嵌入式Linux操作系统的实时性能研究与改进

Research and Improvement of Real-time Performance of Embedded Linux Operation System

从三方面提出改善Linux实时性能的措施:为提高嵌入式应用响应时间精度,提出两种细化Linux时钟粒度方法;为增强系统内核对实时任务的响应能力,增强Linux内核的可抢占性,提出插入抢占方法;为扩展系统适用范围,提出可支持多实时调度策略的调度方案。

The paper gives rise to three aspects to improve the real-time capability of Linux：To improve the time precision for embedded application,two methods for creating accruate timer are proposed.To enhance the response ability of real-time task,inserting preemption points is adopted to enhance the preemptability of Linux kernel.The method of new scheduling plan is discussed and its aim is to support real-time scheduling policies as more as possible and extend system＇s application range.