Suppose that you have a system with two levels of caches L1 and L2 and you have following information: L1 L2 Miss Rate 25% 8% Access time 2 clock cycles 15 clock cycles Given that L2 cache miss costs 90 clock cycles. Calculate the average memory access time (AMAT in clock cycles)? (Please round your answer to two decimal points)
Suppose that you have a system with two levels of caches L1 and L2 and you have following information: L1 L2 Miss Rate 25% 8% Access time 2 clock cycles 15 clock cycles Given that L2 cache miss costs 90 clock cycles. Calculate the average memory access time (AMAT in clock cycles)? (Please round your answer to two decimal points)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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Transcribed Image Text:1.
Suppose that you have a system with two levels of caches L1 and L2 and you have following information:
L1
L2
Miss Rate
25%
8%
Access time
2 clock cycles
15 clock cycles
Given that L2 cache miss costs 90 clock cycles. Calculate the average memory access time (AMAT in clock
cycles) ?
(Please round your answer to two decimal points)
2.
(Use information from Question 1)
Calculate AMAT if it is known that on average, 80% of L1 cache access latency is overlapped with
computation, 40% of L2 cache access latency is overlapped with computation and 10% of L2 miss latency is
overlapped with computation. Assume that on average, 3 memory references are serviced simultaneously for
L1 Cache accesses, 2.5 memory references are serviced simultaneously for L2 cache accesses, and only 1.5 for
L2 cache misses ?
(Please round your answer to two decimal points)
Transcribed Image Text:(Use information from Question 1 and 2)
Calculate the CPI if the perfect-cache CPI is 0.5 and 25% of all instructions are memory references
(load/store)?
(Please round your answer to two decimal points)
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