Q. 37 The read access times and the hit ratios for different caches in a memory hierarchy are as given below:
The read access time of main memory in 90 nanoseconds. Assume that the caches use the referred-word-first read policy and the writeback policy. Assume that all the caches are direct mapped caches. Assume that the dirty bit is always 0 for all the blocks in the caches. In execution of a program, 60% od memory reads are for instruction fetch and 40% are for memory operand fetch. The average read access time in nanoseconds (up to 2 decimal places) is _________
Note: This question appeared as Numerical Answer Type.
(A) 2.74
(B) 4.72
(C) 3.10
(D) 2.67
Answer: (B)
Explanation:
