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A Realistic Integrated Model of Parallel System Workloads

机译:现实的并行系统工作负载集成模型

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Performance evaluation is a significant step in the study of scheduling algorithms in large-scale parallel systems ranging from supercomputers to clusters and grids. One of the key factors that have a strong effect on the evaluation results is the workloads (or traces) used in experiments. In practice, several researchers use unrealistic synthetic workloads in their scheduling evaluations because they lack models that can help generate realistic synthetic workloads. In this paper we propose a full model to capture the following characteristics of real parallel system workloads: 1) long range dependence in the job arrival process, 2) temporal and spatial burstiness, 3) bag-oftasks behaviour, and 4) correlation between the runtime and the number of processors. Validation of our model with real traces shows that our model not only captures the above characteristics but also fits the marginal distributions well. In addition, we also present an approach to quantify burstiness in a job arrival process (temporal) as well as burstiness in the load of a trace (spatial).
机译:在从超级计算机到集群和网格的大规模并行系统中,性能评估是研究调度算法的重要一步。影响评估结果的重要因素之一是实验中使用的工作量(或痕量)。实际上,一些研究人员在调度评估中使用了不切实际的综合工作量,因为他们缺乏可以帮助产生实际综合工作量的模型。在本文中,我们提出了一个完整的模型来捕获实际并行系统工作负载的以下特征:1)工作到达过程中的远程依赖性; 2)时间和空间突发性; 3)任务包行为;以及4)之间的相关性运行时间和处理器数量。用真实轨迹对我们的模型进行验证表明,我们的模型不仅具有上述特征,而且很好地拟合了边际分布。另外,我们还提出了一种量化工作到达过程中的突发性(时间)以及跟踪负载中的突发性(空间)的方法。

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