高层综合中面向运算器电源门控技术的低能耗调度算法  

A Novel Low Power Scheduling Algorithm for Functional Unit Power Gating in High-Level Synthesis

作　　者：姚蔓婷 邱源 柳宜川 袁伟娜[1] 汪楠 YAO Manting;QIU Yuan;LIU Yichuan;YUAN Weina;WANG Nan(School of Information Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;Shanghai Academy of Spaceflight Technology,Shanghai 200233,China)

机构地区：[1]华东理工大学信息科学与工程学院,上海200237 [2]上海航天计算机技术研究所,上海200233

出　　处：《华东理工大学学报（自然科学版）》2022年第4期543-548,共6页Journal of East China University of Science and Technology

基　　金：国家自然科学基金青年科学基金(61604054);上海航天科技创新基金(SAST-2017-112)。

摘　　要：针对细粒度电源门控技术,本文在高层综合中通过对操作进行合理的调度以降低运算器的能耗。首先分析了电源门控技术下运算器的突破点,并将能耗优化问题转化为调度中的间隔时长优化问题;然后分析了不同调度结果下的空闲间隙的惩罚时长;最后将操作调度至惩罚时长最小的时钟周期。实验结果表明,本文算法能够在不增加电路面积以及工作时延的条件下较为显著地减少电路的能耗,从而为星载平台设备提供更好的设计结果。Power gating technology is a low-energy circuit design widely used recently.It can optimize the circuit energy consumption by reasonably switching the power supply of the module circuit.In this paper,an algorithm integrating both the scheduling and binding processes is developed for the fine-grained functional unit(FU)powergating technique so as to achieve the maximum leakage energy reduction.Firstly,the break-even points of FUs are analyzed,and the leakage energy reduction problem is formulated as an idle interval partition problem.Secondly,the penalty duration of idle interval length under different scheduling result is analyzed.Besides,the operation is scheduled to the clock cycle with minimum penalty time.Finally,the experimental results show that the proposed algorithms can significantly reduce the energy consumption of the circuit without increasing the circuit area and working delay,and provides better design solution for spaceborne platform equipment.

关 键 词：漏电能耗 运算器电源门控 高层综合 调度 

分 类 号：TN47[电子电信—微电子学与固体电子学]