Loop on gpu

Question

Mate 2u 2012-3-24

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/33324-loop-on-gpu

编辑： Edric Ellis 2023-2-3

采纳的回答： Edric Ellis

Hi there, for multiple cores on CPU you can use parfor. But for a loop on gpu how can you speed it up?

Any help?

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Answer 1

Edric Ellis 2012-3-26

1
链接

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https://ww2.mathworks.cn/matlabcentral/answers/33324-loop-on-gpu#answer_42033

编辑：Edric Ellis 2023-2-3

The nearest equivalent on the GPU is to use arrayfun. This implicitly loops over each element of your input gpuArray, so there's no need for an explicit parfor loop.

Have a look at this demo which shows using a while loop inside a call to arrayfun on the GPU. In this case, the arrayfun call parallelises operations on each element of a large array, and the function running on the GPU includes a for loop.

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Maniprakash Reddy Gunturu 2017-11-8

在 MATLAB Online 中打开

Answer is so helpful for me but my problem is quite different from the above problem. can you please help me to solve the below problem.

 function [s,q]=initial(p,cn)
 if cn<5
 s=100./cn;
 q=s+p;
 cn(2,1)=s+2; 
 else
 s=500./cn;
 q=s+p;
 cn(2,1)=s+4;
 end

p=gpuArray([4;5;7;8;7;8;7;2]);

cn=gpuArray([15]);

[s,q]=arrayfun(@initial,p,cn)

my problem is similar to above code. i want to run the above code through "parallel computations using GPU".

my questions are

1. can use "ARRAYFUN" (my inputs (cn,p) have different size) to solve the above problem? i need to get "cn(i+1)" value from s(i).

2. if not how can i solve above problem through "parallel computations using GPU".

AVINABA BISWAS 2020-5-16

Yes. I have also the similar situation. Means I have created a function and I want to call this function by using inputs which are already in gpuarray.

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