Effective Communication and File-I/O Bandwidth Benchmarks.

Rabenseifner, R. ; Koniges, A. E.

Technical Information Center Oak Ridge Tennessee

关键词: Benchmarks;    Buffers;    Parallel processing;    Computers;    Programming;   

RP-ID  :  DE200515013314

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We describe the design and MPI implementation of two benchmarks created to characterize the balanced system performance of high-performance clusters and supercomputers: b-eff, the cornmunication-specific benchmark examines the parallel message passing performance of a system, and b-effio, which characterizes the effective I/0 bandwidth. Both benchmarks have two goals: (a) to get a detailed insight into the Performance strengths and weaknesses of different parallel communication and I/O patterns, and based on this, (b) to obtain a single bandwidth number that characterizes the average performance of the system namely communication and I/0 bandwidth. Both benchmarks use a time driven approach and loop over a variety of communication and access patterns to characterize a system in an automated fashion. Results of the two benchmarks are given for several systems including IBM SPs, Cray T3E, NEC SX-5, and Hitachi SR 8000. After a redesign of b-effio, I/O bandwidth results for several compute partition sizes are achieved in an appropriate time for rapid benchmarking.