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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Dan3 who wrote (92881)	2/13/2000 2:58:00 PM
From: Scumbria	Read Replies (1) \| Respond to of 1574377

Dan, What makes a cache entry useful (or useless)? The likelyhood of reuse. The greater the associativity of the cache, the greater the likelyhood that it contains useful addresses. A 2 way cache will tend to keep throwing out useful addresses, whereas a 16 way will have less tendency to do that. A victim cache behind a 2-way cache would be a very good combination, because the 2 way cache is casting out a lot of useful addresses- which would be stored in the victim cache. On the other hand, a victim cache behind a 16 way cache would be much less efficient because the addresses being cast out of the 16 way cache are less likely to be reused. Scumbria