525 lines
24 KiB
Python
Executable File
525 lines
24 KiB
Python
Executable File
import fnmatch
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import math
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import os
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import time
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import shutil
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import gc
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import numpy as np
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import argparse
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import itertools
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import zipfile
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import torch
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import torch.utils.checkpoint
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from tqdm import tqdm
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import prodigyopt
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from typing import Union, Iterable, List, Dict, Tuple, Optional, cast
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#from diffusers.training_utils import cast_training_params
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from trainer.utils.utils import *
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from trainer.checkpoint import save_checkpoint
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from trainer.embedding_handler import TokenEmbeddingsHandler
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from trainer.dataset import PreprocessedDataset
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from trainer.config import TrainingConfig
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from trainer.models import print_trainable_parameters, load_models
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from trainer.loss import compute_diffusion_loss, compute_grad_norm, ConditioningRegularizer
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from trainer.inference import render_images, get_conditioning_signals
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from trainer.preprocess import preprocess
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from trainer.utils.io import make_validation_img_grid
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from trainer.optimizer import (
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OptimizerCollection,
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get_optimizer_and_peft_models_text_encoder_lora,
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get_textual_inversion_optimizer,
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get_unet_lora_parameters,
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get_unet_optimizer
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)
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def train(
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config: TrainingConfig,
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):
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seed_everything(config.seed)
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config, input_dir = preprocess(
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config,
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working_directory=config.output_dir,
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concept_mode=config.concept_mode,
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input_zip_path=config.lora_training_urls,
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caption_text=config.caption_prefix,
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mask_target_prompts=config.mask_target_prompts,
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target_size=config.resolution,
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crop_based_on_salience=config.crop_based_on_salience,
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use_face_detection_instead=config.use_face_detection_instead,
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left_right_flip_augmentation=config.left_right_flip_augmentation,
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augment_imgs_up_to_n = config.augment_imgs_up_to_n,
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caption_model = config.caption_model,
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seed = config.seed,
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)
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if config.allow_tf32:
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torch.backends.cuda.matmul.allow_tf32 = True
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weight_dtype = dtype_map[config.weight_type]
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(
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pipe,
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tokenizer_one,
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tokenizer_two,
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noise_scheduler,
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text_encoder_one,
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text_encoder_two,
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vae,
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unet,
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) = load_models(config.pretrained_model, config.device, weight_dtype, keep_vae_float32=0)
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# Initialize new tokens for training.
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embedding_handler = TokenEmbeddingsHandler(
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text_encoders = [text_encoder_one, text_encoder_two],
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tokenizers = [tokenizer_one, tokenizer_two]
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)
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embedding_handler.initialize_new_tokens(
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inserting_toks=config.inserting_list_tokens,
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starting_toks=None,
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seed=config.seed
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)
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# Experimental TODO: warmup the token embeddings using CLIP-similarity optimization
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embedding_handler.make_embeddings_trainable()
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embedding_handler.token_regularizer = ConditioningRegularizer(config, embedding_handler)
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embedding_handler.pre_optimize_token_embeddings(config, pipe)
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# Turn off all gradients for now:
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unet.requires_grad_(False)
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vae.requires_grad_(False)
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text_encoders = embedding_handler.text_encoders
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for txt_encoder in text_encoders:
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if txt_encoder is not None:
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txt_encoder.requires_grad_(False)
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if config.text_encoder_lora_optimizer is not None:
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print("Creating LoRA for text encoder...")
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optimizer_text_encoder_lora , text_encoder_peft_models = get_optimizer_and_peft_models_text_encoder_lora(
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text_encoders=text_encoders,
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lora_rank = config.text_encoder_lora_rank,
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lora_alpha_multiplier = config.lora_alpha_multiplier,
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use_dora = config.use_dora,
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optimizer_name = config.text_encoder_lora_optimizer,
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lora_lr = config.text_encoder_lora_lr,
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weight_decay = config.text_encoder_lora_weight_decay
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)
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else:
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optimizer_text_encoder_lora = None
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text_encoder_peft_models = [None] * len(text_encoders)
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embedding_handler.make_embeddings_trainable()
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optimizer_ti, textual_inversion_params = get_textual_inversion_optimizer(
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text_encoders=text_encoders,
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textual_inversion_lr=config.ti_lr,
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textual_inversion_weight_decay=config.ti_weight_decay,
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optimizer_name=config.ti_optimizer ## hardcoded
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)
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if not config.is_lora: # This code pathway has not been tested in a long while
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print(f"Doing full fine-tuning on the U-Net")
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unet.requires_grad_(True)
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unet_lora_parameters = None
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unet_trainable_params = unet.parameters()
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else:
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# Do lora-training instead.
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# https://huggingface.co/docs/peft/main/en/developer_guides/lora#rank-stabilized-lora
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# target_blocks=["block"] for original IP-Adapter
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# target_blocks=["up_blocks.0.attentions.1"] for style blocks only
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# target_blocks = ["up_blocks.0.attentions.1", "down_blocks.2.attentions.1"] # for style+layout blocks
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unet, unet_trainable_params, unet_lora_parameters = get_unet_lora_parameters(
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lora_rank = config.lora_rank,
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lora_alpha_multiplier = config.lora_alpha_multiplier,
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lora_weight_decay=config.lora_weight_decay,
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use_dora = config.use_dora,
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unet=unet,
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pipe=pipe
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)
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optimizer_unet = get_unet_optimizer(
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prodigy_d_coef=config.prodigy_d_coef,
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prodigy_growth_factor=config.unet_prodigy_growth_factor,
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lora_weight_decay=config.lora_weight_decay,
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use_dora=config.use_dora,
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unet_trainable_params=unet_trainable_params,
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optimizer_name=config.unet_optimizer_type
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)
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print_trainable_parameters(unet, model_name = 'unet')
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for i, text_encoder in enumerate(text_encoders):
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if text_encoder is not None:
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print_trainable_parameters(text_encoder, model_name = f'text_encoder_{i}')
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train_dataset = PreprocessedDataset(
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input_dir,
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pipe,
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vae.float(),
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size = config.train_img_size,
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do_cache=config.do_cache,
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substitute_caption_map=config.token_dict,
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aspect_ratio_bucketing=config.aspect_ratio_bucketing,
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train_batch_size=config.train_batch_size
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)
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# offload the vae to cpu:
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vae = vae.to('cpu')
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gc.collect()
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torch.cuda.empty_cache()
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print(f"# PTI : Loaded dataset, do_cache: {config.do_cache}")
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train_dataloader = torch.utils.data.DataLoader(
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train_dataset,
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batch_size=config.train_batch_size,
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shuffle=True,
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num_workers=config.dataloader_num_workers,
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)
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num_update_steps_per_epoch = math.ceil(len(train_dataloader) / config.gradient_accumulation_steps)
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num_update_steps_per_epoch = math.ceil(len(train_dataloader))
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if config.max_train_steps is None:
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config.max_train_steps = config.num_train_epochs * num_update_steps_per_epoch
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config.num_train_epochs = math.ceil(config.max_train_steps / num_update_steps_per_epoch)
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total_batch_size = config.train_batch_size * config.gradient_accumulation_steps
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print(f"--- Num samples = {len(train_dataset)}")
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print(f"--- Num batches each epoch = {len(train_dataloader)}")
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print(f"--- Num Epochs = {config.num_train_epochs}")
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print(f"--- Instantaneous batch size per device = {config.train_batch_size}")
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print(f"--- Total batch_size (distributed + accumulation) = {total_batch_size}")
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print(f"--- Gradient Accumulation steps = {config.gradient_accumulation_steps}")
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print(f"--- Total optimization steps = {config.max_train_steps}\n")
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global_step = 0
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last_save_step = 0
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progress_bar = tqdm(range(global_step, config.max_train_steps), position=0, leave=True)
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checkpoint_dir = os.path.join(str(config.output_dir), "checkpoints")
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if os.path.exists(checkpoint_dir):
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shutil.rmtree(checkpoint_dir)
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os.makedirs(f"{checkpoint_dir}")
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# Data tracking inits:
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start_time, images_done = time.time(), 0
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prompt_embeds_norms = {'main':[], 'reg':[]}
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losses = {'img_loss': [], 'tot_loss': [], 'covariance_tok_reg_loss': [], 'concept_description_loss': [], 'token_std_loss': []}
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grad_norms, token_stds = {'unet': []}, {}
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for i in range(len(text_encoders)):
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grad_norms[f'text_encoder_{i}'] = []
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token_stds[f'text_encoder_{i}'] = {j: [] for j in range(config.n_tokens)}
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# default value of cold (pre-warmup) optimizer lr:
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base_lr = 0.5e-5
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#######################################################################################################
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"""
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Storing all optimizers in a single container
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"""
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optimizer_collection = OptimizerCollection(
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optimizer_textual_inversion=optimizer_ti,
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optimizer_text_encoders=optimizer_text_encoder_lora,
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optimizer_unet=optimizer_unet,
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debug = config.debug
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)
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optimizers = optimizer_collection.optimizers
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embedding_handler.visualize_random_token_embeddings(os.path.join(config.output_dir, 'ti_embeddings'), n = 10)
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for epoch in range(config.num_train_epochs):
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if config.aspect_ratio_bucketing:
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train_dataset.bucket_manager.start_epoch()
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progress_bar.set_description(f"# PTI :step: {global_step}, epoch: {epoch}")
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for step, batch in enumerate(train_dataloader):
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progress_bar.update(1)
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finegrained_epoch = epoch + step / len(train_dataloader)
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completion_f = finegrained_epoch / config.num_train_epochs
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# param_groups[1] goes from ti_lr to 0.0 over the course of training
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if config.ti_optimizer != "prodigy": # Update ti_learning rate gradually:
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if optimizers['textual_inversion'] is not None:
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optimizers['textual_inversion'].param_groups[0]['lr'] = config.ti_lr * (1 - completion_f) ** 2.0
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# warmup the ti-lr:
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if config.ti_lr_warmup_steps > 0:
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warmup_f = min(global_step / config.ti_lr_warmup_steps, 1.0)
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optimizers['textual_inversion'].param_groups[0]['lr'] *= warmup_f
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if config.freeze_ti_after_completion_f <= completion_f:
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optimizers['textual_inversion'].param_groups[0]['lr'] *= 0
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if optimizers['text_encoders'] is not None:
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optimizers['text_encoders'].param_groups[0]['lr'] = config.text_encoder_lora_lr * (1 - completion_f) ** 2.0
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# warmup the txt-encoder lr:
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if config.txt_encoders_lr_warmup_steps > 0 and optimizers['text_encoders'] is not None:
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warmup_f = min(global_step / config.txt_encoders_lr_warmup_steps, 1.0)
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optimizers['text_encoders'].param_groups[0]['lr'] *= warmup_f
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if optimizers['unet'] is not None:
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# Calculate the exponential factor
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exp_factor = (config.unet_lr / base_lr) ** (global_step / config.unet_lr_warmup_steps)
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# Apply the exponential learning rate
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optimizers['unet'].param_groups[0]['lr'] = base_lr * exp_factor
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if not config.aspect_ratio_bucketing:
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captions, vae_latent, mask = batch
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else:
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captions, vae_latent, mask = train_dataset.get_aspect_ratio_bucketed_batch()
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captions = list(captions)
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#vae_latent = vae_latent.to(pipe.device).to(weight_dtype)
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#mask = mask.to(pipe.device).to(weight_dtype)
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prompt_embeds, pooled_prompt_embeds, add_time_ids = get_conditioning_signals(
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config, pipe, captions
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)
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# Sample noise that we'll add to the latents:
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vae_latent = vae_latent.to(weight_dtype)
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noise = torch.randn_like(vae_latent)
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if config.noise_offset > 0.0:
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# https://www.crosslabs.org//blog/diffusion-with-offset-noise
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noise += config.noise_offset * torch.randn(
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(noise.shape[0], noise.shape[1], 1, 1), device=noise.device)
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timesteps = torch.randint(
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0,
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noise_scheduler.config.num_train_timesteps,
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(vae_latent.shape[0],),
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device=vae_latent.device,
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).long()
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noisy_latent = noise_scheduler.add_noise(vae_latent, noise, timesteps)
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# Predict the noise residual
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model_pred = unet(
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noisy_latent,
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timesteps,
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encoder_hidden_states=prompt_embeds,
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timestep_cond=None,
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added_cond_kwargs={"text_embeds": pooled_prompt_embeds, "time_ids": add_time_ids},
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return_dict=False,
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)[0]
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# Compute the loss:
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loss = compute_diffusion_loss(config, model_pred, noise, noisy_latent, mask, noise_scheduler, timesteps)
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losses['img_loss'].append(loss.item())
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if config.training_attributes["gpt_description"] and config.debug:
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concept_description_loss = embedding_handler.compute_target_prompt_loss(config.training_attributes["gpt_description"], prompt_embeds, pooled_prompt_embeds, config, pipe)
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# Dont apply this loss, just plot it for now:
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loss += 0.0 * concept_description_loss
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losses['concept_description_loss'].append(concept_description_loss.item())
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if config.l1_penalty > 0.0:
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# Compute normalized L1 norm (mean of abs sum) of all lora parameters:
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l1_norm = sum(p.abs().sum() for p in unet_lora_parameters) / sum(p.numel() for p in unet_lora_parameters)
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loss += config.l1_penalty * l1_norm
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if optimizers['textual_inversion'] is not None and optimizers['textual_inversion'].param_groups[0]['lr'] > 0.0:
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loss, losses, prompt_embeds_norms = embedding_handler.token_regularizer.apply_regularization(loss, losses, prompt_embeds_norms, prompt_embeds, pipe = pipe)
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losses['tot_loss'].append(loss.item())
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loss = loss / config.gradient_accumulation_steps
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loss.backward()
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last_batch = (step + 1 == len(train_dataloader))
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if (step + 1) % config.gradient_accumulation_steps == 0 or last_batch:
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if optimizers['textual_inversion'] is not None:
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# zero out the gradients of the non-trained text-encoder embeddings
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for i, embedding_tensor in enumerate(textual_inversion_params):
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embedding_tensor.grad.data[:-config.n_tokens, : ] *= 0.
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if config.debug:
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# Track the average gradient norms:
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grad_norms['unet'].append(compute_grad_norm(itertools.chain(unet.parameters())).item())
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for i, text_encoder in enumerate(text_encoders):
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if text_encoder is not None:
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text_encoder_norm = compute_grad_norm(itertools.chain(text_encoder.parameters())).item()
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grad_norms[f'text_encoder_{i}'].append(text_encoder_norm)
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optimizer_collection.step()
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# after every optimizer step, we do some manual intervention of the embeddings to regularize them:
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if optimizer_collection.get_lr('textual_inversion') > 0.0:
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#embedding_handler.fix_embedding_std(config.off_ratio_power)
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pass
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optimizer_collection.zero_grad()
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#############################################################################################################
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if config.debug:
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# Track the token embedding stds:
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trainable_embeddings, _ = embedding_handler.get_trainable_embeddings()
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for idx in range(len(text_encoders)):
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if text_encoders[idx] is not None:
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embedding_stds = trainable_embeddings[f'txt_encoder_{idx}'].detach().float().std(dim=1)
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for std_i, std in enumerate(embedding_stds):
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token_stds[f'text_encoder_{idx}'][std_i].append(embedding_stds[std_i].item())
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# Print some statistics:
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if config.debug and (global_step % config.checkpointing_steps == 0) and global_step > 0:
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output_save_dir = f"{checkpoint_dir}/checkpoint-{global_step}"
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os.makedirs(output_save_dir, exist_ok=True)
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config.save_as_json(
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os.path.join(output_save_dir, "training_args.json")
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)
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save_checkpoint(
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output_dir=output_save_dir,
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global_step=global_step,
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unet=unet,
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embedding_handler=embedding_handler,
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token_dict=config.token_dict,
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is_lora=config.is_lora,
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unet_lora_parameters=unet_lora_parameters,
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name=config.name,
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text_encoder_peft_models=text_encoder_peft_models,
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pretrained_model_version=config.pretrained_model["version"]
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)
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last_save_step = global_step
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token_embeddings, trainable_tokens = embedding_handler.get_trainable_embeddings()
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for idx, text_encoder in enumerate(text_encoders):
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if text_encoder is None:
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continue
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n = len(token_embeddings[f'txt_encoder_{idx}'])
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for i in range(n):
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token = trainable_tokens[f'txt_encoder_{idx}'][i]
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# Strip any backslashes from the token name:
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token = token.replace("/", "_")
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embedding = token_embeddings[f'txt_encoder_{idx}'][i]
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plot_torch_hist(embedding, global_step, os.path.join(config.output_dir, 'ti_embeddings') , f"enc_{idx}_tokid_{i}: {token}", min_val=-0.05, max_val=0.05, ymax_f = 0.05, color = 'red')
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embedding_handler.print_token_info()
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plot_torch_hist(unet_lora_parameters if config.is_lora else unet.parameters(), global_step, config.output_dir, "lora_weights", min_val=-0.4, max_val=0.4, ymax_f = 0.08)
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plot_loss(losses, save_path=f'{config.output_dir}/losses.png')
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target_std_dict = {f"text_encoder_{idx}_target": embedding_handler.embeddings_settings[f"std_token_embedding_{idx}"].item() for idx in range(len(text_encoders)) if text_encoders[idx] is not None}
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plot_token_stds(token_stds, save_path=f'{config.output_dir}/token_stds.png', target_value_dict=target_std_dict)
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plot_grad_norms(grad_norms, save_path=f'{config.output_dir}/grad_norms.png')
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plot_lrs(optimizer_collection.learning_rate_tracker, save_path=f'{config.output_dir}/learning_rates.png')
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plot_curve(prompt_embeds_norms, 'steps', 'norm', 'prompt_embed norms', save_path=f'{config.output_dir}/prompt_embeds_norms.png')
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validation_prompts = render_images(
|
|
pipe=pipe,
|
|
render_size=config.validation_img_size,
|
|
lora_path= output_save_dir,
|
|
train_step= global_step,
|
|
seed= config.seed,
|
|
is_lora= config.is_lora,
|
|
pretrained_model= config.pretrained_model,
|
|
lora_scale= config.sample_imgs_lora_scale,
|
|
n_imgs = config.n_sample_imgs,
|
|
device = config.device,
|
|
checkpoint_folder=None
|
|
)
|
|
img_grid_path = make_validation_img_grid(output_save_dir)
|
|
shutil.copy(img_grid_path, os.path.join(os.path.dirname(output_save_dir), f"validation_grid_{global_step:04d}.jpg"))
|
|
|
|
gc.collect()
|
|
torch.cuda.empty_cache()
|
|
|
|
images_done += config.train_batch_size
|
|
global_step += 1
|
|
|
|
if global_step % 100 == 0:
|
|
print(f" ---- avg training fps: {images_done / (time.time() - start_time):.2f}", end="\r")
|
|
|
|
if global_step % (config.max_train_steps//20) == 0:
|
|
progress = (global_step / config.max_train_steps) + 0.05
|
|
yield np.min((progress, 1.0))
|
|
|
|
# final_save
|
|
if (global_step - last_save_step) > 51:
|
|
output_save_dir = f"{checkpoint_dir}/checkpoint-{global_step}"
|
|
else:
|
|
output_save_dir = f"{checkpoint_dir}/checkpoint-{last_save_step}"
|
|
|
|
if config.debug:
|
|
plot_loss(losses, save_path=f'{config.output_dir}/losses.png')
|
|
target_std_dict = {f"text_encoder_{idx}_target": embedding_handler.embeddings_settings[f"std_token_embedding_{idx}"].item() for idx in range(len(text_encoders)) if text_encoders[idx] is not None}
|
|
plot_token_stds(token_stds, save_path=f'{config.output_dir}/token_stds.png', target_value_dict=target_std_dict)
|
|
plot_lrs(optimizer_collection.learning_rate_tracker, save_path=f'{config.output_dir}/learning_rates.png')
|
|
plot_torch_hist(unet_lora_parameters if config.is_lora else unet.parameters(), global_step, config.output_dir, "lora_weights", min_val=-0.4, max_val=0.4, ymax_f = 0.08)
|
|
|
|
if not os.path.exists(output_save_dir):
|
|
os.makedirs(output_save_dir, exist_ok=True)
|
|
config.save_as_json(os.path.join(output_save_dir, "training_args.json"))
|
|
save_checkpoint(
|
|
output_dir=output_save_dir,
|
|
global_step=global_step,
|
|
unet=unet,
|
|
embedding_handler=embedding_handler,
|
|
token_dict=config.token_dict,
|
|
is_lora=config.is_lora,
|
|
unet_lora_parameters=unet_lora_parameters,
|
|
name=config.name,
|
|
pretrained_model_version=config.pretrained_model["version"]
|
|
)
|
|
|
|
del unet
|
|
del vae
|
|
del text_encoder_one
|
|
del text_encoder_two
|
|
del tokenizer_one
|
|
del tokenizer_two
|
|
del embedding_handler
|
|
del pipe
|
|
del train_dataloader
|
|
del train_dataset
|
|
gc.collect()
|
|
torch.cuda.empty_cache()
|
|
|
|
# pipe is None because we want to load from disk
|
|
validation_prompts = render_images(
|
|
pipe = None,
|
|
render_size=config.validation_img_size,
|
|
lora_path=output_save_dir,
|
|
train_step=global_step,
|
|
seed=config.seed,
|
|
is_lora=config.is_lora,
|
|
pretrained_model=config.pretrained_model,
|
|
lora_scale=config.sample_imgs_lora_scale,
|
|
n_imgs = config.n_sample_imgs,
|
|
n_steps = 30,
|
|
device = config.device,
|
|
checkpoint_folder=output_save_dir
|
|
)
|
|
img_grid_path = make_validation_img_grid(output_save_dir)
|
|
shutil.copy(img_grid_path, os.path.join(os.path.dirname(output_save_dir), f"validation_grid_{global_step:04d}.jpg"))
|
|
|
|
else:
|
|
print(f"Skipping final save, {output_save_dir} already exists")
|
|
|
|
if config.debug:
|
|
# Create a zipfile of all the *.py files in the directory
|
|
parent_dir = os.path.dirname(os.path.abspath(__file__))
|
|
zip_file_path = os.path.join(config.output_dir, 'source_code.zip')
|
|
with zipfile.ZipFile(zip_file_path, 'w', zipfile.ZIP_DEFLATED) as zipf:
|
|
zipdir(parent_dir, zipf)
|
|
|
|
config.job_time = time.time() - config.start_time
|
|
config.training_attributes["validation_prompts"] = validation_prompts
|
|
config.save_as_json(os.path.join(output_save_dir, "training_args.json"))
|
|
|
|
return config, output_save_dir
|
|
|
|
|
|
if __name__ == "__main__":
|
|
parser = argparse.ArgumentParser(description='Train a concept')
|
|
parser.add_argument('config_filename', type=str, help='Input JSON configuration file')
|
|
args = parser.parse_args()
|
|
|
|
config = TrainingConfig.from_json(file_path=args.config_filename)
|
|
for progress in train(config=config):
|
|
print(f"Progress: {(100*progress):.2f}%", end="\r")
|
|
|
|
print("Training done :)") |