基于T1040的VxWorks中断亲和力研究

Research on VxWorks Interrupt Affinity Based on T1040

通过研究VxWorks中断亲和力,提出一种以均衡中断负载为目标的中断动态路由方法,提高多核处理器T1040系统的中断响应实时性。从硬件上分析T1040特有的多核可编程中断控制器的结构特点,再从软件上分析VxWorks内核下中断亲和力的实现方法,表明可利用中断亲和力实现多核环境下中断的静态路由和动态路由,并提出了一种基于负载均衡的中断动态路由方法。实验结果验证该方法可以有效地均衡多核处理器的中断负载,缩短中断响应时间,从而提高系统的实时性。

The VxWorks interrupt affinity is studied, and an interrupt dynamic routing method is proposed based on load balancing for improving the interrupt response rate of the multi-core processor, T1040. Analysis is made to the architecture of the multi-core programmable interrupt controller of T1040 and its working principle. And then, research is carried out on how to implement interrupt affinity in VxWorks kernel of SMP architecture based on the controller. It shows that the interrupt can be bound to specific processors to obtain the best execution performance by static and dynamic routing under multi-core environment. And an interrupt dynamic routing method is proposed based on interrupt load balancing. The experimental results on the T1040 hardware platform indicate that： The method is effective for balancing the routing interrupts across multiple cores, makes full use of processor resources and improves timeliness of system.