Question: MPI question 1. How can the process index within an MPI program be determined during execution? 2. Given a program which is 20% serial, how

MPI question

1. How can the process index within an MPI program be determined during execution?

2. Given a program which is 20% serial, how many processors will it likely take to achieve a speedup of 4?

3. According to the Gustafson-Barsiss Law, given 128 processors and a code with 10% serial execution, what speedup might be achieved?

4. What does a rising experimentally determined serial fraction tend to indicate?

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