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Suppose we have the following information about a code sequence: 1. The code sequence consists of two types of instructions type A and type B. 2. 25% of the instructions in the code are of type A and the rest are type B. 3. The CPI of type A is 4 and the CPI of type B is 1.33 1. Compute the overall CPI of the code sequence. 2. Assume an alternative design of the same ISA that tries to decrease the CPI of all type A instructions to 2.5. With the new design of the ISA what will be the overall CPI? Please note that the CPU is not changed. 3. Compare the performance of the old and the new design - which design is faster and by what factor.

Suppose we have the following information about a code sequence: 1. The code sequence consists of two types of instructions type A and type B. 2. 25% of the instructions in the code are of type A and the rest are type B. 3. The CPI of type A is 4 and the CPI of type B is 1.33 1. Compute the overall CPI of the code sequence. 2. Assume an alternative design of the same ISA that tries to decrease the CPI of all type A instructions to 2.5. With the new design of the ISA what will be the overall CPI? Please note that the CPU is not changed. 3. Compare the performance of the old and the new design - which design is faster and by what factor.

Computer Networking: A Top-Down Approach (7th Edition)
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...
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Suppose we have the following information about a code sequence: 1. The code sequence consists of two types of instructions type A and type B. 2. 25% of the instructions in the code are of type A and the rest are type B. 3. The CPI of type A is 4 and the CPI of type B is 1.33 1. Compute the overall CPI of the code sequence. 2. Assume an alternative design of the same ISA that tries to decrease the CPI of all type A instructions to 2.5. With the new design of the ISA what will be the overall CPI? Please note that the CPU is not changed. 3. Compare the performance of the old and the new design - which design is faster and by what factor.
Transcribed Image Text:Suppose we have the following information about a code sequence: 1. The code sequence consists of two types of instructions type A and type B. 2. 25% of the instructions in the code are of type A and the rest are type B. 3. The CPI of type A is 4 and the CPI of type B is 1.33 1. Compute the overall CPI of the code sequence. 2. Assume an alternative design of the same ISA that tries to decrease the CPI of all type A instructions to 2.5. With the new design of the ISA what will be the overall CPI? Please note that the CPU is not changed. 3. Compare the performance of the old and the new design - which design is faster and by what factor.
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Step 1: Problem Information:

Problem Information:

  • We have two types of instructions: Type A and Type B.
  • 25% of the instructions are Type A, so 75% are Type B.
  • Type A takes 4 cycles per instruction (CPI), and Type B takes 1.33 CPI.
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