Utilizing PCM for energy optimization in embedded systems

Zili Shao, Yongpan Liu, Yiran Chen, Tao Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

44 Citations (Scopus)

Abstract

Due to its high density, bit alterability, and low standby power, phase change memory (PCM) is considered as a promising DRAM alternative. In embedded systems, especially battery-driven mobile devices, energy is one of the most important performance metrics. Therefore, it becomes an interesting problem of utilizing PCM for energy optimization in embedded systems. While recently there have been extensive studies on PCM, energy optimization with PCM in embedded systems has not been fully addressed. In this paper, we present a hybrid memory system architecture in which PCM is used to replace DRAM as much as possible so the system energy can be reduced by utilizing the lower standby power of PCM. However, to achieve this, system-level software optimization techniques are required in order to solve problems caused by the three disadvantages of PCM: namely, long write latency, large write energy and limited write endurance. We propose an optimal static data allocation scheme to solve a simplified problem, and discuss how to extend this to solve more complex problems. We also present emerging research issues in compiler optimization, real-time task scheduling and operating systems when utilizing PCM for energy optimization in embedded systems.
Original languageEnglish
Title of host publicationProceedings - 2012 IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2012
Pages398-403
Number of pages6
DOIs
Publication statusPublished - 29 Oct 2012
Event2012 IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2012 - Amherst, MA, United States
Duration: 19 Aug 201221 Aug 2012

Conference

Conference2012 IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2012
CountryUnited States
CityAmherst, MA
Period19/08/1221/08/12

Keywords

  • Embedded Systems
  • Energy
  • PCM (Phase Change Memory)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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