Allow passing session_options for ORT backend (#620)

src/diffusers/onnx_utils.py

@@ -46,7 +46,7 @@ class OnnxRuntimeModel:
         return self.model.run(None, inputs)
 
     @staticmethod
-    def load_model(path: Union[str, Path], provider=None):
+    def load_model(path: Union[str, Path], provider=None, sess_options=None):
         """
         Loads an ONNX Inference session with an ExecutionProvider. Default provider is `CPUExecutionProvider`
 
@@ -60,7 +60,7 @@ class OnnxRuntimeModel:
             logger.info("No onnxruntime provider specified, using CPUExecutionProvider")
             provider = "CPUExecutionProvider"
 
-        return ort.InferenceSession(path, providers=[provider])
+        return ort.InferenceSession(path, providers=[provider], sess_options=sess_options)
 
     def _save_pretrained(self, save_directory: Union[str, Path], file_name: Optional[str] = None, **kwargs):
         """
@@ -114,6 +114,7 @@ class OnnxRuntimeModel:
         cache_dir: Optional[str] = None,
         file_name: Optional[str] = None,
         provider: Optional[str] = None,
+        sess_options: Optional[ort.SessionOptions] = None,
         **kwargs,
     ):
         """
@@ -143,7 +144,9 @@ class OnnxRuntimeModel:
         model_file_name = file_name if file_name is not None else ONNX_WEIGHTS_NAME
         # load model from local directory
         if os.path.isdir(model_id):
-            model = OnnxRuntimeModel.load_model(os.path.join(model_id, model_file_name), provider=provider)
+            model = OnnxRuntimeModel.load_model(
+                os.path.join(model_id, model_file_name), provider=provider, sess_options=sess_options
+            )
             kwargs["model_save_dir"] = Path(model_id)
         # load model from hub
         else:
@@ -158,7 +161,7 @@ class OnnxRuntimeModel:
             )
             kwargs["model_save_dir"] = Path(model_cache_path).parent
             kwargs["latest_model_name"] = Path(model_cache_path).name
-            model = OnnxRuntimeModel.load_model(model_cache_path, provider=provider)
+            model = OnnxRuntimeModel.load_model(model_cache_path, provider=provider, sess_options=sess_options)
         return cls(model=model, **kwargs)
 
     @classmethod

src/diffusers/pipeline_utils.py

@@ -282,6 +282,7 @@ class DiffusionPipeline(ConfigMixin):
         revision = kwargs.pop("revision", None)
         torch_dtype = kwargs.pop("torch_dtype", None)
         provider = kwargs.pop("provider", None)
+        sess_options = kwargs.pop("sess_options", None)
 
         # 1. Download the checkpoints and configs
         # use snapshot download here to get it working from from_pretrained
@@ -398,6 +399,7 @@ class DiffusionPipeline(ConfigMixin):
                     loading_kwargs["torch_dtype"] = torch_dtype
                 if issubclass(class_obj, diffusers.OnnxRuntimeModel):
                     loading_kwargs["provider"] = provider
+                    loading_kwargs["sess_options"] = sess_options
 
                 # check if the module is in a subdirectory
                 if os.path.isdir(os.path.join(cached_folder, name)):