计算机工程 ›› 2011, Vol. 37 ›› Issue (24): 251-253.doi: 10.3969/j.issn.1000-3428.2011.24.084

• 开发研究与设计技术 • 上一篇    下一篇

流处理器的相变存储器主存性能优化

郝秀蕊,安 虹,李小强,汤旭龙   

  1. (中国科学技术大学计算机科学与技术学院,合肥 230027)
  • 收稿日期:2011-06-28 出版日期:2011-12-20 发布日期:2011-12-20
  • 作者简介:郝秀蕊(1982-),男,硕士研究生,主研方向:微处理器体系结构;安虹,教授;李小强,博士研究生;汤旭龙,硕士研究生
  • 基金项目:
    “核高基”重大专项(2009ZX01036-001-002);国家自然 科学基金资助项目(60970023);国家“973”计划基金资助项目(2011 CB302501)

Main Memory Performance Optimization of Phase Change RAM in Stream Processor

HAO Xiu-rui, AN Hong, LI Xiao-qiang, TANG Xu-long   

  1. (School of Computer Science and Technology, University of Science and Technology of China, Hefei 230027, China)
  • Received:2011-06-28 Online:2011-12-20 Published:2011-12-20

摘要: 将相变存储器(PCRAM)作为流处理器Imagine的主存储器,对其性能进行优化。建立(PCRAM)性能分析模型,针对PCRAM可写次数有限的缺陷,采用避免冗余位写技术,使PCRAM的生命周期延长3.4倍。利用PCRAM的非易失性,避免不必要的缓存行写回。分析访存调度算法对 PCRAM性能的影响,结果表明,row/open调度算法性能较优,适合PCRAM使用。

关键词: 相变存储器, 非易失性, 访存调度算法, 避免冗余位写技术, 流处理器

Abstract: This paper uses the Phase Change RAM(PCRAM) as the main memory of Imagine stream processor, studies the performance optimization of it. It builds the performance analysis model of PCRAM. In order to enhance the limited PCRAM write endurance, it uses redundant bit-writes removal technology to extend the endurance of PCRAM to an average 3.4x longer. It uses nonvolatile feature to avoid not necessary row buffer write back. It analyzes the memory access schedule algorithms, and results show that the row/open memory access schedule algorithm is suitable for PCRAM.

Key words: Phase Change RAM(PCRAM), non-volatility, memory access schedule algorithm, redundant bit-writes removal technology, stream processor

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