Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN: 9780133594140
Author: James Kurose, Keith Ross
Publisher: PEARSON
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Consider a CPU that implements a single instruction fetch–decode–execute–write- back pipeline for scalar processing. The execution unit of this pipeline assumes that the execution stage requires one step. Describe, and show in diagram form, what happens when an instruction that requires one execution step follows one that requires four execution steps.
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- As a result, the specific mechanisms by which an instruction obtains its input data are decoupled from the specific means by which any other instruction obtains its input data. Use with a(n): A Synthesizing data sets using procedural descriptions B In contrast to the case of "multiple data, multiple instruction," in which C D stands for "data alone," there is just a single instruction. Many outcomes from a single orderarrow_forwardConsider the execution of a program that results in the execution of 8 million instructions on a 400-MHz processor. The program consists of four major types of instructions. The instruction mix and the CPI for each instruction type are given below. What is the program execution time in the second? Instruction Type Arithmetic and logic Load/store with cache hit Branch Floating-point arithmetic operation Execution Time: sec CPI 3 4 3 9 Instruction Mix (%) 60 20 12 8arrow_forwardconsider a CPU that implements two parallel fetch-execute pipelines for superscalar processing. Show the performance improvement over scalar pipeline processing and no-pipeline processing, assuming an instruction cycle similar to figure 4.1 in the Section I B of "Advanced Systems Concepts", i.e.: a one clock cycle fetch a two clock cycle decode a three clock cycle execute and a 200 instruction sequence: Show your work. 7. o pipelining would require _____ clock cycles: 8. A scalar pipeline would require _____ clock cycles: How high is the increase in speed (percentage) compared to no pipelining? 9. A superscalar pipeline with two parallel units would require ______ clock cycles: How high is the increase in speed (percentage) compared to no pipelining?arrow_forward
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