[Beowulf] Win64 Clusters!!!!!!!!!!!!
Peter St. John
peter.st.john at gmail.com
Wed Apr 11 12:59:00 PDT 2007
On 4/11/07, Geoff Jacobs <gdjacobs at gmail.com> wrote:
> Jon Forrest wrote:
> > The examples you give are very good reasons why there is
> > a clear need for more than 32-bits of address space for
> > data. Again, I agree completely. But, if you read my original
> > posting, this is not what I'm talking about. I'm talking
> > about the need for more than 32-bits of address space for
> > instructions (a.k.a "text"). Why don't you run the "size"
> > command on any of your big programs and report back what
> > you find. My guess is that they'll be in the order
> > of 10s of megabytes. (I agree that this method doesn't
> > show the true run-time text-size requirements but
> > it's a good first attempt).
> Um, that would require distinct memory pools or some weird internal
> mapping scheme. Not nice. Much better architecturally to have no
> difference between pointers to instructions and pointers to data.
Hear hear! For self-adapting softare you *can't* distinguish instructions
from data. That may sound over-specialized but I invite you to consider DNA
and what it does: instruct enzymes to modify DNA. An awful lot comes out of
that process. So I don't think it's just von Neumann's whim.
> Geoffrey D. Jacobs
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