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Technology Stocks : Intel Corporation (INTC)
INTC 35.10+2.3%3:59 PM EST
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To: Scumbria who wrote (107850)8/21/2000 12:50:23 PM
From: Tenchusatsu  Read Replies (1) of 186894
 
Scumbria, <If they made the speed limit on one mile of the Bay Bridge 100MPH, would that allow more people to get through the toll booth each hour?>

You just described Flynn's Bottleneck (named after a guy who made money off of stating the obvious). The number of instructions you execute is directly limited by the number of instructions you fetch. No self-respecting CPU architect would ever forget about that bottleneck.

In my opinion, there are two uses for a double-speed ALU:

1) You only need to implement half as many execution pipes.

2) Certain data hazards can be bypassed. If there is an instruction that depends on the results of the previous instruction, both can be sent down the double-speed ALU and be executed in one (regular) clock cycle. Two execution units running at normal speed will need two clock cycles to handle those instructions (thereby leaving one unit unutilized).

Tenchusatsu
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