Forward CUDA printf output to the MATLAB console

Question

Oliver Woodford 2014-6-4

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https://ww2.mathworks.cn/matlabcentral/answers/132358-forward-cuda-printf-output-to-the-matlab-console

评论： Thomas Pohl 2017-10-2

I am wrapping CUDA code in a mex file. I have printfs in my CUDA kernel, and I want to see the output from those printfs, ideally in the MATLAB console, but at least somewhere.

Just calling printf, whether within a CUDA kernel or in a normal C/C++ file (avoiding mexPrintf) doesn't get output to the MATLAB console or to the program output window of an attached debugger such as Visual Studio. Perhaps it's just a question of piping stdout somewhere.

Please note that using mexPrintf is not an option here - it won't work in the CUDA kernel. Please also note that I don't have any add-on toolboxes.

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Answer 1

Oliver Woodford 2014-6-5

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https://ww2.mathworks.cn/matlabcentral/answers/132358-forward-cuda-printf-output-to-the-matlab-console#answer_139544

There might be a way to redirect output from stdout in a mex file ( see this question ), but I haven't been able to get it to work on Windows yet.

What I was able to use was the old cuPrintf code which came before the CUDA printf, and is still available in the CUDA SDK sample "simplePrintf", and redirect the output to a file.