Study on Improving Real Time Performance of Linux Embedded System

With the development of embedded system, Linux operation system shows its excellent application prospect. However, for embedded application system, Linux has some disadvantages such as close interrupt, timedivision scheduler and time uncertainty in virtual file system and so on. Virtual computer technology is applied, i.e. add a simulation program to replace bottom interrupt program in Linux, use a smaller realtime kernel and Linux kernel to share control processor together, and adopt interrupt simulating technology etc. On the basis, we implement system design, and write corresponding program. Measurement result shows that improved realtime Linux can meet demand of realtime task operation system.