solution

A computer has a level 1 cache with an access time of 2 cycles and an average hit rate of 90% and DRAM access time is 50 cycles.

a. What is the average memory access time for this computer? Ans: _________ cycles

(Give answer with two precision format, e.g. 1.23)

b. If the system is upgraded with a level 2 cache with a hit ratio of 85% and an access time of 12 cycles. What is the new average memory access time for this computer?

Ans: ___________ cycles

(Give answer with two precision format, e.g. 1.23)

Note: Addition of L2 cache has no impact on access time for DRAM.