? A Survey of Phase Change Memory Systems
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Journal of Computer Science and Technology 2015, Vol. 30 Issue (1) :121-144    DOI: 10.1007/s11390-015-1509-2
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A Survey of Phase Change Memory Systems
Fei Xia1,2(夏飞), Student Member, CCF, ACM, IEEE, De-Jun Jiang1(蒋德钧), Member, CCF, ACM, IEEE, Jin Xiong1(熊劲), Senior Member, CCF, Member, ACM, IEEE, Ning-Hui Sun1(孙凝晖), Fellow, CCF, Member, ACM, IEEE
1 State Key Laboratory of Computer Architecture, Institute of Computing Technology, Chinese Academy of Sciences Beijing 100190, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

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Abstract As the scaling of applications increases, the demand of main memory capacity increases in order to serve large working set. It is difficult for DRAM (dynamic random access memory) based memory system to satisfy the memory capacity requirement due to its limited scalability and high energy consumption. Compared to DRAM, PCM (phase change memory) has better scalability, lower energy leakage, and non-volatility. PCM memory systems have become a hot topic of academic and industrial research. However, PCM technology has the following three drawbacks: long write latency, limited write endurance, and high write energy, which raises challenges to its adoption in practice. This paper surveys architectural research work to optimize PCM memory systems. First, this paper introduces the background of PCM. Then, it surveys research efforts on PCM memory systems in performance optimization, lifetime improving, and energy saving in detail, respectively. This paper also compares and summarizes these techniques from multiple dimensions. Finally, it concludes these optimization techniques and discusses possible research directions of PCM memory systems in future.
Articles by authors
Fei Xia
De-Jun Jiang
Jin Xiong
Ning-Hui Sun
Keywordsphase change memory   memory system   performance   lifetime   energy     
Received 2014-04-17;

This work was supported by the National Basic Research 973 Program of China under Grant No. 2011CB302502, the National Natural Science Foundation of China under Grant No. 61379042, Huawei Research Program under Grant No. YB2013090048, and the Strategic Priority Research Program of Chinese Academy of Sciences under Grant No. XDA06010401.

About author: Fei Xia received his B.S. degree in computer science and technology from Xi'an Jiaotong Unversity in 2011. He is now a Ph.D. candidate in the Institute of Computing Technology, Chinese Academy of Sciences, Beijing. His research interests include computer architecture, non-volatile memory system, and storage systems.
Cite this article:   
Fei Xia, De-Jun Jiang, Jin Xiong, Ning-Hui Sun.A Survey of Phase Change Memory Systems[J]  Journal of Computer Science and Technology, 2015,V30(1): 121-144
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