1.15 [10/10/20/20] Your company has just bought a new 22-core processor, and you

Question

1.15 [10/10/20/20] Your company has just bought a new 22-core processor, and you have been tasked with optimizing your software for this processor. You will run four applications on this system, but the resource requirements are not equal. Assume the system and application characteristics listed in Table 1.1 Table 1.1 Four applications Application % resources needed % parallelizable 41 50 27 80 18 60 14 90 The percentage of resources of assuming they are all run in serial. Assume that when you parallelize a portion of the program by X, the speedup for that portion is X. a. [10] How much speedup would result from running application A on the entire 22-core b. [10] How much speedup would result from running application D on the entire 22-core c. [20] Given that application A requires 41% of the resources, if we statically assign it 41% of d. [20] What is the overal speedup if all four applications are statically assigned some of the e. [10] Given acceleration through parallelization, what new percentage of the resources are processor, as compared to running it serially? processor, as compared to running it serially? the cores, what is the overall speedup if A is run parallelized but everything else is run serially? cores, relative to their percentage of resource needs, and all run parallelized? the applications receiving, considering only active time on their statically-assigned cores?

Explanation / Answer

Solution:

In question it is defined that what is speedup,that is when you parallelize a portion of the program by X, the speedup for that portion is X.

If whole program is running serially means it has no parallellized portion. So speedup will be 0.

a)

Parallelizable portion of A is 50%. so, speedup is 50

b)

Parallelizable portion of D is 90%. so, speedup is 90

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