Update calc_model_size_by_data(...) to handle all expected model types, and to log an error if an unexpected model type is received.

invokeai/backend/ip_adapter/ip_adapter.py

@@ -136,11 +136,11 @@ class IPAdapter(RawModel):
         self._image_proj_model.to(device=self.device, dtype=self.dtype, non_blocking=non_blocking)
         self.attn_weights.to(device=self.device, dtype=self.dtype, non_blocking=non_blocking)
 
-    def calc_size(self):
+    def calc_size(self) -> int:
-        # workaround for circular import
+        # HACK(ryand): Fix this issue with circular imports.
-        from invokeai.backend.model_manager.load.model_util import calc_model_size_by_data
+        from invokeai.backend.model_manager.load.model_util import calc_module_size
 
-        return calc_model_size_by_data(self._image_proj_model) + calc_model_size_by_data(self.attn_weights)
+        return calc_module_size(self._image_proj_model) + calc_module_size(self.attn_weights)
 
     def _init_image_proj_model(
         self, state_dict: dict[str, torch.Tensor]

invokeai/backend/model_manager/load/model_cache/model_cache_default.py

@@ -160,7 +160,7 @@ class ModelCache(ModelCacheBase[AnyModel]):
         key = self._make_cache_key(key, submodel_type)
         if key in self._cached_models:
             return
-        size = calc_model_size_by_data(model)
+        size = calc_model_size_by_data(self.logger, model)
         self.make_room(size)
 
         state_dict = model.state_dict() if isinstance(model, torch.nn.Module) else None

invokeai/backend/model_manager/load/model_util.py

@@ -2,25 +2,46 @@
 """Various utility functions needed by the loader and caching system."""
 
 import json
+import logging
 from pathlib import Path
 from typing import Optional
 
 import torch
-from diffusers import DiffusionPipeline
+from diffusers.pipelines.pipeline_utils import DiffusionPipeline
+from diffusers.schedulers.scheduling_utils import SchedulerMixin
+from transformers import CLIPTokenizer
 
+from invokeai.backend.ip_adapter.ip_adapter import IPAdapter
+from invokeai.backend.lora import LoRAModelRaw
 from invokeai.backend.model_manager.config import AnyModel
 from invokeai.backend.onnx.onnx_runtime import IAIOnnxRuntimeModel
+from invokeai.backend.textual_inversion import TextualInversionModelRaw
 
 
-def calc_model_size_by_data(model: AnyModel) -> int:
+def calc_model_size_by_data(logger: logging.Logger, model: AnyModel) -> int:
     """Get size of a model in memory in bytes."""
+    # TODO(ryand): We should create a CacheableModel interface for all models, and move the size calculations down to
+    # the models themselves.
     if isinstance(model, DiffusionPipeline):
         return _calc_pipeline_by_data(model)
     elif isinstance(model, torch.nn.Module):
-        return _calc_model_by_data(model)
+        return calc_module_size(model)
     elif isinstance(model, IAIOnnxRuntimeModel):
         return _calc_onnx_model_by_data(model)
+    elif isinstance(model, SchedulerMixin):
+        return 0
+    elif isinstance(model, CLIPTokenizer):
+        # TODO(ryand): Accurately calculate the tokenizer's size. It's small enough that it shouldn't matter for now.
+        return 0
+    elif isinstance(model, (TextualInversionModelRaw, IPAdapter, LoRAModelRaw)):
+        return model.calc_size()
     else:
+        # TODO(ryand): Promote this from a log to an exception once we are confident that we are handling all of the
+        # supported model types.
+        logger.error(
+            f"Failed to calculate model size for unexpected model type: {type(model)}. The model will be treated as "
+            "having size 0."
+        )
         return 0
 
 
@@ -30,11 +51,12 @@ def _calc_pipeline_by_data(pipeline: DiffusionPipeline) -> int:
     for submodel_key in pipeline.components.keys():
         submodel = getattr(pipeline, submodel_key)
         if submodel is not None and isinstance(submodel, torch.nn.Module):
-            res += _calc_model_by_data(submodel)
+            res += calc_module_size(submodel)
     return res
 
 
-def _calc_model_by_data(model: torch.nn.Module) -> int:
+def calc_module_size(model: torch.nn.Module) -> int:
+    """Calculate the size (in bytes) of a torch.nn.Module."""
     mem_params = sum([param.nelement() * param.element_size() for param in model.parameters()])
     mem_bufs = sum([buf.nelement() * buf.element_size() for buf in model.buffers()])
     mem: int = mem_params + mem_bufs  # in bytes

invokeai/backend/textual_inversion.py

@@ -77,6 +77,14 @@ class TextualInversionModelRaw(RawModel):
             if emb is not None:
                 emb.to(device=device, dtype=dtype, non_blocking=non_blocking)
 
+    def calc_size(self) -> int:
+        """Get the size of this model in bytes."""
+        embedding_size = self.embedding.element_size() * self.embedding.nelement()
+        embedding_2_size = 0
+        if self.embedding_2 is not None:
+            embedding_2_size = self.embedding_2.element_size() * self.embedding_2.nelement()
+        return embedding_size + embedding_2_size
+
 
 class TextualInversionManager(BaseTextualInversionManager):
     """TextualInversionManager implements the BaseTextualInversionManager ABC from the compel library."""