On Wed, 20 Nov 2002, Dave Huang wrote:

> On Wed, 20 Nov 2002, David Gatwood wrote:
> > As an added note, certain drivers that don't block for a long period of
> > time and need low latency (the ADB driver comes to mind) should probably
> > be handled directly as it is now.  Depending on the IPL of the ADB
> > hardware, this might even improve perceived responsiveness on the console.
> 
> Sounds great to me :) Another device that needs its interrupts to be
> handled promptly is the serial port; I seem to recall that we can keep
> up with 57600 baud as long as there's no disk access (it's been a while
> since I've used the serial port though, so I may be recalling
> incorrectly :). Maybe with your changes, we'll be able to do the same
> even with disk I/O going on?

That's the theory.  The effect should be equivalent to bumping disk I/O to
a lower IRQ without actually rewiring the hardware....


Later,
David

---------------------------------------------------------------------
David A. Gatwood                                dgatwood@gatwood.net
Developer Docs Writer                             dgatwood@apple.com
Apple Computer                                  dgatwood@mklinux.org

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