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A Generalised Error Model and Schedulability Guarantees for Dependable Real-Time Systems
Mälardalens högskola, Akademin för innovation, design och teknik.ORCID-id: 0000-0001-5053-6725
Mälardalens högskola, Akademin för innovation, design och teknik.ORCID-id: 0000-0001-5269-3900
2011 (Engelska)Ingår i: Proceedings of the 1st International Workshop on Dependable and Secure Industrial and Embedded Systems (WORDS), 2011Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The fundamental requirement for the design of effective and efficient fault-tolerance mechanisms in dependable real-time systems is a realistic and applicable model of potential faults, their manifestations and consequences. Fault and error models also need to be evolved based on the changes in the environments of usage or even based on technological advances. In this paper we propose a novel probabilistic burst error model in lieu of the commonly used simplistic fault assumptions. We introduce an approach to reason about real-time systems schedulability under the proposed error model in a probabilistic manner. We first present a sufficient analysis that accounts for the worst case interference caused by error bursts on the response times of tasks scheduled under the fixed priority scheduling (FPS) policy. Further, we identify potential sources of pessimism in the calculations and propose an algorithm that refines the results.

Ort, förlag, år, upplaga, sidor
2011.
Nationell ämneskategori
Datorsystem
Identifikatorer
URN: urn:nbn:se:mdh:diva-13669OAI: oai:DiVA.org:mdh-13669DiVA, id: diva2:466213
Konferens
First International Workshop on Dependable and Secure Industrial and Embedded Systems (WORDS 2011), June 14, 2011, Västerås, Sweden
Tillgänglig från: 2011-12-15 Skapad: 2011-12-15 Senast uppdaterad: 2015-07-31Bibliografiskt granskad

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