Error Recovery in a Real-Time Multiprocessor System

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 introdues an algorithm to generate a fault tolerant schedule for the tasks so that they recover errors as retry of checkpointing does.A reliability model is proposed to evahuste the effectiveness of the scheme.