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Online Periodic Self-Test Scheduling for Real-Time Processor-Based Systems Dependability Enhancement

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1 Author(s)
Gizopoulos, D. ; Dept. of Inf., Univ. of Piraeus, Piraeus

Online periodic self-testing is a cost-effective technique to ensure correct operation of microprocessor-based systems in the field and improve their dependability in the presence of failures caused by components aging/wearout. Effective online self-test tasks in embedded systems should have limited resource requirements: memory, execution time, and power consumption, while at the same time, they should guarantee the highest possible self-test quality levels. These requirements are not always easy to satisfy in real-time embedded systems with hard task deadlines. In this paper, we investigate the maximization of the effective self-test utilization and present solutions for the scheduling of online self-test tasks in hard real-time systems. The primary goal is to guarantee high self-test quality without affecting the deadline requirements of normal hard real-time tasks. We show that with appropriate selection of the periodicity of the self-test tasks, these goals can be met.

Published in:

Dependable and Secure Computing, IEEE Transactions on  (Volume:6 ,  Issue: 2 )

Date of Publication:

April-June 2009

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