摘要： 针对机群系统中存在的大量空闲活跃结点所造成的严重能耗浪费,提出空闲结点的cache 式动态功耗管理模型,即利用结点多级休眠机制,将空闲结点划分为不同休眠等级的结点集合,每级休眠状态对应一级结点储备cache,力求获得近似活跃状态的系统响应速率,以及近似最深休眠状态的能耗节省。基于cache式功耗管理模型,综合能耗与响应速率两个因素,设计了空闲结点在不同休眠状态之间的动态升降级算法、基于储备池的资源结点分配与回收算法以及储备额阈值自适应算法,以在保证系统响应速率的同时降低系统能耗。实验表明,提出的空闲结点cache式功耗管理技术在作业相对延迟仅增加0.99%的代价下,系统空闲结点功耗降低69.51%,优化效果显著。
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