Analyzing reliability of memory sub-systems with double-chipkill detect/correct

Xun Jian, Nathan Debardeleben, Sean Blanchard, Vilas Sridharan, Rakesh Kumar

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

Abstract

Chip kill correct is an advanced type of error correction used in memory sub-systems. Existing analytical approaches for modeling the reliability of memory sub-systems with chipkillcorrect are limited to those with chip kill-correct solutions that guarantee correction of errors in a single DRAM device. However, stronger chip kill correct solutions that are capable of guaranteeing the detection and even correction of errors in up to two DRAM devices have become common in existing HPC systems. Analytical reliability models are needed for such memory subsystems. This paper proposes analytical models for the reliability of double-chipkill detect and/or correct. Validation against Monte Carlo simulations shows that the output of our analytical models are within 3.9% of Monte Carlo simulations, on average. We used the analytical models to study various aspects of the reliability of memory sub-systems protected by double-chip kill detect and/or correct. Our studies provide several insights into the dependence of reliability of these systems on scale, device fault rate, memory organization, and memory-scrubbing policy.

Original languageEnglish (US)
Title of host publicationProceedings - 2013 IEEE 19th Pacific Rim International Symposium on Dependable Computing, PRDC 2013
PublisherIEEE Computer Society
Pages88-97
Number of pages10
ISBN (Print)9780769551302
DOIs
StatePublished - 2013
Event19th IEEE Pacific Rim International Symposium on Dependable Computing, PRDC 2013 - Vancouver, BC, Canada
Duration: Dec 2 2013Dec 4 2013

Publication series

NameProceedings of IEEE Pacific Rim International Symposium on Dependable Computing, PRDC
ISSN (Print)1541-0110

Other

Other19th IEEE Pacific Rim International Symposium on Dependable Computing, PRDC 2013
Country/TerritoryCanada
CityVancouver, BC
Period12/2/1312/4/13

Keywords

  • chipkill correct
  • error correcting codes
  • memory errors
  • modeling
  • reliability

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Science Applications
  • Hardware and Architecture
  • Software

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