Efficient organization of digital periphery to support integer datatype for memristor-based cim

Mahdi Zahedi, Mahta Mayahinia, Muath Abu Lebdeh, Stephan Wong, Said Hamdioui

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

Von Neumann-based architectures suffer from costly communication between CPU and memory. This communication imposes several orders of magnitude more power and performance overheads compared to the arithmetic operations performed by the processor. This overhead becomes critical for applications that require processing a large amount of data. Computation-in-Memory (CIM) leveraging memristor devices in the crossbar structure offers a potential solution to tackle this challenge. However, support for the integer data type is lacking in CIM approaches as most solutions operate on a single/few bits only. This paper proposes a new organization of the periphery (next to memristor crossbar) to compute matrix-matrix multiplication (MMM) at the tile level. More precisely, the analog additions performed in the crossbar is complemented with additions performed in the digital periphery. In this mixed analog-digital system, digital additions are performed in a way that only the minimum size of adders are required-this is to reduce the latency of the digital periphery as much as possible. In addition, the design is customized to the number of ADCs as well as datatype sizes to support different possible scenarios. The results show that our organization reduces energy and latency up to 50x and 3x, respectively, compared to the reference design.

Original languageEnglish
Title of host publication2020 IEEE Computer Society Annual Symposium on VLSI (ISVLSI)
Subtitle of host publicationProceedings
EditorsL. O'Conner
Place of PublicationPiscataway
PublisherIEEE
Pages216-221
Number of pages6
ISBN (Electronic)978-1-7281-5775-7
ISBN (Print)978-1-7281-5776-4
DOIs
Publication statusPublished - 2020
Event19th IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2020 - Limassol, Cyprus
Duration: 6 Jul 20208 Jul 2020

Conference

Conference19th IEEE Computer Society Annual Symposium on VLSI, ISVLSI 2020
CountryCyprus
CityLimassol
Period6/07/208/07/20

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