The paper analyzes the real time performance of Linux2.6 kernel

because the key restrict factors which are clock

critical section and process scheduling

a new method called high-resolution timer is designed and implemented

spin-lock twin module-control method for critical section be adopted

and modify the 0(1) scheduling algorithm

all which are in order to improve the real-time performance of the Linux system efficiently. The test result indicates the improvements are successful to inprove the real-time performance of the Linux system

and the application range in embeded field is expanded.