D. Buntinas, G. Mercier, and W. Gropp, "Design and Evaluation of Nemesis, a Scalable, Low-Latency, Message-Passing Communication Subsystem," Proceedings of the 6th IEEE International Symposium on Cluster Computing and the Grid, Singapore, Singapore, IEEE Computer Society, 2005, . Also Technical Memorandum ANL/MCS-TM-292, November 2005. [pdf]
This paper presents a new low-level communication subsystem called Nemesis. Nemesis has been designed and implemented to be scalable and efficient both in the intranode communication context using shared-memory and in the internode communication case using high-performance networks and is natively multimethod-enabled. Nemesis has been integrated in MPICH2 as a CH3 channel and delivers better performance than other dedicated communication channels in MPICH2. Furthermore, the resulting MPICH2 architecture outperforms other MPI implementations in point-to-point benchmarks.