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Analysis and Programming of Kernel for Embedded Systems

Journal of Software Engineering and Applications 2014年第1期7卷 14-26页

作者： Kyumann Im Woonchul Ham Division of Electronics and Information Engineering of Chonbuk National University Duckjin-Dong Jeonju-city South Korea

In this study, we present a miniOS kernel implemented via analysis of the context switching, the scheduler, and the memory management of the original OS kernel for an embedded system based on ARM core. Since this is a large subject, we have limited our scope to them only that made up an embedded operating system. The implemented miniOS kernel is composed only by them, to the exclusion of all other functions of the original kernel. Our goal is to modify the OS kernel depending on the product function. The implementation method of the miniOS kernel can be applicable to any OS being mounted based on the ARM core. Modifying the kernel depending on the product function can improve the OS booting speed as well as save the system memory. The functions of the scheduler, the context switching, and the memory management are described with the source in each section. The miniOS kernel was implemented in the Assembly and C language and was verified through the build and the test. The results are shown in the Section 5.

关键词： Context Switching scheduler Kernel OS Timer Embedded System

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Analysis of Container Formation and Delays in the Centrally Scheduled Photonic Burst Switch

Analysis of Container Formation and Delays in the Centrally ...

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The 19th International Teletraffic Congress-ITC19

作者： Amin R. Mazloom Kalyan Basu Center for Research in Wireless Mobility and Networking （CReWMaN） University of Texas at Arlington TEXASUSA Center for Research in Wireless Mobility and Networking （CReWMaN） University of Texas at Arlington TEXASUSA

＜正＞In this paper the concept of Container {fixed size macro data unit} is used to photonic burst switch network This Container is tailored to integrate the existing multiple optical protocols stack as an intermediate layer between optical and link layers. The objective of Container based optical burst switching is to eliminate the O/E/0 conversion in the core optical network to create a collision free stateless core. In addition the concept takes advantage of the wireless link’s delay to minimize the necessity of long Fiber Delay Lines （FDL） in a mesh topology photonic network. This is made possible by a centrally scheduled edge switch that periodically assigns optical burst slots between the two nodes to carry the containers. The architecture is analyzed for its container formation delay and other performance dynamics like the container size.

关键词： Container Photonic Network scheduler Burst SOA G/D/1

来源： cnki会议评论