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A Real-Time PES Supporting Runtime State Restoration after Transient Hardware-Faults
BibTeX
@MISC{Skambraks_areal-time,
author = {Martin Skambraks and Fernuniversität In Hagen},
title = {A Real-Time PES Supporting Runtime State Restoration after Transient Hardware-Faults},
year = {}
}
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Abstract
Controlling safety-critical real-time applications that cannot immediately be transferred to a safe state re-quires highly reliable Programmable Electronic Systems (PESs). This demand for fault-tolerance is usually sat-isfied by applying redundant processing structures in-side each PES and, additionally, configuring multiple PES redundantly. Instead of minimising the failure probability of single PESs, it is also desirable to provide a redundant configuration of PESs with the capability to re-start single units at runtime. This requires copying a PES’s internal state at runtime, since a re-started unit must equalise its internal state with that of its redun-dant counterparts before the redundant processing can be rejoined. As a result, redundancy attrition due to transient faults is prevented, since failed channels can be brought back on line. This article states the prob-lems concerned with runtime state restoration of real-time systems, discusses the advantages and disadvan-tages of existing techniques and introduces a hardware-supported state restoration concept.
Keyphrases
transient hardware-faults re-started unit single pes transient fault failure probability internal state real-time system hardware-supported state restoration concept safe state re-quires redundant processing structure multiple pe safety-critical real-time application re-start single unit pe internal state reliable programmable electronic system redundant processing redundant configuration runtime state restoration redundancy attrition redun-dant counterpart
