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Titolo:
REAL-TIME RECOVERY OF FAULT-TOLERANT PROCESSING ELEMENTS
Autore:
SIMS T;
Indirizzi:
CHARLES STARK DRAPER LAB INC,555 TECHNOL SQ CAMBRIDGE MA 02139
Titolo Testata:
IEEE aerospace and electronic systems magazine
fascicolo: 12, volume: 12, anno: 1997,
pagine: 13 - 18
SICI:
0885-8985(1997)12:12<13:RROFPE>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Citazioni:
5
Recensione:
Indirizzi per estratti:
Citazione:
T. Sims, "REAL-TIME RECOVERY OF FAULT-TOLERANT PROCESSING ELEMENTS", IEEE aerospace and electronic systems magazine, 12(12), 1997, pp. 13-18

Abstract

A critical problem in the design of ultra-reliable fault tolerant systems is that of how to bring a redundant member back on-line, after a transient fault, without degrading critical real-time functions. Recovery from transients is imperative to maintain necessary system reliability in the face of transient errors which have been estimated to occur at a rate of 5 to 100 times that of permanent failures. Excessive delays associated with recovery become a problem when as much as 1 Mbytes of RAM in the faulty processor must be made congruent with the processing majority while maintaining full functionality of critical, real-time control algorithms. This paper describes a hardware assisted recovery technique which uses memory ''tags'' to determine which memory segments need to be restored such that recovery can be performed incrementally without affecting real-time operational tasks. Also presented is performance data associated with this technique's application to a Draper Laboratory quad-redundant processor responsible for vehicle control of a manned undersea vehicle.

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Documento generato il 24/09/20 alle ore 05:01:36