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ELEMENTS OF A CACHE DESIGN (Replacement Algorithm (Least recently used…
ELEMENTS OF A CACHE DESIGN
Cache Size
Number of bytes in the cache
Small to minimize cost, large for high hit ratio
Mapping Function
Direct
Associative
Set Associative
Replacement Algorithm
Least recently used (LRU)
First In First Out
Least Frequently used (LFU)
Random
Write Policy
Write Through
Write Back
Write once
Line size
- commonly sized 4 - 16 words
Large, look-ahead space - to read more sectors on the disk than are called for by the software
Small, more lines in cache memory , smaller cache line load,
Number Of Cache
Single / Two Level
Unified / Split