You are required to read and agree to the below before accessing a full-text version of an article in the IDE article repository.

The full-text document you are about to access is subject to national and international copyright laws. In most cases (but not necessarily all) the consequence is that personal use is allowed given that the copyright owner is duly acknowledged and respected. All other use (typically) require an explicit permission (often in writing) by the copyright owner.

For the reports in this repository we specifically note that

  • the use of articles under IEEE copyright is governed by the IEEE copyright policy (available at http://www.ieee.org/web/publications/rights/copyrightpolicy.html)
  • the use of articles under ACM copyright is governed by the ACM copyright policy (available at http://www.acm.org/pubs/copyright_policy/)
  • technical reports and other articles issued by M‰lardalen University is free for personal use. For other use, the explicit consent of the authors is required
  • in other cases, please contact the copyright owner for detailed information

By accepting I agree to acknowledge and respect the rights of the copyright owner of the document I am about to access.

If you are in doubt, feel free to contact webmaster@ide.mdh.se

Static Timing Analysis of Real-Time Operating System Code

Fulltext:


Authors:


Publication Type:

Conference/Workshop Paper

Venue:

1st International Symposium on Leveraging Applications of Formal Methods (ISOLA04)


Abstract

Methods for Worst-Case Execution Time (WCET) analysis have been known for some time, and recently commercial tools have emerged. However, the technique has so far not been much used to analyse real production codes. Here, we present a case study where static WCET analysis was used to find upper time bounds for time-critical regions in a commercial real-time operating system. The purpose was not primarily to test the accuracy of the estimates, but rather to investigate the practical difficulties that arise when applying the current WCET analysis methods to this particular kind of code. In particular, we were interested in how labor-intense the analysis becomes, measured by the number of annotations to explicitly constrain the program flow which is necessary to perform the analysis. We also make some qualitative observations regarding what a WCET analysis method would need in order to perform a both convenient and tight analysis of typical operating systems code. In a second set of experiments, we analyzed some standard WCET benchmark codes compiled with different levels of optimization. The purpose of this study was to see how the different compiler optimizations affected the precision of the analysis, and again whether it affected the level of user intervention necessary to obtain an accurate WCET estimate.

Bibtex

@inproceedings{Sandell59,
author = {Daniel Sandell and Andreas Ermedahl and Jan Gustafsson and Bj{\"o}rn Lisper},
title = {Static Timing Analysis of Real-Time Operating System Code},
month = {October},
year = {2004},
booktitle = {1st International Symposium on Leveraging Applications of Formal Methods (ISOLA04)},
url = {http://www.es.mdh.se/publications/59-}
}