ARM微处理器中断响应时间的实验研究  

Experimental Research on Interrupt Latency Time of ARM Microprocessor

作　　者：尹旭峰[1] 苑士华[1] 胡纪滨[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《计算机工程》2011年第4期252-254,263,共4页Computer Engineering

摘　　要：介绍ARM微处理器S3C2440A的中断处理机制,设计一种实验测定中断响应时间的方法,实测了理想状态下S3C2440A的快速中断FIQ和标准中断IRQ的响应时间,并对实验数据进行分析处理,给出实测数据的拟合函数,从而得出以下结论:FIQ与IRQ的中断响应时间基本相等,中断响应时间与CPU的运行时钟无关,只与中断控制器的运行时钟频率呈反比关系,启用高速缓存时的中断响应时间不到禁用高速缓存时的1/3。The interrupt processing of ARM microprocessor S3C2440A is introduced briefly, An experiment to measure the interrupt latency time of FIQ and IRQ is designed and accomplished. Two fitting functions of the experimental data are given. It can be concluded that the interrupt latency lime of FIQ and IRQ is almost the same, They have little relationship with the processor cycles and are only in iaverse proportion to the frequency of the clock of the interrupt controller. The interrupt latency time while the cache is enabled is less than 1/3 of that while the cache is disabled.

关 键 词：中断 响应 微处理器 精简指令集计算机 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]