GitLab

* [feat] layer memory tracking

* [feat] layer memory tracking (add tests in CI)

* [feat] layer memory tracking: doc typos

* [feat] layer memory tracking: mypy fixes

* [feat] layer memory tracking: fixes for FSDP all gather tracking on pytorch 1.9 and above

* [feat] layer memory tracking: lint

* [feat] layer memory tracking: mypy
Co-authored-by: QuentinDuval <QuentinDuval@users.noreply.github.com>

Pre-commit hook fails when run on all files for three reasons:
(see trace below)

1. Trailing whitespace on multiple files
2. mypy fails to load numpy and then subsequently fails to load
LazyModule from pipe.py
3. isort sees issues with known_third_party packages

```
> pre-commit run --all-files

Trim Trailing Whitespace.................................................Failed
- hook id: trailing-whitespace
- exit code: 1
- files were modified by this hook

Fixing docs/source/conf.py
Fixing fairscale/experimental/nn/auto_shard.py
Fixing docs/source/deep_dive/activation_checkpointing.rst
Fixing docs/source/tutorials/pipe.rst
Fixing docs/source/installation_instructions.rst
Fixing docs/source/deep_dive/pipeline_parallelism.rst
Fixing docs/source/tutorials/activation_checkpointing.rst
Fixing docs/source/tutorials/offload_model.rst
Fixing docs/source/deep_dive/oss_sdp_fsdp.rst
Fixing docs/source/what_is_fairscale.rst
Fixing CHANGELOG.md
Fixing fairscale/experimental/nn/offload.py
Fixing docs/source/index.rst
Fixing docs/source/deep_dive/adascale.rst
Fixing README.md
Fixing docs/source/tutorials/oss.rst
Fixing docs/source/deep_dive/offload.rst

Check python ast.........................................................Passed
Check for merge conflicts................................................Passed
Don't commit to branch...................................................Passed
Check for added large files..............................................Passed
Fix End of Files.........................................................Failed
- hook id: end-of-file-fixer
- exit code: 1
- files were modified by this hook

Fixing requirements.txt
Fixing docs/source/getting_started.rst
Fixing docs/source/installation_instructions.rst
Fixing codecov.yml
Fixing docs/source/deep_dive/adascale.rst
Fixing docs/source/tutorials/oss.rst
Fixing docs/source/deep_dive/offload.rst

black....................................................................Passed
flake8...................................................................Passed
seed isort known_third_party.............................................Failed
- hook id: seed-isort-config
- exit code: 1
- files were modified by this hook
isort....................................................................Passed
mypy.....................................................................Failed
- hook id: mypy
- exit code: 2

setup.cfg:45: error: Error importing plugin 'numpy.typing.mypy_plugin': No module named 'numpy'
Found 1 error in 1 file (checked 197 source files)
```

* add tutorials

* add new context, modify and delete existing docs

* remove duplicate labels

* modify layout and more nits

* address comments

* fix merge conflicts

* Document FSDP tips and tricks in a separate file

* [docs]: add checkpoint_wrapper and many small fixes

* update copyright year

Fixing the relative positions of the html docs.

* adding a shard-aware GradScaler wrap, credits to Sean Naren for the idea
* adding stubs & explanations in the documentation

- removed experimental warning as we have validated it on cifar and
imagenet, transformer is looking good so far too.
- fixed API doc formatting
- make it consistent with the other code in the repo
- tested by making the doc locally and inspect the results

fix broken link

fix max depth

fix maxdepth

* wip_example

* [wip]mnist_pipe_example

* [wip]mnist_pipe_example

* [wip]mnist_pipe_example

* [wip]mnist_pipe_example

* [wip]mnist_oss_example

* working prototype

* added tutorial script

* update tutorial

* Update mnist_test_oss.py

* Update mnist_test_oss.py

* Update mnist_test_oss.py

* Update mnist_test_pipe.py

* Update tutorial_oss.py

* Update tutorial_pipe.py

* Update tutorial_pipe.py

* Update mnist_test_oss.py

* Update tutorial_pipe.py

* Update mnist_test_pipe.py

* Update tutorial_pipe.py

* fix black

* fix flacke8

* general fixes

* add example oss+pipe

* fix isort

* Update mnist_test_pipe.py

* fix black
Co-authored-by: Vittorio Caggiano <caggiano@devfair0253.h2.fair>