Schedulability Test of Scheduling Hard Real-time Period and Sporadic Tasks Unified with EDF Policy
Existing Algorithms hybrid scheduling hard real-time periodic tasks and aperiodic tasks is no guarantee of the deadline of the aperiodic tasks.it is not suitable for scheduling sporadic tasks with hard deadline.Because EDF algorithm with a unified scheduling periodic and sporadic tasks in real-time is optimal.By analyzing and calculating EDF scheduling process of idle time and the maximum time can be stealed,Put forward a schedulability test of unified scheduling periodic and sporadic tasks with EDF policy.Finally,the simulation results obtained the accurately rate of schedulability test and the average response time of sporadic tasks under different load.