Earticle

초록

영어

Non-volatile memory (NVM)such as phase change memory (PCM) has emerged as an attractive type of next-generation memories. NVMcan be incorporated into memory hierarchy to solve the problems of current DRAM instorage density and energy consumption.NVM is byte addressable and its latency is close to main memory, it exhibits higher density and lower idle power consumption than DRAM. However, NVM haslimited write endurance and asymmetriclatency and energy consumption for read and write operations. Therefore, hybrid memory systems involving both NVM and DRAM have been proposed for better utilizing NVM and DRAM. In this paper, we present a novel hybrid memory management schemecalled W-HCLOCK (Write-aware Hybrid CLOCK) that aims to keep a high hit ratio and minimize writes to NVM. Particularly, we introduce the concept of Recent-Rewrite-Distance (RRD), and combine it with recency of write operations to estimate the write-hotness of pages. Then, weplacewrite-intensive pages in DRAM to reduce NVM writes. In addition, we keepadditional information about the writes to evicted pages to avoid unnecessary migrations between DRAM and PCM. We conduct simulation experiments on four synthetic traces and one real OLTP trace. The results suggest the efficiency of our proposal.

목차

Abstract
 1. Introduction
 2. Related Work
 3. W-HCLOCK
  3.1. Data Structure
  3.2. Page Migration
  3.3 Page Management
 4. Experiments
  4.1. Experimental Setup
  4.2. NVM Write Count with Zipf Traces
  4.3. Page Faults with Zipf Traces
  4.4. Experimental Result withthe OLTP trace
 5. Conclusions
 References

키워드

저자

• Zhangling Wu [ School of Computer Science and Technology, University of Science and Technology of China, Hefei, 230027, China, Key Laboratory of Electromagnetic Space Information, Chinese Academy of Sciences, Hefei 230027, China ]
• Peiquan Jin [ Key Laboratory of Electromagnetic Space Information, Chinese Academy of Sciences, Hefei 230027, China ]
• Chengcheng Yang [ School of Computer Science and Technology, University of Science and Technology of China, Hefei, 230027, China, Key Laboratory of Electromagnetic Space Information, Chinese Academy of Sciences, Hefei 230027, China ]
• Lihua Yue [ School of Computer Science and Technology, University of Science and Technology of China, Hefei, 230027, China, Key Laboratory of Electromagnetic Space Information, Chinese Academy of Sciences, Hefei 230027, China ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  International Journal of Control and Automation

• 간기

  월간

• pISSN

  2005-4297

• 수록기간

  2008~2016

• 십진분류

  KDC 505 DDC 605