Examples of GPU do not work

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Peter Harrington
Peter Harrington 2023-4-22
回答： Joss Knight 2023-4-22
https://blogs.mathworks.com/loren/2012/02/06/using-gpus-in-matlab/?doing_wp_cron=1682115212.7595329284667968750000#12
I have the Parallel Processing toolbox.
tic;
A5 = parallel.gpu.GPUArray.rand(3000,3000);
B5 = fft(A5);
B5 = gather(B5);
time5 = toc;
>> A5 = parallel.gpu.GPUArray.rand(3000,3000);
Unable to resolve the name 'parallel.gpu.GPUArray.rand'.
One other demo used eigs, but I see now it is eig that works with the GPUArray object.
Any clues why this MathWorks Demo does not work?
In addition when I try to list MATLAB funtions that support GPU computations Google chrome crashes?
https://www.mathworks.com/help/referencelist.html?type=function&capability=gpuarrays
Thanks in advance,
Pete

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回答（2 个）

Joss Knight
Joss Knight 2023-4-22
This isn't a demo it's a blog from 11 years ago, and unfortunately it's using syntax that was removed from MATLAB 9 years ago. It was substituted for the simpler gpuArray.rand and then superseded by rand(..., 'gpuArray').
Walter Roberson
Walter Roberson 2023-4-22
See https://www.mathworks.com/help/parallel-computing/parallel.gpu.randstream.parallel.gpu.randstream.create.html and https://www.mathworks.com/help/parallel-computing/generating-random-numbers-on-a-gpu.html
You would use the first of those if you specifically wanted to use random number streams; most of the time invoking rand() with "gpuArray" option is good-enough for most people.

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