Energy-Aware Fault Tolerance in Fixed-Priority Real-Time Embedded Systems

We investigate an integrated approach to fault tolerance anddynamic power management in real-time embedded systems. Faulttolerance is achieved via checkpointing and power management iscarried out using dynamic voltage scaling (DVS). We presentfeasibility-of-scheduling tests for checkpointing schemes for aconstant processor speed as well as for variable processor speeds.DVS is then carried out on the basis of these feasibility analyses.Experimental results show that compared to fault-obliviousmethods, the proposed approach significantly reduces powerconsumption and guarantees timely task completion in the presence of faults.