How to debug C-Code that runs on a Worker with the Parallel Computing Toolbox?

I am running different Simulink models in parallel using the parallel computing toolbox. The models are using custom C-code that seems to provide false results when running on differentr workers. How can I debug the s-functions that runs on a worker?

Answer 1

[MathWorks Support Team]

You can debug the C code that runs in a MATLAB process launched the parallel computing toolbox with a C-compiler such as “Microsoft Visual C++”.

 

For this, follow the below steps:

1. Compile your c code with Visual C++ with a debug flag.

2. Start a of MATLAB sessions for parallel computation

3. Find out the process id of the MATLAB process you need to debug. This can be done with following code:

 

 spmd    % By default creates pool and uses all workers
 feature getpid
 end

 

4. Open the c file with Visual Studio and place break point in it.

5. Attach Visual Studio to the corresponding MATLAB process

6. Run and debug your c-code in the corresponding MATLAB worker