diff --git a/代码/code/infer.py b/代码/code/infer.py index d2109c5..dc51204 100644 --- a/代码/code/infer.py +++ b/代码/code/infer.py @@ -257,16 +257,33 @@ class RepEncoder(nn.Module): self.linear = nn.Linear(in_features=slot_num * emb_dim, out_features=d_model) def forward(self, batch): - pooled_embs = [] max_idx = self.emb.num_embeddings - 1 target_dtype = self.input_norm.weight.dtype # 后续层 dtype(FP16 时为 torch.float16) + + # 批量收集所有 slot 的 values,一次 embedding 查表(减少 28 → 1 次 kernel launch) + all_values = [] + all_offsets = [] + slot_boundaries = [0] # 记录每个 slot 在 all_values 中的起止位置 for i in range(self.slot_num): values, offsets = batch[i + 1] offsets = offsets.to(values.device) - values = values.clamp(0, max_idx) # 超出 vocab_size 的 sign id 截断,避免越界 - sign_emb = self.emb(values).to(target_dtype) - res = torch.segment_reduce(sign_emb, reduce='sum', offsets=offsets, initial=0) + values = values.clamp(0, max_idx) + all_values.append(values) + all_offsets.append(offsets) + slot_boundaries.append(slot_boundaries[-1] + values.size(0)) + + # 一次批量 embedding 查表 + values_cat = torch.cat(all_values) + embs_cat = self.emb(values_cat).to(target_dtype) + + # 按 slot 拆分并 segment_reduce + pooled_embs = [] + for i in range(self.slot_num): + start, end = slot_boundaries[i], slot_boundaries[i + 1] + slot_embs = embs_cat[start:end] + res = torch.segment_reduce(slot_embs, reduce='sum', offsets=all_offsets[i], initial=0) pooled_embs.append(res) + fused_embs = torch.cat(pooled_embs, dim=1) norm_emb = self.input_norm(fused_embs) rep_emb = self.linear(norm_emb)