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[Model] Use sigmoid for single-label classification (#18313)

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Signed-off-by: 22quinn <33176974+22quinn@users.noreply.github.com>
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22quinn 2025-05-18 07:00:09 -07:00 committed by GitHub
parent 1a8f68bb90
commit 908733aca7
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1 changed files with 9 additions and 2 deletions
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vllm/model_executor/layers/pooler.py
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@ -242,9 +242,16 @@ class PoolerHead(nn.Module):
if self.softmax:
if isinstance(pooled_data, list):
pooled_data = [F.softmax(data, dim=-1) for data in pooled_data]
pooled_data = [
F.softmax(data, dim=-1)
if data.shape[-1] >= 2 else F.sigmoid(data)
for data in pooled_data
]
else:
pooled_data = F.softmax(pooled_data, dim=-1)
if pooled_data.shape[-1] >= 2:
pooled_data = F.softmax(pooled_data, dim=-1)
else:
pooled_data = F.sigmoid(pooled_data)
return pooled_data