Improving Interference Analysis for Real-Time DAG Tasks Under Partitioned Scheduling

作者：Wu, Yulong; Zhang, Weizhe^*; Guan, Nan; Tang, Yue

来源：IEEE Transactions on Computers, 2022, 71(7): 1495-1506.

DOI：10.1109/TC.2021.3092181

• Real-time systems
• partitioned scheduling
• directed acyclic graph
• response time analysis

Real-time systems with strict timing constraints have been widely applied in many fields. The Directed acyclic graph (DAG) task model has been widely studied and applied to model real-time systems with partial parallelism and precedence constraints in each task. Our paper focuses on the worst-case response time (WCRT) analysis of DAG tasks under partitioned scheduling on multiprocessors. We investigate a parallel structure named Str, which helps obtain more accurate analysis results, and propose a new offline scheduling analysis algorithm named reducing repetitive calculation (RRC). Experiments with synthetic workload are conducted to compare the results calculated by RRC and the state-of-the-art, as well as the observed average response time on a real embedded system. Results show that RRC has better performance in terms of analysis accuracy.

• 单位
  东北大学