[coyotos-dev] SMP: transmap experiment, questions

[Jonathan S. Shapiro]

On Wed, 2007-10-24 at 13:09 -0400, Jeroen Visser wrote:
> > >
> > > Not sure about the performance implications though. It sure
> obsoletes
> > > a lot of mapping complexity.
> >
> > Performance of this should all be fine. The important point is that
> no
> > two CPUs *ever* share a transmap entry, so transmap entries never
> > require an IPI for shoot-down.
> 
> No data cache *lines* shared in transmap code paths. I now understand.

Yes. But also no TLB entries appearing on anything other than the local
CPU.

shap
-- 
Jonathan S. Shapiro, Ph.D.
Managing Director
The EROS Group, LLC
www.coyotos.org, www.eros-os.org