基于多核处理器的节能任务调度方法  

Energy-efficient Task Scheduling Approach for Multi-core Processors

作　　者：叶常华 左朝树 

机构地区：[1]保密通信重点实验室,成都610041

出　　处：《中国电子科学研究院学报》2012年第2期204-207,共4页Journal of China Academy of Electronics and Information Technology

摘　　要：由于关系到系统的安全性及散热代价等方面,能耗问题已经成为嵌入式系统研究的重点。对于多核处理器上具有依赖关系的周期性硬实时任务,设计了一种基于动态电压调节的节能任务调度方法。该方法首先用RDAG算法将任务独立化,然后以功耗最低为原则,采用遗传算法确定任务映射。基于Intel PXA270功耗模型,采用了几个随机任务集进行仿真实验,结果表明该方法比现有的方法节省了20%～30%的能耗。Related to the safety of system and the cost of cooling, saving energy has been an important is- sue. For periodic hard real-time tasks with dependence running on multi-core processors, an energy-effi- cient task scheduling approach based on dynamic voltage scaling （DVS） was designed. Based on inde- pendent tasks produced by the RDAG algorithm, the approach took genetic algorithm（GA） to get the opti- mal scheduling. Based on the power model of the Intel PXA270, simulation experiments were conducted with several random task graphs. Results showed that the proposed approach decreased energy effectively.

关 键 词：任务调度 动态电压调节 功耗优化 多核处理器 

分 类 号：TP302.7[自动化与计算机技术—计算机系统结构]