基于多核处理器的实时操作系统的扩展-计算机应用技术专业论文.docxVIP

ABSTRACTAbstract ABSTRACT Abstract From the born of microprocessor，the promotion of performance is mainly by increasing the frequency of the processor．But the upgrade of frequency demands huge number of transistors，which requires more power consumptions and can cause significant heat dissipation．All of those problems are critical to the embedded system． With this background，multi—COre processors are being paid more and more attentions．A multi-core microprocessor is one which combines two or more independent processors into a single chip；this means it can be got better performance with a fairly lower frequency．In the embedded system，along with the application of multi—core processor， the system software such as Real Time Operation System(RTOS)and parallel compilers are becoming a research hotspot． First of all，this dissertation discusses the realization technique of multi—core processor with hardware view，especially the interface cooperating with the operation system．After that，it analyzes some mainly implementations of the RTOSs which support multi·core processor．And those key points，including the bootloader of the multi—core processor，the task scheduler and the mutex and communications between processors，are described in detail． From the version 2．0，Linux begin to provide the support for Symmetric Multi— Processor Architecture(SMP)．We analyze the implementations of SMP in the Linux． By using the SMP architecture，we extend a RTOS MicroC／OS-11 which only supports single processor to a RTOS named“MicroC／OS-SMP”which can support multi—core processor platform．As the RTOS running on the multi—core processor，MicroC／OS— SMP introduces more complex multi—task scheduler and more smart inter-·processor communication mechanism．This dissertation discusses those key problems about the implementation，and especially discusses the algorithm of the multi—task scheduling on the multi-core platform．We also set the two conditions for a good task scheduling algorithm，and designed a simp