IntrodParallel2

Question 1

The parallel system is scalable if:

Accepted Answer

It maintains efficiency at a fixed value by simultaneously increasing the number of processors and the size of the problem.

Answer

We can add the new resources and system still works

Answer

The efficiency increase linearly with the number of processors

Answer

No correct answer

Question 2

Gustafson Law's (speedup) says that:

Accepted Answer

There are no any speedup limitations

Answer

Speedup is limited by sequential fraction of the program

Answer

Speedup increase linearly with the number of used processors

Answer

No correct answer

Question 3

WAW hazard is a consequence of:

Accepted Answer

Data dependence

Answer

Antidependence

Answer

Output dependence

Answer

Control dependence

Question 4

When we use the reservation station and Tomasulo’s scheme, instruction execution is divided onto:

Accepted Answer

No correct answer

Answer

Five steps like using standard pipeline.

Answer

Four steps: Issue, Execute, Write Result, Commit

Answer

Four steps: Fetch, Decode, Execute, Write result

Question 5

How can loop unrolling be defined?

Accepted Answer

This technique restructures a loop by writing the iterations as straight-line code segments with only one loop control testing.

Answer

This technique restructures a loop by writing the iterations as straight-line code segments, but still we need to perform loop control testing as many times as at the source loop

Answer

this technique enables executing the loop with different order of intstruction execution

Answer

No correct answer

Question 6

What kind of communication, and for which architecture is implemented by the following program fragment

Accepted Answer

Communication all_to_all for ring architecture

Answer

Communication all_to_all for mesh architecture

Answer

Communication one_to_all for hypercube architecture

Answer

No correct answer

IntrodParallel2

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Comentarios · 0

The parallel system is scalable if:

Gustafson Law's (speedup) says that:

WAW hazard is a consequence of:

When we use the reservation station and Tomasulo’s scheme, instruction execution is divided onto:

How can loop unrolling be defined?

What kind of communication, and for which architecture is implemented by the following program fragment