嵌入式虚拟机系统镜像存储的研究

发布时间：2018-01-12 08:17

本文关键词：嵌入式虚拟机系统镜像存储的研究　出处：《华中科技大学》2012年硕士论文　论文类型：学位论文

【摘要】：随着计算机技术日新月异的发展，，嵌入式设备各方面的性能都有了很大程度的提高，这为虚拟化技术在嵌入式领域的应用提供了良好的基础。由于嵌入式虚拟化技术在嵌入式软件开发及嵌入式系统安全等方面具有良好的特性，各个厂商相继推出了各种嵌入式虚拟化产品。目前的嵌入式虚拟化系统均采用NAND存储器存放系统镜像，而NAND存储器成本高、读写次数受限的特性带来了系统空间不够、系统镜像更换复杂、设备容易损坏等一系列问题。在嵌入式平台上，如何有效地存放虚拟机系统镜像是当前的热点研究问题之一。嵌入式虚拟机NAND镜像管理系统（VNIMS）采用将虚拟机系统镜像存储在安全数码（SD）卡中的方式，节省了NAND存储器的空间、简化了虚拟机升级的过程。系统基于SCTSCGCL开发的嵌入式虚拟化系统（VNeo），提供对Android操作系统的支持，能够在嵌入式模拟器上稳定的运行两个Android操作系统。VNIMS由NAND镜像生成模块、虚拟机管理器文件系统模块和虚拟机NAND驱动模块三个部分组成，分别完成NAND镜像生成、NAND镜像查找及NAND镜像的读写。通过增加虚拟机管理器文件功能，提供对SD卡文件的直接读写能力，解决了嵌入式设备中内存空间受限的问题；采用监控技术，截获前端驱动命令，自动完成虚拟机镜像到底层SD卡的映射。通过在模拟器上进行功能和性能测试表明，在VNeo系统上能够正常运行两个Android系统，且CPU、内存、文件系统等的性能损耗相对于使用NAND存储器中的系统镜像均在10%以内。
[Abstract]:With the development of computer technology change rapidly, the performance of embedded devices have been greatly improved, which provides a good basis for the application of virtualization technology in the field of embedded system. The embedded virtualization technology has good characteristics in the development of embedded software and embedded system security etc., various manufacturers have introduced a variety of embedded virtualization products. Embedded virtualization systems are currently using NAND memory storage system image, and NAND memory read write characteristics of high cost, limited number of the system brought space is not enough, the system image to replace the complex, a series of problems of equipment easy to damage. In the embedded platform, how to effectively store the virtual machine image system is a hot topic of current research.
Embedded NAND virtual machine image management system (VNIMS) using virtual machine system image stored in the secure digital (SD) card in a way that saves the NAND memory space, simplify the process of upgrading the virtual machine system. The embedded virtualization system based on SCTSCGCL (VNeo), the Android operating system. The simulator can be stabilized in the embedded operating system.VNIMS running two Android generated by the NAND mirror module, virtual machine manager file system module and the NAND virtual machine to drive the three modules, respectively NAND image generation, NAND image search and NAND image to read and write. By adding virtual machine manager file function, provide read directly on the SD card file writing, solves the memory space of embedded devices is limited; the monitoring technology, intercepted front drive command, automatic virtual machine image The mappings of the underlying SD card.
Through the function and performance test on the simulator, it shows that two Android systems can run normally on the VNeo system, and the performance loss of CPU, memory and file system is less than 10% compared with the system mirroring in NAND memory.

【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TP333

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