Fix some issues with inference slowing down.

comfy/model_management.py

@@ -296,7 +296,7 @@ class LoadedModel:
 
     def model_memory_required(self, device):
         if device == self.model.current_loaded_device():
-            return 0
+            return self.model_offloaded_memory()
         else:
             return self.model_memory()
 
@@ -308,15 +308,21 @@ class LoadedModel:
 
         load_weights = not self.weights_loaded
 
-        try:
+        if self.model.loaded_size() > 0:
-            if lowvram_model_memory > 0 and load_weights:
+            use_more_vram = lowvram_model_memory
-                self.real_model = self.model.patch_model_lowvram(device_to=patch_model_to, lowvram_model_memory=lowvram_model_memory, force_patch_weights=force_patch_weights)
+            if use_more_vram == 0:
-            else:
+                use_more_vram = 1e32
-                self.real_model = self.model.patch_model(device_to=patch_model_to, patch_weights=load_weights)
+            self.model_use_more_vram(use_more_vram)
-        except Exception as e:
+        else:
-            self.model.unpatch_model(self.model.offload_device)
+            try:
-            self.model_unload()
+                if lowvram_model_memory > 0 and load_weights:
-            raise e
+                    self.real_model = self.model.patch_model_lowvram(device_to=patch_model_to, lowvram_model_memory=lowvram_model_memory, force_patch_weights=force_patch_weights)
+                else:
+                    self.real_model = self.model.patch_model(device_to=patch_model_to, patch_weights=load_weights)
+            except Exception as e:
+                self.model.unpatch_model(self.model.offload_device)
+                self.model_unload()
+                raise e
 
         if is_intel_xpu() and not args.disable_ipex_optimize:
             self.real_model = ipex.optimize(self.real_model.eval(), graph_mode=True, concat_linear=True)
@@ -484,18 +490,21 @@ def load_models_gpu(models, memory_required=0, force_patch_weights=False, minimu
 
     total_memory_required = {}
     for loaded_model in models_to_load:
-        if unload_model_clones(loaded_model.model, unload_weights_only=True, force_unload=False) == True:#unload clones where the weights are different
+        unload_model_clones(loaded_model.model, unload_weights_only=True, force_unload=False) #unload clones where the weights are different
-            total_memory_required[loaded_model.device] = total_memory_required.get(loaded_model.device, 0) + loaded_model.model_memory_required(loaded_model.device)
+        total_memory_required[loaded_model.device] = total_memory_required.get(loaded_model.device, 0) + loaded_model.model_memory_required(loaded_model.device)
 
-    for device in total_memory_required:
+    for loaded_model in models_already_loaded:
-        if device != torch.device("cpu"):
+        total_memory_required[loaded_model.device] = total_memory_required.get(loaded_model.device, 0) + loaded_model.model_memory_required(loaded_model.device)
-            free_memory(total_memory_required[device] * 1.3 + extra_mem, device, models_already_loaded)
 
     for loaded_model in models_to_load:
         weights_unloaded = unload_model_clones(loaded_model.model, unload_weights_only=False, force_unload=False) #unload the rest of the clones where the weights can stay loaded
         if weights_unloaded is not None:
             loaded_model.weights_loaded = not weights_unloaded
 
+    for device in total_memory_required:
+        if device != torch.device("cpu"):
+            free_memory(total_memory_required[device] * 1.1 + extra_mem, device, models_already_loaded)
+
     for loaded_model in models_to_load:
         model = loaded_model.model
         torch_dev = model.load_device

comfy/model_patcher.py

@@ -102,7 +102,7 @@ class ModelPatcher:
         self.size = size
         self.model = model
         if not hasattr(self.model, 'device'):
-            logging.info("Model doesn't have a device attribute.")
+            logging.debug("Model doesn't have a device attribute.")
             self.model.device = offload_device
         elif self.model.device is None:
             self.model.device = offload_device