System-Scenario-based Design of Dynamic Embedded Systems
In the past decade, real-time embedded systems have become much more complex due to the introduction of a lot of new functionality in one application, and due to running multiple applications
concurrently. This increases the dynamic nature of today's applications and systems, and tightens
the requirements for their constraints in terms of deadlines and energy consumption. State-of-the-art design methodologies try to cope with these novel issues by identifying several most used cases
and dealing with them separately, reducing the newly introduced complexity. This paper presents
a generic and systematic design-time/run-time methodology for handling the dynamic nature of
modern embedded systems, which can be utilized by existing design methodologies to increase
their efficiency. It is based on the concept of system scenarios, which group system behaviors
that are similar from a multi-dimensional cost perspective, such as resource requirements, delay,
and energy consumption, in such a way that the system can be configured to exploit this cost
similarity. At design-time, these scenarios are individually optimized. Mechanisms for predicting
the current scenario at run-time and for switching between scenarios are also derived. This design
trajectory is augmented with a run-time calibration mechanism, which allows the system to learn
on-the-fly during its execution, and to adapt itself to the current input stimuli, by extending the
scenario set, changing the scenario definitions, and both the prediction and switching mechanisms.
To show the generality of our methodology, we show how it has been applied on four very different
real-life design problems. In all presented case studies substantial energy reductions were obtained
by exploiting scenarios.
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System-Scenario-based Design of Dynamic Embedded Systems
S.V. Gheorghita, M. Palkovic, J. Hamers, A. Vandecappelle, S. Mamagkakis, T. Basten, L. Eeckhout, H. Corporaal, F. Catthoor, F. Vandeputte, K. De Bosschere.
ACM Transactions on Design Automation of Electronic Systems, ToDAES. 14(1), Article 3, 45 pages, January 2009. (abstract, pdf).
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