Add GPTQ support (#916)

vllm/model_executor/models/chatglm.py

@@ -377,6 +377,9 @@ class ChatGLMForCausalLM(nn.Module):
                 continue
             if "word_embeddings" in name:
                 name = name.replace(".word_embeddings", "")
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
             param = params_dict[name]
             weight_loader = getattr(param, "weight_loader",
                                     default_weight_loader)

vllm/model_executor/models/falcon.py

@@ -425,16 +425,21 @@ class FalconForCausalLM(nn.Module):
         params_dict = dict(self.named_parameters())
         for name, loaded_weight in hf_model_weights_iterator(
                 model_name_or_path, cache_dir, load_format, revision):
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
             param = params_dict[name]
             if "query_key_value" in name:
                 output_dim = getattr(param, "output_dim", None)
                 loaded_weight_shape = loaded_weight.shape
+                if output_dim is not None:
                     loaded_weight = loaded_weight.view(
                         loaded_weight_shape[:output_dim] +
-                    (total_num_kv_heads, num_query_heads_per_kv_head + 2, -1) +
-                    loaded_weight_shape[output_dim + 1:])
+                        (total_num_kv_heads, num_query_heads_per_kv_head + 2,
+                         -1) + loaded_weight_shape[output_dim + 1:])
                     wq = loaded_weight.narrow(
-                    output_dim + 1, 0, num_query_heads_per_kv_head).reshape(
+                        output_dim + 1, 0,
+                        num_query_heads_per_kv_head).reshape(
                             *loaded_weight_shape[:output_dim], -1,
                             *loaded_weight_shape[output_dim + 1:])
                     wk = loaded_weight.narrow(

vllm/model_executor/models/gpt2.py

@@ -275,7 +275,6 @@ class GPT2LMHeadModel(nn.Module):
                 if not name.endswith(".weight"):
                     continue
                 loaded_weight = loaded_weight.t()
-
             weight_loader = getattr(param, "weight_loader",
                                     default_weight_loader)
             weight_loader(param, loaded_weight)

vllm/model_executor/models/gpt_j.py

@@ -274,11 +274,18 @@ class GPTJForCausalLM(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/models/gpt_neox.py

@@ -72,7 +72,6 @@ class GPTNeoXAttention(nn.Module):
             config.hidden_size,
             linear_method=linear_method,
         )
-
         scaling = self.head_size**-0.5
         rotary_dim = int(self.head_size * config.rotary_pct)
         assert rotary_dim % 2 == 0

vllm/model_executor/models/internlm.py

@@ -289,11 +289,18 @@ class InternLMForCausalLM(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/models/llama.py

@@ -330,11 +330,18 @@ class LlamaForCausalLM(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/models/mistral.py

@@ -321,11 +321,18 @@ class MistralForCausalLM(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/models/mixtral.py

@@ -153,7 +153,7 @@ class MixtralMoE(nn.Module):
         self.gate = ReplicatedLinear(config.hidden_size,
                                      self.num_total_experts,
                                      bias=False,
-                                     linear_method=linear_method)
+                                     linear_method=None)
 
     def forward(self, hidden_states: torch.Tensor) -> torch.Tensor:
         batch_size, sequence_length, hidden_dim = hidden_states.shape
@@ -418,11 +418,18 @@ class MixtralForCausalLM(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/models/mpt.py

@@ -297,6 +297,9 @@ class MPTForCausalLM(nn.Module):
         params_dict = dict(self.named_parameters(remove_duplicate=False))
         for name, loaded_weight in hf_model_weights_iterator(
                 model_name_or_path, cache_dir, load_format, revision):
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
             param = params_dict[name]
             weight_loader = getattr(param, "weight_loader",
                                     default_weight_loader)

vllm/model_executor/models/opt.py

@@ -345,11 +345,18 @@ class OPTForCausalLM(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/models/phi_1_5.py

@@ -305,6 +305,9 @@ class PhiForCausalLM(nn.Module):
             if "rotary_emb.inv_freq" in name:
                 continue
 
+            # Skip loading extra bias for GPTQ models.
+            if name.endswith(".bias") and name not in params_dict:
+                continue
             # pylint: disable=E1136
             param = params_dict[name]
             weight_loader = getattr(param, "weight_loader",

vllm/model_executor/models/qwen.py

@@ -82,7 +82,6 @@ class QWenAttention(nn.Module):
         self.num_heads = (self.total_num_heads //
                           tensor_model_parallel_world_size)
         self.head_dim = hidden_size // self.total_num_heads
-
         self.c_attn = QKVParallelLinear(
             hidden_size,
             self.head_dim,
@@ -279,11 +278,18 @@ class QWenLMHeadModel(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/models/yi.py

@@ -320,11 +320,18 @@ class YiForCausalLM(nn.Module):
             for (param_name, weight_name, shard_id) in stacked_params_mapping:
                 if weight_name not in name:
                     continue
-                param = params_dict[name.replace(weight_name, param_name)]
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                param = params_dict[name]
                 weight_loader = param.weight_loader
                 weight_loader(param, loaded_weight, shard_id)
                 break
             else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
                 param = params_dict[name]
                 weight_loader = getattr(param, "weight_loader",
                                         default_weight_loader)

vllm/model_executor/weight_utils.py

@@ -287,4 +287,5 @@ def initialize_dummy_weights(
     values between -1e-3 and 1e-3 works well for most models.
     """
     for param in model.state_dict().values():
+        if torch.is_floating_point(param):
             param.data.uniform_(low, high)