Running time - metrics for performance evaluation, Computer Engineering

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Running Time - Metrics for performance evaluation:

Running time is amount of time consumed in execution of an algorithm for a provided input on N-processor based parallel computer. The running time is indicated by T (n) where n denotes number of processors used. If value of n is equivalent to 1 then case is similar to a sequential computer. The relation between Execution time versus Number of processors is displayed in Figure below.

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Figure: Execution Time vs. number of processors

It can be easily seen from graph that as number of processors increases originally execution time decreases however after a definite optimum level execution time raises as number of processors raises. This inconsistency is due to the overheads included in raising number of processes.


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