float32/video_caption.py

import argparse
import os
import ruamel_yaml as yaml
import numpy as np
import random
import time
import datetime
import json
from pathlib import Path

import torch
import torch.backends.cudnn as cudnn
import torch.distributed as dist


from models.epalm import ePALM
from models.utils import freeze_whole_model, unfreeze_parameters, print_trainable_params_percentage

 

from transformers import AutoTokenizer


import utils



from dataset.video_caption import get_loader 

from scheduler import create_scheduler
from optim import create_optimizer
 




from models.utils import filter_state, filter_msg, exclude_list



def train(model, data_loader, optimizer, tokenizer, epoch, warmup_steps, device, scheduler, config):
    # train
    model.train()  
    
    metric_logger = utils.MetricLogger(delimiter="  ")
    metric_logger.add_meter('lr', utils.SmoothedValue(window_size=1, fmt='{value:.6f}'))
    metric_logger.add_meter('loss', utils.SmoothedValue(window_size=1, fmt='{value:.4f}'))

    header = 'Train Epoch: [{}]'.format(epoch)
    print_freq = 50    
    step_size = 100
    warmup_iterations = warmup_steps*step_size  
    lm_loss_weight = config.get('lm_loss_weight', 1)
    append_eos_token = config.get('append_eos_token', False)
    eos_token = tokenizer.eos_token

    config_optim = utils.AttrDict(config['optimizer'])
    prompt_lr = config_optim.prompt_lr if hasattr(config_optim, 'prompt_lr') else None

    task_prompt = config.get('task_prompt', None)

    if prompt_lr is not None:
        metric_logger.add_meter('prompt_lr', utils.SmoothedValue(window_size=1, fmt='{value:.6f}'))


    for i, batch in enumerate(metric_logger.log_every(data_loader, print_freq, header)):

        image = batch["images"].to(device,non_blocking=True)

        text = batch["sent"]

        if append_eos_token:
            text = [t.replace(eos_token, '') + eos_token for t in text]

        if task_prompt is not None:
            text = [task_prompt + ' ' + t for t in text]



        text_input = tokenizer(text, padding='longest', return_tensors="pt").to(device) 


        targets = text_input.input_ids.masked_fill(text_input.input_ids == tokenizer.pad_token_id, -100)
        

        answer_output = model(image=image, 
                              text=text_input, 
                              labels = targets,
                              return_dict = True,   
                              mode='train',
                              reduction='none',
                             )      
        
        loss = answer_output.loss         
        loss = loss.sum()/image.size(0)
        loss = loss*lm_loss_weight
        
        optimizer.zero_grad()
        loss.backward()
        optimizer.step()    
        
        metric_logger.update(loss=loss.item())
        metric_logger.update(lr=optimizer.param_groups[0]["lr"])
        if prompt_lr is not None:
            metric_logger.update(prompt_lr=optimizer.param_groups[1]["lr"])
        if epoch==0 and i%step_size==0 and i<=warmup_iterations: 
            scheduler.step(i//step_size) 

            
    # gather the stats from all processes
    metric_logger.synchronize_between_processes()
    print("Averaged stats:", metric_logger.global_avg())     
    return {k: "{:.3f}".format(meter.global_avg) for k, meter in metric_logger.meters.items()} 




@torch.no_grad()
def evaluation(model, data_loader, tokenizer, device, config, max_length=30, nlgeval=None):
    model.eval()
            
    metric_logger = utils.MetricLogger(delimiter="  ")
    header = 'Generate Caption test result:'
    print_freq = 50
    

    predictions = []
    targets = []


    task_prompt = config.get('task_prompt', None)

    pad_token = tokenizer.pad_token
    eos_token = tokenizer.eos_token

    for n, batch in enumerate(metric_logger.log_every(data_loader, print_freq, header)):        
        
        image = batch["images"].to(device,non_blocking=True)
        text = ['' for q in image]  
        if task_prompt is not None:
            text = [task_prompt + ' ' + t for t in text]
        text_input = tokenizer(text, padding='longest', return_tensors="pt").to(device) 

        out = model(image=image, text=text_input, mode='generate', return_dict=True, max_length=max_length, do_sample=True)
        out_decode = []
        for i, o in enumerate(out):
            try:

                res = tokenizer.decode(o)
                response = res.split('</s>')[1].replace(pad_token, '').replace('</s>', '').replace(eos_token, '') # skip_special_tokens=True
            except TypeError:
                print(o)
                response = ' '
                
            if task_prompt is not None:
                response = response.replace(task_prompt, '')
            out_decode.append(response)


        predictions.extend(out_decode)

        if 'targets' in batch:
            targets.extend(batch['targets'])


    evaluator = data_loader.evaluator
    eval_results = evaluator.evaluate(predictions, targets)


    wandb_log_dict = {}

    for score_name, score in eval_results.items():
        wandb_log_dict[f'Valid/{score_name}'] = score


    print(wandb_log_dict)


    return wandb_log_dict



def main(args, config):

    utils.init_distributed_mode(args)    
    
    device = torch.device(args.device)

    # fix the seed for reproducibility
    seed = args.seed + utils.get_rank()
    torch.manual_seed(seed)
    np.random.seed(seed)
    random.seed(seed)
    cudnn.benchmark = True
    
    start_epoch = 0
    max_epoch = config['schedular']['epochs']
    warmup_steps = config['schedular']['warmup_epochs']
    
    print(args, config)


    tokenizer = AutoTokenizer.from_pretrained(args.text_model, use_fast=False, local_files_only=True)

    special_answer_token = config.get('special_answer_token', None)
    special_eo_answer_token = config.get('special_eo_answer_token', None)


    if special_answer_token is not None:
        special_tokens_dict = {'additional_special_tokens': [special_answer_token]}
        if special_eo_answer_token is not None:
            special_tokens_dict['additional_special_tokens'] += [special_eo_answer_token]

        tokenizer.add_special_tokens(special_tokens_dict)
        print("Adding special token:", special_tokens_dict)
        print(tokenizer)


    
    if args.distributed:
        num_tasks = utils.get_world_size()
        global_rank = utils.get_rank()     
    else:
        num_tasks = None
        global_rank = None


    #########
    max_length = args.max_gen_length

    num_workers = config.get('num_workers', 4)
    train_topk = config.get('train_topk', -1)
    valid_topk = config.get('valid_topk', -1)
    data_dir = args.data_dir

    args.image_size = config.get('image_res', 224)
    args.use_data_augmentation = True 

    black_image = config.get('black_image', False)

    print("black image:", black_image)



    # video 
    args.num_frames = config.get('num_frames', 4)
    args.as_images = config.get('as_images', True)
    args.num_tries = config.get('num_tries', 1)
    args.sample_type = config.get('sample_type', 'rand')



    train_split = config.get('train_split', 'train') 
    val_split = config.get('val_split', 'val') 
    test_split = config.get('test_split', 'test') 


    train_loader = get_loader(
        args,
        split=train_split, mode='train', batch_size=config['batch_size_train'],
        distributed=args.distributed,
        workers=num_workers,
        topk=train_topk,
        data_dir=data_dir,
        local_rank=global_rank, world_size=num_tasks, verbose=True, black_image=black_image
    )

    print('# len train loader:', len(train_loader))
    print(f'Building val loader')
    val_loader = get_loader(
        args,
        split=val_split, mode='val', batch_size=config['batch_size_test'],
        distributed=False, 
        workers=4,
        topk=valid_topk,data_dir=data_dir,
        local_rank=global_rank, world_size=num_tasks, verbose=True, black_image=black_image
    )
    print('# len val loader:', len(val_loader))

    print(f'Building test loader')
    test_loader = get_loader(
        args,
        split=test_split, mode='val', batch_size=config['batch_size_test'],
        distributed=False, 
        workers=4,
        topk=valid_topk,data_dir=data_dir,
        local_rank=global_rank, world_size=num_tasks, verbose=True
    )


    print('# len test loader:', len(test_loader))

    #### Model #### 
    print("Creating model")
    
    start_layer_idx = config.get('start_layer_idx', 0)
    end_layer_idx = config.get('end_layer_idx', 0)

    vision_model_name = config.get('vision_model_name', args.vision_model)

    model = ePALM(opt_model_name = args.text_model, 
                   vision_model_name = vision_model_name, 
                   use_vis_prefix = True, 
                   start_layer_idx = start_layer_idx, 
                   end_layer_idx = end_layer_idx, 
                   return_hidden_state_vision = True, 
                   config=config,
    )
    
        
    model = model.to(device)   
    
    arg_opt = utils.AttrDict(config['optimizer'])
    optimizer = create_optimizer(arg_opt, model, config=config)

    if hasattr(arg_opt, 'prompt_lr') and arg_opt.prompt_lr is not None:
        print('\tInitial other params params lr: %f' % optimizer.param_groups[0]['lr'])
        print('\tInitial prompt params lr: %f' % optimizer.param_groups[1]['lr'])

    arg_sche = utils.AttrDict(config['schedular'])
    lr_scheduler, _ = create_scheduler(arg_sche, optimizer)          
         
    best_epoch = 0 
    best_valid = 0 
    

    nlgeval = None

    if args.checkpoint:    

        checkpoint = torch.load(args.checkpoint, map_location='cpu') 
        state_dict = checkpoint['model']
        msg = model.load_state_dict(state_dict,strict=False)  
        msg = filter_msg(msg, exclude_list)
        print('load checkpoint from %s'%args.checkpoint)
        print(msg)  
        if 'best_valid' in checkpoint:
            print("load best valid {} at epoch {}".format(checkpoint['best_valid'] , checkpoint['best_epoch'] ))

        if args.resume:
            model = model.to(device) 
            optimizer.load_state_dict(checkpoint['optimizer'])
            lr_scheduler.load_state_dict(checkpoint['lr_scheduler'])
            start_epoch = checkpoint['epoch']+1  
            print(checkpoint.keys())
            if 'best_valid' in checkpoint:
                best_valid = checkpoint['best_valid'] 
                best_epoch = checkpoint['best_epoch'] 
                print("load best valid {} at epoch {}".format(best_valid, best_epoch))

    
    freeze_whole_model(model)
    unfreeze_parameters(model, config)
    print_trainable_params_percentage(model)
    
    model_without_ddp = model
    if args.distributed:
        model = torch.nn.parallel.DistributedDataParallel(model, device_ids=[args.gpu])
        model_without_ddp = model.module    
    
    
    print("Start training")
    start_time = time.time()


    for epoch in range(start_epoch, max_epoch):
        if epoch>0:
            lr_scheduler.step(epoch+warmup_steps)  
        
        if not args.evaluate:
            if args.distributed:
                train_loader.sampler.set_epoch(epoch)

            train_stats = train(model, train_loader, optimizer, tokenizer, epoch, warmup_steps, device, lr_scheduler, config)  

        if args.evaluate:
            break
            

        valid_results = evaluation(model, val_loader, tokenizer, device, config, max_length=max_length, nlgeval=nlgeval) 

        if utils.is_main_process():               
            log_stats = {**{f'train_{k}': v for k, v in train_stats.items()},
                         'epoch': epoch,
                        }                
            with open(os.path.join(args.output_dir, "log.txt"),"a") as f:
                f.write(json.dumps(log_stats) + "\n")                        
                    
            save_obj = {
                'model': filter_state(model_without_ddp.state_dict(), exclude_list),
                'optimizer': optimizer.state_dict(),
                'lr_scheduler': lr_scheduler.state_dict(),
                'config': config,
                'epoch': epoch,
                'best_valid': best_valid,
                'best_epoch': best_epoch,
            }

            if args.save_best:
                valid_score = valid_results['Valid/CIDEr']

                if valid_score > best_valid or epoch == 0:
                    best_valid = valid_score
                    best_epoch = epoch
                    print("Save best epoch:", best_epoch)

                    save_obj['best_valid'] = best_valid
                    save_obj['best_epoch'] = best_epoch

                    torch.save(save_obj, os.path.join(args.output_dir, 'checkpoint_best.pth'))  
            torch.save(save_obj, os.path.join(args.output_dir, 'checkpoint_last.pth'))  


        dist.barrier()   
    




    if not args.evaluate:
        checkpoint = torch.load(os.path.join(args.output_dir, 'checkpoint_best.pth'), map_location='cpu') 
        state_dict = checkpoint['model']   
        msg = model.module.load_state_dict(state_dict,strict=False)  
        msg = filter_msg(msg, exclude_list)
        print('load checkpoint for test from %s'%args.checkpoint)
        print(msg)
    vqa_result = evaluation(model, test_loader, tokenizer, device, config, max_length=max_length, nlgeval=nlgeval)    

                     
    total_time = time.time() - start_time
    total_time_str = str(datetime.timedelta(seconds=int(total_time)))
    print('Training time {}'.format(total_time_str)) 
    
            

if __name__ == '__main__':
    parser = argparse.ArgumentParser()
    parser.add_argument('--config', default='./configs/VQA.yaml') 
    parser.add_argument('--checkpoint', default='') 
    parser.add_argument('--output_dir', default='output/vqa')
    parser.add_argument('--evaluate', action='store_true')    
    parser.add_argument('--text_model', default='facebook/opt-350m')
    parser.add_argument('--vision_model', default='vit_base_patch16_224')
    parser.add_argument('--device', default='cuda')
    parser.add_argument('--seed', default=42, type=int)
    parser.add_argument('--world_size', default=1, type=int, help='number of distributed processes')    
    parser.add_argument('--dist_url', default='env://', help='url used to set up distributed training')
    parser.add_argument('--distributed', default=True, type=bool)
    
    parser.add_argument('--data_dir', default='/data/mshukor/data')   
    parser.add_argument('--resume', action='store_true')    

    parser.add_argument('--save_best', action='store_true') 
    
    parser.add_argument('--image_dir', default='/data/mshukor/data')   
    parser.add_argument('--max_gen_length', default=30, type=int, help='max_gen_length')    

    

    args = parser.parse_args()

    config = yaml.load(open(args.config, 'r'), Loader=yaml.Loader)

    args.result_dir = os.path.join(args.output_dir, 'result')

    Path(args.output_dir).mkdir(parents=True, exist_ok=True)
    Path(args.result_dir).mkdir(parents=True, exist_ok=True)
        
    yaml.dump(config, open(os.path.join(args.output_dir, 'config.yaml'), 'w'))    
    
    main(args, config)