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Previously I was checking the memory usage on my GPU with the following command:

nvidia-settings -q all | grep Memory

I am processing some scientific data on my GPU with numpy and theano. I was doing this with the gnome desktop running, and there was already 380 Mb of memory used on the device. So I stopped lightdm to free up a little more GPU memory; but, now the nvidia-settings tool no longer works.

It simply errors that there is no display

ERROR: Cannot open display ':0.0'.

Is there some other way of getting GPU memory without using this tool? Is there some way to use make it function in headless mode?

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Mitch (credit to) gives the answer here: askubuntu.com/questions/387594/how-to-measure-gpu-usage nvidia-smi –  ClothSword Dec 7 '13 at 19:51
possible duplicate of askubuntu.com/questions/387594/how-to-measure-gpu-usage? –  Kevin Bowen May 19 at 7:17

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