Hi,

>     The clock on my SS5/110, running 1.5S, drifts constantly, but only
when the
>    machine is busy (that is, only when I'm at work using it). I've
included
>    several days worth of NTP logs below, showing drifts of several
seconds an
>    hour, but not at night and not over the weekend. Is this normal? Does
my clock
>    just suck? Is it a Sun hardware thing?
>
> That seems to be a common problem with recent kernels.  They appear to
> lose clock interrupts.  Maybe other interrupts as well.

I get FIFO overruns on zs devices on SS2 and Classic systems under
load.  Could this be caused by unhandled interrupts too?  I have
minor clock drift too, but nothing unexpected.

BTW - I dont know huge amounts about those Zilog devices, so this
may be irrelevant :p

HtH,

- Chris