Re: [Xen-devel] Re: IDLE domain is scheduled more than dom0

On Friday 08 July 2005 11:33, Andrew Theurer wrote:
> On Friday 08 July 2005 09:53, Dan Magenheimer wrote:
> > >   Shouldn't IDLE domain not be scheduled for most time? Because
> > > idle task will call into PAL for power save on XEN/IA64, the
> > > performance is really, really bad to boot Dom0. The net effect is
> > > about ten times slower. After adding "sched=bvt", everything back
> > > to normal.
> >
> > If the sedf scheduler is scheduling the idle domain when
> > domain0 is runnable, surely this is affecting performance
> > on x86 also and is a bug that should be fixed?
> >
> > Has anyone done any performance testing (on x86) since
> > sedf was checked in as the default?
>
> Just tried launching some cpu bound tasks in dom0, and I get only 75%
> cpu util for dom0.  I'll try the other domain scheduler and see if it
> clears it up.

OK, just confirmed bvt works as expected in ia32.

-Andrew

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