Control Compilation of parfor-Loops

By default, MATLAB^® Coder™ generates code that can run the parfor-loop on multiple threads. To treat the parfor-loops as for-loops that run on a single thread, disable parfor with one of these methods:

• By using the codegen function with -O disable:openmp option at the command line.

• By using a code generation configuration object with the property EnableOpenMP set to false. For example:

  cfg = coder.config('lib'); 
  cfg.EnableOpenMP = false; 
  codegen myFunction -config cfg

• By setting Enable OpenMP library if possible to No under All Settings tab in the project settings dialog box.

When to Disable parfor

Disable parfor if you want to:

• Compare the execution times of the serial and parallel versions of the generated code.

• Investigate failures. If the parallel version of the generated code fails, disable parfor and generate a serial version to facilitate debugging.

• Use C compilers that do not support OpenMP.