In the scheduler real - time tasks are divided in to 2 subsets : a scheduabletasks in which task feasibility can be guaranteed and a manageabletasks in which task feasibility is not theoretical guaranteed 在实时任务调度器中将实时任务划分为可调度性能够保证的scheduabletasks和可调度性不能保证的manageabletasks两个集合,分别采用不同的调度策略。