import os import math import argparse import random import logging import shutil from tqdm import tqdm import torch 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 from time import time def init_dist(backend='nccl', **kwargs): # These packages have globals that screw with Windows, so only import them if needed. import torch.distributed as dist import torch.multiprocessing as mp """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/pretrain_spsr_switched2_psnr.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) colab_mode = False if 'colab_mode' not in opt.keys() else opt['colab_mode'] if colab_mode: # Check the configuration of the remote server. Expect models, resume_state, and val_images directories to be there. # Each one should have a TEST file in it. util.get_files_from_server(opt['ssh_server'], opt['ssh_username'], opt['ssh_password'], os.path.join(opt['remote_path'], 'training_state', "TEST")) util.get_files_from_server(opt['ssh_server'], opt['ssh_username'], opt['ssh_password'], os.path.join(opt['remote_path'], 'models', "TEST")) util.get_files_from_server(opt['ssh_server'], opt['ssh_username'], opt['ssh_password'], os.path.join(opt['remote_path'], 'val_images', "TEST")) # Load the state and models needed from the remote server. if opt['path']['resume_state']: util.get_files_from_server(opt['ssh_server'], opt['ssh_username'], opt['ssh_password'], os.path.join(opt['remote_path'], 'training_state', opt['path']['resume_state'])) if opt['path']['pretrain_model_G']: util.get_files_from_server(opt['ssh_server'], opt['ssh_username'], opt['ssh_password'], os.path.join(opt['remote_path'], 'models', opt['path']['pretrain_model_G'])) if opt['path']['pretrain_model_D']: util.get_files_from_server(opt['ssh_server'], opt['ssh_username'], opt['ssh_password'], os.path.join(opt['remote_path'], 'models', opt['path']['pretrain_model_D'])) #### 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 = os.path.join(opt['path']['experiments_root'], 'tb_logger') 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 = 1 # 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 if 'start_step' not in opt.keys() else opt['start_step'] 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) _t = time() _profile = False for _, train_data in enumerate(tq_ldr): if _profile: print("Data fetch: %f" % (time() - _t)) _t = time() 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 if _profile: print("Update LR: %f" % (time() - _t)) _t = time() model.feed_data(train_data) model.optimize_parameters(current_step) if _profile: print("Model feed + step: %f" % (time() - _t)) _t = time() #### log if current_step % opt['logger']['print_freq'] == 0: logs = model.get_current_log(current_step) 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(): if 'histogram' in k: if rank <= 0: tb_logger.add_histogram(k, v, current_step) else: 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', 'spsrgan', 'extensibletrainer'] and rank <= 0: # image restoration validation model.force_restore_swapout() val_batch_sz = 1 if 'batch_size' not in opt['datasets']['val'].keys() else opt['datasets']['val']['batch_size'] # does not support multi-GPU validation pbar = util.ProgressBar(len(val_loader) * val_batch_sz) avg_psnr = 0. avg_fea_loss = 0. idx = 0 colab_imgs_to_copy = [] for val_data in val_loader: idx += 1 for b in range(len(val_data['LQ_path'])): img_name = os.path.splitext(os.path.basename(val_data['LQ_path'][b]))[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() if visuals is None: continue sr_img = util.tensor2img(visuals['rlt'][b]) # uint8 #gt_img = util.tensor2img(visuals['GT'][b]) # uint8 # Save SR images for reference img_base_name = '{:s}_{:d}.png'.format(img_name, current_step) save_img_path = os.path.join(img_dir, img_base_name) util.save_img(sr_img, save_img_path) if colab_mode: colab_imgs_to_copy.append(save_img_path) # calculate PSNR (Naw - don't do that. PSNR sucks) #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)) # calculate fea loss avg_fea_loss += model.compute_fea_loss(visuals['rlt'][b], visuals['GT'][b]) if colab_mode: util.copy_files_to_server(opt['ssh_server'], opt['ssh_username'], opt['ssh_password'], colab_imgs_to_copy, os.path.join(opt['remote_path'], 'val_images', img_base_name)) avg_psnr = avg_psnr / idx avg_fea_loss = avg_fea_loss / idx # log logger.info('# Validation # PSNR: {:.4e} Fea: {:.4e}'.format(avg_psnr, avg_fea_loss)) # tensorboard logger if opt['use_tb_logger'] and 'debug' not in opt['name']: #tb_logger.add_scalar('val_psnr', avg_psnr, current_step) tb_logger.add_scalar('val_fea', avg_fea_loss, 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 'alt_path' in opt['path'].keys(): import shutil print("Synchronizing tb_logger to alt_path..") alt_tblogger = os.path.join(opt['path']['alt_path'], "tb_logger") shutil.rmtree(alt_tblogger, ignore_errors=True) shutil.copytree(tb_logger_path, alt_tblogger) if rank <= 0: logger.info('Saving the final model.') model.save('latest') logger.info('End of training.') tb_logger.close() if __name__ == '__main__': main()