A computer system has an L1 cache, an L2 cache, and a main memory unit…
GATE · 2010 · CS · Computer Science & IT
A computer system has an L1 cache, an L2 cache, and a main memory unit connected as shown below. The block size in L1 cache is 4 words. The block size in L2 cache is 16 words. The memory access times are 2 nanoseconds. 20 nanoseconds and 200 nanoseconds for L1 cache, L2 cache and main memory unit respectively.
When there is a miss in L1 cache and a hit in L2 cache, a block is transferred from L2 cache to L1 cache. What is the time taken for this transfer?
- A.
2 nanoseconds
- B.
20 nanoseconds
- C.
22 nanoseconds
- D.
88 nanoseconds
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