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Design methodology for optimizing optical interconnection networks in high performance systems

Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)

Rumley, Sébastien; Glick, Madeleine; Hammond, Simon D.; Rodrigues, Arun; Bergman, Keren

Modern high performance computers connect hundreds of thousands of endpoints and employ thousands of switches. This allows for a great deal of freedom in the design of the network topology. At the same time, due to the sheer numbers and complexity involved, it becomes more challenging to easily distinguish between promising and improper designs. With ever increasing line rates and advances in optical interconnects, there is a need for renewed design methodologies that comprehensively capture the requirements and expose tradeoffs expeditiously in this complex design space. We introduce a systematic approach, based on Generalized Moore Graphs, allowing one to quickly gauge the ideal level of connectivity required for a given number of end-points and traffic hypothesis, and to collect insight on the role of the switch radix in the topology cost. Based on this approach, we present a methodology for the identification of Pareto-optimal topologies. We apply our method to a practical case with 25,000 nodes and present the results.

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TYPE Conference Poster YEAR 2015
ScopusOSTI

An evaluation of MPI message rate on hybrid-core processors

International Journal of High Performance Computing Applications

Barrett, Brian W.; Brightwell, Ronald B.; Grant, Ryan E.; Hammond, Simon D.; Hemmert, Karl S.

Power and energy concerns are motivating chip manufacturers to consider future hybrid-core processor designs that may combine a small number of traditional cores optimized for single-thread performance with a large number of simpler cores optimized for throughput performance. This trend is likely to impact the way in which compute resources for network protocol processing functions are allocated and managed. In particular, the performance of MPI match processing is critical to achieving high message throughput. In this paper, we analyze the ability of simple and more complex cores to perform MPI matching operations for various scenarios in order to gain insight into how MPI implementations for future hybrid-core processors should be designed.

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TYPE Journal Article YEAR 2014
ScopusOSTIDOI
Results 201–225 of 266
Results 201–225 of 266