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Title: Exploiting Replicated Checkpoints for Soft Error Detection and Correction
Authors: Koç, Fahrettin
Bozdaş, Kenan
Karslı, Burak
Ergin, Oğuz
Keywords: Microprocessors
Register Rename
RAT Vulnerability
Soft Error
Error Detection and Correction
Issue Date: 2013
Publisher: Assoc Computing Machinery
Source: Design, Automation and Test in Europe Conference and Exhibition (DATE) -- MAR 18-22, 2013 -- Grenoble, FRANCE
Series/Report no.: Design Automation and Test in Europe Conference and Exhibition
Abstract: Register renaming is a widely used technique to remove false dependencies in contemporary superscalar microprocessors. A register alias table (RAT) is formed to hold current locations of the values that correspond to the architectural registers. Some recently designed processors take a copy of the rename table at each branch instruction, in order to recover its contents when a misspeculation occurs. In this paper first we investigate the RAT vulnerability against transient errors. Then we analyze the vulnerability of RAT checkpoints and propose two techniques for soft error detection and correction utilizing redundantly taken copies of the entries whose content is the same with the previous and/or next checkpoints. Simulation results of the spec 2006 benchmarks reveal that on the average RAT vulnerability is 25% and checkpoint vulnerability is 6%. Results also reveal that redundancy exists at sequential checkpoint copies and can be used for error detection and correction purposes. We propose techniques that exploit this redundancy and show that faults in 41% of all checkpoints and 44% of rolled-back checkpoints can be detected and errors in 33% of the rolled-back checkpoints can be corrected. Since we exploit the already available storage, proposed error detection and correction techniques can be implemented with minimal hardware overhead.
ISBN: 978-3-9815370-0-0
ISSN: 1530-1591
Appears in Collections:Bilgisayar Mühendisliği Bölümü / Department of Computer Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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