本文分析了現(xiàn)有構(gòu)件化嵌入式操作系統(tǒng)所用調(diào)度算法存在的缺點(diǎn)，提出搶占閾值調(diào)度算法是更為合適的算法。通過仿真實(shí)驗(yàn)比較搶占閾值調(diào)度算法、非搶占式調(diào)度算法和FIFO(First-In-First-Out)調(diào)度算法的性能，證明了上述結(jié)論。通過分析現(xiàn)有嵌入式系統(tǒng)構(gòu)件模型的特點(diǎn)，提出了一種構(gòu)件模型以及將構(gòu)件映射成任務(wù)的方式，還提出了一種設(shè)計(jì)方法。整個(gè)方案能提高構(gòu)件化嵌入式操作系統(tǒng)的性能。
關(guān)鍵詞 構(gòu)件化嵌入式操作系統(tǒng); 搶占閾值調(diào)度; FIFO 調(diào)度; 構(gòu)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