【摘要】 本文针对并行飞行训练模拟器任务系统的结构特点,探讨一种有效的任务调度方法.首先建立了并行计算机系统的仿真环境,用以模拟任务在系统中的实际执行过程.然后在仿真环境中进行模拟的动态任务调度,得到能够反映任务运行情况的静态任务调度方案,我们称之为准动态的任务调度.这种方法既可以象动态任务调度那样,考虑系统因竞争、同步、处理机间的通信等动态情况的影响,得到高效率的任务调度方案,又不占用任务的运行时间,增加额外的开销,具有静态任务调度的优点.同时,在仿真环境中还可以对各种同步方式,任务的分解和调度策略,以及并行计算机结构进行比较和优化.文中以Q6飞行训练模拟器为例,说明了准动态任务调度方法的原理和使用过程.更多还原

【Abstract】 The main purpose of this paper is to explore a effective task scheduling for parallel flight training simulators. First of all, a simulation environment of the parallel computer system used in the simulator is set up to simulate the real execution process of the tasks in the system. The simulated dynamic task scheduling is then performaed in the simulation environment so as to obtain a static task scheduling in which the dynamic execution of tasks is considered, which is called quasi-dynamic task scheduling. Just like dynamic task scheduling, our task schedule strategy can obtain very effective schedulings because the effect of dynamic condition, such as the synchronization, the contention for shared resources, communication between processors and so on, can be included in the scheduling. On the other hand, the scheduling is obtained by off-line, which has the benefits of static task scheduling. In addition, various synchronization methods, task schedule strategies, and multiprocessor arehitectures can be compared and optimized according to the simulation environment of the parallel computer system. In this paper, we will take Q6 flight training simulator as an example to explain the principle and use of the quasi-dynamic task schedule method.更多还原