Vax 11/780 performance vs Sun 4/280 performance

[Guy Harris]

> 	Realizing that if this *is* true on the RoadRuner it will be
> 	true at a much lower number,

No, not true.  The RR has about the same raw CPU speed as a 3/200-series
machine.  Furthermore, it has a different memory management unit; it appears
the MMU may be the crux of the biscuit here.

> does anyone know if such a thing is true on it ?

If, as would be indicated by the number of processes at which the knee occurs,
the knee is caused by running out of MMU contexts (the Sun-3 MMU has 7 contexts
available for user processes, the Sun-4 has 15), I would tend not to expect the
same phenomenon on an RR; the '386 has a fairly conventional
in-memory-page-table MMU.

DISCLAIMER: This is just an educated guess.  I don't have any numbers to back
this up.  Don't take this as gospel truth; if you *do* get numbers, let us all
know, the results may be interesting (especially if they *don't* back this
guess up).