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Prototyping and Code Synthesis of Hierarchically Scheduled Systems using TIMES
Publication Type:
Journal article
Venue:
Journal of Convergence (Consumer Electronics)
Publisher:
FTRA Publishing
Abstract
In hierarchical scheduling a system is organized as
a tree of nodes, where each node schedules its child nodes.
A node contains tasks and/or subsystems, where a subsystem
is typically developed by a development team. Given a system
where each part is subcontracted to different developers, they can
benefit from hierarchical scheduling by parallel development and
simplified integration of subsystems. Each team should have the
possibility to test their system before integration. Hence, we show
how a node, in a hierarchical scheduling tree, can be analyzed
in the Times tool by replacing all interference from nodes with
a small set of higher priority tasks. We show an algorithm that
can generate these tasks, including their parameters. Further,
we use the Times code-generator, in combination with operating
system extensions, to generate source code that emulates the
scheduling environment for a subsystem, in an arbitrary level
in the tree. Our experiments include two example systems. In
the first case we generate source code for an industrial oriented
platform (VxWorks) and conduct a performance evaluation. In
the second example we generate source code that emulates the
scheduling environment for a video application, running in Linux,
and we perform a frame-rate evaluation.
Bibtex
@article{Asberg2001,
author = {Mikael {\AA}sberg and Thomas Nolte and Paul Pettersson},
title = {Prototyping and Code Synthesis of Hierarchically Scheduled Systems using TIMES},
volume = {1},
number = {1},
pages = {77--86},
month = {December},
year = {2010},
journal = {Journal of Convergence (Consumer Electronics)},
publisher = {FTRA Publishing},
url = {http://www.es.mdu.se/publications/2001-}
}