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[checkpointio] gather tensor before unpad it if the tensor is both padded and distributed #6168

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Jan 21, 2025
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[checkpointio] gather tensor before unpad it if the tensor is both padded and distributed #6168

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4 changes: 2 additions & 2 deletions colossalai/checkpoint_io/hybrid_parallel_checkpoint_io.py
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Original file line number Diff line number Diff line change
Expand Up @@ -107,9 +107,9 @@ def _model_sharder(
if param is None:
continue
# Gather tensor pieces when using tensor parallel.
if is_padded_tensor(param):
param = to_unpadded_tensor(param)
param_ = gather_distributed_param(param, keep_vars=False)
if is_padded_tensor(param_):
param_ = to_unpadded_tensor(param_)
if pinned_state_dicts is not None:
if (prefix + name) not in pinned_state_dicts:
pinned_state_dicts[prefix + name] = torch.empty_like(param_, pin_memory=True, device="cpu")
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