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Technology Stocks : Advanced Micro Devices - Moderated (AMD)
AMD 259.56+1.9%11:34 AM EDT

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To: Mani1 who started this subject5/21/2001 2:58:04 PM
From: dougSF30Read Replies (2) of 275872
 
P4 & Linpack: A wacky design manifestation?

So I was looking at that Anand review, with the dual P4's exhibiting the same strange 'ringing' behavior with respect to linpack data sizes...

Seems to me that this is probably *not* throttling, unlike some of the other exhibits.

(The two processors seem too similar for this to be the result of independent TCCs triggering)

So what *is* it? The P3 and the Athlon don't have this kind of curve.

Is something wacked with the P4's cache subsystem / hardware prefetching strategy? Why all this ringing?

There's a 15-20% performance difference, depending on tiny shifts in the dataset size.

Where is Scumbria when we need him?

Doug

The P4. It throttles. It rings. It produces lots of heat. Sounds like they built a locomotive instead of a CPU.
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