Victor: A Variation-resilient Approach Using Cell-Clustered Charge-domain computing for High-density High-throughput MLC CiM

Mingyen Lee, Wenjun Tang, Yiming Chen, Juejian Wu, Hongtao Zhong, Yixin Xu, Yongpan Liu, Huazhong Yang, Vijaykrishnan Narayanan, Xueqing Li

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Multi-level cell (MLC) NVM-based CiM has become a promising candidate in computing-in-memory (CiM) designs because of its non-volatility, high cell density, and improving compatibility with the CMOS process. However, most MLC CiM faces the challenges of non-ideal device limitations, including the low on/off ratio, large device-to-device variations, and read disturbances, which limit the computing accuracy, reliability, and throughput performance. This work proposes Victor, a variation-resilient approach using cell-clustered charge-domain computing for high-density and high-throughput MLC CiM. A cell-clustered-computing with local recovery unit (LRU) design methodology is proposed to improve matrix-vector-multiplication (MVM) reliability and throughput. To showcase the capability of Victor, 2b-4b MLC Resistive RAM (RRAM) is taken as an example for design and evaluation. Results show that Victor reaches 3.56x energy efficiency, 4x variation tolerance compared with the prior ratio-based MLC CiM. In addition, the throughput is improved by 3.1x with less than 1% DNN accuracy loss. Moreover, a dynamic boundary adaption approach is proposed to restore the accuracy loss of state drifting, which in return reduces the energy and latency overhead by 100x and 1.25x, respectively, compared with the conventional write-and-verify approach.

Original languageEnglish (US)
Title of host publication2023 60th ACM/IEEE Design Automation Conference, DAC 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350323481
DOIs
StatePublished - 2023
Event60th ACM/IEEE Design Automation Conference, DAC 2023 - San Francisco, United States
Duration: Jul 9 2023Jul 13 2023

Publication series

NameProceedings - Design Automation Conference
Volume2023-July
ISSN (Print)0738-100X

Conference

Conference60th ACM/IEEE Design Automation Conference, DAC 2023
Country/TerritoryUnited States
CitySan Francisco
Period7/9/237/13/23

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Modeling and Simulation

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