[Model] Use autoweightloader for dbrx (#18251)

Signed-off-by: learner0810 <zhongjun.li@daocloud.io>

vllm/model_executor/models/dbrx.py

@@ -26,7 +26,7 @@ from vllm.sequence import IntermediateTensors
 from vllm.transformers_utils.configs.dbrx import DbrxConfig
 
 from .interfaces import SupportsPP
-from .utils import (is_pp_missing_parameter,
+from .utils import (AutoWeightsLoader, is_pp_missing_parameter,
                     make_empty_intermediate_tensors_factory, make_layers,
                     maybe_prefix)
 
@@ -319,6 +319,7 @@ class DbrxModel(nn.Module):
         cache_config = vllm_config.cache_config
         quant_config = vllm_config.quant_config
 
+        self.quant_config = quant_config
         self.wte = VocabParallelEmbedding(
             config.vocab_size,
             config.d_model,
@@ -364,6 +365,55 @@ class DbrxModel(nn.Module):
         hidden_states = self.norm_f(hidden_states)
         return hidden_states
 
+    def load_weights(self, weights: Iterable[tuple[str,
+                                                   torch.Tensor]]) -> set[str]:
+        expert_params_mapping = [(
+            "w13" if weight_name in ["w1", "v1"] else "w2",
+            f"mlp.{weight_name}",
+        ) for weight_name in ["w1", "v1", "w2"]]
+        params_dict = dict(self.named_parameters(remove_duplicate=False))
+        loaded_params: set[str] = set()
+
+        for name, loaded_weight in weights:
+            if (self.quant_config is not None and
+                (scale_name := self.quant_config.get_cache_scale(name))):
+                # Loading kv cache quantization scales
+                param = params_dict[scale_name]
+                weight_loader = getattr(param, "weight_loader",
+                                        default_weight_loader)
+                loaded_weight = (loaded_weight if loaded_weight.dim() == 0 else
+                                 loaded_weight[0])
+                weight_loader(param, loaded_weight)
+                loaded_params.add(scale_name)
+                continue
+
+            if name.endswith(("w1", "w2", "v1")):
+                name = name + "_weight"
+            for param_name, weight_name in expert_params_mapping:
+                if weight_name not in name:
+                    continue
+                name = name.replace(weight_name, param_name)
+                if is_pp_missing_parameter(name, self):
+                    continue
+                param = params_dict[name]
+                weight_loader = param.weight_loader
+                weight_loader(param, loaded_weight, weight_name, name)
+                break
+
+            else:
+                if is_pp_missing_parameter(name, self):
+                    continue
+                # Remapping the name of FP8 kv-scale.
+                name = maybe_remap_kv_scale_name(name, params_dict)
+                if name is None:
+                    continue
+                param = params_dict[name]
+                weight_loader = getattr(param, "weight_loader",
+                                        default_weight_loader)
+                weight_loader(param, loaded_weight)
+            loaded_params.add(name)
+        return loaded_params
+
 
 class DbrxForCausalLM(nn.Module, SupportsPP):
 
@@ -417,49 +467,5 @@ class DbrxForCausalLM(nn.Module, SupportsPP):
 
     def load_weights(self, weights: Iterable[tuple[str,
                                                    torch.Tensor]]) -> set[str]:
-        expert_params_mapping = [(
-            "w13" if weight_name in ["w1", "v1"] else "w2",
-            f"mlp.{weight_name}",
-        ) for weight_name in ["w1", "v1", "w2"]]
-        params_dict = dict(self.named_parameters(remove_duplicate=False))
-        loaded_params: set[str] = set()
-
-        for name, loaded_weight in weights:
-            if (self.quant_config is not None and
-                (scale_name := self.quant_config.get_cache_scale(name))):
-                # Loading kv cache quantization scales
-                param = params_dict[scale_name]
-                weight_loader = getattr(param, "weight_loader",
-                                        default_weight_loader)
-                loaded_weight = (loaded_weight if loaded_weight.dim() == 0 else
-                                 loaded_weight[0])
-                weight_loader(param, loaded_weight)
-                loaded_params.add(scale_name)
-                continue
-
-            if name.endswith(("w1", "w2", "v1")):
-                name = name + "_weight"
-            for param_name, weight_name in expert_params_mapping:
-                if weight_name not in name:
-                    continue
-                name = name.replace(weight_name, param_name)
-                if is_pp_missing_parameter(name, self):
-                    continue
-                param = params_dict[name]
-                weight_loader = param.weight_loader
-                weight_loader(param, loaded_weight, weight_name, name)
-                break
-
-            else:
-                if is_pp_missing_parameter(name, self):
-                    continue
-                # Remapping the name of FP8 kv-scale.
-                name = maybe_remap_kv_scale_name(name, params_dict)
-                if name is None:
-                    continue
-                param = params_dict[name]
-                weight_loader = getattr(param, "weight_loader",
-                                        default_weight_loader)
-                weight_loader(param, loaded_weight)
-            loaded_params.add(name)
-        return loaded_params
+        loader = AutoWeightsLoader(self)
+        return loader.load_weights(weights)