pytorch

4f32bdd8 - [PyTorch Distributed] Move NCCL_DEBUG print to after NCCL init (#74287)

[PyTorch Distributed] Move NCCL_DEBUG print to after NCCL init (#74287) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/74287 NCCL may read env vars from nccl.conf, it would be more accurate to get envs after NCCL inits Test Plan: unit test Reviewed By: ajauhri Differential Revision: D34912492 fbshipit-source-id: d794935573a59fd25f8cbfde6b64978e063e4d7a (cherry picked from commit 2474cbd35d06938259952161800b6175b00ffc9a)