In-register duplication: Exploiting narrow-width value for improving register file reliability

Jie Hu, Shuai Wang, Sotirios G. Ziavras

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

61 Scopus citations

Abstract

Protecting the register value and its data buses is crucial to reliable computing in high-performance microprocessors due to the increasing susceptibility of CMOS circuitry to soft errors induced by high-energy particle strikes. Since the register file is in the critical path of the processor pipeline, any reliable design that increases either the pressure on the register file or the register file access latency is not desirable. In this paper, we propose to exploit narrow-width register values, which present the majority of the generated values, for duplicating a copy of the value within the same data item, called in-register duplication (IRD), eliminating the requirement of additional copy registers. The datapath pipeline is augmented to efficiently incorporate parity encoding and parity checking such that error recovery is seamlessly supported in IRD and the parity checking is overlapped with the execution stage to avoid increasing the critical path. Our experimental evaluation using the SPEC CINT2000 benchmark suite shows that IRD provides superior read-with-duplicate (RWD) and error detection/recovery rates under heavy error injection as compared to previous reliability schemes.

Original languageEnglish (US)
Title of host publicationProceedings - DSN 2006
Subtitle of host publication2006 International Conference on Dependable Systems and Networks
Pages281-290
Number of pages10
DOIs
StatePublished - 2006
EventDSN 2006: 2006 International Conference on Dependable Systems and Networks - Philadelphia, PA, United States
Duration: Jun 25 2006Jun 28 2006

Publication series

NameProceedings of the International Conference on Dependable Systems and Networks
Volume2006

Other

OtherDSN 2006: 2006 International Conference on Dependable Systems and Networks
CountryUnited States
CityPhiladelphia, PA
Period6/25/066/28/06

All Science Journal Classification (ASJC) codes

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications

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