CPI of INT and FP instructions is reduced by 40% and the CPI of L/S and Branch is reduced by 30%?

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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Assume a program requires the execution of 75 x106 FP instructions, 112 x106
INT instructions, 88 ×106 L/S instructions, and 12 x 106 branch instructions.
The CPI for each type of instruction is 1, 3, 4, and 2, respectively. Assume that
the processor has a 2 GHz clock rate.
a) By how much must we improve the CPI of FP instructions if we want
the program to run two times faster?
b) By how much must we improve the CPI of L/S instructions if we want
the program to run two times faster?
c) By how much is the execution time of the program improved if the
CPI of INT and FP instructions is reduced by 40% and the CPI of L/S
and Branch is reduced by 30%?
Transcribed Image Text:Assume a program requires the execution of 75 x106 FP instructions, 112 x106 INT instructions, 88 ×106 L/S instructions, and 12 x 106 branch instructions. The CPI for each type of instruction is 1, 3, 4, and 2, respectively. Assume that the processor has a 2 GHz clock rate. a) By how much must we improve the CPI of FP instructions if we want the program to run two times faster? b) By how much must we improve the CPI of L/S instructions if we want the program to run two times faster? c) By how much is the execution time of the program improved if the CPI of INT and FP instructions is reduced by 40% and the CPI of L/S and Branch is reduced by 30%?
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