Inference demo for Detectron 2 not using any resources

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I’m using Detectron2 with pretrained COCO-PanopticonSegmentation model on a GTX960. But as you can see, it’s barely using any resources. (That spike you see is me opening the screenshot utility)

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Thus, the inference is taking ages, even on Colab.

What could be going wrong?
What should I read to fix it?

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The Windows Task Manager doesn’t show the compute workload by default, if I’m not mistaken, so you should either select another view from the drop down menu or use nvidia-smi to check the GPU utilization.

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