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Volume 19 (2022)
Volume 19, (In Progress)
Pg 1 - 11 (June 2022)
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Advances in Computer Science and Engineering
Advances in Computer Science and Engineering
Volume 2, Issue 3, Pages 267 - 284 (November 2008)
AN IMPROVED REAL TIME FAULT-TOLERANT SCHEDULING ALGORITHM FOR PRECEDENCE CONSTRAINED TASKS IN HETEROGENEOUS SYSTEMS
Rakesh K. Bansal (India), Kawaljeet Singh (India) and Savina Bansal (India)
Abstract:
In this paper, an improved version of e-FRD [2] (efficient 1-Fault tolerant Reliability Driven) algorithm is proposed and analyzed for scheduling deadline and precedence constrained task graphs under an arbitrary processor failure constraint. A new and more effective decision parameter is introduced that takes care of precedence, heterogeneity and reliability factors all in one and helps in taking more judicious scheduling decision at compiletime. The algorithm performs well under both Hard and Soft deadline constraints. Its performance has been analyzed through exhaustive simulations and compared with the baseline e-FRD algorithm for a set of random task graphs for a heterogeneous computing platform. The performance is quite appreciable in terms of task acceptance ratio and average makespan though with marginal degradation in reliability cost.
Keywords and phrases:
fault tolerance in real time systems, scheduability, real time scheduling, hard and soft real time systems.
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