[Feat] Add _set_model_kwargs_torch_dtype for HF model (#507)

* add _set_model_kwargs_torch_dtype for hf models

* add logger

opencompass/models/huggingface.py

@@ -131,13 +131,28 @@ class HuggingFace(BaseModel):
             self.tokenizer.eos_token = '</s>'
             self.tokenizer.pad_token_id = 0
 
+    def _set_model_kwargs_torch_dtype(self, model_kwargs):
+        if 'torch_dtype' not in model_kwargs:
+            torch_dtype = torch.float16
+        else:
+            torch_dtype = {
+                'torch.float16': torch.float16,
+                'torch.bfloat16': torch.bfloat16,
+                'torch.float': torch.float,
+                'auto': 'auto',
+                'None': None
+            }.get(model_kwargs['torch_dtype'])
+        self.logger.debug(f'HF using torch_dtype: {torch_dtype}')
+        if torch_dtype is not None:
+            model_kwargs['torch_dtype'] = torch_dtype
+
     def _load_model(self,
                     path: str,
                     model_kwargs: dict,
                     peft_path: Optional[str] = None):
         from transformers import AutoModel, AutoModelForCausalLM
 
-        model_kwargs.setdefault('torch_dtype', torch.float16)
+        self._set_model_kwargs_torch_dtype(model_kwargs)
         try:
             self.model = AutoModelForCausalLM.from_pretrained(
                 path, **model_kwargs)
@@ -409,7 +424,7 @@ class HuggingFaceCausalLM(HuggingFace):
                     peft_path: Optional[str] = None):
         from transformers import AutoModelForCausalLM
 
-        model_kwargs.setdefault('torch_dtype', torch.float16)
+        self._set_model_kwargs_torch_dtype(model_kwargs)
         self.model = AutoModelForCausalLM.from_pretrained(path, **model_kwargs)
         if peft_path is not None:
             from peft import PeftModel

run.py

@@ -175,8 +175,14 @@ def parse_hf_args(hf_parser):
     hf_parser.add_argument('--hf-path', type=str)
     hf_parser.add_argument('--peft-path', type=str)
     hf_parser.add_argument('--tokenizer-path', type=str)
-    hf_parser.add_argument('--model-kwargs', nargs='+', action=DictAction)
-    hf_parser.add_argument('--tokenizer-kwargs', nargs='+', action=DictAction)
+    hf_parser.add_argument('--model-kwargs',
+                           nargs='+',
+                           action=DictAction,
+                           default={})
+    hf_parser.add_argument('--tokenizer-kwargs',
+                           nargs='+',
+                           action=DictAction,
+                           default={})
     hf_parser.add_argument('--max-out-len', type=int)
     hf_parser.add_argument('--max-seq-len', type=int)
     hf_parser.add_argument('--no-batch-padding',