Real-time dynamic hardware reconfiguration for processors with redundant functional units

  • The tiny logic elements in modern integrated circuits increase the rate of transient failures significantly. Therefore, redundancy on various levels is necessary to retain reliability. However, for mixed-criticality scenarios, the typical processor designs offer either too little fault-tolerance or too much redundancy for one part of the applications. Amongst others, we specifically address redundant processor internal functional units (FU) to cope with transient errors and support wear leveling. A real-time operating system (RTOS) was extended to control our prototypical hardware platform and, since it can be configured deterministically within few clock cycles, we are able to reconfigure the FUs dynamically, at process switching time, according to the specified critically of the running processes. Our mechanisms were integrated into the Plasma processor and the Plasma-RTOS. With few changes to the original software code, it was, for example, possible to quickly change from fault-detecting to fault-correcting modes of the processorThe tiny logic elements in modern integrated circuits increase the rate of transient failures significantly. Therefore, redundancy on various levels is necessary to retain reliability. However, for mixed-criticality scenarios, the typical processor designs offer either too little fault-tolerance or too much redundancy for one part of the applications. Amongst others, we specifically address redundant processor internal functional units (FU) to cope with transient errors and support wear leveling. A real-time operating system (RTOS) was extended to control our prototypical hardware platform and, since it can be configured deterministically within few clock cycles, we are able to reconfigure the FUs dynamically, at process switching time, according to the specified critically of the running processes. Our mechanisms were integrated into the Plasma processor and the Plasma-RTOS. With few changes to the original software code, it was, for example, possible to quickly change from fault-detecting to fault-correcting modes of the processor on demand.show moreshow less

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Metadaten
Author: Rotta, Randolf, Segabinazzi Ferreira, RaphaelORCiD, Nolte, Jörg
URN:urn:nbn:de:kobv:co1-opus4-52031
DOI:https://doi.org/10.1109/ISORC49007.2020.00035
ISBN:978-1-7281-6958-3
ISSN:2375-5261
Parent Title (English):Proceedings of the 2020 IEEE 23rd International Symposium on Real-Time Distributed Computing (ISORC)
Publisher:Institute of Electrical and Electronics Engineers Inc. (IEEE)
Place of publication:Nashville, TN, USA
Document Type:Conference Proceeding
Language:English
Year of Completion:2020
Release Date:2020/06/30
Tag:Mixed-criticality; Modular redundancy; Reconfiguration; Run-Time
GND Keyword:Funktionseinheit; Laufzeit; Redundanz <Informatik>; Rekonfiguration
Source:R. Rotta, R. Segabinazzi Ferreira and J. Nolte, "Real-Time Dynamic Hardware Reconfiguration for Processors with Redundant Functional Units," 2020 IEEE 23rd International Symposium on Real-Time Distributed Computing (ISORC), Nashville, TN, USA, 2020, pp. 154-155, doi: 10.1109/ISORC49007.2020.00035.
Institutes:Fakultät 1 MINT - Mathematik, Informatik, Physik, Elektro- und Informationstechnik / FG Verteilte Systeme und Betriebssysteme
Licence (German):Keine Lizenz vergeben. Es gilt das deutsche Urheberrecht.