Re:QoS research (Score 1)

I also worked on Nemesis and agree with what Michael says. It was far from perfect in implementation, but the whole point was to demonstrate the principles of providing QoS, not provide a particularly polished final system (really, the whole point of any kind of research). It would be a complete waste of time and money to implement drivers for every device under the sun!

As Michael pointed out, Nemesis uses a completely different architecture to most other operating systems (ie. migrating OS code into applications) to allow it achieve QoS. You simply cannot do this with a UNIX variant, because you are still relying on time in the kernel (or shared servers) to some of the work that should be accounted to you.

Just for interest, Nemesis is now available for download at Sourceforge. You can also download the packages from Glasgow (one of the partner sites) here.