Article (Scientific journals)
Estimating Probabilistic Safe WCET Ranges of Real-Time Systems at Design Stages
LEE, Jaekwon; SHIN, Seung Yeob; Nejati, Shiva et al.
2023In ACM Transactions on Software Engineering and Methodology
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Keywords :
Schedulability Analysis; Worst-Case Execution Time; Meta-Heuristic Search; Machine Learning; Search-Based Software Engineering
Abstract :
[en] Estimating worst-case execution times (WCET) is an important activity at early design stages of real-time systems. Based on WCET estimates, engineers make design and implementation decisions to ensure that task execution always complete before their specified deadlines. However, in practice, engineers often cannot provide precise point WCET estimates and prefer to provide plausible WCET ranges. Given a set of real-time tasks with such ranges, we provide an automated technique to determine for what WCET values the system is likely to meet its deadlines, and hence operate safely with a probabilistic guarantee. Our approach combines a search algorithm for generating worst-case scheduling scenarios with polynomial logistic regression for inferring probabilistic safe WCET ranges. We evaluated our approach by applying it to three industrial systems from different domains and several synthetic systems. Our approach efficiently and accurately estimates probabilistic safe WCET ranges within which deadlines are likely to be satisfied with a high degree of confidence.
Research center :
Interdisciplinary Centre for Security, Reliability and Trust (SnT) > Software Verification and Validation Lab (SVV Lab)
ULHPC - University of Luxembourg: High Performance Computing
Disciplines :
Computer science
Author, co-author :
LEE, Jaekwon ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SVV
SHIN, Seung Yeob ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SVV
Nejati, Shiva;  University of Ottawa, Canada > School of Electrical Engineering and Computer Science
BRIAND, Lionel ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > SVV
External co-authors :
yes
Language :
English
Title :
Estimating Probabilistic Safe WCET Ranges of Real-Time Systems at Design Stages
Publication date :
29 March 2023
Journal title :
ACM Transactions on Software Engineering and Methodology
ISSN :
1049-331X
Publisher :
Association for Computing Machinery (ACM), United States
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 694277 - TUNE - Testing the Untestable: Model Testing of Complex Software-Intensive Systems
Funders :
CER - Conseil Européen de la Recherche
CRSNG - Conseil de Recherches en Sciences naturelles et en Génie
CE - Commission Européenne
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since 07 June 2022

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