Re: [ANNOUNCE][RFC] PlugSched-6.4 for 2.6.18-rc2

From: Al Boldi
Date: Wed Jul 26 2006 - 00:42:34 EST

Valdis.Kletnieks@xxxxxx wrote:
> On Tue, 25 Jul 2006 21:27:14 +0300, Al Boldi said:
> > Peter Williams wrote:
> > > It's probably not a good idea to have different schedulers managing
> > > the same resource. The way to do different scheduling per process is
> > > to use the scheduling policy mechanism i.e. SCHED_FIFO, SCHED_RR, etc.
> > > (possibly extended) within each scheduler. On the other hand, on an
> > > SMP system, having a different scheduler on each run queue (or sub set
> > > of queues) might be interesting :-).
> >
> > What's wrong with multiple run-queues on UP?
> On an SMP system, you can have one CPU doing one class of scheduling (long
> timeslice for computational, for example), while another CPU is dedicated
> to doing RT scheduling, and so on. It's not clear to me that "different
> classes per CPU" makes any real sense on a UP....

Conceptually there should be no difference between UP and MP.

Think HyperThreading.



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