use xpcbench to bench a user model using simulink real-time 2015b

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Howard Loewen
Howard Loewen 2024-10-31
回答： Dimitri MANKOV 2024-11-5
Hi,
I am trying to bench test my simulink real-time model on a target PC using xpcbench command.
When I ran xpcbench('my_model'), it tried to run the model with small time steps a couple of times and failed to come up with the smallest time possible to run the model. (all attempts resulted in CPU overload error)
I can run the model using 10ms time step. But simulink stopped the evaluation at 1ms.
I am wondering if there is any way to specify how many times xpcbench should try OR a starting sample time so that it could evaluate with more appropriate time step values ?
Thank you

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Dimitri MANKOV
Dimitri MANKOV 2024-11-5
Hi Howard,
That's a tough question to answer, especially for such an old MATLAB release... But perhaps you could use an alternative approach. I'm not sure whether it was already available in Simulink Real-Time in R2015b, but you could try running the execution profiler to estimate how much effective time is required for every task in your model/real-time application. This should provide you with a good guess of the lower step size limit that you could achieve with your model in its current configuration on your specific hardware.
I hope this is helpful!
Dimitri

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