MEX File slows Simulink

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Fayez Alruwaili
Fayez Alruwaili on 22 Mar 2021
Dear all,
I have been able to build a mex function that interface a c++ code and input realtime data into simulink using the coder.extrinsic commnad. It works fine although the main issue is the time has slowed extensively. Any ideas on how to solve this issue?
Thanks so much

Answers (1)

Pratheek Punchathody
Pratheek Punchathody on 30 Mar 2021
Edited: Pratheek Punchathody on 5 Apr 2021
As per my understanding, one of the reason for slower simulink is because your model might include a MATLAB file S-function. MATLAB file S-functions also call the MATLAB execution engine at each time step. Consider converting the S-function either to a subsystem or to a C-MEX file S-function.
You can also refer to some of the other reasons for slow down of simulink here.
Refer to the documentation on Design Your Model for Effective Acceleration which helps to know about the techniques that you can use to speeduo model simulations.

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