(6/n) Support 2D Parallelism - Trainer example #19879
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⚡ Required checks status: All passing 🟢Groups summary🟢 lightning_fabric: Azure GPU
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| inputs = batch[:, :-1] | ||
| labels = batch[:, 1:] | ||
| output = self.model(inputs) | ||
| with loss_parallel(): |
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TIL. Are you also enabling this for backward? https://github.com/pytorch/pytorch/blob/5fb11cda4fe60c1a7b30e6c844f84ce8933ef953/torch/distributed/tensor/parallel/loss.py#L35
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What does this PR do?
Adds an example for 2D parallelism (Tensor Parallelism + FSDP2) for the Trainer. It is equivalent to the one for Fabric added in #19846, so the model code etc. is copy-pasted. The main file to review is
examples/pytorch/tensor_parallel/train.py.This PR depends on #19878
📚 Documentation preview 📚: https://pytorch-lightning--19879.org.readthedocs.build/en/19879/
cc @Borda @carmocca @justusschock @awaelchli