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

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.

-Andrew


 cpu0:  [075.3] d0-0[075.3]
 cpu1:  [075.3] d0-1[075.3]
 cpu2:  [075.3] d0-2[075.3]
 cpu3:  [074.8] d0-3[074.8]


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