本文研究对龙芯3A3000处理器硬件拓扑信息的获取以及对性能管理单元PMU的访问。通过指定事件类型获取PMU中相关事件的发生次数来分析嵌入式应用性能瓶颈产生的原因。通过Eclipse插件技术使性能瓶颈分析工具以插件的方式集成到Eclipse开发环境上,为程序员提供图形用户界面,使程序员能够更直观地获取相关信息,方便其在开发过程中及时发现程序中的性能瓶颈并进行定位。

The research content of this paper is mainly to obtain hardware topology information of LS3A3000 processor and access to the performance management unit.By specifying the event type,the number of related events in the PMU is obtained to analyze the cause of performance bottlenecks.The performance bottleneck analysis tool is integrated into the Eclipse development environment as a plug-in through Eclipse plug-in technology,providing a graphical user interface for programmers,enables programmers to obtain relevant information more intuitively,so that they can find performance bottlenecks in the program in time and locate them during the development process.