Hybrid measurement-based WCET analysis at the source level using object-level traces

Hybrid measurement-based approaches to worst-case execution time (WCET) analysis combine measured execution times of small program segments using static analysis of the larger software structure. In order to make the necessary measurements, instrumentation code is added to generate a timestamped trace from the running program. The intrusive presence of this instrumentation code incurs a timing penalty, widely referred to as the probe effect. However, recent years have seen the emergence of trace capability at the hardware level, effectively opening the door to probe-free analysis. Relying on hardware support forces the WCET analysis to the object-code level, since that is all that is known by the hardware. A major disadvantage of this is that it is expensive for a typical software engineer to interpret the results, since most engineers are familiar with the source code but not the object code. Meaningful WCET analysis involves not just running a tool to obtain an overall WCET value bu...

• Type: Journal
• Year: 2010
• Where: WCET
• Authors: Adam Betts, Nicholas Merriam, Guillem Bernat
• Keywords: Code, Software Engineering, WCET 2010, WCET Analysis, WCET Value