CoMet: A Synthetic Benchmark for Message-Passing Architectures

Rapid advances in hardware technology have led to wide diversity in parallel computer architectures. This diversity makes it di cult to evaluate or compare the performance of di erent parallel computers. Existing benchmarks tend either to be too architecture-speci c, or too high-level. Both problems can result in benchmarks that not only provide insu cient information on the performance characteristics of the computer being tested, but are also di cult to port. New benchmarking approaches are needed for new architectural classes, particularly distributed-memory, message-passing computers. This paper focuses on benchmarking distributed-memory message-passing computers. A synthetic benchmark called CoMet (COmmunication METrics), is presented. CoMet is based on common communication patterns found in parallel scienti c algorithms. This paper presents the CoMet design, and describes an implementation of CoMet on the Intel iPSC/860. CoMet is freely available by anonymous FTP from Oregon Graduate Institute.