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Licentiate thesis proposal:Improvements of the Flow Analysis in WCET Tools

Fulltext:


Authors:

Christer Sandberg

Research group:

Programming Languages

Publication Type:

Report

Abstract

The worst case execution times, the WCET, are often essential to know for tasks that have to fulfill deadlines. Such tasks can often be found in real time systems. In order to calculate the WCET, flow constraints, like maximum iterations of loops, needs to be known. Entering all such flow constraints to a WCET tool require a lot of work for the user to be done. Therefore methods for achieving flow constraints automatically are important. However, most of today's WCET tools require manual annotations of loops for real sized programs. One of the reasons is that the most powerful analysis methods are too costly in terms of computation power. This paper suggest three approaches to reduce the required computations to be done, in order to be able to analyze larger programs.- Reduce the program size by removing all parts of the program that do not affect the control flow. - Find syntactical methods with low calculation cost in order to find upper loop bounds. - Make a detailed study of industrial code in order to find commonly used language constructs. The result of this work can be used to guide the syntactical methods, so it will be performed prior to that.This work will result in three papers and a licentiate thesis.

Bibtex

@techreport{Sandberg689,
author = {Christer Sandberg},
title = {Licentiate thesis proposal:Improvements of the Flow Analysis in WCET Tools},
month = {February},
year = {2005},
url = {http://www.es.mdu.se/publications/689-}
}