Communication Characteristics in the NAS Parallel Benchmarks

A. Faraj and X. Yuan (USA)

Keywords

NAS parallel benchmarks, Communication Characteristics, Compiled Communication.

Abstract

In this paper, we investigate the communication characteristics of the Message Passing Interface (MPI) implementation of the NAS parallel benchmarks and study the effectiveness of com piled communication for MPI programs. Compiled communication is a technique that utilizes the compiler knowledge of both the application communication requirement and the underlying network architecture to signi´Čücantly optimize the performance of communications whose information can be determined at compile time (static communications). The results indicate that com piled communication can be applied to a large portion of the communications in the benchmarks. In particular, the majority of collective communications are static.

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