【摘要】 针对单处理器系统的周期性实时任务集,基于非精确计算,提出FT/FA(Fault Tolerance/FrequencyAssurance)调度方法.该方法对任务的强制部分进行容错,保证出错时仍能满足任务的时限要求;采用对可选部分的执行频率进行保证,保证任务的计算质量.此外,给出了FT/FA方法的可调度条件,并分析了该调度方法的性能.更多还原

【Abstract】 For the periodic real-time task sets on uniprocessor systems,FT/FA(fault-tolerance/frequency assurance) scheduling of imprecise computation was proposed.The mandatory parts in the tasks can tolerate fault and the timing constraints of the tasks can be satisfied even if any fault occurs.The executing frequencies of the optional parts in the tasks can be assured so that the executed tasks are superior in quality.The conditions of scheduling for FT/FA approaches were given.The performance of this approach was also analyzed by the simulation tests.更多还原