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Execution-Time Properties of a Hybrid Controller (2000)
| Content Provider | CiteSeerX |
|---|---|
| Author | Persson, Patrik Persson, Patrik Cervin, Anton Cervin, Anton Eker, Johan Eker, Johan |
| Abstract | We are interested in gaining more knowledge about the execution-time requirements of real-time control tasks, and this paper presents a system for gathering statistics of the execution times of real-time tasks. The system allows real-time code to be instrumented in order to gather, analyze, and present execution-time statistics. It has been used to instrument an existing hybrid controller to gather execution-time statistics. These statistics indicate that the worst-case execution times of the controller occur in conjunction with reference and mode changes, and that a scheduling based on that worst-case execution time leads to poor CPU utilization. 1. Background Present real-time scheduling strategies are typically based on the assumption that the execution-time demands of a process remain constant over time. This may be true for some applications, but not all. Hybrid controllers, for example, switch between PID control and other (potentially time-consuming) control algorith... |
| File Format | |
| Language | English |
| Publisher Date | 2000-01-01 |
| Access Restriction | Open |
| Subject Keyword | Hybrid Controller Execution-time Property Worst-case Execution Time Execution-time Requirement Execution-time Demand Background Present Real-time Scheduling Strategy Execution Time Controller Occur Pid Control Present Execution-time Statistic Poor Cpu Utilization Execution-time Statistic Real-time Task Real-time Control Task Real-time Code Process Remain Control Algorith Mode Change |
| Content Type | Text |
| Resource Type | Technical Report |
