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Politics : Formerly About Advanced Micro Devices
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To: Joe NYC who wrote (107318)4/22/2000 1:17:00 AM
From: Charles R  Read Replies (2) of 1573092
 
Joe,

<1. Do you find the cache hit rates they use in the ballpark? They have a hit rate of 128K L1 at 95%, additional 512K L2 at 80%, 256K at 78%, 64K at 65%. What would be the hit rate of 32K L1 (Pentium), or let's say going from 256K L2 to 512K, 1MB, 2MB. Is there an easy to remember formula to get the hit rates?>

The answer is it depends on the application. I used to have friend who had a hobby of writing programs that thrash the cache to bring some mainframes to a crawl.

Chuck
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