CFD Benchmark of 64-bit PC Cluster
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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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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

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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