pytorch

e62aabac - [Gradient Compression] Add a documentation page for DDP communication hooks (#51715)

[Gradient Compression] Add a documentation page for DDP communication hooks (#51715) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/51715 Add a documentation page for DDP communication hooks. Screenshot: {F369781049} Test Plan: View locally Reviewed By: pritamdamania87 Differential Revision: D26249330 fbshipit-source-id: ab973390ddb785c5191f587a1b2b6de7d229e50e