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Politics : Formerly About Advanced Micro Devices
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To: Dan3 who wrote (92909)2/13/2000 11:34:00 PM
From: Scumbria  Read Replies (1) of 1575991
 
Dan,

The 16-way cache gives up 12.5% (2/16ths) of its useful capacity duplicating addresses in the 2-way cache - but the remainder of the 16-way cache acts as a psuedo victim cache, maintaining addresses cast out of the 2-way cache.

I'm starting to understand how you are thinking. The piece of information you aren't addressing is that in the 16 way cache, 8 times as many addresses map into a particular cache index. Most of the remaining 14/16 of the cache set will be filled with addresses that are also resident in the 2 way cache (in different indexes.)

If you wish, I could print some simple C code to show the address mapping and why there is so much overlap.

Scumbria

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