revamp model card to work by default and provide quanto hints

documentation/quickstart/SD3.md

@@ -276,7 +276,9 @@ The following values are recommended for `config.json`:
   "--validation_guidance_skip_layers_start": 0.01,
   "--validation_guidance_skip_layers_stop": 0.2,
   "--validation_guidance_skip_scale": 2.8,
-  "--validation_guidance": 4.0
+  "--validation_guidance": 4.0,
+  "--flux_use_uniform_schedule": true,
+  "--flux_schedule_auto_shift": true
 }
 ```
 
@@ -308,7 +310,8 @@ Some changes were made to SimpleTuner's SD3.5 support:
 - Offering a switch (`--sd3_clip_uncond_behaviour` and `--sd3_t5_uncond_behaviour`) to use empty encoded blank captions for unconditional predictions (`empty_string`, **default**) or zeros (`zero`), not a recommended setting to tweak.
 - SD3.5 training loss function was updated to match that found in the upstream StabilityAI/SD3.5 repository
 - Updated default `--flux_schedule_shift` value to 3 to match the static 1024px value for SD3
-  - 512px training requires the use of `--flux_schedule_shift=1`
+  - StabilityAI followed-up with documentation to use `--flux_schedule_shift=1` with `--flux_use_uniform_schedule`
+  - Community members have reported that `--flux_schedule_auto_shift` works better when using mult-aspect or multi-resolution training
 - Updated the hard-coded tokeniser sequence length limit to **256** with the option to revert it to **77** tokens to save disk space or compute at the cost of output quality degradation
 
 

helpers/caching/text_embeds.py

@@ -249,9 +249,13 @@ def batch_write_embeddings(self):
                     if len(batch) > 0:
                         self.process_write_batch(batch)
                         self.write_thread_bar.update(len(batch))
-                    logger.debug(f"Exiting batch write thread, no more work to do after writing {written_elements} elements")
+                    logger.debug(
+                        f"Exiting batch write thread, no more work to do after writing {written_elements} elements"
+                    )
                     break
-                logger.debug(f"Queue is empty. Retrieving new entries. Should retrieve? {self.process_write_batches}")
+                logger.debug(
+                    f"Queue is empty. Retrieving new entries. Should retrieve? {self.process_write_batches}"
+                )
                 pass
             except Exception:
                 logger.exception("An error occurred while writing embeddings to disk.")
@@ -525,9 +529,7 @@ def encode_prompt(self, prompt: str, is_validation: bool = False):
                 prompt,
                 is_validation,
                 zero_padding_tokens=(
-                    True
-                    if StateTracker.get_args().t5_padding == "zero"
-                    else False
+                    True if StateTracker.get_args().t5_padding == "zero" else False
                 ),
             )
         else:
@@ -1320,7 +1322,9 @@ def compute_embeddings_for_sd3_prompts(
                         )
                 if should_encode:
                     # If load_from_cache is True, should_encode would be False unless we failed to load.
-                    self.debug_log(f"Encoding filename {filename} :: device {self.text_encoders[0].device} :: prompt {prompt}")
+                    self.debug_log(
+                        f"Encoding filename {filename} :: device {self.text_encoders[0].device} :: prompt {prompt}"
+                    )
                     prompt_embeds, pooled_prompt_embeds = self.encode_sd3_prompt(
                         self.text_encoders,
                         self.tokenizers,

helpers/data_backend/factory.py

@@ -50,7 +50,9 @@ def info_log(message):
         logger.info(message)
 
 
-def check_column_values(column_data, column_name, parquet_path, fallback_caption_column=False):
+def check_column_values(
+    column_data, column_name, parquet_path, fallback_caption_column=False
+):
     # Determine if the column contains arrays or scalar values
     non_null_values = column_data.dropna()
     if non_null_values.empty:
@@ -362,15 +364,15 @@ def configure_parquet_database(backend: dict, args, data_backend: BaseDataBacken
         df[caption_column],
         caption_column,
         parquet_path,
-        fallback_caption_column=fallback_caption_column
+        fallback_caption_column=fallback_caption_column,
     )
 
     # Apply the function to the filename_column.
     check_column_values(
         df[filename_column],
         filename_column,
         parquet_path,
-        fallback_caption_column=False  # Always check filename_column
+        fallback_caption_column=False,  # Always check filename_column
     )
 
     # Store the database in StateTracker

helpers/image_manipulation/training_sample.py

@@ -80,7 +80,10 @@ def __init__(
         self.resolution = self.data_backend_config.get("resolution")
         self.resolution_type = self.data_backend_config.get("resolution_type")
         self.target_size_calculator = resize_helpers.get(self.resolution_type)
-        if self.target_size_calculator is None and conditioning_type not in ["mask", "controlnet"]:
+        if self.target_size_calculator is None and conditioning_type not in [
+            "mask",
+            "controlnet",
+        ]:
             raise ValueError(f"Unknown resolution type: {self.resolution_type}")
         self._set_resolution()
         self.target_downsample_size = self.data_backend_config.get(

helpers/models/flux/pipeline.py

@@ -824,16 +824,16 @@ def __call__(
 
                 noise_pred = self.transformer(
                     hidden_states=latents.to(
-                        device=self.transformer.device # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
+                        device=self.transformer.device  # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
                     ),
                     # YiYi notes: divide it by 1000 for now because we scale it by 1000 in the transforme rmodel (we should not keep it but I want to keep the inputs same for the model for testing)
                     timestep=timestep / 1000,
                     guidance=guidance,
                     pooled_projections=pooled_prompt_embeds.to(
-                        device=self.transformer.device # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
+                        device=self.transformer.device  # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
                     ),
                     encoder_hidden_states=prompt_embeds.to(
-                        device=self.transformer.device # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
+                        device=self.transformer.device  # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
                     ),
                     txt_ids=text_ids,
                     img_ids=latent_image_ids,
@@ -846,16 +846,16 @@ def __call__(
                 if guidance_scale_real > 1.0 and i >= no_cfg_until_timestep:
                     noise_pred_uncond = self.transformer(
                         hidden_states=latents.to(
-                            device=self.transformer.device # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
+                            device=self.transformer.device  # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
                         ),
                         # YiYi notes: divide it by 1000 for now because we scale it by 1000 in the transforme rmodel (we should not keep it but I want to keep the inputs same for the model for testing)
                         timestep=timestep / 1000,
                         guidance=guidance,
                         pooled_projections=negative_pooled_prompt_embeds.to(
-                            device=self.transformer.device # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
+                            device=self.transformer.device  # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
                         ),
                         encoder_hidden_states=negative_prompt_embeds.to(
-                            device=self.transformer.device # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
+                            device=self.transformer.device  # , dtype=self.transformer.dtype     # can't cast dtype like this because of NF4
                         ),
                         txt_ids=negative_text_ids.to(device=self.transformer.device),
                         img_ids=latent_image_ids.to(device=self.transformer.device),

helpers/prompts.py

@@ -266,7 +266,9 @@ def prepare_instance_prompt_from_parquet(
         if type(image_caption) == str:
             image_caption = image_caption.strip()
         if type(image_caption) in (list, tuple, numpy.ndarray, pd.Series):
-            image_caption = [str(item).strip() for item in image_caption if item is not None]
+            image_caption = [
+                str(item).strip() for item in image_caption if item is not None
+            ]
         if prepend_instance_prompt:
             if type(image_caption) == list:
                 image_caption = [instance_prompt + " " + x for x in image_caption]

helpers/publishing/metadata.py

@@ -105,7 +105,38 @@ def _model_imports(args):
     return f"{output}"
 
 
+def lycoris_download_info():
+    """output a function to download the adapter"""
+    output_fn = """
+def download_adapter(repo_id: str):
+    import os
+    from huggingface_hub import hf_hub_download
+    adapter_filename = "pytorch_lora_weights.safetensors"
+    cache_dir = os.environ.get('HF_PATH', os.path.expanduser('~/.cache/huggingface/hub/models'))
+    cleaned_adapter_path = repo_id.replace("/", "_").replace("\\\\", "_").replace(":", "_")
+    path_to_adapter = os.path.join(cache_dir, cleaned_adapter_path)
+    path_to_adapter_file = os.path.join(path_to_adapter, adapter_filename)
+    os.makedirs(path_to_adapter, exist_ok=True)
+    hf_hub_download(
+        repo_id=repo_id, filename=adapter_filename, local_dir=path_to_adapter
+    )
+
+    return path_to_adapter_file
+    """
+
+    return output_fn
+
+
+def _model_component_name(args):
+    model_component_name = "pipeline.transformer"
+    if args.model_family in ["sdxl", "kolors", "legacy", "deepfloyd"]:
+        model_component_name = "pipeline.unet"
+
+    return model_component_name
+
+
 def _model_load(args, repo_id: str = None):
+    model_component_name = _model_component_name(args)
     hf_user_name = StateTracker.get_hf_username()
     if hf_user_name is not None:
         repo_id = f"{hf_user_name}/{repo_id}" if hf_user_name else repo_id
@@ -114,22 +145,26 @@ def _model_load(args, repo_id: str = None):
             output = (
                 f"model_id = '{args.pretrained_model_name_or_path}'"
                 f"\nadapter_id = '{repo_id if repo_id is not None else args.output_dir}'"
-                f"\npipeline = DiffusionPipeline.from_pretrained(model_id)"
+                f"\npipeline = DiffusionPipeline.from_pretrained(model_id), torch_dtype={StateTracker.get_weight_dtype()}) # loading directly in bf16"
                 f"\npipeline.load_lora_weights(adapter_id)"
             )
         elif args.lora_type.lower() == "lycoris":
             output = (
-                f"model_id = '{args.pretrained_model_name_or_path}'"
-                f"\nadapter_id = 'pytorch_lora_weights.safetensors' # you will have to download this manually"
+                f"{lycoris_download_info()}"
+                f"\nmodel_id = '{args.pretrained_model_name_or_path}'"
+                f"\nadapter_repo_id = '{repo_id if repo_id is not None else args.output_dir}'"
+                f"\nadapter_filename = 'pytorch_lora_weights.safetensors'"
+                f"\nadapter_file_path = download_adapter(repo_id=adapter_repo_id)"
+                f"\npipeline = DiffusionPipeline.from_pretrained(model_id, torch_dtype={StateTracker.get_weight_dtype()}) # loading directly in bf16"
                 "\nlora_scale = 1.0"
             )
     else:
         output = (
             f"model_id = '{repo_id if repo_id else os.path.join(args.output_dir, 'pipeline')}'"
-            f"\npipeline = DiffusionPipeline.from_pretrained(model_id)"
+            f"\npipeline = DiffusionPipeline.from_pretrained(model_id, torch_dtype={StateTracker.get_weight_dtype()}) # loading directly in bf16"
         )
     if args.model_type == "lora" and args.lora_type.lower() == "lycoris":
-        output += f"\nwrapper, _ = create_lycoris_from_weights(lora_scale, adapter_id, pipeline.transformer)"
+        output += f"\nwrapper, _ = create_lycoris_from_weights(lora_scale, adapter_file_path, {model_component_name})"
         output += "\nwrapper.merge_to()"
 
     return output
@@ -162,6 +197,33 @@ def _skip_layers(args):
     return f"\n    skip_guidance_layers={args.validation_guidance_skip_layers},"
 
 
+def _pipeline_move_to(args):
+    output = f"pipeline.to({_torch_device()}) # the pipeline is already in its target precision level"
+
+    return output
+
+
+def _pipeline_quanto(args):
+    # return some optional lines to run Quanto on the model pipeline
+    if args.model_type == "full":
+        return ""
+    model_component_name = _model_component_name(args)
+    comment_character = ""
+    was_quantised = "The model was quantised during training, and so it is recommended to do the same during inference time."
+    if args.base_model_precision == "no_change":
+        comment_character = "#"
+        was_quantised = "The model was not quantised during training, so it is not necessary to quantise it during inference time."
+    output = f"""
+## Optional: quantise the model to save on vram.
+## Note: {was_quantised}
+{comment_character}from optimum.quanto import quantize, freeze, qint8
+{comment_character}quantize({model_component_name}, weights=qint8)
+{comment_character}freeze({model_component_name})
+    """
+
+    return output
+
+
 def _validation_resolution(args):
     if args.validation_resolution == "" or args.validation_resolution is None:
         return f"width=1024,\n" f"    height=1024,"
@@ -188,13 +250,14 @@ def code_example(args, repo_id: str = None):
 
 prompt = "{args.validation_prompt if args.validation_prompt else 'An astronaut is riding a horse through the jungles of Thailand.'}"
 {_negative_prompt(args)}
-pipeline.to({_torch_device()})
+{_pipeline_quanto(args)}
+{_pipeline_move_to(args)}
 image = pipeline(
     prompt=prompt,{_negative_prompt(args, in_call=True) if args.model_family.lower() != 'flux' else ''}
     num_inference_steps={args.validation_num_inference_steps},
     generator=torch.Generator(device={_torch_device()}).manual_seed(1641421826),
     {_validation_resolution(args)}
-    guidance_scale={args.validation_guidance},{_guidance_rescale(args)},{_skip_layers(args)}
+    guidance_scale={args.validation_guidance},{_guidance_rescale(args)}{_skip_layers(args)}
 ).images[0]
 image.save("output.png", format="PNG")
 ```
@@ -226,7 +289,10 @@ def lora_info(args):
         lycoris_config_file = args.lycoris_config
         # read the json file
         with open(lycoris_config_file, "r") as file:
-            lycoris_config = json.load(file)
+            try:
+                lycoris_config = json.load(file)
+            except:
+                lycoris_config = {"error": "could not locate or load LyCORIS config."}
         return f"""- LyCORIS Config:\n```json\n{json.dumps(lycoris_config, indent=4)}\n```"""
 
 

helpers/training/default_settings/safety_check.py

@@ -109,7 +109,8 @@ def safety_check(args, accelerator):
         sys.exit(1)
 
     if (
-        args.flux_schedule_shift is not None and args.flux_schedule_shift > 0
+        args.flux_schedule_shift is not None
+        and args.flux_schedule_shift > 0
         and args.flux_schedule_auto_shift
     ):
         logger.error(

helpers/training/trainer.py

@@ -2183,9 +2183,11 @@ def train(self):
                         )
                     training_logger.debug(f"Working on batch size: {bsz}")
                     if self.config.flow_matching:
-                        if (
-                            not self.config.flux_fast_schedule
-                            and not any([self.config.flux_use_beta_schedule, self.config.flux_use_uniform_schedule])
+                        if not self.config.flux_fast_schedule and not any(
+                            [
+                                self.config.flux_use_beta_schedule,
+                                self.config.flux_use_uniform_schedule,
+                            ]
                         ):
                             # imported from cloneofsimo's minRF trainer: https://github.com/cloneofsimo/minRF
                             # also used by: https://github.com/XLabs-AI/x-flux/tree/main
@@ -2316,7 +2318,9 @@ def train(self):
                         elif self.config.flow_matching_loss == "compatible":
                             target = noise - latents
                         elif self.config.flow_matching_loss == "sd35":
-                            sigma_reshaped = sigmas.view(-1, 1, 1, 1)  # Ensure sigma has the correct shape
+                            sigma_reshaped = sigmas.view(
+                                -1, 1, 1, 1
+                            )  # Ensure sigma has the correct shape
                             target = (noisy_latents - latents) / sigma_reshaped
 
                     elif self.noise_scheduler.config.prediction_type == "epsilon":

helpers/training/validation.py

@@ -642,7 +642,9 @@ def _gather_prompt_embeds(self, validation_prompt: str):
                     device=self.inference_device, dtype=self.weight_dtype
                 )
             )
-            prompt_embeds["pooled_prompt_embeds"] = current_validation_pooled_embeds
+            prompt_embeds["pooled_prompt_embeds"] = current_validation_pooled_embeds.to(
+                device=self.inference_device, dtype=self.weight_dtype
+            )
             prompt_embeds["negative_pooled_prompt_embeds"] = (
                 self.validation_negative_pooled_embeds
             )
@@ -662,7 +664,9 @@ def _gather_prompt_embeds(self, validation_prompt: str):
                 current_validation_prompt_embeds, current_validation_prompt_mask = (
                     current_validation_prompt_embeds
                 )
-                current_validation_prompt_embeds = current_validation_prompt_embeds[0]
+                current_validation_prompt_embeds = current_validation_prompt_embeds[
+                    0
+                ].to(device=self.inference_device, dtype=self.weight_dtype)
                 if (
                     type(self.validation_negative_prompt_embeds) is tuple
                     or type(self.validation_negative_prompt_embeds) is list
@@ -672,7 +676,9 @@ def _gather_prompt_embeds(self, validation_prompt: str):
                         self.validation_negative_prompt_mask,
                     ) = self.validation_negative_prompt_embeds[0]
             else:
-                current_validation_prompt_embeds = current_validation_prompt_embeds[0]
+                current_validation_prompt_embeds = current_validation_prompt_embeds[
+                    0
+                ].to(device=self.inference_device, dtype=self.weight_dtype)
             # logger.debug(
             #     f"Validations received the prompt embed: ({type(current_validation_prompt_embeds)}) positive={current_validation_prompt_embeds.shape if type(current_validation_prompt_embeds) is not list else current_validation_prompt_embeds[0].shape},"
             #     f" ({type(self.validation_negative_prompt_embeds)}) negative={self.validation_negative_prompt_embeds.shape if type(self.validation_negative_prompt_embeds) is not list else self.validation_negative_prompt_embeds[0].shape}"