Research of Technology on Making Linux Interrupts Tasked

Linux2.6 has done much work on improving its real-time performance, a new scheduling algorithm with a O(I) time complexity and preemptive kernel have been included. But there are still some disadvantages in its interrupt mechanism, a real-time task may be busy handling interrupts, so it can not complete itself in the expected time. After analyzing its interrupts mechanism, a new solution was designed to make interrupts handle as a kernel thread. A special interrupt can be handled immediately if only it has a higher priority, otherwise it will return and a service thread will take control of it. The interrupt handling process acts as requesting and serving pattern. As test result shows, this solution successfully prevents real-time tasks from disturbing of interrupts, and helps a lot on improving real-time performance.