Answer Posted / satyam gupta
Performance of cache memory is frequently measured in term of a quantity known as hit ratio. If CPU refers to memory and find the word in cache then it said to be a create hit. when word is not found in cache, it is in main memory and it counts a miss. The ratio of the number of hit divided by the total CPU reference to memory is the hit ratio. When hit ratio is high enough, so that most of the time the CPU access the cache instead of main memory, the average access time is closer to the access time of fast cache memory.
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