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Politics : Formerly About Advanced Micro Devices

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To: Tenchusatsu who wrote (94163)2/19/2000 1:09:00 AM
From: Scumbria  Read Replies (1) of 1570835
 
Ten,

So it seems Intel went all out to build a processor around a very long pipeline. As I pointed out before, it does seem like Intel is betting everything on clock speed.

It is nonsensical these days to do anything else other than a deep pipeline. The only way to achieve high clock speed is through a balanced, deep pipeline. Intel's management deserves credit for allowing the building of a 20 stage pipe. It is too bad that the Athlon pipeline is not longer, because it will have a hard time keeping up with Willy.

There are also "hazards" in a program's code which causes "pipeline bubbles," i.e. holes in the stream of instructions. In a longer pipeline, those bubbles will be larger, once again impacting real-world performance.


This is not really true. A deep pipeline will have more bubbles, but each bubble is of shorter duration, so the branch mispredict penalty is not much different in a deep pipeline than it is in a short pipeline.

Scumbria
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