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Analysing Response-Times for Tasks with Offsets, Tight Resluts at Fast Speed

Fulltext:


Authors:

Jukka Mäki-Turja, Mikael Sjödin

Publication Type:

Report - MRTC

ISRN:

MDH-MRTC-161/2004-1-SE

Abstract

We present an novel method to calculate approximate upper bounds on the worst-case response-times for tasks which may have offset relations amongst them. The response-times calculated are tighter (i.e lower) than previous methods and the calculation time is significantly shorter. We have previously obtained both of these benefits in isolation, and in this paper the two methods are combined to form a tight and fast response-time analysis for tasks with offsets. In a comprehensive simulation study we explore both the tightness and analysis speed of; exact analysis for tasks with offsets, traditional approximate analysis, our previous fast analysis, our previous tight analysis, and the novel combined tight and fast analysis. The results show that adding tightness to our fast analysis has a insignificant (albeit negative) impact on the analysis time. Since the tight and fast analysis always calculates the same response-times as those of the tight analysis, our tight and fast method is the preferred method to use in any situation high-quality response-time estimates are needed within reasonable analysis time.

Bibtex

@techreport{Maki-Turja599,
author = {Jukka M{\"a}ki-Turja and Mikael Sj{\"o}din},
title = {Analysing Response-Times for Tasks with Offsets, Tight Resluts at Fast Speed},
number = {ISSN 1404-3041 ISRN MDH-MRTC-161/2004-1-SE},
month = {May},
year = {2004},
url = {http://www.es.mdu.se/publications/599-}
}