Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment
Journal of the ACM (JACM)
Elastic Scheduling for Flexible Workload Management
IEEE Transactions on Computers
Adaptive Workload Management through Elastic Scheduling
Real-Time Systems
QoS Negotiation in Real-Time Systems and Its Application to Automated Flight Control
RTAS '97 Proceedings of the 3rd IEEE Real-Time Technology and Applications Symposium (RTAS '97)
On Quality of Service Optimization with Discrete QoS Options
RTAS '99 Proceedings of the Fifth IEEE Real-Time Technology and Applications Symposium
Robust aperiodic scheduling under dynamic priority systems
RTSS '95 Proceedings of the 16th IEEE Real-Time Systems Symposium
On task schedulability in real-time control systems
RTSS '96 Proceedings of the 17th IEEE Real-Time Systems Symposium
A resource allocation model for QoS management
RTSS '97 Proceedings of the 18th IEEE Real-Time Systems Symposium
Practical Solutions for QoS-Based Resource Allocation
RTSS '98 Proceedings of the IEEE Real-Time Systems Symposium
Elastic Task Model for Adaptive Rate Control
RTSS '98 Proceedings of the IEEE Real-Time Systems Symposium
A Scalable Solution to the Multi-Resource QoS Problem
RTSS '99 Proceedings of the 20th IEEE Real-Time Systems Symposium
Analysis of a Reservation-Based Feedback Scheduler
RTSS '02 Proceedings of the 23rd IEEE Real-Time Systems Symposium
Adaptive Resource Allocation Control with On-Line Search for Fair QoS Level
RTAS '04 Proceedings of the 10th IEEE Real-Time and Embedded Technology and Applications Symposium
Incorporating Cost of Control into the Design of a Load Balancing Controller
RTAS '04 Proceedings of the 10th IEEE Real-Time and Embedded Technology and Applications Symposium
Hard Real-time Computing Systems: Predictable Scheduling Algorithms And Applications (Real-Time Systems Series)
Optimal State Feedback Based Resource Allocation for Resource-Constrained Control Tasks
RTSS '04 Proceedings of the 25th IEEE International Real-Time Systems Symposium
A control-based middleware framework for quality-of-service adaptations
IEEE Journal on Selected Areas in Communications
QoC elastic scheduling for real-time control systems
Real-Time Systems
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In real-time systems, deadline misses of the tasks cause a degradation in the quality of their results. To improve the quality, we have to allocate CPU utilization for each task adaptively. Recently, Buttazzo et al. address a feedback scheduling algorithm, which dynamically adjusts task periods based on the current workloads by applying a linear elastic task model. In their model, the utilization allocated to each task is treated as the length of a linear spring and its flexibility is described by a constant elastic coefficient. In this paper, we first consider a nonlinear elastic task model, where the elastic coefficient depends on the utilization allocated to the task. We propose a simple iterative method for calculating the desired allocated resource and derive a sufficient condition for the convergence of the method. Next, we apply the nonlinear elastic model to an adaptive fair sharing controller. Finally, we show the effectiveness of the proposed method by computer simulation.