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
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
icon
Related questions
Question
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: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)
(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)
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)
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

Blurred answer
Recommended textbooks for you
Computer Networking: A Top-Down Approach (7th Edi…
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Concepts of Database Management
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY