Parallel Expanded Event Simulation of Tightly Coupled Systems
针对无线通信系统等紧耦合模型在并行仿真中的挑战，提出扩展事件建模范式，将离散事件扩展为持续时段，并基于此设计保守同步方案，实现多核系统上的高效并行仿真。
The technical evolution of wireless communication technology and the need for accurately modeling these increasingly complex systems causes a steady growth in the complexity of simulation models. At the same time, multi-core systems have become the de facto standard hardware platform. Unfortunately, wireless systems pose a particular challenge for parallel execution due to a tight coupling of network entities in space and time. Moreover, model developers are often domain experts with no in-depth understanding of parallel and distributed simulation. In combination, both aspects severely limit the performance and the efficiency of existing parallelization techniques. We address these challenges by presenting parallel expanded event simulation , a novel modeling paradigm that extends discrete events with durations that span a period in simulated time. The resulting expanded events form the basis for a conservative synchronization scheme that considers overlapping expanded events eligible for parallel processing. We then put these concepts into practice by implementing H orizon , a parallel expanded event simulation framework specifically tailored to the characteristics of multi-core systems. Our evaluation shows that H orizon achieves considerable speedups in synthetic as well as real-world simulation models and considerably outperforms the current state-of-the-art in distributed simulation.