What is different between AvailableMemory and FreeMemory?

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anaconpa 2021-11-25

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https://ww2.mathworks.cn/matlabcentral/answers/1595829-what-is-different-between-availablememory-and-freememory

编辑： Joss Knight 2021-11-28

Matlab seems that there are two properties of gpuDece, "FreeMemory" and "AvailableMemory".

 gd = gpuDevice;
 gd.FreeMemory
 gd.AvailableMemory

"AvailableMemory" is explained in the docmentation, but "Freememory" is not.

I want to know if this is simply overlooked by me or deprecated by matlab

There may be differences between the two results.

I want to know the difference between the two.

Thank you!

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Answer 1

Joss Knight 2021-11-28

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https://ww2.mathworks.cn/matlabcentral/answers/1595829-what-is-different-between-availablememory-and-freememory#answer_842254

编辑：Joss Knight 2021-11-28

Both are valid and supported, but FreeMemory was replaced many years ago by AvailableMemory as the documented way to determine how much space there is left in device memory.

Because MATLAB pools memory for performance reasons, some memory is allocated by MATLAB (not 'free') but can be released if needed (and therefore 'available').

Only FreeMemory is accessible by other applications.