计算机科学 ›› 2015, Vol. 42 ›› Issue (2): 191-197.doi: 10.11896/j.issn.1002-137X.2015.02.041
邓定胜
DENG Ding-sheng
摘要： 针对现有磁盘功率管理方法无法处理高能耗并行应用的短空闲周期、大规模的代码更改和能耗开销较大等问题,提出了一种面向编译器的数据访问调度技术。该技术包括两个阶段:在第一阶段,编译器分析并行应用程序,提取磁盘访问模式,然后生成调度表；在第二阶段,“数据访问调度器”根据调度表进行数据访问。与先前基于软件的策略相比,所提方法不需要改变代码或数据结构。实验评估结果表明,对于数据密集型工作负载,所提方法可以有效提升节能效果,节能率从5.5%上升到11.8%,从而增加了磁盘降速策略对数据密集型高性能计算的可行性。此外,它也将多速磁盘的节能效果从12.7%增加到了27.6%。
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