[WIP] Use torch 2.2 distributed checkpoint APIs for FSDP #19497
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Feb 19, 2024
| if _TORCH_GREATER_EQUAL_2_2: | ||
| from torch.distributed.checkpoint.state_dict import StateDictOptions, set_model_state_dict | ||
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| # `cpu_offload` disabled because when used with `full_state_dict` only rank 0 loads the state dict |
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Notice that the other path sets rank0_only=False. I asked if this could be configurable in pytorch/pytorch#112837 (comment)
| @@ -440,6 +439,7 @@ def save_checkpoint( | |||
| ) | |||
| if filter is not None and self._state_dict_type == "sharded": | |||
| # https://github.com/pytorch/pytorch/issues/105379 | |||
| # FIXME: revisit support with new APIs | |||
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What does this PR do?
Fixes #19462
Resources
TODO:
_TORCH_GREATER_EQUAL_2_2 = Falsesince CI only tests 2.2📚 Documentation preview 📚: https://pytorch-lightning--19497.org.readthedocs.build/en/19497/