| 1. |
- Mäki-Turja, Jukka, et al.
(författare)
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Efficient Resonse-Time Analysis for Tasks with Offset
- 2004
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Ingår i: Proceedings - IEEE Real-Time and Embedded Technology and Applications Symposium. - 0769521487 ; , s. 462-471
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We present a method that enables an efficient implementation of the approximative response-timeanalysis (RTA) for tasks with offsets presented by Tindell [(1992)] and Palencia Gutierrez et al. [(1998)]. The method allows for significantly faster implementations of schedulability tools using RTA. Furthermore, reducing computation time, from tens of milliseconds to just a fraction of a millisecond, as we show, is a step towards online RTA in for example admission control systems. We formally prove that our reformulation of earlier presented equations is correct and allow us to statically represent parts of the equation, reducing the calculations during fix-point iteration. We show by simulations that the speedup when using our method is substantial. When task sets grow beyond a trivial number of tasksand/or transactions a speed-up of more than 100 times (10 transactions and 10 tasks/transaction) compared to the original analysis can be obtained.
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| 2. |
- Mäki-Turja, Jukka, et al.
(författare)
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Tighter Response-Times for Tasks with Offsets
- 2004
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Ingår i: Real-time and Embedded Computing Systems and Applications Conference (August 2004).
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Möller, Anders, et al.
(författare)
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Evaluation of Component Technologies with Respect to Industrial Requirements
- 2004
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Ingår i: Conference Proceedings of the EUROMICRO. - 0769521991 ; , s. 56-63
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- We compare existing component technologies for embedded systems with respect to industrial requirements. The requirements are collected from the vehicular industry, but our findings are applicable to similar industries developing resource constrained safety critical embedded distributed real-time computer systems. One of our conclusions is that none of the studied technologies is a perfect match for the industrial requirements. Furthermore, no single technology stands out as being a significantly better choice than the others; each technology has its own pros and cons. The results of our evaluation can be used to guide modifications or extensions to existing technologies, making them better suited for industrial deployment. Companies that want to make use of component-based software engineering as available today can use this evaluation to select a suitable technology.
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| 4. |
- Möller, Anders, et al.
(författare)
-
Industrial Requirements on Component Technologies for Embedded Systems
- 2004
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Ingår i: Component-Based Software Engineering. - Berlin, Heidelberg : Springer Berlin Heidelberg. - 9783540219989 ; , s. 146-161
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- Software component technologies have not yet been generally accepted by embedded-systems industries. In order to better understand why this is the case, we present a set of requirements, based on industrial needs, that are deemed decisive for introducing a component technology. The requirements we present can be used to evaluate existing component technologies before introducing them in an industrial context. They can also be used to guide modifications and/or extensions to component technologies, to make them better suited for industrial deployment. One of our findings is that a major source of requirements is non-technical in its nature. For a component technology to become a viable solution in an industrial context, its impact on the overall development process needs to be addressed. This includes issues like component life-cycle management, and support for the ability to gradually migrate into the new technology.
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