Abstract: “This paper reviews scheduling algorithm available in RTOS to schedule the tasks during execution in the Real Time System considering the static priority and evolution in the static priority scheduling in last decade. Real Time Operating System (RTOS) success depends on completion of task in given deadline. Real Time Operating System (RTOS) used, where we require specific application that meet there deadline with keeping logically correct results as an important constraint. Scheduling can be done in static or dynamic manner. According to priority, scheduling can also be classified as static priority and dynamic priority in dynamic scheduling. This paper concentrates on the static priority scheduling algorithm and the changes made or suggested by researchers and the proposed way to overcome from this problem”

Keywords: RTOS, Scheduling Algorithm, Deadline, Dynamic, Static Priority