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避免模调度中cache代价的优化方法
引用本文:刘利,李文龙,郭振宇,李胜梅,汤志忠.避免模调度中cache代价的优化方法[J].软件学报,2005,16(10):1842-1852.
作者姓名:刘利  李文龙  郭振宇  李胜梅  汤志忠
作者单位:1. 清华大学,计算机科学与技术系,北京,100084
2. Intel中国研究中心,编译组,北京,100080
基金项目:Supported by the National Natural Science Foundation of China under Grant No.60573100(国家自然科学基金)
摘    要:软件流水能够加快循环的执行速度.模调度是一种被广泛采用的软件流水的启发式.为了改善存储系统,cache使用了分级机制,但这也带来了额外的存储延迟-cache代价.证明了模调度可能导致cache代价,并提出了一种可以避免模调度的cache代价的PCPMS(prevent cache penalty in modulo scheduling)算法.实验结果表明,PCPMS能够避免模调度中的cache代价,提高程序性能.

关 键 词:软件流水  模调度  存储优化  cache代价
收稿时间:1/6/2005 12:00:00 AM
修稿时间:05 12 2005 12:00AM

Optimization to Prevent Cache Penalty in Modulo Scheduling
LIU Li,LI Wen-Long,GUO Zhen-Yu,LI Sheng-Mei and TANG Zhi-Zhong.Optimization to Prevent Cache Penalty in Modulo Scheduling[J].Journal of Software,2005,16(10):1842-1852.
Authors:LIU Li  LI Wen-Long  GUO Zhen-Yu  LI Sheng-Mei and TANG Zhi-Zhong
Institution:1 Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China; 2 Compiler Group, Intel China Research Center Ltd, Beijing 100080, China
Abstract:Software pipelining can speedup the loop execution. Modulo scheduling is a widely used heuristic for software pipelining. Cache hierarchies can improve memory systems, but probably all processor implementations introduce additional delays (cache penalty). This paper demonstrates possible cache penalty due to modulo scheduling, and presents an algorithm named Prevent Cache Penalty in Modulo Scheduling (PCPMS), which can prevent cache penalty due to modulo scheduling. Experimental results show that PCPMS can prevent cache penalty and improve the performance of programs.
Keywords:software pipeline  modulo scheduling  memory optimization  cache penalty
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