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Design and Implementation of Schedule Mechamism, Semaphore Mechanism and Interrupt Mechanism of VxWorks SMP Kernel

Author: RenQiang
Tutor: WuJiaZhu
School: National University of Defense Science and Technology
Course: Computer technology
Keywords: VxWorks SMP Dispatch Semaphore Interrupt
CLC: TP316.2
Type: Master's thesis
Year: 2009
Downloads: 151
Quote: 1
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Abstract


As integrated circuit technology advances and the development of the processor architecture, is isomorphic to the multi-core processors has been widely used in the field of embedded. However, compared with the rapid development of the hardware, the same basic software configuration of the multi-core processors (especially embedded operating system) is relatively backward. Isomorphic multi-core processors embedded operating system development is difficult, the development of low efficiency. Symmetric multi-processing (SMP) architecture analysis, analysis of the difference between the SMP architecture and AMP architecture, and advanced technology of the SMP architecture are briefly described. Detailed analysis of the Linux SMP system, to provide a reference for the VxWorks SMP system design. Depth analysis of the operating mechanism of the VxWorks kernel, VxWorks kernel of the whole structure, task scheduling module, signal modules, interrupt management module is analyzed in detail, a clear relationship between the call module, multi-core design of the back of the playing good foundation. In this paper, on the basis of the analysis of the key issues facing the various modules of the design process for the SMP architecture features, the VxWorks kernel to support SMP architecture design of the mechanism, given a reasonable solution ideas. Task scheduling, task allocation algorithm based on the global queue, the algorithm to achieve a better VxWorks SMP task scheduling, scheduling overhead has nothing to do with the number of ready tasks, in the case of a heavy load on the system can also smooth work to improve the real-time and predictability; mutex synchronization mechanism, the proposed spin-lock mechanism to implement the new semaphore mechanism, the mechanism better realization the VxWorks SMP of synchronization and mutual exclusion, to solve the deadlock, the kernel synchronization mutex more simple and efficient; DR interrupt in the interrupt management, dynamic routing algorithm, the algorithm allows multiple nuclear deal with different interrupt request, interrupt latency is reduced relative to the single-core systems to improve the system responsiveness. VS simulator test platform on the global queue-based scheduling algorithm spin lock, DR interrupts the correctness of the algorithm functions, and compared with the single-core version of VxWorks kernel mechanism operating results have been satisfactory results. VxWorks SMP architecture-based scheduling, semaphores, interrupt mechanism design and its initial implementation, the development of embedded operating system supports multi-core technology has a certain practical and theoretical significance.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Operating system > Real-time operating system
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