Refine research_attention and forward model.

qwen/modeling_qwen.py

@@ -209,30 +209,9 @@ class QwenRunner:
             outputs = self.forwardQWen(input_ids)
             next_token_scores = outputs[:, -1, :]
 
-            # repetition_penalty
+            next_token_scores = self.repetition_penalty(input_ids, next_token_scores)
-            penalty = qwen.config.repetition_penalty
+            next_token_scores = self.top_p(next_token_scores)
-            score = torch.gather(next_token_scores, 1, input_ids)
+            next_tokens = self.sample(next_token_scores)
-            # if score < 0 then repetition penalty has to be multiplied to reduce the token probabilities
-            score = torch.where(score < 0, score * penalty, score / penalty)
-            next_token_scores = next_token_scores.scatter_(1, input_ids, score)
-
-            # top_p
-            top_p = qwen.config.top_p
-            filter_value = -float("Inf")
-            min_tokens_to_keep = 1
-            sorted_logits, sorted_indices = torch.sort(next_token_scores, descending=False)
-            cumulative_probs = sorted_logits.softmax(dim=-1).cumsum(dim=-1)
-            # Remove tokens with cumulative top_p above the threshold (token with 0 are kept)
-            sorted_indices_to_remove = cumulative_probs <= (1 - top_p)
-            # Keep at least min_tokens_to_keep
-            sorted_indices_to_remove[..., -min_tokens_to_keep:] = 0
-            # scatter sorted tensors to original indexing
-            indices_to_remove = sorted_indices_to_remove.scatter(1, sorted_indices, sorted_indices_to_remove)
-            next_token_scores = next_token_scores.masked_fill(indices_to_remove, filter_value)
-
-            # sample
-            probs = nn.functional.softmax(next_token_scores, dim=-1)
-            next_tokens = torch.multinomial(probs, num_samples=1).squeeze(1)
 
             next_tokens = next_tokens * unfinished_sequences + pad_token_id * (1 - unfinished_sequences)
             input_ids = torch.cat([input_ids, next_tokens[:, None]], dim=-1)
@@ -379,3 +358,31 @@ class QwenRunner:
         # loss.backward()
 
         return lm_logits
+
+    def repetition_penalty(self, input_ids, next_token_scores):
+        penalty = self.qwen.config.repetition_penalty
+        score = torch.gather(next_token_scores, 1, input_ids)
+        # if score < 0 then repetition penalty has to be multiplied to reduce the token probabilities
+        score = torch.where(score < 0, score * penalty, score / penalty)
+        next_token_scores = next_token_scores.scatter_(1, input_ids, score)
+        return next_token_scores
+
+    def top_p(self, next_token_scores):
+        top_p = self.qwen.config.top_p
+        filter_value = -float("Inf")
+        min_tokens_to_keep = 1
+        sorted_logits, sorted_indices = torch.sort(next_token_scores, descending=False)
+        cumulative_probs = sorted_logits.softmax(dim=-1).cumsum(dim=-1)
+        # Remove tokens with cumulative top_p above the threshold (token with 0 are kept)
+        sorted_indices_to_remove = cumulative_probs <= (1 - top_p)
+        # Keep at least min_tokens_to_keep
+        sorted_indices_to_remove[..., -min_tokens_to_keep:] = 0
+        # scatter sorted tensors to original indexing
+        indices_to_remove = sorted_indices_to_remove.scatter(1, sorted_indices, sorted_indices_to_remove)
+        next_token_scores = next_token_scores.masked_fill(indices_to_remove, filter_value)
+        return next_token_scores
+
+    def sample(self, next_token_scores):
+        probs = nn.functional.softmax(next_token_scores, dim=-1)
+        next_tokens = torch.multinomial(probs, num_samples=1).squeeze(1)
+        return next_tokens

qwen/research_attention.py

@@ -70,28 +70,44 @@ def Dump_lm_head_weight(model):
 # Dump_lm_head_weight(model)
 
 
+def DumpQK(query, key, causal_mask, index):
+    scale_factor = 1 / math.sqrt(query.size(-1))
+    attn_weight = query @ key.transpose(-2, -1) * scale_factor
+    attn_weight = torch.softmax(attn_weight, dim=-1)
+    size = query.shape[2]
+    attn_mask = torch.ones(causal_mask.shape, dtype=query.dtype, device=query.device)
+    attn_mask.masked_fill_(causal_mask.logical_not(), float(0))
+    qk = attn_weight * attn_mask
+    qk = qk[0]
+    prePath = "./temp/" + "q@k_seq_" + str(size) + "_layer_" + str(index) + ".png"
+    show.DumpTensorToImage(qk, prePath, GridValue=255)
+
+
 class ResearchRunner(QwenRunner):
+    def __init__(self, model):
+        super().__init__(model)
+        self.tokenDecode = []
+
     def attention(self, attention, query, key, value, causal_mask):
         query = query.permute(0, 2, 1, 3)
         key = key.permute(0, 2, 1, 3)
         value = value.permute(0, 2, 1, 3)
 
-        scale_factor = 1 / math.sqrt(query.size(-1))
+        DumpQK(query, key, causal_mask, attention.index)
-        attn_weight = query @ key.transpose(-2, -1) * scale_factor
-        attn_weight = torch.softmax(attn_weight, dim=-1)
-        size = query.shape[2]
-        attn_mask = torch.ones(causal_mask.shape, dtype=query.dtype, device=query.device)
-        attn_mask.masked_fill_(causal_mask.logical_not(), float(0))
-        qk = attn_weight * attn_mask
-        qk = qk[0]
-        prePath = "./temp/" + "q@k_seq_" + str(size) + "_layer_" + str(attention.index) + ".png"
-        show.DumpTensorToImage(qk, prePath, GridValue=255)
 
         attn_output = F.scaled_dot_product_attention(query, key, value, attn_mask=causal_mask).transpose(1, 2)
         context_layer = attention._merge_heads(attn_output, attention.num_heads, attention.head_dim)
         attn_output = attention.c_proj(context_layer)
         return attn_output
 
+    def sample(self, next_token_scores):
+        next_tokens = super().sample(next_token_scores)
+        decoded, response, end_reason = decode_tokens(
+            next_tokens,
+            tokenizer,
+        )
+        self.tokenDecode.append(decoded)
+        return next_tokens
 
 runner = ResearchRunner(model)
 
@@ -106,5 +122,8 @@ print(decode_tokens)
 # 日本的首都东京。<|im_end|>
 # <|endoftext|>
 
+show.DumpListToFile(runner.tokenDecode, "./temp/token_decode_list.txt")
+
+
 if decode_tokens.split("\n")[-2] != """日本的首都东京。<|im_end|>""":
     raise ()