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feat: 同步 RAG 融合与训练核心代码(fusion 支持 f_retr、models/trainer/moe/dataset)

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DicongLi 2026-07-05 01:07:26 +08:00
parent 3898fb8973
commit 987ecf6386
2 changed files with 383 additions and 379 deletions
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lnp_ml/modeling/layers/fusion.py
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@ -128,6 +128,7 @@ class ResidualConcatFusion(nn.Module):
# 零初始化门控（可学习标量），旁路初始不参与
self.g_moe = nn.Parameter(torch.zeros(()))
self.g_llm = nn.Parameter(torch.zeros(()))
self.g_retr = nn.Parameter(torch.zeros(())) # 检索旁路零初始化门控
def forward(
self,
@ -135,6 +136,7 @@ class ResidualConcatFusion(nn.Module):
tab: torch.Tensor,
f_moe: Optional[torch.Tensor] = None,
f_llm: Optional[torch.Tensor] = None,
f_retr: Optional[torch.Tensor] = None,
return_attn_weights: bool = False,
) -> Union[torch.Tensor, Tuple[torch.Tensor, torch.Tensor]]:
# 只对真实 token（chem + tab）做注意力池化，旁路不参与 softmax 竞争
@ -148,5 +150,7 @@ class ResidualConcatFusion(nn.Module):
out = out + self.g_moe * f_moe # 残差 + 零初始化门
if f_llm is not None:
out = out + self.g_llm * f_llm
if f_retr is not None:
out = out + self.g_retr * f_retr # 检索旁路，零初始化门保证起点=不开
return (out, attn) if return_attn_weights else out