Large-scale Parallel Program Simulation Environment and Performance Analysis of NAS Parallel Benchmarks 2.3

摘要

Large-scale data parallel program simulation technique is described. Message passing trace data of a parallel program is collected by the instrumentation tool EXCIT and it is analyzed by the network simulator which is generated by INSPIRE. The behavior of parallel programs on thousands of processors can be simulated. The LU and MG NAS Parallel Benchmarks 2.3 are simulated and analyzed. The influences of various conditions such as cache size and network bandwidth are measured. Experimental results show that small cache size is enough to exe- cute these benchmark programs effectively. Network start up time affects the total execution time, however, the influence of network bandwidth is little observed on the8e benchmarks.