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Approximate Worst-Case Execution Time Analysis for Early Stage Embedded Systems Development
Publication Type:
Conference/Workshop Paper
Venue:
Proc. of the Seventh IFIP Workshop on Software Technologies for Future Embedded and Ubiquitous Systems (SEUS 2009)
Publisher:
Lecture Notes in Computer Science (LNCS), Springer
Abstract
A Worst-Case Execution Time (WCET) analysis finds upper bounds for the execution time of
programs. Reliable WCET estimates are essential in the development of safety-critical embedded systems, where
failures to meet timing deadlines can have catastrophic consequences.Traditionally, WCET analysis is applied only in the late stages of
embedded system software development. This is problematic, since WCET
estimates are often needed already in early stages of system
development, for example as inputs to various kinds of high-level
embedded system engineering tools such as modelling and component
frameworks, scheduling analyses, timed automata, etc. Early WCET
estimates are also useful for selecting a suitable processor
configuration (CPU, memory, peripherals, etc.) for the embedded system.If early WCET estimates are missing, many of these early design decisions have to
be made using experience and ``gut feeling''. If
the final executable violates the timing bounds assumed in earlier system
development stages, it may result in costly system
re-design.This paper presents a novel method to derive approximate WCET
estimates at early stages of the software development process. The
method is currently being implemented and evaluated. The method
should be applicable to a large variety of software engineering tools
and hardware platforms used in embedded system development, leading to shorter development
times and more reliable embedded software.
Bibtex
@inproceedings{Gustafsson1646,
author = {Jan Gustafsson and Peter Altenbernd and Andreas Ermedahl and Bj{\"o}rn Lisper},
title = {Approximate Worst-Case Execution Time Analysis for Early Stage Embedded Systems Development},
editor = {Sunggu Lee, Priya Narasimhan},
pages = {308--319},
month = {November},
year = {2009},
booktitle = {Proc. of the Seventh IFIP Workshop on Software Technologies for Future Embedded and Ubiquitous Systems (SEUS 2009) },
publisher = {Lecture Notes in Computer Science (LNCS), Springer},
url = {http://www.es.mdu.se/publications/1646-}
}