Algorithms for Scheduling Imprecise Computations
Computer - Special issue on real-time systems
Modeling of dynamic systems
Optimal composition of real-time systems
Artificial Intelligence
Signals & systems (2nd ed.)
System identification (2nd ed.): theory for the user
System identification (2nd ed.): theory for the user
Scheduling Algorithms for Multiprogramming in a Hard-Real-Time Environment
Journal of the ACM (JACM)
Hard Real-Time Computing Systems: Predictable Scheduling Algorithms and Applications
Hard Real-Time Computing Systems: Predictable Scheduling Algorithms and Applications
Digital Control of Dynamic Systems
Digital Control of Dynamic Systems
Deadline Scheduling for Real-Time Systems: Edf and Related Algorithms
Deadline Scheduling for Real-Time Systems: Edf and Related Algorithms
Feedback–Feedforward Scheduling of Control Tasks
Real-Time Systems
Time-Constrained Query Processing in CASE-DB
IEEE Transactions on Knowledge and Data Engineering
APPROXIMATE: A Query Processor that Produces Monotonically Improving Approximate Answers
IEEE Transactions on Knowledge and Data Engineering
An Automated Profiling Subsystem for QoS-Aware Services
RTAS '00 Proceedings of the Sixth IEEE Real Time Technology and Applications Symposium (RTAS 2000)
Differentiated Caching Services; A Control-Theoretical Approach
ICDCS '01 Proceedings of the The 21st International Conference on Distributed Computing Systems
A Feedback Control Approach for Guaranteeing Relative Delays in Web Servers
RTAS '01 Proceedings of the Seventh Real-Time Technology and Applications Symposium (RTAS '01)
A Feedback Control Architecture and Design Methodology for Service Delay Guarantees in Web Servers
A Feedback Control Architecture and Design Methodology for Service Delay Guarantees in Web Servers
Real-Time Databases and Data Services
Real-Time Systems
RTAS '05 Proceedings of the 11th IEEE Real Time on Embedded Technology and Applications Symposium
Specification and Management of QoS in Real-Time Databases Supporting Imprecise Computations
IEEE Transactions on Computers
Robust fuzzy CPU utilization control for dynamic workloads
Journal of Systems and Software
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
QoC elastic scheduling for real-time control systems
Real-Time Systems
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In recent years a new class of soft real-time applications operating in unpredictable environments has emerged. Typical for these applications is that neither the resource requirements nor the arrival rates of service requests are known or available a priori. It has been shown that feedback control is very effective to support the specified performance of dynamic systems that are both resource insufficient and exhibit unpredictable workloads. To efficiently use feedback control scheduling it is necessary to have a model that adequately describes the behavior of the system. In this paper we experimentally evaluate the accuracy of four linear time-invariant models used in the design of feedback controllers. We introduce a model (DYN) that captures additional system dynamics, which a previously published model (STA) fails to include. The accuracy of the models are evaluated by validating the models with regard to measured data from the controlled system and through a set of experiments where we evaluate the performance of a set of feedback control schedulers tuned using these models. From our evaluations we conclude that second order models (e.g., DYN) are more accurate than first order models (e.g. STA). Further we show that controllers tuned using second order models perform better than controllers tuned using first order models.