Topological Properties of Hypercubes
IEEE Transactions on Computers
On Embedding Rectangular Grids in Hypercubes
IEEE Transactions on Computers
Efficient generation of the binary reflected gray code and its applications
Communications of the ACM
An overview of the BlueGene/L Supercomputer
Proceedings of the 2002 ACM/IEEE conference on Supercomputing
Blue Gene: a vision for protein science using a petaflop supercomputer
IBM Systems Journal - Deep computing for the life sciences
Topology mapping for Blue Gene/L supercomputer
Proceedings of the 2006 ACM/IEEE conference on Supercomputing
A Case Study of Communication Optimizations on 3D Mesh Interconnects
Euro-Par '09 Proceedings of the 15th International Euro-Par Conference on Parallel Processing
Mapping communication layouts to network hardware characteristics on massive-scale blue gene systems
Computer Science - Research and Development
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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.