In the standard framework for worst-case execution time (WCET) analysis of programs, the main data structure is a single instance of integer linear programming (ILP) that represents the whole program. The instance of this NP-hard problem must be solved to find an estimate forWCET, and it must be refined if the estimate is not tight.We propose a new framework for WCET analysis, based on abstract segment trees (ASTs) as the main data structure. The ASTs have two advantages. First, they allow computing WCET by solving a number of independent small ILP instances. Second, ASTs store more expressive constraints, thus enabling a more efficient and precise refinement procedure. In order to realize our framework algorithmically, we develop an algorithm for WCET estimation on ASTs, and we develop an interpolation-based counterexample-guided refinement scheme for ASTs. Furthermore, we extend our framework to obtain parametric estimates of WCET. We experimentally evaluate our approach on a set of examples from WCET benchmark suites and linear-algebra packages. We show that our analysis, with comparable effort, provides WCET estimates that in many cases significantly improve those computed by existing tools.
105 - 131
ESOP: European Symposium on Programming
London, United Kingdom
2015-04-11 – 2015-04-18
Cerny P, Henzinger TA, Kovács L, Radhakrishna A, Zwirchmayr J. Segment abstraction for worst-case execution time analysis. 2015;9032:105-131. doi:10.1007/978-3-662-46669-8_5
Cerny, P., Henzinger, T. A., Kovács, L., Radhakrishna, A., & Zwirchmayr, J. (2015). Segment abstraction for worst-case execution time analysis. Presented at the ESOP: European Symposium on Programming, London, United Kingdom: Springer. https://doi.org/10.1007/978-3-662-46669-8_5
Cerny, Pavol, Thomas A Henzinger, Laura Kovács, Arjun Radhakrishna, and Jakob Zwirchmayr. “Segment Abstraction for Worst-Case Execution Time Analysis.” Lecture Notes in Computer Science. Springer, 2015. https://doi.org/10.1007/978-3-662-46669-8_5.
P. Cerny, T. A. Henzinger, L. Kovács, A. Radhakrishna, and J. Zwirchmayr, “Segment abstraction for worst-case execution time analysis,” vol. 9032. Springer, pp. 105–131, 2015.
Cerny P, Henzinger TA, Kovács L, Radhakrishna A, Zwirchmayr J. 2015. Segment abstraction for worst-case execution time analysis. 9032, 105–131.
Cerny, Pavol, et al. Segment Abstraction for Worst-Case Execution Time Analysis. Vol. 9032, Springer, 2015, pp. 105–31, doi:10.1007/978-3-662-46669-8_5.