David Seifert wrote:
> 
> > what we really want is some way to give the userland process
> > enough priority that it's going to get the time it needs even on
> > a heavily loaded system.
> 
> Given recent trends in applications, I've been thinking that most
> OSes will need to become real-time.
> 
> -Dave

You may be interested in looking at the Nemesis OS at

http://www.cl.cam.ac.uk/Research/SRG/pegasus/nemesis.html

Patrick