摘要
实时CORBA系统需要解决如何将有限的计算资源和通信资源分配给实时任务,从而保证端到端执行时间的可预测性需求的问题。为了更好地定量分析可预测性,需要为以固定优先级方式调度的、周期性任务的硬实时CORBA系统建模。文中分析了TAO系统和NraD/URI系统的调度模型以及分别由Bettati＆Sun提出和由东南大学提出的端到端调度模型的模型描述和调度方式。在调度模型的描述能力、计算能力、适用范围和存在的联系等方面对上述调度模型进行了分析和比较。
The objective of real-time CORBA systems is to maintain predictability of end-to-end real-time tasks' delay with limited computing resources and communication resources. In order to achieve this, scheduling models should be set up for hard real-time CORBA systems with static priority and periodic tasks. This paper analyzes the scheduling models for TAO system, NraD/URI system, and also end-to-end scheduling models proposed by Bettati & Sun and Southeast University respectively. Further more, these aforementioned scheduling models are compared with respects of description ability, computation ability, scope and their relationships.
出处
《微机发展》
2005年第1期8-10,47,共4页
Microcomputer Development
基金
国家自然科学基金资助项目(69903002)
