import os import sys import types from pathlib import Path current_file_path = Path(__file__).resolve() sys.path.insert(0, str(current_file_path.parent.parent)) import argparse import datetime import time import warnings warnings.filterwarnings("ignore") # ignore warning from mmcv.runner import LogBuffer from copy import deepcopy from diffusion.utils.checkpoint import save_checkpoint, load_checkpoint import torch import torch.nn as nn from accelerate import Accelerator, InitProcessGroupKwargs from accelerate.utils import DistributedType from torch.utils.data import RandomSampler from diffusion import IDDPM from diffusion.utils.dist_utils import synchronize, get_world_size, clip_grad_norm_ from diffusion.data.builder import build_dataset, build_dataloader, set_data_root from diffusion.model.builder import build_model from diffusion.utils.logger import get_root_logger from diffusion.utils.misc import set_random_seed, read_config, init_random_seed, DebugUnderflowOverflow from diffusion.utils.optimizer import build_optimizer, auto_scale_lr from diffusion.utils.lr_scheduler import build_lr_scheduler from diffusion.model.t5 import T5Embedder from diffusion.utils.data_sampler import AspectRatioBatchSampler def set_fsdp_env(): os.environ["ACCELERATE_USE_FSDP"] = 'true' os.environ["FSDP_AUTO_WRAP_POLICY"] = 'TRANSFORMER_BASED_WRAP' os.environ["FSDP_BACKWARD_PREFETCH"] = 'BACKWARD_PRE' os.environ["FSDP_TRANSFORMER_CLS_TO_WRAP"] = 'PixArtBlock' def ema_update(model_dest: nn.Module, model_src: nn.Module, rate): param_dict_src = dict(model_src.named_parameters()) for p_name, p_dest in model_dest.named_parameters(): p_src = param_dict_src[p_name] assert p_src is not p_dest p_dest.data.mul_(rate).add_((1 - rate) * p_src.data) def train(): if config.get('debug_nan', False): DebugUnderflowOverflow(model) logger.info('NaN debugger registered. Start to detect overflow during training.') time_start, last_tic = time.time(), time.time() log_buffer = LogBuffer() start_step = start_epoch * len(train_dataloader) global_step = 0 total_steps = len(train_dataloader) * config.num_epochs # txt related prompt = config.data.prompt if isinstance(config.data.prompt, list) else [config.data.prompt] llm_embed_model = T5Embedder(device="cpu", local_cache=True, cache_dir='output/pretrained_models/t5_ckpts', torch_dtype=torch.float) prompt_embs, attention_mask = llm_embed_model.get_text_embeddings(prompt) prompt_embs, attention_mask = prompt_embs[None].cuda(), attention_mask[None].cuda() del llm_embed_model # Now you train the model for epoch in range(start_epoch + 1, config.num_epochs + 1): data_time_start= time.time() data_time_all = 0 for step, batch in enumerate(train_dataloader): data_time_all += time.time() - data_time_start z = batch[0] clean_images = z * config.scale_factor y = prompt_embs y_mask = attention_mask data_info = batch[1] # Sample a random timestep for each image bs = clean_images.shape[0] timesteps = torch.randint(0, config.train_sampling_steps, (bs,), device=clean_images.device).long() grad_norm = None with accelerator.accumulate(model): # Predict the noise residual optimizer.zero_grad() loss_term = train_diffusion.training_losses(model, clean_images, timesteps, model_kwargs=dict(y=y, mask=y_mask, data_info=data_info)) loss = loss_term['loss'].mean() accelerator.backward(loss) if accelerator.sync_gradients: grad_norm = accelerator.clip_grad_norm_(model.parameters(), config.gradient_clip) optimizer.step() lr_scheduler.step() if accelerator.sync_gradients: ema_update(model_ema, model, config.ema_rate) lr = lr_scheduler.get_last_lr()[0] logs = {"loss": accelerator.gather(loss).mean().item()} if grad_norm is not None: logs.update(grad_norm=accelerator.gather(grad_norm).mean().item()) log_buffer.update(logs) if (step + 1) % config.log_interval == 0: t = (time.time() - last_tic) / config.log_interval t_d = data_time_all / config.log_interval avg_time = (time.time() - time_start) / (global_step + 1) eta = str(datetime.timedelta(seconds=int(avg_time * (total_steps - start_step - global_step - 1)))) eta_epoch = str(datetime.timedelta(seconds=int(avg_time * (len(train_dataloader) - step - 1)))) # avg_loss = sum(loss_buffer) / len(loss_buffer) log_buffer.average() info = f"Steps [{(epoch-1)*len(train_dataloader)+step+1}][{step + 1}/{len(train_dataloader)}]:total_eta: {eta}, " \ f"epoch_eta:{eta_epoch}, time_all:{t:.3f}, time_data:{t_d:.3f}, lr:{lr:.3e}, s:({model.module.h}, {model.module.w}), " info += ', '.join([f"{k}:{v:.4f}" for k, v in log_buffer.output.items()]) logger.info(info) last_tic = time.time() log_buffer.clear() data_time_all = 0 logs.update(lr=lr) accelerator.log(logs, step=global_step + start_step) global_step += 1 data_time_start= time.time() synchronize() if accelerator.is_main_process: if ((epoch - 1) * len(train_dataloader) + step + 1) % config.save_model_steps == 0: os.umask(0o000) save_checkpoint(os.path.join(config.work_dir, 'checkpoints'), epoch=epoch, step=(epoch - 1) * len(train_dataloader) + step + 1, model=accelerator.unwrap_model(model), model_ema=accelerator.unwrap_model(model_ema), optimizer=optimizer, lr_scheduler=lr_scheduler ) synchronize() synchronize() if accelerator.is_main_process: if epoch % config.save_model_epochs == 0 or epoch == config.num_epochs: os.umask(0o000) save_checkpoint(os.path.join(config.work_dir, 'checkpoints'), epoch=epoch, step=(epoch - 1) * len(train_dataloader) + step + 1, model=accelerator.unwrap_model(model), model_ema=accelerator.unwrap_model(model_ema), optimizer=optimizer, lr_scheduler=lr_scheduler ) synchronize() def parse_args(): parser = argparse.ArgumentParser(description="Process some integers.") parser.add_argument("config", type=str, help="config") parser.add_argument('--work-dir', help='the dir to save logs and models') parser.add_argument('--resume-from', help='the dir to resume the training') parser.add_argument('--load-from', default=None, help='the dir to load a ckpt for training') parser.add_argument('--local-rank', type=int, default=-1) parser.add_argument('--local_rank', type=int, default=-1) parser.add_argument('--debug', action='store_true') parser.add_argument('--save_step', type=int, default=100) parser.add_argument('--lr', type=float, default=5e-6) parser.add_argument('--train_class', type=str) parser.add_argument('--prompt', type=str, default='a photo of sks dog') args = parser.parse_args() return args if __name__ == '__main__': args = parse_args() config = read_config(args.config) if args.work_dir is not None: # update configs according to CLI args if args.work_dir is not None config.work_dir = args.work_dir if args.resume_from is not None: config.resume_from = dict( checkpoint=args.resume_from, load_ema=False, resume_optimizer=True, resume_lr_scheduler=True) if args.debug: config.log_interval = 1 config.train_batch_size = 1 config.save_model_steps=args.save_step config.data.update({'prompt': [args.prompt], 'root': args.train_class}) config.optimizer.update({'lr': args.lr}) os.umask(0o000) os.makedirs(config.work_dir, exist_ok=True) init_handler = InitProcessGroupKwargs() init_handler.timeout = datetime.timedelta(seconds=5400) # change timeout to avoid a strange NCCL bug # Initialize accelerator and tensorboard logging if config.use_fsdp: init_train = 'FSDP' from accelerate import FullyShardedDataParallelPlugin from torch.distributed.fsdp.fully_sharded_data_parallel import FullStateDictConfig set_fsdp_env() fsdp_plugin = FullyShardedDataParallelPlugin(state_dict_config=FullStateDictConfig(offload_to_cpu=False, rank0_only=False),) else: init_train = 'DDP' fsdp_plugin = None even_batches = True if config.multi_scale: even_batches=False, accelerator = Accelerator( mixed_precision=config.mixed_precision, gradient_accumulation_steps=config.gradient_accumulation_steps, log_with="tensorboard", project_dir=os.path.join(config.work_dir, "logs"), fsdp_plugin=fsdp_plugin, even_batches=even_batches, kwargs_handlers=[init_handler] ) logger = get_root_logger(os.path.join(config.work_dir, 'train_log.log')) config.seed = init_random_seed(config.get('seed', None)) set_random_seed(config.seed) if accelerator.is_main_process: config.dump(os.path.join(config.work_dir, 'config.py')) logger.info(f"Config: \n{config.pretty_text}") logger.info(f"World_size: {get_world_size()}, seed: {config.seed}") logger.info(f"Initializing: {init_train} for training") image_size = config.image_size # @param [256, 512] latent_size = int(image_size) // 8 pred_sigma = getattr(config, 'pred_sigma', True) learn_sigma = getattr(config, 'learn_sigma', True) and pred_sigma model_kwargs={"window_block_indexes": config.window_block_indexes, "window_size": config.window_size, "use_rel_pos": config.use_rel_pos, "lewei_scale": config.lewei_scale, 'config':config, 'model_max_length': config.model_max_length} # build models train_diffusion = IDDPM(str(config.train_sampling_steps)) eval_diffusion = IDDPM(str(config.eval_sampling_steps)) model = build_model(config.model, config.grad_checkpointing, config.get('fp32_attention', False), input_size=latent_size, learn_sigma=learn_sigma, pred_sigma=pred_sigma, **model_kwargs).train() logger.info(f"{config.model} Model Parameters: {sum(p.numel() for p in model.parameters()):,}") model_ema = deepcopy(model).eval() if config.load_from is not None: if args.load_from is not None: config.load_from = args.load_from missing, unexpected = load_checkpoint(config.load_from, model, load_ema=config.get('load_ema', False)) # model.reparametrize() if accelerator.is_main_process: print('Warning Missing keys: ', missing) print('Warning Unexpected keys', unexpected) ema_update(model_ema, model, 0.) # prepare for FSDP clip grad norm calculation if accelerator.distributed_type == DistributedType.FSDP: for m in accelerator._models: m.clip_grad_norm_ = types.MethodType(clip_grad_norm_, m) # build dataloader logger.warning(f"Training prompt: {config.data['prompt']}, Training data class: {config.data['root']}") set_data_root(config.data_root) dataset = build_dataset(config.data, resolution=image_size, aspect_ratio_type=config.aspect_ratio_type) if config.multi_scale: batch_sampler = AspectRatioBatchSampler(sampler=RandomSampler(dataset), dataset=dataset, batch_size=config.train_batch_size, aspect_ratios=dataset.aspect_ratio, drop_last=True, ratio_nums=dataset.ratio_nums, config=config, valid_num=1) # batch_sampler = BalancedAspectRatioBatchSampler(sampler=RandomSampler(dataset), dataset=dataset, # batch_size=config.train_batch_size, aspect_ratios=dataset.aspect_ratio, # ratio_nums=dataset.ratio_nums) train_dataloader = build_dataloader(dataset, batch_sampler=batch_sampler, num_workers=config.num_workers) else: train_dataloader = build_dataloader(dataset, num_workers=config.num_workers, batch_size=config.train_batch_size, shuffle=True) # build optimizer and lr scheduler lr_scale_ratio = 1 if config.get('auto_lr', None): lr_scale_ratio = auto_scale_lr(config.train_batch_size * get_world_size() * config.gradient_accumulation_steps, config.optimizer, **config.auto_lr) optimizer = build_optimizer(model, config.optimizer) lr_scheduler = build_lr_scheduler(config, optimizer, train_dataloader, lr_scale_ratio) timestamp = time.strftime("%Y-%m-%d_%H:%M:%S", time.localtime()) if accelerator.is_main_process: accelerator.init_trackers(f"tb_{timestamp}") start_epoch = 0 if config.resume_from is not None and config.resume_from['checkpoint'] is not None: start_epoch, missing, unexpected = load_checkpoint(**config.resume_from, model=model, model_ema=model_ema, optimizer=optimizer, lr_scheduler=lr_scheduler, ) if accelerator.is_main_process: print('Warning Missing keys: ', missing) print('Warning Unexpected keys', unexpected) # Prepare everything # There is no specific order to remember, you just need to unpack the # objects in the same order you gave them to the prepare method. model, model_ema = accelerator.prepare(model, model_ema) optimizer, train_dataloader, lr_scheduler = accelerator.prepare(optimizer, train_dataloader, lr_scheduler) train()