MATLAB: Error using parpool with threads in 2020a

MATLABMATLAB CompilerParallel Computing Toolboxparpoolr2020athreaded

I have compiled a code that uses parpool("threads"), in 2020a, my code works as expected when run inside of matlab. However, once the code is compiled, and executed with the latest 2020a runtime, it reports:

Unable to resolve the name parallel.ThreadPool.createPool.

Any ideas? This seems to be from a Java installation, right?

Best Answer

Hi Francesc. Support for threaded pools in deployed applications is a future enhancement. In the meantime, consider the following workaround

if isdeployed
     p = parpool('local');
else
     p = parpool('threads');
end

Related Solutions

MATLAB: Can I compile Distributed Computing Toolbox using MATLAB Compiler and deploy to machines that do not have a MATLAB installation

Starting from MATLAB 7.7 (R2008b), it is possible to compile functions in Parallel Computing Toolbox and Distributed Computing Toolbox.

This functionality is not available in previous releases.

MATLAB: What does “parpool close force local” mean

Something like,

if numProc <= 1
    p = gcp('nocreate');
    if ~isempty(p)
        delete(p);
    end
    poolSize = 0;
else
    p = gcp('nocreate');
    if isempty(p)
        poolSize = 0;
    else
        poolSize = p.NumWorkers;
        if poolSize ~= numProc
            delete(p);
            poolSize = 0;
        end
    end
    if poolSize == 0
        try
            p = parpool(numProc);
            poolSize = p.NumWorkers;
        catch
            poolSize = 0;
        end
    end
end

Best Answer

Related Solutions

MATLAB: Can I compile Distributed Computing Toolbox using MATLAB Compiler and deploy to machines that do not have a MATLAB installation

MATLAB: What does “parpool close force local” mean

Related Question