parfor images and gpu

Question

michael scheinfeild 2017-1-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/318723-parfor-images-and-gpu

回答： Joss Knight 2017-1-2

i use the new options in loops

parfor
some code,,,
someimage=gpuarray(image)
process(someimage)
end

1) it slows down pc 2) it takes all memory 3) somtimes it works slower than normal loop and image in cpu

so when it is usful to use parfor (images i suppose transmited all fors if it is array) and gpu not alwayes fast is it the communication gpu cpu that takes the time?

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Answer 1

Joss Knight 2017-1-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/318723-parfor-images-and-gpu#answer_249131

You've only got one GPU so it's rarely faster to run anything on it in a parallel pool. Doing so is just an elaborate way of running the computation serially but with greater overhead and less memory.

Get a second GPU, and you'll see an improvement.