for
> it to have its clock run accurately.
How many NTP servers do you have configured? I scratched my head
a long time for a similar issue a while back, and if I recall
correctly, ntpd now really, *really*, wants 3 (?) or more NTP
servers before disciplining the local clock.
Regards,
- Håvard