def train(teacher_model, student_model, dataset_dict, ckpt_file_path, device,
device_ids, distributed, config, args):
logger.info('Start training')
train_config = config['train']
lr_factor = args.world_size if distributed and args.adjust_lr else 1
training_box = get_training_box(student_model, dataset_dict, train_config,
device, device_ids, distributed, lr_factor) if teacher_model is None \
else get_distillation_box(teacher_model, student_model, dataset_dict, train_config,
device, device_ids, distributed, lr_factor)
best_val_map = 0.0
optimizer, lr_scheduler = training_box.optimizer, training_box.lr_scheduler
if file_util.check_if_exists(ckpt_file_path):
best_val_map, _, _ = load_ckpt(ckpt_file_path,
optimizer=optimizer,
lr_scheduler=lr_scheduler)
log_freq = train_config['log_freq']
iou_types = args.iou_types
val_iou_type = iou_types[0] if isinstance(
iou_types, (list, tuple)) and len(iou_types) > 0 else 'bbox'
student_model_without_ddp = student_model.module if module_util.check_if_wrapped(
student_model) else student_model
start_time = time.time()
for epoch in range(args.start_epoch, training_box.num_epochs):
training_box.pre_process(epoch=epoch)
train_one_epoch(training_box, device, epoch, log_freq)
val_coco_evaluator =\
evaluate(student_model, training_box.val_data_loader, iou_types, device, device_ids, distributed,
log_freq=log_freq, header='Validation:')
# Average Precision (AP) @[ IoU=0.50:0.95 | area= all | maxDets=100 ]
val_map = val_coco_evaluator.coco_eval[val_iou_type].stats[0]
if val_map > best_val_map and is_main_process():
logger.info('Best mAP ({}): {:.4f} -> {:.4f}'.format(
val_iou_type, best_val_map, val_map))
logger.info('Updating ckpt at {}'.format(ckpt_file_path))
best_val_map = val_map
save_ckpt(student_model_without_ddp, optimizer, lr_scheduler,
best_val_map, config, args, ckpt_file_path)
training_box.post_process()
if distributed:
dist.barrier()
total_time = time.time() - start_time
total_time_str = str(datetime.timedelta(seconds=int(total_time)))
logger.info('Training time {}'.format(total_time_str))
training_box.clean_modules()
def distill(teacher_model, student_model, dataset_dict, device, device_ids,
distributed, config, args):
logger.info('Start distillation')
train_config = config['train']
lr_factor = args.world_size if distributed and args.adjust_lr else 1
distillation_box =\
get_distillation_box(teacher_model, student_model, dataset_dict,
train_config, device, device_ids, distributed, lr_factor)
ckpt_file_path = config['models']['student_model']['ckpt']
best_val_top1_accuracy = 0.0
optimizer, lr_scheduler = distillation_box.optimizer, distillation_box.lr_scheduler
if file_util.check_if_exists(ckpt_file_path):
best_val_top1_accuracy, _, _ = load_ckpt(ckpt_file_path,
optimizer=optimizer,
lr_scheduler=lr_scheduler)
log_freq = train_config['log_freq']
student_model_without_ddp = student_model.module if module_util.check_if_wrapped(
student_model) else student_model
start_time = time.time()
for epoch in range(args.start_epoch, distillation_box.num_epochs):
distillation_box.pre_process(epoch=epoch)
distill_one_epoch(distillation_box, device, epoch, log_freq)
val_top1_accuracy = evaluate(student_model,
distillation_box.val_data_loader,
device,
device_ids,
distributed,
log_freq=log_freq,
header='Validation:')
if val_top1_accuracy > best_val_top1_accuracy and is_main_process():
logger.info('Updating ckpt (Best top1 accuracy: '
'{:.4f} -> {:.4f})'.format(best_val_top1_accuracy,
val_top1_accuracy))
best_val_top1_accuracy = val_top1_accuracy
save_ckpt(student_model_without_ddp, optimizer, lr_scheduler,
best_val_top1_accuracy, config, args, ckpt_file_path)
distillation_box.post_process()
if distributed:
dist.barrier()
total_time = time.time() - start_time
total_time_str = str(datetime.timedelta(seconds=int(total_time)))
logger.info('Training time {}'.format(total_time_str))
distillation_box.clean_modules()
def train(teacher_model, student_model, dataset_dict, ckpt_file_path, device,
device_ids, distributed, config, args):
logger.info('Start training')
train_config = config['train']
lr_factor = args.world_size if distributed and args.adjust_lr else 1
training_box = get_training_box(student_model, dataset_dict, train_config,
device, device_ids, distributed, lr_factor) if teacher_model is None \
else get_distillation_box(teacher_model, student_model, dataset_dict, train_config,
device, device_ids, distributed, lr_factor)
best_val_miou = 0.0
optimizer, lr_scheduler = training_box.optimizer, training_box.lr_scheduler
if file_util.check_if_exists(ckpt_file_path):
best_val_miou, _, _ = load_ckpt(ckpt_file_path,
optimizer=optimizer,
lr_scheduler=lr_scheduler)
log_freq = train_config['log_freq']
student_model_without_ddp = student_model.module if module_util.check_if_wrapped(
student_model) else student_model
start_time = time.time()
for epoch in range(args.start_epoch, training_box.num_epochs):
training_box.pre_process(epoch=epoch)
train_one_epoch(training_box, device, epoch, log_freq)
val_seg_evaluator =\
evaluate(student_model, training_box.val_data_loader, device, device_ids, distributed,
num_classes=args.num_classes, log_freq=log_freq, header='Validation:')
val_acc_global, val_acc, val_iou = val_seg_evaluator.compute()
val_miou = val_iou.mean().item()
if val_miou > best_val_miou and is_main_process():
logger.info('Updating ckpt (Best mIoU: {:.4f} -> {:.4f})'.format(
best_val_miou, val_miou))
best_val_miou = val_miou
save_ckpt(student_model_without_ddp, optimizer, lr_scheduler,
best_val_miou, config, args, ckpt_file_path)
training_box.post_process()
if distributed:
dist.barrier()
total_time = time.time() - start_time
total_time_str = str(datetime.timedelta(seconds=int(total_time)))
logger.info('Training time {}'.format(total_time_str))
training_box.clean_modules()