Nycholas Maia asked . 2022-03-29

GPU and CPU code: How to do?

I would like to share my MATLAB project with others that does not have any GPU card in your computers, but I want to use the GPU power in my computer.

How can I write ONLY ONE MATLAB code that can be run with and without GPU system?

My main GPU commands are:

parfor
GPUarray

In C/C++ language, we can write a pre-processor that can be this "magic shift". Is possible to do this in MATLAB?

gpu , cpu , parfor , AI, Data Science, and Statistics , Deep Learning Toolbox

Expert Answer

John Michell answered . 2024-12-21 02:00:03

Depending on how your codes are structured, try to decide early on whether to use gpuArray or regular array. Most Matlab built-in functions will automatically determine and use gpuArrays.

function Output = main(Input)
%Decide early to use gpuArray
if gpuDeviceCount > 0 
    Input = gpuArray(Input);
end

%Use functions that support either gpuArray or regular arrays as inputs
plot(Input) 
Input = myCustonFcn(Input) %custom function that allows gpuArray inputs

%Return as a regular array when done
if existsOnGPU(Input)
    Output = gather(Input);
else
    Output = Input;
end

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