Tony Marino asked . 2023-12-07

How to train a sequence to classification network on GPU

I have a sequence to classification network that I can successfully train on a CPU using the trainNetwork function. However, when I set the ExecutionEnvironment to GPU it takes the same amount of time as on the CPU, even though it says that it's running on the GPU. I'm assuming that's because the input/output data arrays are not on the GPU. When I try to move the arrays to the GPU (using gpuArray) the input array moves but I get an error on the output array because it's a categorical array and gpuArray only supports numeric and logical arrays.

Is there any way to move a categorical array to the GPU so that I can get trainNetwork to actually run at full speed on the GPU? Or is there another way to get a sequence to classification network to train on a GPU?

gpu , deep learning , AI, Data Science, and Statistics , Deep Learning Toolbox

Expert Answer

Prashant Kumar answered . 2024-12-22 01:00:12

HI Tony,

I understand you are facing issue when you train your network on GPU. I can suggest you 2 solutions regarding your query:

1.You can move a categorical array to the GPU, but you need to convert it to a numeric array first.

Convert the categorical array to a numeric array using the "grp2idx" function.

Once you have the numeric array, you can use "gpuArray" to move it to the GPU.

Example code:

 numericArray = grp2idx(categoricalArray);



 numericArrayGPU = gpuArray(numericArray);

You can refer to this MATLAB documentation and the MATLAB answer mentioned below:

<https://www.mathworks.com/help/stats/grp2idx.html>

2. You can try by specifying the execution environment as 'auto' in the training options. The Deep Learning toolbox will automatically handle the data movement and computations on the GPU for you. This includes moving the input data to the GPU and converting categorical data as needed. You can train your sequence-to-classification network with categorical arrays on a GPU without explicitly moving the input data to the GPU or converting the categorical data.

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