Merge branch 'main' into maryhipp/optional-version

invokeai/backend/model_management/model_cache.py

@@ -328,6 +328,25 @@ class ModelCache(object):
 
             refs = sys.getrefcount(cache_entry.model)
 
+            # manualy clear local variable references of just finished function calls
+            # for some reason python don't want to collect it even by gc.collect() immidiately
+            if refs > 2:
+                while True:
+                    cleared = False
+                    for referrer in gc.get_referrers(cache_entry.model):
+                        if type(referrer).__name__ == "frame":
+                            # RuntimeError: cannot clear an executing frame
+                            with suppress(RuntimeError):
+                                referrer.clear()
+                                cleared = True
+                                #break
+
+                    # repeat if referrers changes(due to frame clear), else exit loop
+                    if cleared:
+                        gc.collect()
+                    else:
+                        break
+
             device = cache_entry.model.device if hasattr(cache_entry.model, "device") else None
             self.logger.debug(f"Model: {model_key}, locks: {cache_entry._locks}, device: {device}, loaded: {cache_entry.loaded}, refs: {refs}")
 
@@ -364,6 +383,9 @@ class ModelCache(object):
                 vram_in_use += mem.vram_used  # note vram_used is negative
                 self.logger.debug(f'{(vram_in_use/GIG):.2f}GB VRAM used for models; max allowed={(reserved/GIG):.2f}GB')
 
+        gc.collect()
+        torch.cuda.empty_cache()
+        
     def _local_model_hash(self, model_path: Union[str, Path]) -> str:
         sha = hashlib.sha256()
         path = Path(model_path)

invokeai/backend/model_management/model_manager.py

@@ -140,14 +140,14 @@ Layout of the `models` directory:
 
  models
  ├── sd-1
- │   ├── controlnet
- │   ├── lora
- │   ├── main
- │   └── embedding
+ │   ├── controlnet
+ │   ├── lora
+ │   ├── main
+ │   └── embedding
  ├── sd-2
- │   ├── controlnet
- │   ├── lora
- │   ├── main
+ │   ├── controlnet
+ │   ├── lora
+ │   ├── main
  │   └── embedding
  └── core
      ├── face_reconstruction
@@ -824,10 +824,14 @@ class ModelManager(object):
         assert config_file_path is not None,'no config file path to write to'
         config_file_path = self.app_config.root_path / config_file_path
         tmpfile = os.path.join(os.path.dirname(config_file_path), "new_config.tmp")
+        try:
             with open(tmpfile, "w", encoding="utf-8") as outfile:
                 outfile.write(self.preamble())
                 outfile.write(yaml_str)
             os.replace(tmpfile, config_file_path)
+        except OSError as err:
+            self.logger.warning(f"Could not modify the config file at {config_file_path}")
+            self.logger.warning(err)
 
     def preamble(self) -> str:
         """
@@ -986,4 +990,3 @@ class ModelManager(object):
             successfully_installed.update(installed)
         self.commit()
         return successfully_installed
-