On Wed, Nov 15, 2006 at 07:57:17PM +0100, Hauke Fath wrote:
> The '030 Macs have an interrupt hierarchy where the timer interrupts
> have a low priority, which means that ticks get lost as soon as there
> is any significant I/O load. The Quadra 700 and later '040 Macs can be
> switched to a different hierarchy which gives the timer interrupts
> higher priority.  Apple apparently learned from its A/UX experiences.

I always wondered which device drivers were worst about not letting
clock ticks run, and seeing if there were ways to "flash" in the driver
to let the clock ticks update.

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | agrier@poofygoof.com
              "silly brewer, saaz are for pils!"  --  virt