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针对遵循ARINC 653接口规范的航空电子分区系统实时性能不强这一问题,借鉴DO—178B分级定义软件安全性的思路和RTLinux的双核架构设计思想,提出了一种新的分区调度机制,即根据分区程序的关键度、紧迫度和完成度,动态设置、调整分区优先级,允许分区实时抢占调度。策略扩展了时间分区的概念,增强了系统的调度灵活性,提高了系统实时性能,不足之处是会弱化系统的可预测性。
In view of the problem that real-time performance of avionics zoning system following ARINC 653 interface specification is not strong, a new partition scheduling mechanism is proposed based on the idea of DO-178B hierarchical definition of software security and dual-core architecture of RTLinux. Partition the program’s criticality, urgency and completion, dynamic settings, adjust the partition priority, allowing partition real-time preemptive scheduling. The strategy expands the concept of time partition, enhances the scheduling flexibility of the system and improves the real-time performance of the system. The disadvantage is that the system’s predictability will be weakened.