Optimizing bandwidth limited problems using one-sided communication and overlap

This paper demonstrates the one-sided communication used in languages like UPC can provide a significant performance advantage for bandwidth-limited applications. This is shown through communication microbenchmarks and a case-study of UPC and MPI implementations of the NAS FT benchmark. Our optimizations rely on aggressively overlapping communication with computation, alleviating bottlenecks that typically occur when communication is isolated in a single phase. The new algorithms send more and smaller messages, yet the one-sided versions achieve

• Type: Conference
• Year: 2006
• Where: IPPS
• Authors: Christian Bell, Dan Bonachea, Rajesh Nishtala, Katherine A. Yelick
• Keywords: Communication Microbenchmarks, Distributed And Parallel Computing, IPPS 2006, NAS FT Benchmark, One-sided Communication