MATLAB: Simulink Real Time Workshop – how to measure code execution time

real time workshopsimulink

I have a Simulink model from which I generate code using Real Time Workshop for a Quanser Q8 data acquisition board. How do I measure the actual execution time of my model?

Best Answer

If you are using Quanser's QUARC software to access the Q8, there is also a Computation Time block that is available. This block measures and outputs the computation time of the attached Function Call Subsystem (or model), using a high-resolution independent time source. In Windows, this time has nanosecond resolution.

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MATLAB: Real-time windows target Toolbox

Hi Zi,

Yes, Real-Time Windows Target is now called Simulink Desktop Real-Time. It looks like the change happed in R2015a.

MATLAB: How to pause the executable of a model built using Real-Time Workshop 7.3 (R2009a)

To pause the model executable one has to alter the main function in grt_main.c.

In the main function, there is a 'while' loop which calls rt_OneStep at every step of the model execution. To pause the executable at a particular time, query the current sample time and insert a conditional sleep/pause before the call to rt_OneStep.

For example, insert the following code fragment in grt_main.c before the call to rt_OneStep in the main function:

curr_time = rtmGetT(S);
if (curr_time == 5)
   sleep(1000);
end
rt_OneStep(S)

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