Question: Assume that for a program, compiler C results in an instruction count of 20000 and has an execution time of 50 microseconds. Given that the processor has a clock cycle of 2 ns, what is the average CPI? Question: Continue from the previous question. If a new compiler is developed that uses only 15000 instructions and has an average CPI of 1.3. What is The execution time of using the new compiler on the original processor?

Question: Assume that for a program, compiler C results in an instruction count of 20000 and has an execution time of 50 microseconds. Given that the processor has a clock cycle of 2 ns, what is the average CPI? Question: Continue from the previous question. If a new compiler is developed that uses only 15000 instructions and has an average CPI of 1.3. What is The execution time of using the new compiler on the original processor?

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter10: Application Development

Section: Chapter Questions

Problem 3RQ

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Suppose we have two different compilers, A and B, which each compile the same Java program to a particular computer’s machine language. Compiler A results in a program with 2.0 x 109 instructions and a CPU time of 1.1s. Compiler B results in a program with 2.4 x 109 instructions and a CPU time of 1.5s. What is the average CPI for each compiler’s program if the computer’s processor has a clock cycle time of 1ns? Suppose a new compiler C is developed which results in a program with 9.2 x 108 instructions and a CPI of 1.1. What is the speedup of using compiler C instead of compiler A? Instead of compiler B? Suppose we run the programs compiled by compilers A and B on two separate computers. Suppose also that the CPU time for each is exactly the same. How much faster is the clock running compiler A’s code versus the clock running compiler B’s code? (Hint: the first step is to calculate the total cycles each program requires)
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