track ddp API usage

[zhaojuanmao]

Stack from ghstack:

• track ddp API usage #35837 track ddp API usage

track ddp API usage

Differential Revision: D20801983

[dr-ci]

💊 CircleCI build failures summary and remediations

As of commit 678aa00 (more details on the Dr. CI page):

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• 1/3 failures introduced in this PR

• 2/3 broken upstream at merge base 6318899 on Apr 01 from 6:30am to 10:23am PDT (8 commits; 8c534bb - 6491bf2)

  Please rebase on the viable/strict branch (expand for instructions)

  Since your merge base is older than viable/strict, run these commands:

  git fetch https://github.com/pytorch/pytorch viable/strict
  git rebase FETCH_HEAD
  

  Check out the recency history of this "viable master" tracking branch.

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XLA failure

Job pytorch_xla_linux_xenial_py3_6_clang7_build is failing. Please create an issue with title prefixed by [PT_BREAK] in pytorch/xla and link to to this PR. If you have questions, please reach out to @ailzhang / @dlibenzi / @JackCaoG.

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🚧 2 upstream failures:

These were probably caused by upstream breakages:

• pytorch_linux_xenial_cuda10_2_cudnn7_py3_gcc7_test on Apr 01 from 6:30am to 10:28am PDT (9 commits; 8c534bb - acb59a3)
• pytorch_linux_xenial_py3_clang5_asan_test on Apr 01 from 6:30am to 10:23am PDT (8 commits; 8c534bb - 6491bf2)

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This comment has been revised 4 times.

[rohan-varma]

LGTM. Are there any other API points that we'd like to log?

[facebook-github-bot]

This pull request has been merged in 173e444.