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Add warning about not supporting torch.nn.SyncBatchNorm #5046

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Merged
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Feb 18, 2025
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Add warning about not supporting torch.nn.SyncBatchNorm #5046

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9579593
Add warning about not supporting
Feb 18, 2025
e17131e
update wording
Feb 18, 2025
7f0f4d4
Merge branch 'master' into syncbatchnorm
pintaoz-aws Feb 18, 2025
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2 changes: 2 additions & 0 deletions doc/frameworks/pytorch/using_pytorch.rst
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Expand Up @@ -375,6 +375,8 @@ To initialize distributed training in your script, call
`torch.distributed.init_process_group
<https://pytorch.org/docs/master/distributed.html#torch.distributed.init_process_group>`_
with the desired backend and the rank of the current host.
Warning: ``torch.nn.SyncBatchNorm`` is not supported and its existence in
``init_process_group`` will cause an exception during distributed training.
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Can we make the wording more generic instead of just this use case ?

smdistributed with init_process_group will not allow use of certain other torch features, such as (and likely not limited to) torch.nn.SyncBatchNorm.

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updated


.. code:: python

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