Add nvidia-smi memory and utilization as native Python API (#69104)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69104
Add nvidia-smi memory and utilization as native Python API
Test Plan:
testing the function returns the appropriate value.
Unit tests to come.
Reviewed By: malfet
Differential Revision: D32711562
fbshipit-source-id: 01e676203299f8fde4f3ed4065f68b497e62a789
