In this exercise, we will look at the diff erent ways capacity aff ects overall performance. In general, cache access time is proportional to capacity. Assume that main memory accesses take 70 ns and that memory accesses are 36% of all instructions. Th e following table shows data for L1 caches attached to each of two processors, P1 and P2.   L1 Size L1 Miss Rate L1 Hit Time P1 2 KiB 8.0% 0.66 ns P2 4 KiB 6.0% 0.90 ns Assuming that the L1 hit time determines the cycle times for P1 and P2, what are their respective clock rates? What is the Average Memory Access Time for P1 and P2? Assuming a base CPI of 1.0 without any memory stalls, what is the total CPI for P1 and P2? Which processor is faster?

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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In this exercise, we will look at the diff erent ways capacity aff ects overall performance. In general, cache access time is proportional to capacity. Assume that main memory accesses take 70 ns and that memory accesses are 36% of all instructions. Th e following table shows data for L1 caches attached to each of two processors, P1 and P2.

  L1 Size L1 Miss Rate L1 Hit Time
P1 2 KiB 8.0% 0.66 ns
P2 4 KiB 6.0% 0.90 ns

Assuming that the L1 hit time determines the cycle times for P1 and P2, what are their respective clock rates?
What is the Average Memory Access Time for P1 and P2?
Assuming a base CPI of 1.0 without any memory stalls, what is the total CPI for P1 and P2? Which processor is faster?

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