A synthetic task model for HPC-grade optical network performance evaluation

Authors:
Sébastien Rumley;Lisa Pinals;Keren Bergman;Gilbert Hendry
Affiliations:
Columbia University, New York;Columbia University, New York;Columbia University, New York;Sandia National Laboratories, Livermore, CA
Venue:
IA^3 '13 Proceedings of the 3rd Workshop on Irregular Applications: Architectures and Algorithms
Year:
2013

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Abstract

With vastly increasing system parallelism, energy efficient data movement has emerged as one of the key challenges in High Performance Computing (HPC). Optics offers the potential for creating system-wide interconnection networks with extremely high bandwidth and energy efficiency. To reap the significant benefits of optical data movement, the interconnect design must go beyond a simple wire replacement to include a fully networked architecture. Simulation is an essential tool in the associated architecture design space exploration. However, simulation requires appropriate models for capturing the relevant interactions between parallel application communication and network operations, as well as the photonic physical layer integrity. An important goal is to keep the simulation as simple as possible to enable a wide design space exploration. In this paper, we propose a traffic generation model that captures the interactions and dependencies between computation and communication for a given application. Our proposed model remains tractable enough to be implemented on top of detailed photonic network simulators as well as general enough to analyze different components of the network under investigation.