| 摘要 |
The present invention is provided to clarify causes of hampering the performance by quantitatively associating a value of a parallel efficiency with factors of hampering the improvement of the performance of a parallel computer system. Processing time ±(p, n) for a portion to be sequentially processed, processing time ²(p, n)/p for a portion to be parallel processed and processing time Ã(p, n) caused by an overhead for the parallel processing at the time of the execution of a parallel processing program are measured. A parallelized rate R para (p, n), a sequential calculation time ratio R ± (p, n) and a parallel overhead ratio R Ã (p, n) are calculated by using the obtained processing time Ã(p, n) for the portion to be sequentially processed, ²(p, n) for the portion to be parallel processed and Ã(p, n) caused by the overhead for the parallel processing. A parallel efficiency E para (p, n) is calculated in accordance with an expression 1/R para (P, n)x(1-R ± (p,n)-R Ã (p, n)) .
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