ntpd won't sync

[Sridhar Ayengar <sridhar%ikickass.org@localhost>]

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.

Peace...  Sridhar