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Parallel processing effectiveness Consider two versions of the task graph in Fig. Version U corresponds to each node requiring unit computation time. Version E/O corresponds to each odd-numbered node being unit-time and each even-numbered node taking twice as long.

a. Convert the E/O version to an equivalent V version where each node is unit-time.

b. Find the maximum attainable speed-up for each of the U and V versions.

c. What is the minimum number of processors needed to achieve the speed-ups of part (b)?

d. What is the maximum attainable speed-up in each case with three processors?

e. Which of the U and V versions of the task graph would you say is "more parallel" and why?

2304_versions of the task graph.jpg

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