The Key Message (KM) approach prioritizes communications along the criticalpath to speed up the execution of parallel applications in a cluster environment. In this article, we introduce a family of three dynamic KM ...
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The Key Message (KM) approach prioritizes communications along the criticalpath to speed up the execution of parallel applications in a cluster environment. In this article, we introduce a family of three dynamic KM algorithms that take into account of the dynamic nature of underlying networks to improve over their predecessor. These three dynamic KM algorithms are: fixedcriticalpathdynamic KM (FDKM), Centralized Predictor dynamic KM (CDKM), and Distributed dynamic KM (DDKM). Our performance study based on simulation showed that in general CDKM performs better and is more stable than FDKM and DDKM under heavy traffic conditions. The performance of DDKM is close to that of CDKM and better than that of FDKM on average. By taking advantages of both FDKM and CDKM, DDKM can be expected to be a promising optimization in a real cluster environment.
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