Support SDXL
Still experimental, some nodes overlap and should be renamed for clarity.
This commit is contained in:
kijai
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import os
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import torch
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import folder_paths
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import comfy.model_management as mm
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import comfy.utils
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import toml
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import json
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import time
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import shutil
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import shlex
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script_directory = os.path.dirname(os.path.abspath(__file__))
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from .sdxl_train_network import SdxlNetworkTrainer
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from .library import sdxl_train_util
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from .library.device_utils import init_ipex
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init_ipex()
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from .library import train_util
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from .train_network import setup_parser as train_network_setup_parser
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import logging
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logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
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logger = logging.getLogger(__name__)
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class SDXLModelSelect:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": {
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"checkpoint": (folder_paths.get_filename_list("checkpoints"), ),
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},
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"optional": {
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"lora_path": ("STRING",{"multiline": True, "forceInput": True, "default": "", "tooltip": "pre-trained LoRA path to load (network_weights)"}),
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}
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}
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RETURN_TYPES = ("TRAIN_SDXL_MODELS",)
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RETURN_NAMES = ("sdxl_models",)
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FUNCTION = "loadmodel"
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CATEGORY = "FluxTrainer/SDXL"
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def loadmodel(self, checkpoint, lora_path=""):
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checkpoint_path = folder_paths.get_full_path("checkpoints", checkpoint)
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SDXL_models = {
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"checkpoint": checkpoint_path,
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"lora_path": lora_path
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}
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return (SDXL_models,)
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class InitSDXLLoRATraining:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": {
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"SDXL_models": ("TRAIN_SDXL_MODELS",),
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"dataset": ("JSON",),
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"optimizer_settings": ("ARGS",),
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"output_name": ("STRING", {"default": "SDXL_lora", "multiline": False}),
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"output_dir": ("STRING", {"default": "SDXL_trainer_output", "multiline": False, "tooltip": "path to dataset, root is the 'ComfyUI' folder, with windows portable 'ComfyUI_windows_portable'"}),
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"network_dim": ("INT", {"default": 16, "min": 1, "max": 2048, "step": 1, "tooltip": "network dim"}),
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"network_alpha": ("FLOAT", {"default": 16, "min": 0.0, "max": 2048.0, "step": 0.01, "tooltip": "network alpha"}),
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"learning_rate": ("FLOAT", {"default": 1e-6, "min": 0.0, "max": 10.0, "step": 0.0000001, "tooltip": "learning rate"}),
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"max_train_steps": ("INT", {"default": 1500, "min": 1, "max": 100000, "step": 1, "tooltip": "max number of training steps"}),
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"cache_latents": (["disk", "memory", "disabled"], {"tooltip": "caches text encoder outputs"}),
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"cache_text_encoder_outputs": (["disk", "memory", "disabled"], {"tooltip": "caches text encoder outputs"}),
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"highvram": ("BOOLEAN", {"default": False, "tooltip": "memory mode"}),
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"blocks_to_swap": ("INT", {"default": 0, "min": 0, "max": 100, "step": 1, "tooltip": "option for memory use reduction. The maximum number of blocks that can be swapped is 36 for SDXL.5L and 22 for SDXL.5M"}),
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"fp8_base": ("BOOLEAN", {"default": False, "tooltip": "use fp8 for base model"}),
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"gradient_dtype": (["fp32", "fp16", "bf16"], {"default": "fp32", "tooltip": "the actual dtype training uses"}),
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"save_dtype": (["fp32", "fp16", "bf16", "fp8_e4m3fn", "fp8_e5m2"], {"default": "bf16", "tooltip": "the dtype to save checkpoints as"}),
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"attention_mode": (["sdpa", "xformers", "disabled"], {"default": "sdpa", "tooltip": "memory efficient attention mode"}),
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"train_text_encoder": (['disabled', 'clip_l',], {"default": 'disabled', "tooltip": "also train the selected text encoders using specified dtype, T5 can not be trained without clip_l"}),
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"clip_l_lr": ("FLOAT", {"default": 0, "min": 0.0, "max": 10.0, "step": 0.000001, "tooltip": "text encoder learning rate"}),
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"clip_g_lr": ("FLOAT", {"default": 0, "min": 0.0, "max": 10.0, "step": 0.000001, "tooltip": "text encoder learning rate"}),
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"sample_prompts_pos": ("STRING", {"multiline": True, "default": "illustration of a kitten | photograph of a turtle", "tooltip": "validation sample prompts, for multiple prompts, separate by `|`"}),
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"sample_prompts_neg": ("STRING", {"multiline": True, "default": "", "tooltip": "validation sample prompts, for multiple prompts, separate by `|`"}),
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"gradient_checkpointing": (["enabled", "disabled"], {"default": "enabled", "tooltip": "use gradient checkpointing"}),
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},
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"optional": {
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"additional_args": ("STRING", {"multiline": True, "default": "", "tooltip": "additional args to pass to the training command"}),
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"resume_args": ("ARGS", {"default": "", "tooltip": "resume args to pass to the training command"}),
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"block_args": ("ARGS", {"default": "", "tooltip": "limit the blocks used in the LoRA"}),
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"loss_args": ("ARGS", {"default": "", "tooltip": "loss args"}),
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},
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"hidden": {
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"prompt": "PROMPT", "extra_pnginfo": "EXTRA_PNGINFO"
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},
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}
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RETURN_TYPES = ("NETWORKTRAINER", "INT", "KOHYA_ARGS",)
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RETURN_NAMES = ("network_trainer", "epochs_count", "args",)
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FUNCTION = "init_training"
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CATEGORY = "FluxTrainer/SDXL"
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def init_training(self, SDXL_models, dataset, optimizer_settings, sample_prompts_pos, sample_prompts_neg, output_name, attention_mode,
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gradient_dtype, save_dtype, additional_args=None, resume_args=None, train_text_encoder='disabled',
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gradient_checkpointing="enabled", prompt=None, extra_pnginfo=None, clip_l_lr=0, clip_g_lr=0, loss_args=None, **kwargs):
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mm.soft_empty_cache()
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output_dir = os.path.abspath(kwargs.get("output_dir"))
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os.makedirs(output_dir, exist_ok=True)
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total, used, free = shutil.disk_usage(output_dir)
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required_free_space = 2 * (2**30)
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if free <= required_free_space:
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raise ValueError(f"Insufficient disk space. Required: {required_free_space/2**30}GB. Available: {free/2**30}GB")
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dataset_config = dataset["datasets"]
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dataset_toml = toml.dumps(json.loads(dataset_config))
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parser = train_network_setup_parser()
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#sdxl_train_util.add_sdxl_training_arguments(parser)
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if additional_args is not None:
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print(f"additional_args: {additional_args}")
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args, _ = parser.parse_known_args(args=shlex.split(additional_args))
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else:
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args, _ = parser.parse_known_args()
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if kwargs.get("cache_latents") == "memory":
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kwargs["cache_latents"] = True
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kwargs["cache_latents_to_disk"] = False
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elif kwargs.get("cache_latents") == "disk":
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kwargs["cache_latents"] = True
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kwargs["cache_latents_to_disk"] = True
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kwargs["caption_dropout_rate"] = 0.0
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kwargs["shuffle_caption"] = False
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kwargs["token_warmup_step"] = 0.0
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kwargs["caption_tag_dropout_rate"] = 0.0
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else:
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kwargs["cache_latents"] = False
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kwargs["cache_latents_to_disk"] = False
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if kwargs.get("cache_text_encoder_outputs") == "memory":
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kwargs["cache_text_encoder_outputs"] = True
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kwargs["cache_text_encoder_outputs_to_disk"] = False
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elif kwargs.get("cache_text_encoder_outputs") == "disk":
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kwargs["cache_text_encoder_outputs"] = True
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kwargs["cache_text_encoder_outputs_to_disk"] = True
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else:
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kwargs["cache_text_encoder_outputs"] = False
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kwargs["cache_text_encoder_outputs_to_disk"] = False
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if '|' in sample_prompts_pos:
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positive_prompts = sample_prompts_pos.split('|')
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else:
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positive_prompts = [sample_prompts_pos]
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if '|' in sample_prompts_neg:
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negative_prompts = sample_prompts_neg.split('|')
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else:
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negative_prompts = [sample_prompts_neg]
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config_dict = {
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"sample_prompts": positive_prompts,
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"negative_prompts": negative_prompts,
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"save_precision": save_dtype,
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"mixed_precision": "fp16",
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"num_cpu_threads_per_process": 1,
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"pretrained_model_name_or_path": SDXL_models["checkpoint"],
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"save_model_as": "safetensors",
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"persistent_data_loader_workers": False,
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"max_data_loader_n_workers": 0,
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"seed": 42,
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"network_module": ".networks.lora",
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"dataset_config": dataset_toml,
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"output_name": f"{output_name}_rank{kwargs.get('network_dim')}_{save_dtype}",
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"loss_type": "l2",
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"alpha_mask": dataset["alpha_mask"],
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"network_train_unet_only": True if train_text_encoder == 'disabled' else False,
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"disable_mmap_load_safetensors": False,
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}
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attention_settings = {
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"sdpa": {"mem_eff_attn": True, "xformers": False, "spda": True},
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"xformers": {"mem_eff_attn": True, "xformers": True, "spda": False}
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}
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config_dict.update(attention_settings.get(attention_mode, {}))
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gradient_dtype_settings = {
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"fp16": {"full_fp16": True, "full_bf16": False, "mixed_precision": "fp16"},
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"bf16": {"full_bf16": True, "full_fp16": False, "mixed_precision": "bf16"}
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}
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config_dict.update(gradient_dtype_settings.get(gradient_dtype, {}))
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if train_text_encoder != 'disabled':
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config_dict["text_encoder_lr"] = [clip_l_lr, clip_g_lr]
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#network args
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additional_network_args = []
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# Handle network_args in args Namespace
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if hasattr(args, 'network_args') and isinstance(args.network_args, list):
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args.network_args.extend(additional_network_args)
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else:
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setattr(args, 'network_args', additional_network_args)
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if gradient_checkpointing == "disabled":
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config_dict["gradient_checkpointing"] = False
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elif gradient_checkpointing == "enabled_with_cpu_offloading":
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config_dict["gradient_checkpointing"] = True
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config_dict["cpu_offload_checkpointing"] = True
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else:
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config_dict["gradient_checkpointing"] = True
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if SDXL_models["lora_path"]:
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config_dict["network_weights"] = SDXL_models["lora_path"]
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config_dict.update(kwargs)
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config_dict.update(optimizer_settings)
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if loss_args:
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config_dict.update(loss_args)
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if resume_args:
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config_dict.update(resume_args)
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for key, value in config_dict.items():
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setattr(args, key, value)
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saved_args_file_path = os.path.join(output_dir, f"{output_name}_args.json")
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with open(saved_args_file_path, 'w') as f:
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json.dump(vars(args), f, indent=4)
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#workflow saving
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metadata = {}
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if extra_pnginfo is not None:
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metadata.update(extra_pnginfo["workflow"])
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saved_workflow_file_path = os.path.join(output_dir, f"{output_name}_workflow.json")
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with open(saved_workflow_file_path, 'w') as f:
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json.dump(metadata, f, indent=4)
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#pass args to kohya and initialize trainer
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with torch.inference_mode(False):
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network_trainer = SdxlNetworkTrainer()
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training_loop = network_trainer.init_train(args)
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epochs_count = network_trainer.num_train_epochs
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trainer = {
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"network_trainer": network_trainer,
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"training_loop": training_loop,
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}
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return (trainer, epochs_count, args)
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class SDXLTrainLoop:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": {
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"network_trainer": ("NETWORKTRAINER",),
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"steps": ("INT", {"default": 1, "min": 1, "max": 10000, "step": 1, "tooltip": "the step point in training to validate/save"}),
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},
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}
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RETURN_TYPES = ("NETWORKTRAINER", "INT",)
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RETURN_NAMES = ("network_trainer", "steps",)
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FUNCTION = "train"
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CATEGORY = "FluxTrainer/SDXL"
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def train(self, network_trainer, steps):
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with torch.inference_mode(False):
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training_loop = network_trainer["training_loop"]
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network_trainer = network_trainer["network_trainer"]
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initial_global_step = network_trainer.global_step
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target_global_step = network_trainer.global_step + steps
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comfy_pbar = comfy.utils.ProgressBar(steps)
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network_trainer.comfy_pbar = comfy_pbar
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network_trainer.optimizer_train_fn()
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while network_trainer.global_step < target_global_step:
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steps_done = training_loop(
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break_at_steps = target_global_step,
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epoch = network_trainer.current_epoch.value,
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)
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# Also break if the global steps have reached the max train steps
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if network_trainer.global_step >= network_trainer.args.max_train_steps:
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break
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trainer = {
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"network_trainer": network_trainer,
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"training_loop": training_loop,
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}
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return (trainer, network_trainer.global_step)
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class SDXLTrainLoRASave:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": {
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"network_trainer": ("NETWORKTRAINER",),
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"save_state": ("BOOLEAN", {"default": False, "tooltip": "save the whole model state as well"}),
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"copy_to_comfy_lora_folder": ("BOOLEAN", {"default": False, "tooltip": "copy the lora model to the comfy lora folder"}),
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},
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}
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RETURN_TYPES = ("NETWORKTRAINER", "STRING", "INT",)
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RETURN_NAMES = ("network_trainer","lora_path", "steps",)
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FUNCTION = "save"
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CATEGORY = "FluxTrainer/SDXL"
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def save(self, network_trainer, save_state, copy_to_comfy_lora_folder):
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import shutil
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with torch.inference_mode(False):
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trainer = network_trainer["network_trainer"]
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global_step = trainer.global_step
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ckpt_name = train_util.get_step_ckpt_name(trainer.args, "." + trainer.args.save_model_as, global_step)
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trainer.save_model(ckpt_name, trainer.accelerator.unwrap_model(trainer.network), global_step, trainer.current_epoch.value + 1)
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remove_step_no = train_util.get_remove_step_no(trainer.args, global_step)
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if remove_step_no is not None:
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remove_ckpt_name = train_util.get_step_ckpt_name(trainer.args, "." + trainer.args.save_model_as, remove_step_no)
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trainer.remove_model(remove_ckpt_name)
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if save_state:
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train_util.save_and_remove_state_stepwise(trainer.args, trainer.accelerator, global_step)
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lora_path = os.path.join(trainer.args.output_dir, ckpt_name)
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if copy_to_comfy_lora_folder:
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destination_dir = os.path.join(folder_paths.models_dir, "loras", "flux_trainer")
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os.makedirs(destination_dir, exist_ok=True)
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shutil.copy(lora_path, os.path.join(destination_dir, ckpt_name))
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return (network_trainer, lora_path, global_step)
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class SDXLTrainEnd:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": {
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"network_trainer": ("NETWORKTRAINER",),
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"save_state": ("BOOLEAN", {"default": True}),
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},
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}
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RETURN_TYPES = ("STRING", "STRING", "STRING",)
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RETURN_NAMES = ("lora_name", "metadata", "lora_path",)
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FUNCTION = "endtrain"
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CATEGORY = "FluxTrainer/SDXL"
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OUTPUT_NODE = True
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def endtrain(self, network_trainer, save_state):
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with torch.inference_mode(False):
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training_loop = network_trainer["training_loop"]
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network_trainer = network_trainer["network_trainer"]
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network_trainer.metadata["ss_epoch"] = str(network_trainer.num_train_epochs)
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network_trainer.metadata["ss_training_finished_at"] = str(time.time())
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network = network_trainer.accelerator.unwrap_model(network_trainer.network)
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network_trainer.accelerator.end_training()
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network_trainer.optimizer_eval_fn()
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if save_state:
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train_util.save_state_on_train_end(network_trainer.args, network_trainer.accelerator)
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ckpt_name = train_util.get_last_ckpt_name(network_trainer.args, "." + network_trainer.args.save_model_as)
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network_trainer.save_model(ckpt_name, network, network_trainer.global_step, network_trainer.num_train_epochs, force_sync_upload=True)
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logger.info("model saved.")
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final_lora_name = str(network_trainer.args.output_name)
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final_lora_path = os.path.join(network_trainer.args.output_dir, ckpt_name)
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# metadata
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metadata = json.dumps(network_trainer.metadata, indent=2)
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training_loop = None
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network_trainer = None
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mm.soft_empty_cache()
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return (final_lora_name, metadata, final_lora_path)
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class SDXLTrainValidationSettings:
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@classmethod
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def INPUT_TYPES(s):
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return {"required": {
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"steps": ("INT", {"default": 20, "min": 1, "max": 256, "step": 1, "tooltip": "sampling steps"}),
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"width": ("INT", {"default": 1024, "min": 64, "max": 4096, "step": 8, "tooltip": "image width"}),
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"height": ("INT", {"default": 1024, "min": 64, "max": 4096, "step": 8, "tooltip": "image height"}),
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"guidance_scale": ("FLOAT", {"default": 7.5, "min": 1.0, "max": 32.0, "step": 0.05, "tooltip": "guidance scale"}),
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||||
"sampler": (["ddim", "ddpm", "pndm", "lms", "euler", "euler_a", "dpmsolver", "dpmsingle", "heun", "dpm_2", "dpm_2_a",], {"default": "dpm_2", "tooltip": "sampler"}),
|
||||
"seed": ("INT", {"default": 42,"min": 0, "max": 0xffffffffffffffff, "step": 1}),
|
||||
},
|
||||
}
|
||||
|
||||
RETURN_TYPES = ("VALSETTINGS", )
|
||||
RETURN_NAMES = ("validation_settings", )
|
||||
FUNCTION = "set"
|
||||
CATEGORY = "FluxTrainer/SDXL"
|
||||
|
||||
def set(self, **kwargs):
|
||||
validation_settings = kwargs
|
||||
print(validation_settings)
|
||||
|
||||
return (validation_settings,)
|
||||
|
||||
class SDXLTrainValidate:
|
||||
@classmethod
|
||||
def INPUT_TYPES(s):
|
||||
return {
|
||||
"required": {
|
||||
"network_trainer": ("NETWORKTRAINER",),
|
||||
},
|
||||
"optional": {
|
||||
"validation_settings": ("VALSETTINGS",),
|
||||
}
|
||||
}
|
||||
|
||||
RETURN_TYPES = ("NETWORKTRAINER", "IMAGE",)
|
||||
RETURN_NAMES = ("network_trainer", "validation_images",)
|
||||
FUNCTION = "validate"
|
||||
CATEGORY = "FluxTrainer/SDXL"
|
||||
|
||||
def validate(self, network_trainer, validation_settings=None):
|
||||
training_loop = network_trainer["training_loop"]
|
||||
network_trainer = network_trainer["network_trainer"]
|
||||
|
||||
params = (
|
||||
network_trainer.accelerator,
|
||||
network_trainer.args,
|
||||
network_trainer.current_epoch.value,
|
||||
network_trainer.global_step,
|
||||
network_trainer.accelerator.device,
|
||||
network_trainer.vae,
|
||||
network_trainer.tokenizers,
|
||||
network_trainer.text_encoder,
|
||||
network_trainer.unet,
|
||||
validation_settings,
|
||||
)
|
||||
network_trainer.optimizer_eval_fn()
|
||||
with torch.inference_mode(False):
|
||||
image_tensors = network_trainer.sample_images(*params)
|
||||
|
||||
|
||||
trainer = {
|
||||
"network_trainer": network_trainer,
|
||||
"training_loop": training_loop,
|
||||
}
|
||||
return (trainer, (0.5 * (image_tensors + 1.0)).cpu().float(),)
|
||||
|
||||
NODE_CLASS_MAPPINGS = {
|
||||
"SDXLModelSelect": SDXLModelSelect,
|
||||
"InitSDXLLoRATraining": InitSDXLLoRATraining,
|
||||
"SDXLTrainValidationSettings": SDXLTrainValidationSettings,
|
||||
"SDXLTrainValidate": SDXLTrainValidate,
|
||||
|
||||
}
|
||||
NODE_DISPLAY_NAME_MAPPINGS = {
|
||||
"SDXLModelSelect": "SDXL Model Select",
|
||||
"InitSDXLLoRATraining": "Init SDXL LoRA Training",
|
||||
"SDXLTrainValidationSettings": "SDXL Train Validation Settings",
|
||||
"SDXLTrainValidate": "SDXL Train Validate",
|
||||
}
|
||||
Reference in New Issue
Block a user