Scalable Time Warp on Blue Gene Supercomputers

Abstract—In this paper we illustrate scalable parallel performance for the Time Warp synchronization protocol on the L and P variants of the IBM Blue Gene 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 Tranmission 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-...

• Type: Conference
• Year: 2009
• Where: PADS
• Authors: David W. Bauer, Christopher D. Carothers, Akintayo Holder
• Keywords: Modelling And Simulation, PADS 2009, Scalable Time Warp, Time Warp, Time Warp Performance