Skyrmion Vault: Maximizing Skyrmion Lifespan for Enabling Low-Power Skyrmion Racetrack Memory

Syue Wei Lu, Shuo Han Chen, Yu Pei Liang, Yuan Hao Chang, Kang Wang, Tseng Yi Chen, Wei Kuan Shih

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

Abstract

Skyrmion racetrack memory (SK-RM) has demonstrated great potential as a high-density and low-cost nonvolatile memory. Nevertheless, even though random data accesses are supported on SK-RM, data accesses can not be carried out on individual data bit directly. Instead, special skyrmion manipulations, such as injecting and shifting, are required to support random information update and deletion. With such special manipulations, the latency and energy consumption of skyrmion manipulations could quickly accumulate and induce additional overhead on the data read/write path of SK-RM. Meanwhile, injection operation consumes more energy and has higher latency than any other manipulations. Although prior arts have tried to alleviate the overhead of skyrmion manipulations, the possibility of minimizing injections through buffering skyrmions for future reuse and energy conservation receives much less attention. Such observation motivates us to propose the concept of skyrmion vault to effectively utilize the skyrmion buffer track structure for energy conservation through maximizing the lifespan of injected skyrmions and minimizing the number of skyrmion injections. Experimental results have shown promising improvements in both energy consumption and skyrmions' lifespan.

Original languageEnglish
Title of host publicationASP-DAC 2023 - 28th Asia and South Pacific Design Automation Conference, Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages333-338
Number of pages6
ISBN (Electronic)9781450397834
DOIs
StatePublished - 16 Jan 2023
Event28th Asia and South Pacific Design Automation Conference, ASP-DAC 2023 - Tokyo, Japan
Duration: 16 Jan 202319 Jan 2023

Publication series

NameProceedings of the Asia and South Pacific Design Automation Conference, ASP-DAC

Conference

Conference28th Asia and South Pacific Design Automation Conference, ASP-DAC 2023
Country/TerritoryJapan
CityTokyo
Period16/01/2319/01/23

Keywords

  • lifespan
  • SK-RM
  • skyrmion racetrack memory

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