Same platform diff docker (runtime/devel) cant read GPU

all test in the same platform(centos, GPU driver is, )
in dockerhub
docker image pytorch/pytorch:1.8.1-cuda11.1-cudnn8-devel is ok, it can read gpu(torch.cuda.is_available() is true) but its too big, so i try pytorch/pytorch:1.8.1-cuda11.1-cudnn8-rutime cant read gpu ,why? where i can see the docker file? or how can i solve use samll docker image can read gpu question

What do you mean by too big? If you’re interested in studying what the pytorch docker images look like you can take a look at