T-L plane-based real-time scheduling for homogeneous multiprocessors

We consider optimal real-time scheduling of periodic tasks on multiprocessors—i.e., satisfying all task deadlines, when the total utilization demand does not exceed the ion capacity of the processors. We introduce a novel abstraction for reasoning about task execution behavior on multiprocessors, called T-L plane and present T-L plane-based real-time scheduling algorithms. We show that scheduling for multiprocessors can be viewed as scheduling on repeatedly occurring T-L planes, and feasibly scheduling on a single T-L plane results in an optimal schedule. Within a single TL plane, we analytically show a sufficient condition to provide a feasible schedule. Based on these, we provide two examples of T-L plane-based real-time scheduling algorithms, including non-work-conserving and work-conserving approaches. Further, we establish that the algorithms have bounded overhead. Our simulation results validate our analysis of the algorithm overhead. In addition, we experimentally show that o...

• Type: Journal
• Year: 2010
• Where: JPDC
• Authors: Hyeonjoong Cho, Binoy Ravindran, E. Douglas Jensen
• Keywords: JPDC 2010, Real-time Scheduling, Real-time Scheduling Algorithms, T-l Plane