嵌入式Linux内核实时调度策略改进方案

The Improvement Scheme of Real-time Scheduling Strategy Based on Embedded Linux Kernel

中断线程化及SMP技术是两种嵌入式Linux实时性改造方案,它可以提高嵌入式Linux的实时性,分析了这两种方案存在的问题,并在这两种改造方案的基础上分别提出了等待队列优先权排队及SMP的优先级任务动态平衡两种改进方案,以提高嵌入式Linux的实时性,测试结果表明对提高嵌入式Linux实时性有显著效果.

Interrupt thread and SMP are two embedded real-time improvement schemes for Linux. They can improve the real-time performance of embedded Linux, but they also have shortcomings. This paper analyzes the existing problems of the two methods, and put forward the waiting queue priority queuing and priority-dynamic balance of SMP respectively based on these two reconstruction schemes to improve the real-time performance of embedded Linux. The tests＇ results show that the schemes have obvious effect on improving the real-time performance of embedded Linux.