Abstract
The IBM BlueGene/L supercomputer consists of up to 65536 compute nodes connected by several networks including a three-dimensional torus. The BlueGene/L control system allows a user to re-map MPI ranks to different physical torus coordinates at run-time. Effects of node mapping on application performance are investigated for Gray-code mappings with differing aspect ratios, permutations of the X, Y, and Z coordinates, random mappings and four new mapping types. Results are presented for three NAS parallel benchmarks - BT, CG, and MG - on 128-way partitions in co-processor mode and virtual node mode on the prototype BlueGene/L hardware. © Springer-Verlag Berlin Heidelberg 2005.
Cite
CITATION STYLE
Smith, B. E., & Bode, B. (2005). Performance effects of node mappings on the IBM BlueGene/L machine. In Lecture Notes in Computer Science (Vol. 3648, pp. 1005–1013). Springer Verlag. https://doi.org/10.1007/11549468_110
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