Work-in-progress: A scalable stochastic number generator for phase change memory based in-memory stochastic processing

Supreeth Mysore Shivanandamurthy, Ishan G. Thakkar, Sayed Ahmad Salehi

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

1 Scopus citations

Abstract

Stochastic computing based Processing-In-Memory (PIM) architectures (e.g., [1]) can provide massive parallelism with higher energy-efficiency, for implementing complex computations in main memory. However, stochastic computing arithmetic requires random bit streams generated by stochastic number generators (SNGs), which account for significant area and energy consumption. Moreover, SNGs' numerical precision needs improvement to reduce errors in stochastic computations [1]. Thus, low numerical precision and high implementation overheads of SNGs can offset the benefits of adopting stochastic computing in PIM architectures. In this paper, we exploit the inherent stochasticity of Phase Change Memory (PCM) cells to design a scalable and area-energy efficient SNG for PCM-based stochastic PIM architectures. Our designed SNG can achieve up to ~300× lower area and up to ~250× lower energy consumption with better numerical precision, compared to the Linear Feedback Shift Register (LFSR) based conventional SNG from [2].

Original languageEnglish
Title of host publicationProceedings of the International Conference on Hardware/Software Codesign and System Synthesis Companion, CODES/ISSS 2019
ISBN (Electronic)9781450369237
DOIs
StatePublished - Oct 13 2019
Event2019 International Conference on Hardware/Software Codesign and System Synthesis, CODES/ISSS 2019 - New York, United States
Duration: Oct 13 2019Oct 18 2019

Publication series

NameProceedings of the International Conference on Hardware/Software Codesign and System Synthesis Companion, CODES/ISSS 2019

Conference

Conference2019 International Conference on Hardware/Software Codesign and System Synthesis, CODES/ISSS 2019
Country/TerritoryUnited States
CityNew York
Period10/13/1910/18/19

Keywords

  • Phase Change Memory(PCM)
  • Processing-In-Memory(PIM)
  • Stochastic Number generator(SNG)

ASJC Scopus subject areas

  • Hardware and Architecture
  • Software
  • Information Systems

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