Processing on GPU in Simulink

I have a block in Simulink which does a frequency shift of a Signal. It consists of calculations involving exponential. I used the 'Math function' block. The whole Simulink model takes approximately 1042.34s. When this block is removed it takes 249.38s. So the execution time is increased so much because of this exponential block.

I am trying to find different ways to reduce the time taken because of this. I tried replacing this with a MATLAB function block using GPU Arrays like below,

function y = exponential(u)
%#codegen
y = zeros(size(u),'single');
coder.extrinsic('gpuArray');
u = gpuArray(u);
y = exp(u);

This throws a runtime error 'MATLAB expression 'exp' is not numeric.'

How to get rid of this error and use GPU in Simulink? If this is not the right way to use GPU then please give me a reference for using it right.

Answer 1

[Joss Knight]

gpuArray is not yet supported by GPU Coder. To see how you can use GPU Coder with Simulink, take a look at this example.

[Bhavanithya Thiraviaraja]

So if I understand it right, there is no way to use gpuArray in Simulink via a MATLAB function block but it can be made to run on the GPU using the GPU coder as given in the exaample

[Joss Knight]

That's the way I understand it, yes.

Answer 2

[Hassan Khan]

hello brother..

i have a GPU of GTX 1650 ... i want to run my simulink model on gpu but i dont know how to do this... please give me an example of simulink or give some other reference that can help me.

Thanks

[Joss Knight]

Hang on, let me Google "MATLAB Simulink GPU" for you and post the first hit:

https://www.mathworks.com/help/gpucoder/ug/simulation-acceleration-using-gpu-coder.html