本文分析了現有構件化嵌入式操作系統所用調度算法存在的缺點，提出搶占閾值調度算法是更為合適的算法。通過仿真實驗比較搶占閾值調度算法、非搶占式調度算法和FIFO(First-In-First-Out)調度算法的性能，證明了上述結論。通過分析現有嵌入式系統構件模型的特點，提出了一種構件模型以及將構件映射成任務的方式，還提出了一種設計方法。整個方案能提高構件化嵌入式操作系統的性能。
關鍵詞 構件化嵌入式操作系統; 搶占閾值調度; FIFO 調度; 構件模型
A Scheme to Improve the Performance of Component Embedded Operating System
Wang Bao-Jin (Institute of Information and Engineering, PLA Information and Engineering University, Zhengzhou 450002) Abstract: In this paper, we analyze the faults of scheduling algorithm used by component embedded real-time operating systems. By comparing the performance of preemption scheduling, non-preemptive scheduling and FIFO scheduling algorithms, we present that preemption scheduling algorithm is more suitable for component
embedded operating systems. By analyzing the properties of existing component models, we propose a component models, a way mapping component to task and a design method. The scheme presented in this paper can improve the performance of component embedded operating system.
Keywords: component embedded operating system, preemption threshold scheduling, FIFO scheduling, component model