系统级能耗优化的实时电压调度方法研究  

Real-time dynamic voltage scheduling for system-level energy reduction

作　　者：雷霆[1] 胡潇[1] 周学海[1] 

机构地区：[1]中国科学技术大学计算机科学技术系,安徽合肥230026

出　　处：《系统工程与电子技术》2006年第1期153-158,共6页Systems Engineering and Electronics

基　　金：国家自然科学基金资助课题(60273042)

摘　　要：如何在满足实时性要求的前提下尽可能降低系统能耗,已成为目前实时系统设计面临的新挑战。针对动态优先级节能调度研究存储器操作的系统级能耗优化问题。通过设计线性整数规划模型提出了实现离线节能调度的SYS-SEDF算法,并分析临界频率及其计算方法,进而提出了应用于在线节能调度的SYS-CCEDF算法和SYS-LAEDF算法。实验表明,SYS-DVS系列算法可较好地降低系统级能耗。Real-time systems are often severely energy-constrained, The need to meet real-time constraint while staying within energy constraint presents new design challenges. Based on dynamic priority scheduling, dynamic voltage scaling algorithms for system-level energy reduction based on the .power model with processor and memory are proposed. An integer linear programming model is presented for computing the optimal static frequency, which is applied to SYS-SEDF algorithm for offline real-time energy-efficient scheduling. The threshold frequency of different real-time tasks is analyzed for run-time energy optimization, Furthermore, SYS-CCEDF and SYS-LAEDF algorithins are presented for online real-time energy-efficient scheduling. Experiments show the proposed SYS-DVS algorithms can achieve a higher system-level energy reduction ratio compared with the FAST-DVS algorithms.

关 键 词：实时系统 调度算法 低功耗 动态电压/频率调整 

分 类 号：TP136[自动化与计算机技术—控制理论与控制工程]