techsmith_1 asked . 2021-05-20

Using deep learning parfor to predict in parfor get GPU out of memory issues

I have deep learning model trained and now want to use it for predict on a batch of my images.

I have a 12GB GPU and 16 physical cores cpu and want to use parfor for predict function. The psedo code looks like below

parfor i = 1:100

image = read('xxx');

mask = predict(net, image);

end

However, I got gpu out of memory issues when use parfor. Just use for works fine. Also, forecefully turn off all gpu by disable them in device manager works as well to run on 12 core CPU with parfor, which is even faster to use for with GPU (I think because copying single image between devices is even more expensive).

Anyone has idea how to use both parfor and gpu to for deep learning inference? I also try to limit the number of the worker in parfor to 2 and even 1. Even 1 worker gives the same gpu out of memeory problem. I thus assume the parfor doesn't realse the memory or resource timely after each prediction. I even added the gpuDevice command after predict trying to forcefully clear out memory, but the error stays.

deep learning , matlab , simulink

Expert Answer

Kshitij Singh answered . 2024-04-26 13:04:15

1. Set the 'ExecutionEnvironment'to 'cpu' in your predict function. Documentation on this can be found here.

2. Using parfor with a single GPU will not work. Using parfor with 16 workers will try to access the 1 GPU in parallel 16 times.

3. It is strange that you are receiving an out of memory error but this maybe due to the fact you are using predict with parfor.

I would recommend performing a small test on 10% of your images to find which method runs quicker:

1. Predict all images using the single GPU. Put a tic/toc around it to test the timing.

2. Predict all images using parfor with the ExecutionEnvironment set to cpu. Use tic/toc again to test the timing.

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techsmith_1 asked . 2021-05-20

Using deep learning parfor to predict in parfor get GPU out of memory issues

deep learning , matlab , simulink

Expert Answer

Kshitij Singh answered . 2024-04-26 13:04:15

Not satisfied with the answer ?? ASK NOW

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techsmith_1 asked . 2021-05-20

Using deep learning parfor to predict in parfor get GPU out of memory issues

deep learning , matlab , simulink

Expert Answer

Kshitij Singh answered . 2024-04-26 13:04:15

Not satisfied with the answer ?? ASK NOW

MOST VIEWED QUESTIONS

Recent Matlab Projects

Classification of Covid and Non-Covid Lungs CT-Scan using Deep Learning with MATLAB

Matlab simulation on Wind Energy system

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