Evaluation of Fault Tolerance Latency from real-time application's perspectives

Information on Fault Tolerance Latency (FTL), which is defined as the total time required by all sequential steps taken to recover from an error, is i mportant to the design and evaluation of fault-tolerant computers used in s afety-critical real-time control systems with deadline information. In this paper, we evaluate FTL in terms of several random and deterministic variab les accounting for fault behaviors and/or the capability and performance of error-handling mechanisms, while considering various fault tolerance mecha nisms based on the trade-off between temporal and spatial redundancy, and u se the evaluated FTL to check if an error-handling policy can meet the Cont rol System Deadline (CSD) for a given real-time application.