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CFD Benchmark of 64-bit PC Cluster

CFD Benchmark of 64-bit PC Cluster. Yao-Huan Tseng Institute of Astronomy and Astrophysics, Academia Sinica, ROC. Abstract

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CFD Benchmark of 64-bit PC Cluster

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  1. CFD Benchmark of 64-bit PC Cluster Yao-Huan Tseng Institute of Astronomy and Astrophysics, Academia Sinica, ROC Abstract Although the 64-bit x86 machines have existed for few years, the price/performance ratio is not acceptable for a small research group like us and taking advantage of 64-bit x86 machines is not in a reasonable way until AMD 64-bit CPU present. The AMD 64-bit Opteron is a new device family based on a new 64-bit architecture that is compatible with the pre-existing x86 32-bit architecture. The most exciting feature of the Opteron is the build-in memory controller which is totally different strategy from Intel cpu and allows to maximize the performance of SMP machines. Here we present results from a few benchmark tests for running high order Godunov CFD codes and parallel VH-1 codes on a variety of 32/64-bit PCs. • Hardware • 8 single-cpu cluster (2.6GHz P4, 2GB DDR, 2x120GB IDE, Gbps NIC) • 10 dual-cpu 32bits cluster (2.4GHz Xeon, 2GB DDR, 120GB IDE, Gbps NIC) • 5 dual-cpu 64bits cluster (1.8GHz AMD Opetron, 2GB DDR, 120GB IDE, Gbps NIC) • 24 nodes Linpack Benchmark (60.51Gflops) Single CPU benchmark A: High order Godunov method 250x180 resolution B: Relax method 250x180 resolution C: High order Godunov method 1024x1024 resolution D: Relax method 1024x1024 resolution A B C D INTEL INTEL INTEL INTEL AMD AMD AMD AMD Dual CPU benchmark A: High order Godunov method 250 x 180 resolution B: Relax method 250 x 180 resolution C: High order Godunov method 1024 x 1024 resolution D: Relax method 1024 x 1024 resolution A B C D Parallel benchmark A: High order Godunov method 512 x 512 B: VH1(PPM) 1920 x 1920 INTEL INTEL AMD AMD • Summary • Although the difference frequency of CPUs, the single-cpu performance of AMD/Opteron(1.8GHz) is about ? of single Intel Xeon(2.4GHz) • In dual-cpu test, two intel Xeon take ? 1.6 execution time of one Xeon for larger scale problem. But almost no difference of execution time between AMD/Opteron running two jobs at the same time and running one job. • The performance scaling of the two clusters are almost the same for more CPUs involved. The overall performance of AMD/Opteron is superior to Intel/Xeon, not only the performance of single CPU but also the Opteron's NUMA memory architecture. 2004/11/30

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