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首页> 外文期刊>IEEE Aerospace and Electronic Systems Magazine >Real time recovery of fault tolerant processing elements
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Real time recovery of fault tolerant processing elements

机译：实时恢复容错处理元素

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A critical problem in the design of ultra-reliable fault tolerant systems is that of how to bring a redundant member back on-line, after a transient fault, without degrading critical real-time functions. Recovery from transients is imperative to maintain necessary system reliability in the face of transient errors which have been estimated to occur at a rate of 5 to 100 times that of permanent failures. Excessive delays associated with recovery become a problem when as much as 1 Mbytes of RAM in the faulty processor must be made congruent with the processing majority while maintaining full functionality of critical, real-time control algorithms. This paper describes a hardware assisted recovery technique which uses memory “tags” to determine which memory segments need to be restored such that recovery can be performed incrementally without affecting real-time operational tasks. Also presented is performance data associated with this technique's application to a Draper Laboratory quad-redundant processor responsible for vehicle control of a manned undersea vehicle
机译：超可靠的容错系统设计中的一个关键问题是在出现瞬时故障后如何使冗余成员重新联机，而又不降低关键的实时功能。面对瞬态错误，必须从瞬态恢复以保持必要的系统可靠性，瞬态错误的发生率估计是永久性故障的5到100倍。当必须使有故障的处理器中多达1 MB的RAM与大多数处理器保持一致，同时保持关键的实时控制算法的全部功能时，与恢复相关的过度延迟就成为一个问题。本文介绍了一种硬件辅助的恢复技术，该技术使用内存“标签”来确定需要恢复的内存段，以便可以增量执行恢复而不影响实时操作任务。还介绍了与这项技术在负责载人海底车辆的车辆控制的德雷珀实验室四重处理器上的应用相关的性能数据

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