| Abstract
|
Real-time systems usually consist of a set … Real-time systems usually consist of a set of periodic and sporadic tasks. Periodic tasks can be divided into two classes: synchronous and asynchronous. The first type does not define the task first release, contrary to the second. Hence, synchronous periodic tasks are assumed to be released at the worst instant: the critical instant. The schedulability test is reduced to check a single execution of the task under analysis. The integration of sporadic tasks is also straightforward: they are treated as a periodic task with maximum arrival frequency. On the other hand, asynchronous periodic tasks require a test for each release in the hyperperiod and the integration of sporadic tasks is not trivial: the worst release instant is unknown a priori. However, they do not assume that the tasks are released at the worst instant.
This paper presents a new schedulability analysis method based on the Response Time Analysis (RTA) to determine the worst response time of both asynchronous periodic and sporadic tasks, scheduled by a fixed-priority preemptive algorithm with general deadlines. It also presents another method that enables the introduction of a user configurable degree of pessimism, reducing the hyperperiod dependency. mism, reducing the hyperperiod dependency.
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| Author
|
Manuel Coutinho +
, José Rufino +
, Carlos Almeida +
|
| Booktitle
|
Proceedings of the EUROMICRO Conference on Real-Time Systems (ECRTS 2008), Prague, Czech Republic, July 2008. +
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| Key
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Countinho-responseasync +
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| Month
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jul +
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| NumPubDate
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2,008.07 +
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| Project
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Project:DARIO +
, Project:AIR +
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| ResearchLine
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Timeliness and Adaptation in Dependable Systems (TADS) +
|
| Title
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Response Time Analysis of Asynchronous Periodic and Sporadic Tasks Scheduled by a Fixed-Priority Preemptive Algorithm +
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| Type
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inproceedings +
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| Url
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http://www.navigators.di.fc.ul.pt/archive/papers/coutinho-responseasync.pdf +
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| Year
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2008 +
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| Categories |
Publication +
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| Modification dateThis property is a special property in this wiki.
|
14 January 2013 14:41:11 +
|
