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[shardformer] remove useless code. #5645

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Merged
merged 1 commit into from
Apr 25, 2024
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[shardformer] remove useless code. #5645

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14 changes: 0 additions & 14 deletions colossalai/shardformer/modeling/opt.py
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Original file line number Diff line number Diff line change
Expand Up @@ -58,20 +58,6 @@ class OPTPipelineForwards:
under pipeline setting.
"""

@staticmethod
def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int] = None):
"""
Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
"""
bsz, src_len = mask.size()
tgt_len = tgt_len if tgt_len is not None else src_len

expanded_mask = mask[:, None, None, :].expand(bsz, 1, tgt_len, src_len).to(dtype)

inverted_mask = 1.0 - expanded_mask

return inverted_mask.masked_fill(inverted_mask.to(torch.bool), torch.finfo(dtype).min)

@staticmethod
def opt_model_forward(
self: OPTModel,
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