Re: sched domains kernbench improvements

[Nick Piggin]

Con Kolivas wrote:

> On Sat, 28 Feb 2004 22:15, Nick Piggin wrote:
>
> > Con Kolivas wrote:
> >
> > > Hi Nick
> > >
> > >
> > > > So it is more a matter of tuning than anything fundamental
> > > Geez I know how you feel... :-D
> > >
> > >
> > > I tried it on the X440 with sched smt disabled
> > >
> > > better than before but still slower than vanilla on half load; however
> > > better than vanilla on optimal and full load now! I wonder whether the
> > > worse result on half load is as relevant since this is 8x HT cpus?
> > Thanks. Yep the drop off at half load is to be expected with
> > CONFIG_SCHED_SMT turned off.
>
> Will this affect the SCHED_SMT performance and should I do a round of benchies 
> with this enabled?

It will as far as balancing between physical CPUs, yes. It probably
doesn't make quite a big difference because it is less of a problem
if one sibling goes idle than if one CPU (in the 8-way) goes idle).

But if you could do a round with SCHED_SMT enabled it would be very
nice of you ;)

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