Worst Case execution time analysis for Simulink Blocks
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I am working on a project that designs its control algorithm on a Simulink model and generates the code that is then run on a target embedded device.
I am interested in analysing the worst case execution time(WCET) of chunks of my model (divided based on their SampleTime).
The timing model of a target Microcontroller is roughly understood. Since we use Matlab/Embedded coder to generate C-code from the models, Is it possible to run analysis on the generated code to "estimate" WCET?
Does Matlab or anyone provide a toolbox or an addon to do the same?
Estimate need not be accurate to microseconds, A rough estimate is what I am aiming for. Any method that does not involve cataloging the generated code manually for execution time estimation is my ideal solution.
Thanks for any suggestions
Ben Priest on 12 Mar 2021
While model-based development tools like Simulink are often good at testing the model in a simulation, sometimes it’s best to partner with another tool for testing the generated code for on-target timing, and coverage as well. You can either instrument and run the system to capture metrics or use a test harness to execute unit tests of individual components. If you search for 'on-target WCET analysis' in Google for instance you'd find speciality tools and products there
More Answers (1)
Stefanie Schwarz on 4 May 2021
Worst Case Execution Time is not yet a feature provided by MathWorks products. However, our development team is aware of this use case, and there is an existing enhancement request. For now, you will need to use third-party software as outlined by Ben.