Nils Smeds

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The BlueGene/L supercomputer will consist of 65,536 dual-processor compute nodes interconnected by two high-speed networks: a three-dimensional torus network and a tree topology network. Each compute node can only address its own local memory, making message passing the natural programming model for BlueGene/L. In this paper we present our implementation of(More)
Good performance monitoring is the basis of modern performance analysis tools for application optimization. We are providing a variety of such performance analysis tools for the new Blue Genet/L supercomputer. Those tools can be divided into two categories: single-node performance tools and multinode performance tools. From a single-node perspective, we(More)
The IBM BlueGene/L (BG/L) super-computer holds 3 of the top 10 rankings on the 26th TOP500 list of LINPACK performance. The system is novel in its design in many aspects when compared to other more traditional high-performance computing systems. When developing system libraries as well as when tuning application code for BG/L it is essential to be able to(More)
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