pytorch

4b3cf1ea - [BE]Clarify how to check memory saving if using gradient_as_bucket_view (#71483)

[BE]Clarify how to check memory saving if using gradient_as_bucket_view (#71483) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/71483 claify that peak memory saving should be checked after first iteration when using gradient_as_bucket_view ghstack-source-id: 147271113 Test Plan: unit test Reviewed By: rohan-varma Differential Revision: D33662424 fbshipit-source-id: f760da38e166ae85234e526ddf1526269ea25d42 (cherry picked from commit a40dda20daa2fe051fcaa8fee5f3641aeea1da1c)