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基于DVS的实时多核嵌入式系统低功耗算法


□ 王力生 郭振轲

  (同济大学 电信学院 计算机系, 上海 201804)
  
  摘 要:动态电压调整(DVS)是低功耗设计方法中最基本的技术。然而,大部分的算法是基于单处理器平台的,并且仅考虑了相互独立的任务,这时使用DVS往往不能取得较好的效果。基于DVS提出了一种循环旋转调度技术来降低功耗,通过对程序中的循环进行重组,使得在满足时限的同时功耗最小,同时也考虑了电压转换所消耗的时间和功耗。
  关键词:嵌入式系统; 动态电压调节; 低功耗设计; 旋转调度
  中图分类号:TP301.6 文献标志码:A
   文章编号:10013695(2009)01012702
  
  Realtime dynamic voltage scaling algorithm for
  lowpower multicore embedded system
  WANG Lisheng, GUO Zhenke
  
  (Dept. of Computer, Institute of Telecommunication, Tongji University, Shanghai 201804, China)
  
  Abstract:DVS(dynamic voltage scaling) is one of the most powerful techniques to reduce energy consumption. However, most algorithms are based on uniprocessor and only consider independent tasks. In this situation, DVS will not get the best solution. This paper introduced a technology to reduce energy consumption which used rotation scheduling based on DVS. The algorithm repeatedly regrouped a loop and decreased the energy as much as possible within a timing constraint. Both time and energy overhead during a voltage transition was considered in this work.
  Key words:embedded system; DVS; lowpower design; rotation scheduling ......
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