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Predicting Performance of Resolution Changes in Parallel Simulations

机译:在并行仿真中预测分辨率变化的性能

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Multi-resolution models can be statically (i.e., before simulation) or dynamically (i.e., during simulation) abstracted to accelerate the simulations without compromising the analysis goals. However, abstractions must be carefully chosen because not all abstractions improve performance. Unfortunately, identifying performance enhancing transformations, particularly in parallel simulations, is a complex task. We have been investigating this bottleneck using a component-based, Time Warp synchronized modeling and simulation environment called WESE in which static and dynamic abstractions are performed using a methodology called Dynamic Component Substitution (DCS). Our ongoing research has resulted in further advances to a novel DCS Performance Prediction Methodology (DCSPPM). DCSPPM combines and compares platform-specific performance characteristics of components via static analysis of the model to predict performance changes due to DCS transformations. This paper presents the enhanced version of DCSPPM and experiments. Empirical evidence obtained using diverse models indicates that DCSPPM provides good estimates (error le 5%) of the performance impacts of DCS transformations.
机译:多分辨率模型可以是静态的(即在模拟之前)或动态的(即在模拟期间)抽象的,以加速仿真而不会影响分析目标。但是,必须谨慎选择抽象,因为并非所有抽象都能提高性能。不幸的是,识别性能增强的转换,尤其是在并行仿真中,是一项复杂的任务。我们一直在使用称为WESE的基于组件的时间扭曲同步建模和仿真环境来研究此瓶颈,在该环境中,使用称为动态组件替换(DCS)的方法执行静态和动态抽象。我们正在进行的研究导致了新型DCS性能预测方法(DCSPPM)的进一步发展。 DCSPPM通过模型的静态分析来组合和比较组件特定于平台的性能特征,以预测由于DCS转换而导致的性能变化。本文介绍了DCSPPM的增强版和实验。使用各种模型获得的经验证据表明,DCSPPM对DCS转换的性能影响提供了很好的估计(误差5%)。

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