计算机工程与应用 ›› 2015, Vol. 51 ›› Issue (12): 43-48.

• 理论研究、研发设计 • 上一篇    下一篇

基于SRAM和STT-RAM的混合指令Cache设计

皇甫晓妍,樊晓桠,黄小平   

  1. 西北工业大学 计算机学院,西安 710129
  • 出版日期:2015-06-15 发布日期:2015-06-30

Design of hybrid instruction Cache based on SRAM and STT-RAM

HUANGFU Xiaoyan, FAN Xiaoya, HUANG Xiaoping   

  1. School of Computer Science, Northwestern Polytechnical University, Xi’an 710129, China
  • Online:2015-06-15 Published:2015-06-30

摘要: 随着工艺尺寸减小,传统基于SRAM的片上Cache的漏电流功耗成指数增长,阻碍了片上Cache容量的增加。基于牺牲者Cache的原理,利用SRAM写速度快,STT-RAM的非易失性、高密度、极低漏电流功耗等特性设计了一种基于SRAM和STT-RAM的混合型指令Cache。通过实验证明,该混合型指令Cache与传统基于SRAM的指令Cache相比,在不增加指令Cache面积的情况下,增加了指令Cache容量,并显著提高了指令Cache的命中率。

关键词: 自旋转移力矩随机存储器(STT-RAM), 指令Cache, 混合Cache

Abstract: With the decrease of the grain size, the leakage power of traditional on-chip SRAM-based Cache increases exponentially, which hinders the increase of capacity of Cache on chip. As SRAM’s write speed is faster and STT-RAM is non-volatile, high density and very low leakage power, this paper designs a hybrid instruction Cache with SRAM and STT-RAM. The experimental results show that, compared with the SRAM-based instruction Cache, the hybrid instruction Cache increases capacity and significantly improves the hit rate without increasing the area.

Key words: Spin-Transfer Torque Random Access Memory(STT-RAM), instruction Cache, hybrid Cache