Abstract
In this paper, a new scheme for recovering errors due to transient faults in a real-time multiprocessor system is presented. The scheme, called dynamic redundancy at the task level, is implemented in a real-time multitasking environment. Utilizing the facilities in the operating system, the scheme makes backup tasks for the primary tasks as redundancy. The paper introduces an algorithm to generate a fault tolerant schedule for the tasks so that they recover errors as retry or checkpointing does. A reliability model is proposed to evahuste the effectiveness of the scheme.
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