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Subject: Re: Multiple processors on one chip...

Author: Tom Kerrigan

Date: 06:18:13 03/03/00

Go up one level in this thread


On March 03, 2000 at 07:59:47, Robert Hyatt wrote:

>By the end of the year there will be more than just AMD.  At least two other
>companies will likely have a product with such an architecture by year's end.

I'm all for this.

The press releases I've read (AMD, IBM, Compaq) imply that two top-of-the-line
processors are going to be combined onto one monster die.

I find this a little annoying. Things like out-of-order execution, branch
prediction, speculative execution, register renaming, etc. all burn silicon real
estate (not to mention make the control logic impossible to understand), and I
don't really see the benefits.

I mean, the original Pentium didn't do any of this stuff, and it does more per
clock cycle than a P6.

I would really like to see some benchmarks of a processor with speculative
execution turned on vs. off.

I can't imagine that out-of-order execution is doing anything useful,
considering the optimizing compilers we have these days...

-Tom



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