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2011
ACM

Cost-effective safety and fault localization using distributed temporal redundancy

7 years 6 months ago
Cost-effective safety and fault localization using distributed temporal redundancy
Cost pressure is driving vendors of safety-critical systems to integrate previously distributed systems. One natural approach we have previous introduced is On-Demand Redundancy (ODR), which allows safety-critical and non-critical tasks, traditionally isolated to limit interference, to execute on shared resources. Our prior work has shown that relaxed dedication (RD), one ODR strategy which allows non-critical tasks (NCTs) to execute on idle critical task resources (CTRs), significantly increases NCT throughput. Unfortunately, there are circumstances under which, in spite of this opportunity, it is difficult to effectively schedule NCTs. In this paper, we introduce distributed temporal redundancy (DTR), which allows critical tasks, which traditionally execute in lockstep, to execute asynchronously. In doing so, DTR increases scheduling flexibility, resulting in systems that achieve much closer to the optimal NCT throughput than with relaxed dedication alone; in one set of experimen...
Brett H. Meyer, Benton H. Calhoun, John Lach, Kevi
Added 13 Dec 2011
Updated 13 Dec 2011
Type Journal
Year 2011
Where CASES
Authors Brett H. Meyer, Benton H. Calhoun, John Lach, Kevin Skadron
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