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Scheduling Heterogeneous Systems Using Relative Latencies

机译:使用相对延迟调度异构系统

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Scheduling of parallel modules of an application may produce a significant impact on the performance. The problem of finding optimal schedule is, however, NP-complete. The diversity of the processing elements adds to the complexity that is addressed by presenting heuristic algorithms. This paper presents a novel heuristic Relative Latency-based Scheduling (RLS) for producing schedules for heterogeneous systems. The suggested approach makes use of processing capabilities of the existing processors for diverse number of successors in a task graph while making scheduling decisions. The experiments have been performed on a large number of graphs using different topologies including fork-join, Laplace equation solver, Cholesky decomposition and random graphs. The RLS variants produce better results with a significant difference in schedule length as compared to the well-known HEFT and LMT strategies used for scheduling heterogeneous systems.
机译:调度应用程序的并行模块可能会对性能产生重大影响。但是,找到最佳时间表的问题是NP完全的。处理元素的多样性增加了通过展示启发式算法解决的复杂性。本文提出了一种新颖的启发式基于相对延迟的调度(RLS),用于为异构系统生成调度。所提出的方法在制定调度决策时,利用现有处理器的处理能力来处理任务图中的多个后继对象。实验已使用不同的拓扑在许多图上进行,包括叉连接,Laplace方程求解器,Cholesky分解和随机图。与用于调度异构系统的众所周知的HEFT和LMT策略相比,RLS变体产生更好的结果,并且调度长度显着不同。

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