pytorch

95a69a7d - adds list_gpu_processes function (#44616)

adds list_gpu_processes function (#44616) Summary: per title, to make it easier to track the creation of stray contexts: ``` python -c "import torch; a=torch.randn(1, device='cuda'); print(torch.cuda.memory.list_gpu_processes(0)); print(torch.cuda.memory.list_gpu_processes(1))" GPU:0 process 79749 uses 601.000 MB GPU memory GPU:1 no processes are running ``` Pull Request resolved: https://github.com/pytorch/pytorch/pull/44616 Reviewed By: mruberry Differential Revision: D23675739 Pulled By: ngimel fbshipit-source-id: ffa14cad9d7144e883de13b1c2c6817bd432f53a