GitLab

* enable reduce scatter overlap with other operations

* fixed unit tests and added docstrings for the new parameters for fsdp

* fixed more unit tests

* fixed unit tests

* avoided the pickle error on process_group_reduce_scatter

* removed an unnecessary parameter in unit tests

* remove unnecessary prints

* fixed the docstring

* skipped the test_offload unit test because this unit test failed in the main branch

* removed the enable_reduce_scatter_overlap API parameter

* added doc string for the defualt value of process_group_reduce_scatter parameter

* fixed a syntax bug

* fixed a bug which cause unitest failure

* removed the all_gather in the ProcessGroupName enum

* added more comment

* changed the default value of process_group_reduce_scatter from None to ProcessGroupName.reduce_scatter

* Add test (broken) for gradient accumulation without no_sync context manager

* changelog

* no_sync to grad_acc renaming for tests

* clean up tmp files

* support grad acc without no_sync

* minor

* update changelog

* Update fairscale/nn/data_parallel/fully_sharded_data_parallel.py

Better assertion from Sam.
Co-authored-by: Sam Shleifer <sshleifer@gmail.com>

* lint
Co-authored-by: Min Xu <min.xu.public@gmail.com>
Co-authored-by: Min Xu <24926999+min-xu-ai@users.noreply.github.com>
Co-authored-by: Sam Shleifer <sshleifer@gmail.com>

* Update fully_sharded_data_parallel.py

update fully_sharded_data_parallel to use _allgather_base

* Update reduce_scatter_bucketer.py

Use reduce_scatter_base

* Update fully_sharded_data_parallel.py

nonblocking gradient cpu copy, and nonblocking param rebulds

* Update reduce_scatter_bucketer.py

lints

* Update fully_sharded_data_parallel.py

* Update reduce_scatter_bucketer.py

* Update reduce_scatter_bucketer.py

* lints

* linter, test fix

* linter

* LINTERgit add fairscale/utils/reduce_scatter_bucketer.pygit add fairscale/utils/reduce_scatter_bucketer.py

* LINTERgit add tests/nn/data_parallel/test_fsdp_overlap.pygit add tests/nn/data_parallel/test_fsdp_overlap.py

* Update test_fsdp_overlap.py

* Update fairscale/utils/reduce_scatter_bucketer.py
Co-authored-by: Min Xu <24926999+min-xu-ai@users.noreply.github.com>

* Update fairscale/nn/data_parallel/fully_sharded_data_parallel.py
Co-authored-by: Min Xu <24926999+min-xu-ai@users.noreply.github.com>

* Update reduce_scatter_bucketer.py

* isort
Co-authored-by: Ubuntu <ubuntu@ip-172-31-9-185.ec2.internal>
Co-authored-by: Min Xu <24926999+min-xu-ai@users.noreply.github.com>
Co-authored-by: Ubuntu <ubuntu@ip-172-31-77-164.ec2.internal>