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Computer science / Computer Organization and Design 5 / Chapter 1 / Problem 1.13

Computer Organization and Design | 5th Edition | ISBN: 9780124077263 | Authors: David A. Patterson

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Another pitfall cited in Section 1.10 is expecting to

Chapter 1, Problem 1.13

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QUESTION:

Another pitfall cited in Section 1.10 is expecting to improve the overall performance of a computer by improving only one aspect of the computer. Consider a computer running a program that requires 250 s, with 70 s spent executing FP instructions, 85 s executed L/S instructions, and 40 s spent executing branch instructions.

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QUESTION:

Another pitfall cited in Section 1.10 is expecting to improve the overall performance of a computer by improving only one aspect of the computer. Consider a computer running a program that requires 250 s, with 70 s spent executing FP instructions, 85 s executed L/S instructions, and 40 s spent executing branch instructions.

ANSWER:

Step 1 of 5

1.13.1

The condition given is time for FP operations is reduced by 20%. Then we have to find the percentage of reduction in total time.

The total time is calculated as follows

The time for INT operations is not given in the question. The values given are ,

, , and . Applying these values in the above equation, we can find the time for INT operations.

Thus the time for INT operations is 55 s.

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