[rescue] pursuing a VAX

[vance at neurotica.com]

On Wed, 11 Dec 2002, Joshua Snyder wrote:

> On Tue, 10 Dec 2002, Joshua D Boyd wrote:
>
> > On Tue, Dec 10, 2002 at 02:06:33AM -0500, Joshua Snyder wrote:
> >
> > > Not sure if any of it is true but seems to make sense when thinking about
> > > adding SMT to the P4, you want to have wide issue cpu so the threads have
> > > plenty of resources.  As it is now it seems like best reason to enable
> > > SMT(no I am not going to call it hyper-threading... ) on the P4 is to make
> > > up for the poor utilization caused by the long pipeline and slow filling of
> > > the trace cache.  If the P4 had the extra resources we might see a better
> > > performance when using SMT.
> >
> > But where do the P4 Xeons fit into all of this?  That's the main P4 I use.
>
> As far as I know the only difference between the Xeon's and the normal P4
> was dual processor support and SMT(hyper-threading).  But now that the
> normal P4(3.06Ghz and above) supports SMT the only real difference is dual
> processor support.

Actually the Xeon supports much bigger configurations than two-way.  I've
seen eight-way operating, but I'm sure they get even bigger than that.

Peace...  Sridhar