MATLAB: How to enable or control multi-threading in the application generated by the MATLAB Compiler 4.6 (R2007a)

MATLAB

I would like to enable multi-threading in my application generated by the MATLAB Compiler 4.6 (R2007a).

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Multithreaded computations, introduced in MATLAB R2007a, are turned on by default as of MATLAB R2008a release.

If Multi-threading is enabled at the time you build your distributable application or component with MATLAB Compiler, MATLAB Builder JA, MATLAB Builder EX or MATLAB Builder NE, the setting, along with all of your MATLAB preferences settings, will be enabled in your compiled application.

For information on functions that benefit from multi-core/multiprocessor systems, refer the following release notes:

http://www.mathworks.com/help/matlab/release-notes.html

Choose a MATLAB Release -> Mathematics -> New Multithreading Capability in MATLAB Functions for more detailed information in the release notes.

For more information about threading level control in MATLAB, please see the following link:

http://www.mathworks.com/support/solutions/data/1-BYXN3A.html?1-BYXN3A

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MATLAB: How to automatically limit the number of threads used by components built with MATLAB Compiler and MATLAB Builder products

Similar to the preferences which are propagated into your component, the files 'matlabrc.m' and 'startup.m' files are also included in the compilation. As in base/undeployed MATLAB, these functions are automatically run when you initialize your component.

To automatically set the number of threads used by your component, create a file named 'startup.m' in your project directory and add the following lines of code to it:

warning off MATLAB:maxNumCompThreads:Deprecated
maxNumCompThreads(1);

The first line of code suppresses the warning which is issued by calling maxNumCompThreads, and the second line actually sets the number of threads to 1.

NOTE: The maxNumCompThreads function will be removed in a future version of MATLAB. See the official function Help for more information:

https://www.mathworks.com/help/matlab/ref/maxnumcompthreads.html

MATLAB: How to use the MATLAB Compiler to create a compiled component and run it with an older version of the MATLAB Compiler Runtime (MCR)

The runtime libraries that initialize during runtime of MATLAB Compiled components are versioned so that there can be side by side installations of different versions of the MCR on one machine. Therefore, components compiled with one version of the MATLAB Compiler are only compatible with the MCR derived from the same version of MATLAB.

This also applies to all products that are dependent of the MATLAB Compiler, such as MATLAB Builder NE, MATLAB Builder JA, MATLAB Builder EX, etc.

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Related Solutions

MATLAB: How to automatically limit the number of threads used by components built with MATLAB Compiler and MATLAB Builder products

MATLAB: How to use the MATLAB Compiler to create a compiled component and run it with an older version of the MATLAB Compiler Runtime (MCR)

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