import os import math import argparse import random import logging import shutil from tqdm import tqdm import torch #import torch.distributed as dist #import torch.multiprocessing as mp from data.data_sampler import DistIterSampler import options.options as option from utils import util from data import create_dataloader, create_dataset from models import create_model def init_dist(backend='nccl', **kwargs): """initialization for distributed training""" if mp.get_start_method(allow_none=True) != 'spawn': mp.set_start_method('spawn') rank = int(os.environ['RANK']) num_gpus = torch.cuda.device_count() torch.cuda.set_device(rank % num_gpus) dist.init_process_group(backend=backend, **kwargs) def main(): #### options parser = argparse.ArgumentParser() parser.add_argument('-opt', type=str, help='Path to option YAML file.', default='options/train/train_vix_corrupt_tiled.yml') parser.add_argument('--launcher', choices=['none', 'pytorch'], default='none', help='job launcher') parser.add_argument('--local_rank', type=int, default=0) args = parser.parse_args() opt = option.parse(args.opt, is_train=True) #### distributed training settings if args.launcher == 'none': # disabled distributed training opt['dist'] = False rank = -1 print('Disabled distributed training.') else: opt['dist'] = True init_dist() world_size = torch.distributed.get_world_size() rank = torch.distributed.get_rank() #### loading resume state if exists if opt['path'].get('resume_state', None): # distributed resuming: all load into default GPU device_id = torch.cuda.current_device() resume_state = torch.load(opt['path']['resume_state'], map_location=lambda storage, loc: storage.cuda(device_id)) option.check_resume(opt, resume_state['iter']) # check resume options else: resume_state = None #### mkdir and loggers if rank <= 0: # normal training (rank -1) OR distributed training (rank 0) if resume_state is None: util.mkdir_and_rename( opt['path']['experiments_root']) # rename experiment folder if exists util.mkdirs((path for key, path in opt['path'].items() if not key == 'experiments_root' and 'pretrain_model' not in key and 'resume' not in key)) # config loggers. Before it, the log will not work util.setup_logger('base', opt['path']['log'], 'train_' + opt['name'], level=logging.INFO, screen=True, tofile=True) logger = logging.getLogger('base') logger.info(option.dict2str(opt)) # tensorboard logger if opt['use_tb_logger'] and 'debug' not in opt['name']: tb_logger_path = '../tb_logger/' + opt['name'] # If not resuming, delete the existing logs. Tensorboard doesn't do too great with these. if opt['path'].get('resume_state', None) is None: if os.path.exists(tb_logger_path) and os.path.isdir(tb_logger_path): shutil.rmtree(tb_logger_path) version = float(torch.__version__[0:3]) if version >= 1.1: # PyTorch 1.1 from torch.utils.tensorboard import SummaryWriter else: logger.info( 'You are using PyTorch {}. Tensorboard will use [tensorboardX]'.format(version)) from tensorboardX import SummaryWriter tb_logger = SummaryWriter(log_dir=tb_logger_path) else: util.setup_logger('base', opt['path']['log'], 'train', level=logging.INFO, screen=True) logger = logging.getLogger('base') # convert to NoneDict, which returns None for missing keys opt = option.dict_to_nonedict(opt) #### random seed seed = opt['train']['manual_seed'] if seed is None: seed = random.randint(1, 10000) if rank <= 0: logger.info('Random seed: {}'.format(seed)) util.set_random_seed(seed) torch.backends.cudnn.benchmark = True # torch.backends.cudnn.deterministic = True #### create train and val dataloader dataset_ratio = 200 # enlarge the size of each epoch for phase, dataset_opt in opt['datasets'].items(): if phase == 'train': train_set = create_dataset(dataset_opt) train_size = int(math.ceil(len(train_set) / dataset_opt['batch_size'])) total_iters = int(opt['train']['niter']) total_epochs = int(math.ceil(total_iters / train_size)) if opt['dist']: train_sampler = DistIterSampler(train_set, world_size, rank, dataset_ratio) total_epochs = int(math.ceil(total_iters / (train_size * dataset_ratio))) else: train_sampler = None train_loader = create_dataloader(train_set, dataset_opt, opt, train_sampler) if rank <= 0: logger.info('Number of train images: {:,d}, iters: {:,d}'.format( len(train_set), train_size)) logger.info('Total epochs needed: {:d} for iters {:,d}'.format( total_epochs, total_iters)) elif phase == 'val': val_set = create_dataset(dataset_opt) val_loader = create_dataloader(val_set, dataset_opt, opt, None) if rank <= 0: logger.info('Number of val images in [{:s}]: {:d}'.format( dataset_opt['name'], len(val_set))) else: raise NotImplementedError('Phase [{:s}] is not recognized.'.format(phase)) assert train_loader is not None #### create model model = create_model(opt) #### resume training if resume_state: logger.info('Resuming training from epoch: {}, iter: {}.'.format( resume_state['epoch'], resume_state['iter'])) start_epoch = resume_state['epoch'] current_step = resume_state['iter'] model.resume_training(resume_state) # handle optimizers and schedulers else: current_step = -1 start_epoch = 0 #### training logger.info('Start training from epoch: {:d}, iter: {:d}'.format(start_epoch, current_step)) for epoch in range(start_epoch, total_epochs + 1): if opt['dist']: train_sampler.set_epoch(epoch) tq_ldr = tqdm(train_loader) for _, train_data in enumerate(tq_ldr): current_step += 1 if current_step > total_iters: break #### update learning rate model.update_learning_rate(current_step, warmup_iter=opt['train']['warmup_iter']) #### training model.feed_data(train_data) model.optimize_parameters(current_step) #### log if current_step % opt['logger']['print_freq'] == 0: logs = model.get_current_log() message = '[epoch:{:3d}, iter:{:8,d}, lr:('.format(epoch, current_step) for v in model.get_current_learning_rate(): message += '{:.3e},'.format(v) message += ')] ' for k, v in logs.items(): message += '{:s}: {:.4e} '.format(k, v) # tensorboard logger if opt['use_tb_logger'] and 'debug' not in opt['name']: if rank <= 0: tb_logger.add_scalar(k, v, current_step) if rank <= 0: logger.info(message) #### validation if opt['datasets'].get('val', None) and current_step % opt['train']['val_freq'] == 0: if opt['model'] in ['sr', 'srgan', 'corruptgan'] and rank <= 0: # image restoration validation # does not support multi-GPU validation pbar = util.ProgressBar(len(val_loader)) avg_psnr = 0. idx = 0 for val_data in val_loader: idx += 1 if idx >= 20: break img_name = os.path.splitext(os.path.basename(val_data['LQ_path'][0]))[0] img_dir = os.path.join(opt['path']['val_images'], img_name) util.mkdir(img_dir) model.feed_data(val_data) model.test() visuals = model.get_current_visuals() sr_img = util.tensor2img(visuals['rlt']) # uint8 gt_img = util.tensor2img(visuals['GT']) # uint8 # Save SR images for reference save_img_path = os.path.join(img_dir, '{:s}_{:d}.png'.format(img_name, current_step)) util.save_img(sr_img, save_img_path) # calculate PSNR sr_img, gt_img = util.crop_border([sr_img, gt_img], opt['scale']) avg_psnr += util.calculate_psnr(sr_img, gt_img) pbar.update('Test {}'.format(img_name)) avg_psnr = avg_psnr / idx # log logger.info('# Validation # PSNR: {:.4e}'.format(avg_psnr)) # tensorboard logger if opt['use_tb_logger'] and 'debug' not in opt['name']: tb_logger.add_scalar('psnr', avg_psnr, current_step) else: # video restoration validation if opt['dist']: # multi-GPU testing psnr_rlt = {} # with border and center frames if rank == 0: pbar = util.ProgressBar(len(val_set)) for idx in range(rank, len(val_set), world_size): val_data = val_set[idx] val_data['LQs'].unsqueeze_(0) val_data['GT'].unsqueeze_(0) folder = val_data['folder'] idx_d, max_idx = val_data['idx'].split('/') idx_d, max_idx = int(idx_d), int(max_idx) if psnr_rlt.get(folder, None) is None: psnr_rlt[folder] = torch.zeros(max_idx, dtype=torch.float32, device='cuda') # tmp = torch.zeros(max_idx, dtype=torch.float32, device='cuda') model.feed_data(val_data) model.test() visuals = model.get_current_visuals() rlt_img = util.tensor2img(visuals['rlt']) # uint8 gt_img = util.tensor2img(visuals['GT']) # uint8 # calculate PSNR psnr_rlt[folder][idx_d] = util.calculate_psnr(rlt_img, gt_img) if rank == 0: for _ in range(world_size): pbar.update('Test {} - {}/{}'.format(folder, idx_d, max_idx)) # # collect data for _, v in psnr_rlt.items(): dist.reduce(v, 0) dist.barrier() if rank == 0: psnr_rlt_avg = {} psnr_total_avg = 0. for k, v in psnr_rlt.items(): psnr_rlt_avg[k] = torch.mean(v).cpu().item() psnr_total_avg += psnr_rlt_avg[k] psnr_total_avg /= len(psnr_rlt) log_s = '# Validation # PSNR: {:.4e}:'.format(psnr_total_avg) for k, v in psnr_rlt_avg.items(): log_s += ' {}: {:.4e}'.format(k, v) logger.info(log_s) if opt['use_tb_logger'] and 'debug' not in opt['name']: tb_logger.add_scalar('psnr_avg', psnr_total_avg, current_step) for k, v in psnr_rlt_avg.items(): tb_logger.add_scalar(k, v, current_step) else: pbar = util.ProgressBar(len(val_loader)) psnr_rlt = {} # with border and center frames psnr_rlt_avg = {} psnr_total_avg = 0. for val_data in val_loader: folder = val_data['folder'][0] idx_d = val_data['idx'].item() # border = val_data['border'].item() if psnr_rlt.get(folder, None) is None: psnr_rlt[folder] = [] model.feed_data(val_data) model.test() visuals = model.get_current_visuals() rlt_img = util.tensor2img(visuals['rlt']) # uint8 gt_img = util.tensor2img(visuals['GT']) # uint8 # calculate PSNR psnr = util.calculate_psnr(rlt_img, gt_img) psnr_rlt[folder].append(psnr) pbar.update('Test {} - {}'.format(folder, idx_d)) for k, v in psnr_rlt.items(): psnr_rlt_avg[k] = sum(v) / len(v) psnr_total_avg += psnr_rlt_avg[k] psnr_total_avg /= len(psnr_rlt) log_s = '# Validation # PSNR: {:.4e}:'.format(psnr_total_avg) for k, v in psnr_rlt_avg.items(): log_s += ' {}: {:.4e}'.format(k, v) logger.info(log_s) if opt['use_tb_logger'] and 'debug' not in opt['name']: tb_logger.add_scalar('psnr_avg', psnr_total_avg, current_step) for k, v in psnr_rlt_avg.items(): tb_logger.add_scalar(k, v, current_step) #### save models and training states if current_step % opt['logger']['save_checkpoint_freq'] == 0: if rank <= 0: logger.info('Saving models and training states.') model.save(current_step) model.save_training_state(epoch, current_step) if rank <= 0: logger.info('Saving the final model.') model.save('latest') logger.info('End of training.') tb_logger.close() if __name__ == '__main__': main()