实时抢占调度中的开销效应

Proceedings of the Seventh International Workshop on Hardware/Software Codesign (CODES'99) (IEEE Cat. No.99TH8450) Pub Date : 1999-03-01 DOI:10.1145/301177.301529

D. Rhodes, W. Wolf

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引用次数: 9

摘要

研究了单总线同构多处理器系统中相关任务图的硬实时可调度性。提出了一个包含中断、上下文切换和总线争用的模型。该模型捕捉实时操作系统效果，旨在真实地模拟处理器内和处理器间的通信。采用鲁棒调度器评估中断服务时间和上下文切换时间对可调度性的影响。对于所研究的一类任务图，证明了可调度性仅是IST和CST的加权和的非线性函数。

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Overhead effects in real-time preemptive schedules

The hard real-time schedulability of dependent task-graphs is studied for single bus homogeneous multiprocessor systems. A model which includes interrupts and context switching as well as bus contention is developed. The model captures real-time operating system effects aimed at realistically modeling both intra-processor and inter-processor communications. A robust scheduler is used to assess the impact of interrupt service time (IST) and context switching time (CST) on schedulability. For the class of task-graphs studied, it is shown that schedulability is a nonlinear function of only the weighted sum of IST and CST.

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来源期刊

Proceedings of the Seventh International Workshop on Hardware/Software Codesign (CODES'99) (IEEE Cat. No.99TH8450)

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