Evolving Skyrmion Racetrack Memory as Energy-Efficient Last-Level Cache Devices

Ya Hui Yang, Shuo Han Chen, Yuan Hao Chang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

Skyrmion racetrack memory (SK-RM) has been regarded as a promising alternative to replace static random-access memory (SRAM) as a large-size on-chip cache device with high memory density. Different from other nonvolatile random-access memories (NVRAMs), data bits of SK-RM can only be altered or detected at access ports, and shift operations are required to move data bits across access ports along the racetrack. Owing to these special characteristics, wordbased mapping and bit-interleaved mapping architectures have been proposed to facilitate reading and writing on SK-RM with different data layouts. Nevertheless, when SK-RM is used as an on-chip cache device, existing mapping architectures lead to the concerns of unpredictable access performance or excessive energy consumption during both data reads and writes. To resolve such concerns, this paper proposes extracting the merits of existing mapping architectures for allowing SK-RM to seamlessly switch its data update policy by considering the write latency requirement of cache accesses. Promising results have been demonstrated through a series of benchmark-driven experiments.

Original languageEnglish
Title of host publication2022 ACM/IEEE International Symposium on Low Power Electronics and Design, ISLPED 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781450393546
DOIs
StatePublished - 2 Aug 2022
Event2022 ACM/IEEE International Symposium on Low Power Electronics and Design, ISLPED 2022 - Virtual, Online, United States
Duration: 1 Aug 20222 Aug 2022

Publication series

NameProceedings of the International Symposium on Low Power Electronics and Design
ISSN (Print)1533-4678

Conference

Conference2022 ACM/IEEE International Symposium on Low Power Electronics and Design, ISLPED 2022
Country/TerritoryUnited States
CityVirtual, Online
Period1/08/222/08/22

Keywords

  • cache
  • energy-efficient
  • LLC
  • SK-RM
  • skyrmion racetrack memory

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