Abstract: A realtime improvement scheme of Linux 2.6 kernel is proposed on the basis of the method of controlling execution time of interrupt, this scheme can resolve the problem of long response time caused by frequent interrupts in the execution process of Linux realtime tasks. By analyzing Linux 2.6 kernel interrupt mechanism as well as the interruption mechanism of the kernel branded Ingo Molar realtime kernel patch, and arranging an appropriate execution time for interrupt by comparing with the current tasks realtime priority, the task’s realtime res ponse was realized. Experimental results show that the interrupt response time of improvementscheme is shorter than that of the kernel with branded Ingo Molar realtime kernel patch.

Key words: Linux, realtime performance, tasked interrupts, realtime priority