關鍵詞：嵌入式操作系統(tǒng)，Linux內(nèi)核，進程
Research on the Kernel of Embedded Operating System
Abstract
Embedded operating system is the key part of embedded system and the outer representation of system functions. It controls all the resources of the whole system and provides the foundation for exploiting and applying programs. Linux operating system possesses a variety of good characteristics: for example, the formal code is free and the kernel of it is steady and highly effective. These advantages make the research on embedded operating system, which is based on Linux, a research strategy that is highly effective and of broad market prospects.
Linux kernel is rich in resources, functions and stable when it works. This paper introduces the work principles of the Virtual File System module, the process of communication module and the network interface module. In its in-depth modules based on the analysis, it focuses on an analysis of the kernel memory management module and process management module. Through doing researching on the process of Linux for real-time scheduling algorithm, this paper presents a dynamic priority based on the process of realization of program scheduling. The algorithm presents a dynamic priority of thinking, which can change the process priority according to the state of the process and better adapt the real-time requirements. This algorithm has strong advantages in improving the real-time system. This paper designs and implements the algorithm and the simulation test confirms its good performances. Finally, this paper introduces the compiling, upgrading and transplanting methods on the Linux kernel.
