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首页> 外文期刊>Journal of Low Power Electronics >System Wide Dynamic Power Management for Weakly Hard Real-Time Systems
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System Wide Dynamic Power Management for Weakly Hard Real-Time Systems

机译：弱硬实时系统的全系统动态电源管理

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摘要

We address the problem of employing the dynamic power down strategy to reduce the system wide power consumption for a weakly hard real-time system. In this paper, the weakly hard realtime system is modeled using the (m, k)-model - requiring that at least m out of any k consecutive instances of a task meet their deadlines - which is closely related to the Quality of Service (QoS) requirements of the system. We present an on-line scheduling approach to minimize the overall energy consumption and guarantee the (m, k)-firm deadlines for the system at the same time. In our approach, we dynamically partition the workload into mandatory part and optional ones to meet the (m, k)-constraints, and carefully delay the mandatory workload to merge the short, separated idle intervals into longer ones to improve the energy reduction efficiency. Our experimental results show that, by judiciously scheduling the real-time tasks and shutting down the processor and/or peripheral devices, our approach can lead to significant energy savings while guaranteeing the (m, k)-firm deadlines at the same time.
机译：我们解决了采用动态掉电策略来降低硬弱实时系统的系统范围功耗的问题。在本文中，使用（m，k）模型对弱硬实时系统进行建模-要求任务的任何k个连续实例中至少有m个满足其截止日期-这与服务质量（QoS）密切相关）系统的要求。我们提出了一种在线调度方法，以最大程度地减少总能耗，并同时保证系统的（m，k）个公司最终期限。在我们的方法中，我们将工作负载动态划分为强制性部分和可选性部分，以满足（m，k）约束，并仔细延迟强制性工作量以将较短的，分离的空闲间隔合并为较长的间隔，以提高节能效率。我们的实验结果表明，通过明智地安排实时任务并关闭处理器和/或外围设备，我们的方法可以节省大量能源，同时保证（m，k）个固定期限。

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