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2009 ACM/IEEE/SCS 23rd Workshop on Principles of Advanced and Distributed Simulation (2009)
Lake Placid, New York, USA
June 22, 2009 to June 25, 2009
ISSN: 1087-4097
ISBN: 978-0-7695-3713-9
pp: 35-44
n this paper we illustrate scalable parallel performance for the TimeWarp synchronization protocol on the L and P variants of the IBM BlueGene supercomputer. Scalable Time Warp performance for models that communicate a large percentage of the event population over the network has not been shown on more than a handful of processors. We present our design for a robust performing Time Warp simulator over a variety of communication loads, and extremely large processor counts-- up to 131,072. For the PHOLD benchmark model using 65,536 processors, our Time Warp simulator produces a peak committed event-rate of 12.26 billion events per second at 10\% remote events and 4 billion events per second at 100\% remote events, the largest ever reported. Additionally, for the Transmission Line Matrix (TLM) model which approximates Maxwell's equations for electromagnetic wave propagation, we report a committed event-rate in excess of 100 million on 5,000 processors with 200 million grid-LPs. The TLM model is particularly challenging given the bursty and cubic growth in event generation. Overall, these performance results indicate that scalable Time Warp performance is obtainable on high-processor counts over a wide variety of event scheduling behaviors and not limited to relatively low, non-bursty rates of off-processor communications.
Time Warp, Blue Gene Supercomputer

D. W. Bauer Jr., C. D. Carothers and A. Holder, "Scalable Time Warp on Blue Gene Supercomputers," 2009 ACM/IEEE/SCS 23rd Workshop on Principles of Advanced and Distributed Simulation(PADS), Lake Placid, New York, USA, 2009, pp. 35-44.
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