轨道交通实时以太网交换机启动性能的分析与优化
发布时间：2019-05-07 13:54
【摘要】：轨道交通实时以太网交换机作为新一代列车通信网络的重要组成部分,保障了列车状态信息与控制命令的交换和传输。实时以太网交换机基于嵌入式Linux系统构建,系统启动包括BootLoader启动、内核镜像加载、内核启动、用户空间初始化4个部分,其启动耗时直接影响着交换机甚至整个列车通信网络的性能。通过对嵌入式Linux启动过程与JFFS2,UBIFS等文件系统在嵌入式系统上挂载耗时的研究与分析,针对交换机启动过程提出相应的加速策略。采用内核裁剪、调整文件系统类型与优化系统启动参数等优化策略,使交换机的启动性能大幅提升。实验表明,交换机系统的启动时间从原有的26.69s减少至7.15s,启动时间减少了73.2%。
[Abstract]:As an important part of the next generation train communication network, the real-time Ethernet switch of rail transit ensures the exchange and transmission of train status information and control commands. Real-time Ethernet switch is based on embedded Linux system. System startup includes BootLoader startup, kernel image loading, kernel boot, user space initialization. The startup time has a direct impact on the performance of the switch and even the entire train communication network. Based on the research and analysis of the time-consuming of embedded Linux boot process and JFFS2,UBIFS file system mounting on embedded system, the corresponding acceleration strategy is put forward for the switch startup process. Using kernel tailoring, adjusting file system type and optimizing system startup parameters and other optimization strategies, the switch startup performance is greatly improved. The experimental results show that the startup time of the switch system is reduced from 26.69 s to 7.15 s, and the startup time is reduced by 73.2%.
【作者单位】： 清华大学软件学院;清华大学计算机科学与技术系;
【基金】：核高基重大专项(2016ZX01038101)资助
【分类号】：TN915.05;U270.382
本文编号：2471140
[Abstract]:As an important part of the next generation train communication network, the real-time Ethernet switch of rail transit ensures the exchange and transmission of train status information and control commands. Real-time Ethernet switch is based on embedded Linux system. System startup includes BootLoader startup, kernel image loading, kernel boot, user space initialization. The startup time has a direct impact on the performance of the switch and even the entire train communication network. Based on the research and analysis of the time-consuming of embedded Linux boot process and JFFS2,UBIFS file system mounting on embedded system, the corresponding acceleration strategy is put forward for the switch startup process. Using kernel tailoring, adjusting file system type and optimizing system startup parameters and other optimization strategies, the switch startup performance is greatly improved. The experimental results show that the startup time of the switch system is reduced from 26.69 s to 7.15 s, and the startup time is reduced by 73.2%.
【作者单位】： 清华大学软件学院;清华大学计算机科学与技术系;
【基金】：核高基重大专项(2016ZX01038101)资助
【分类号】：TN915.05;U270.382
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