High-resolution clock

[Henning Schulzrinne]

For some networking experiments, we need a fairly high-resolution clock
(sub-millisecond). I would be interested in

o  how does the clock work (interrupt driven? hardware register? other?)
o  experiences with the built-in timing mechanisms (resolution, 
   variability due to interrupt latencies and who knows what)
o  any add-on devices/software
   (even a cheap and fast parallel interface would do)

Thanks.

Henning Schulzrinne  (HGSCHULZ at CS.UMASS.EDU)
Department of Electrical and Computer Engineering
University of Massachusetts at Amherst
Amherst, MA 01003 - USA === phone: +1 (413) 545-3179 (EST); FAX: (413) 545-1249