pytorch

a8f9aab8 - [DDP Comm Hook] Add bf16 gradient compression to ddp_comm_hooks.rst (#64346)

[DDP Comm Hook] Add bf16 gradient compression to ddp_comm_hooks.rst (#64346) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64346 as title ghstack-source-id: 137170288 Test Plan: N/A Reviewed By: rohan-varma Differential Revision: D30693513 fbshipit-source-id: 8c64b8404ff3b0322e1bbbd93f6ef051ea91307d