Adaptive Real-Time Scheduling for Mixed Task Sets Based on Total Bandwidth Server

In order to shorten the response times of aperiodic tasks in mixed task sets in real-time systems, this paper proposes an adaptive total bandwidth server (ATBS) algorithm based on aperiodic tasks with varying executing times. This method of reducing response times of aperiodic execution by using predictive execution times instead of worst-case execution times for deadline calculations in the total bandwidth server to obtain shorter deadlines, while ensuring the integrity of periodic tasks. Then, an adaptive total bandwidth server with resource reclaiming which can obtain much shorter response times of aperiodic tasks is proposed. In the evaluation by simulation, the proposed ATBS and ATBSRR techniques shorten average response times for aperiodic tasks, by up to 15.17% and 48.68% compared with the original total bandwidth server technique respectively.