LFTI: A Performance Metric for Evaluating Interconnect Topology and Routing Designs for Large-Scale HPC Systems

Xin Yuan, Professor, Florida State University, Department of Computer Science, Nov 28, 2012

In the second part of the talk, I will first discuss the limitations of the current approaches for evaluating topology and routing designs for HPC systems. I will then present a new performance metric, called LANL-FSU Throughput Indices (LFTI), that we develop for evaluating interconnect topology and routing designs. Unlike other existing performance metrics that are not very indicative of the application level performance, LFTI directly reflects the topology/routing's support for common communication patterns. LFTI can be derived from topology and routing specification without detailed simulation, which allows for rapid and comprehensive evaluation and comparison of different topology and routing designs.

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