中圖分類號： TP311；TP316.2
文獻標識碼： A
DOI：10.16157/j.issn.0258-7998.212461
中文引用格式： 俞冠中，韋雄，田青旺，等. 基于龍芯2K1000的Loongnix系統(tǒng)實時性優(yōu)化方法研究[J].電子技術應用，2022，48(6)：98-102，111.
英文引用格式： Yu Guanzhong，Wei Xiong，Tian Qingwang，et al. Research on method of real-time performance optimization of Loongnix operation system based on Loongson 2K1000[J]. Application of Electronic Technique，2022，48(6)：98-102，111.

Research on method of real-time performance optimization of Loongnix operation system based on Loongson 2K1000

Abstract： Because LoongnixOS is the time-sharing operating system, it cannot meet the requirement of high reliability in industrial automation application which requires to use real-time operating system(RTOS). On the basis of analysis of and study on defects of real-time performance in Linux kernel of LoongnixOS and the method to optimize real-time performance in RT-Preemption patch, the method of real-time transformation of LoongnixOS and optimizing real-time performance of LoongnixOS is put forward, in which a RT-Preempt-Linux kernel is a substitute for original Linux kernel of LoongnixOS. Self-developing real-time performance softwares and Cyclictest are utilized to verify the method. Results of test show that the method can be effective in improvement of real-time performance of LoongnixOS. Real-time performance, including process-switching time, thread-switching time and task-switching delay, of the LoongnixOS transferred to RTOS achieves the grade of microsecond.

Key words : Loongson；Loongnix；Linux；RT-Preempt；real-time opration