Performance analysis of explicit group parallel algorithms for distributed memory multicomputer

Since their introduction, the four-point explicit group (EG) and explicit decoupled group (EDG) methods in solving elliptic PDE's have been implemented on various parallel computing architectures such as shared memory parallel computer and distributed computer systems. However, no detailed study on the performance analysis of these algorithms was done in any of these implementations. In this paper we developed performance models for these explicit group methods and present detailed study of their hypothetical implementation on two distributed memory multicomputers with different computation speed and communication bandwidth. Detailed performance analysis based on these models predicted different theoretical performance if the methods were implemented on the clusters. This was confirmed by the experimental results performed on the two distinct clusters. Theoretical analysis and experimental results indicated that both explicit group methods are scalable with respect to number of processors and the problem size. (C) 2007 Published by Elsevier B.V.