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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1005-1013 |
| Number of pages | 9 |
| Journal | Lecture Notes in Computer Science |
| Volume | 3648 |
| DOIs | |
| State | Published - 2005 |
| Externally published | Yes |
| Event | 11th International Euro-Par Conference, Euro-Par 2005 - Lisbon, Portugal Duration: Aug 30 2005 → Sep 2 2005 |
ASJC Scopus subject areas
- Theoretical Computer Science
- General Computer Science