In designing a computer’s cache system, the cache block (or cache line) size…
2017
In designing a computer’s cache system, the cache block (or cache line) size is an important parameter. Which one of the following statements is correct in this context?
- A.
Smaller block size incurs lower cache miss penalty
- B.
Smaller block size implies better spatial locality
- C.
Smaller block size implies smaller cache tag
- D.
Smaller block size implies lower cache hit time
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Correct answer: A
A smaller cache block size reduces the amount of data transferred from main memory during a miss. Since fetching fewer bytes takes less time, the cache miss penalty is lower compared to larger block sizes.
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