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Memory Positioning of Real-Time Code for Smaller Worst-Case Execution Times
Mälardalen University, School of Innovation, Design and Engineering. Umm Al-Qura University, Makkah, Saudi Arabia .
Imperial College, London, United Kingdom.
2011 (English)In: Proceedings of the 16th IEEE International Conference on Engineering of Complex Computer Systems (ICECCS 2011), 2011, p. 23-32Conference paper, Published paper (Refereed)
Abstract [en]

The process of determining the worst-case execution time (WCET) is challenged in the presence of caches due to their unpredictable effect on the speed of memory references. In particular, when cache conflicts between program lines are common, thrashing occurs and this inadvertently increases the WCET, sometimes significantly so. One way to minimise the cache impact on the WCET, therefore, is to judiciously lay out code and data in memory to avoid cache conflicts. In this paper, we show how to formulate the WCET-aware code placement problem as a Constraint-Optimization Problem (COP), which can then be efficiently solved by off-the-shelf COP solvers. Experimental evaluation of our proposed analysis shows that the proposed analysis successfully identified code positioning that yields the minimum WCET for over half of the problems within manageable time.

Place, publisher, year, edition, pages
2011. p. 23-32
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:mdh:diva-13700DOI: 10.1109/ICECCS.2011.10ISI: 000298664200003Scopus ID: 2-s2.0-79960513317ISBN: 978-076954381-9 (print)OAI: oai:DiVA.org:mdh-13700DiVA, id: diva2:466246
Conference
16th IEEE International Conference on Engineering of Complex Computer Systems, ICECCS 2011; Las Vegas, NV; United States; 27 April 2011 through 29 April 2011
Available from: 2011-12-15 Created: 2011-12-15 Last updated: 2014-05-19Bibliographically approved

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CiteExportLink to record
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Citation style
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  • nn-NB
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