【摘要】：軌道交通實(shí)時(shí)以太網(wǎng)交換機(jī)作為新一代列車(chē)通信網(wǎng)絡(luò)的重要組成部分,保障了列車(chē)狀態(tài)信息與控制命令的交換和傳輸。實(shí)時(shí)以太網(wǎng)交換機(jī)基于嵌入式Linux系統(tǒng)構(gòu)建,系統(tǒng)啟動(dòng)包括BootLoader啟動(dòng)、內(nèi)核鏡像加載、內(nèi)核啟動(dòng)、用戶(hù)空間初始化4個(gè)部分,其啟動(dòng)耗時(shí)直接影響著交換機(jī)甚至整個(gè)列車(chē)通信網(wǎng)絡(luò)的性能。通過(guò)對(duì)嵌入式Linux啟動(dòng)過(guò)程與JFFS2,UBIFS等文件系統(tǒng)在嵌入式系統(tǒng)上掛載耗時(shí)的研究與分析,針對(duì)交換機(jī)啟動(dòng)過(guò)程提出相應(yīng)的加速策略。采用內(nèi)核裁剪、調(diào)整文件系統(tǒng)類(lèi)型與優(yōu)化系統(tǒng)啟動(dòng)參數(shù)等優(yōu)化策略,使交換機(jī)的啟動(dòng)性能大幅提升。實(shí)驗(yàn)表明,交換機(jī)系統(tǒng)的啟動(dòng)時(shí)間從原有的26.69s減少至7.15s,啟動(dòng)時(shí)間減少了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%.
【作者單位】： 清華大學(xué)軟件學(xué)院;清華大學(xué)計(jì)算機(jī)科學(xué)與技術(shù)系;
【基金】：核高基重大專(zhuān)項(xiàng)(2016ZX01038101)資助
【分類(lèi)號(hào)】：TN915.05;U270.382

【相似文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 耿曉晗;基于實(shí)時(shí)以太網(wǎng)PowerLink的列車(chē)網(wǎng)絡(luò)的實(shí)現(xiàn)研究[D];北京交通大學(xué);2017年

，

本文編號(hào)：2471140