MATLAB: How to generate MATLAB Coder code that does not use tbb libraries

codegendependencymatlab coderparalleltbbthreading

I'm using MATLAB coder for generating C++ code. I see that MATLAB uses several libraries (dlls and libs) like:

libmwmorphop_binary_tbb.lib

libmwbwlookup_tbb.lib

Which is any library in the following format: libmw*_tbb.lib or libmw*_tbb.dll.

Due to an overall system performance, I'd like to generate code that does not_* *_depend on the "tbb" libraries.

Best Answer

tbb libraries, or "thread build blocks", are used for parallel programming. In this case to disable dependency for these libraries, you can launch MATLAB with the startup flag -singleCompThread

(<https://www.mathworks.com/help/matlab/ref/matlabwindows.html#buklxlz-3>)

After doing so, verify that you're in single thread mode at the MATLAB command line:

>> maxNumCompThreads
ans =
       1

Once you've done this, you can proceed with your normal MATLAB Coder workflow (e.g. the MATLAB Coder App or using the "codegen" function at the command line). Then, use the "packNGo" function to zip up the generated code and dependencies. In single thread mode, you will no longer see dependencies on "tbb" libraries. See below for an example where single thread mode has no "tbb" dependency:

Related Solutions

MATLAB: Is code generation behavior different in 2018b for the “max” function

In 2018b, the default standard math library changed to "C99 (ISO)", hence the code generator makes the call to the "fmaxf" function which resides in the same library.

To return to the earlier code generation behavior, please change the standard math library to "C89/90 (ANSI)" in the following manner:

>> cfg = coder.config('dll');
>> cfg.TargetLangStandard = 'C89/C90 (ANSI)';
>> codegen myScript -config cfg -args {1 2 3} % replace the script name and args list accordingly

If you are using the MATLAB Coder App, this option will be found in the Generate Code step under More Settings > Custom Code > Code Replacement Libraries > Standard math library.

MATLAB: Importing legacy models from created with MIT Toolbox

Yes, the models created and which were working with MIT Toolbox can be used with the Simulink Support package for PARROT Minidrones, provided they follow the steps below:

1. Update the existing model to be used with Buses and 4 ports. It is mandatory to have the these 4 ports and signals through them as specified below:

Specifications of root level ports and signals through them

* Sl. No Port Type Data Type Storage class for signal through it Size Alias

*1. Inport (AC cmd) Bus: CommandBus ExportedGlobal NA Cmd_inport

* *2. Inport (Sensors) Bus: SensorsBus ExportedGlobal NA sensor_inport

* *3. Outport (Actuators) double ExportedGlobal 4 motors_outport

* *4. Outport (Flag) Uint8 ExportedGlobal 1 flag_outport

2. You can copy paste the controller logic from the old model and update the signals in such a way that the above criteria are met.

3. If simulation works and is successful, proceed to build the model.

Best Answer

Related Solutions

MATLAB: Is code generation behavior different in 2018b for the “max” function

MATLAB: Importing legacy models from created with MIT Toolbox

Related Question