def train(cloud_args=None): """training process""" args = parse_args(cloud_args) # init distributed if args.is_distributed: init() args.rank = get_rank() args.group_size = get_group_size() if args.is_dynamic_loss_scale == 1: args.loss_scale = 1 # for dynamic loss scale can not set loss scale in momentum opt # select for master rank save ckpt or all rank save, compatiable for model parallel args.rank_save_ckpt_flag = 0 if args.is_save_on_master: if args.rank == 0: args.rank_save_ckpt_flag = 1 else: args.rank_save_ckpt_flag = 1 # logger args.outputs_dir = os.path.join(args.ckpt_path, datetime.datetime.now().strftime('%Y-%m-%d_time_%H_%M_%S')) args.logger = get_logger(args.outputs_dir, args.rank) # dataloader de_dataset = classification_dataset(args.data_dir, args.image_size, args.per_batch_size, args.max_epoch, args.rank, args.group_size) de_dataset.map_model = 4 # !!!important args.steps_per_epoch = de_dataset.get_dataset_size() args.logger.save_args(args) # network args.logger.important_info('start create network') # get network and init network = get_network(args.backbone, args.num_classes) if network is None: raise NotImplementedError('not implement {}'.format(args.backbone)) network.add_flags_recursive(fp16=True) # loss if not args.label_smooth: args.label_smooth_factor = 0.0 criterion = CrossEntropy(smooth_factor=args.label_smooth_factor, num_classes=args.num_classes) # load pretrain model if os.path.isfile(args.pretrained): param_dict = load_checkpoint(args.pretrained) param_dict_new = {} for key, values in param_dict.items(): if key.startswith('moments.'): continue elif key.startswith('network.'): param_dict_new[key[8:]] = values else: param_dict_new[key] = values load_param_into_net(network, param_dict_new) args.logger.info('load model {} success'.format(args.pretrained)) # lr scheduler if args.lr_scheduler == 'exponential': lr = warmup_step_lr(args.lr, args.lr_epochs, args.steps_per_epoch, args.warmup_epochs, args.max_epoch, gamma=args.lr_gamma, ) elif args.lr_scheduler == 'cosine_annealing': lr = warmup_cosine_annealing_lr(args.lr, args.steps_per_epoch, args.warmup_epochs, args.max_epoch, args.T_max, args.eta_min) else: raise NotImplementedError(args.lr_scheduler) # optimizer opt = Momentum(params=get_param_groups(network), learning_rate=Tensor(lr), momentum=args.momentum, weight_decay=args.weight_decay, loss_scale=args.loss_scale) criterion.add_flags_recursive(fp32=True) # package training process, adjust lr + forward + backward + optimizer train_net = BuildTrainNetwork(network, criterion) if args.is_distributed: parallel_mode = ParallelMode.DATA_PARALLEL else: parallel_mode = ParallelMode.STAND_ALONE if args.is_dynamic_loss_scale == 1: loss_scale_manager = DynamicLossScaleManager(init_loss_scale=65536, scale_factor=2, scale_window=2000) else: loss_scale_manager = FixedLossScaleManager(args.loss_scale, drop_overflow_update=False) # Model api changed since TR5_branch 2020/03/09 context.set_auto_parallel_context(parallel_mode=parallel_mode, device_num=args.group_size, parameter_broadcast=True, mirror_mean=True) model = Model(train_net, optimizer=opt, metrics=None, loss_scale_manager=loss_scale_manager) # checkpoint save progress_cb = ProgressMonitor(args) callbacks = [progress_cb,] if args.rank_save_ckpt_flag: ckpt_max_num = args.max_epoch * args.steps_per_epoch // args.ckpt_interval ckpt_config = CheckpointConfig(save_checkpoint_steps=args.ckpt_interval, keep_checkpoint_max=ckpt_max_num) ckpt_cb = ModelCheckpoint(config=ckpt_config, directory=args.outputs_dir, prefix='{}'.format(args.rank)) callbacks.append(ckpt_cb) model.train(args.max_epoch, de_dataset, callbacks=callbacks, dataset_sink_mode=True)
if args.pre_trained: load_param_into_net(network, load_checkpoint(args.pre_trained)) # lr scheduler if args.lr_scheduler == 'exponential': lr = warmup_step_lr(args.lr, args.lr_epochs, args.steps_per_epoch, args.warmup_epochs, args.max_epoch, gamma=args.lr_gamma, ) elif args.lr_scheduler == 'cosine_annealing': lr = warmup_cosine_annealing_lr(args.lr, args.steps_per_epoch, args.warmup_epochs, args.max_epoch, args.T_max, args.eta_min) elif args.lr_scheduler == 'step': lr = lr_steps(0, lr_init=args.lr_init, lr_max=args.lr_max, warmup_epochs=args.warmup_epochs, total_epochs=args.max_epoch, steps_per_epoch=batch_num) else: raise NotImplementedError(args.lr_scheduler) # optimizer opt = Momentum(params=get_param_groups(network), learning_rate=Tensor(lr), momentum=args.momentum, weight_decay=args.weight_decay, loss_scale=args.loss_scale)
def train(cloud_args=None): """training process""" args = parse_args(cloud_args) context.set_context(mode=context.GRAPH_MODE, enable_auto_mixed_precision=True, device_target=args.platform, save_graphs=False) if os.getenv('DEVICE_ID', "not_set").isdigit(): context.set_context(device_id=int(os.getenv('DEVICE_ID'))) # init distributed if args.is_distributed: if args.platform == "Ascend": init() else: init("nccl") args.rank = get_rank() args.group_size = get_group_size() parallel_mode = ParallelMode.DATA_PARALLEL context.set_auto_parallel_context(parallel_mode=parallel_mode, device_num=args.group_size, parameter_broadcast=True, mirror_mean=True) else: args.rank = 0 args.group_size = 1 if args.is_dynamic_loss_scale == 1: args.loss_scale = 1 # for dynamic loss scale can not set loss scale in momentum opt # select for master rank save ckpt or all rank save, compatiable for model parallel args.rank_save_ckpt_flag = 0 if args.is_save_on_master: if args.rank == 0: args.rank_save_ckpt_flag = 1 else: args.rank_save_ckpt_flag = 1 # logger args.outputs_dir = os.path.join( args.ckpt_path, datetime.datetime.now().strftime('%Y-%m-%d_time_%H_%M_%S')) args.logger = get_logger(args.outputs_dir, args.rank) # dataloader de_dataset = classification_dataset(args.data_dir, args.image_size, args.per_batch_size, 1, args.rank, args.group_size, num_parallel_workers=8) de_dataset.map_model = 4 # !!!important args.steps_per_epoch = de_dataset.get_dataset_size() args.logger.save_args(args) # network args.logger.important_info('start create network') # get network and init network = get_network(args.backbone, args.num_classes, platform=args.platform) if network is None: raise NotImplementedError('not implement {}'.format(args.backbone)) # load pretrain model if os.path.isfile(args.pretrained): param_dict = load_checkpoint(args.pretrained) param_dict_new = {} for key, values in param_dict.items(): if key.startswith('moments.'): continue elif key.startswith('network.'): param_dict_new[key[8:]] = values else: param_dict_new[key] = values load_param_into_net(network, param_dict_new) args.logger.info('load model {} success'.format(args.pretrained)) # lr scheduler if args.lr_scheduler == 'exponential': lr = warmup_step_lr( args.lr, args.lr_epochs, args.steps_per_epoch, args.warmup_epochs, args.max_epoch, gamma=args.lr_gamma, ) elif args.lr_scheduler == 'cosine_annealing': lr = warmup_cosine_annealing_lr(args.lr, args.steps_per_epoch, args.warmup_epochs, args.max_epoch, args.T_max, args.eta_min) else: raise NotImplementedError(args.lr_scheduler) # optimizer opt = Momentum(params=get_param_groups(network), learning_rate=Tensor(lr), momentum=args.momentum, weight_decay=args.weight_decay, loss_scale=args.loss_scale) # loss if not args.label_smooth: args.label_smooth_factor = 0.0 loss = CrossEntropy(smooth_factor=args.label_smooth_factor, num_classes=args.num_classes) if args.is_dynamic_loss_scale == 1: loss_scale_manager = DynamicLossScaleManager(init_loss_scale=65536, scale_factor=2, scale_window=2000) else: loss_scale_manager = FixedLossScaleManager(args.loss_scale, drop_overflow_update=False) if args.platform == "Ascend": model = Model(network, loss_fn=loss, optimizer=opt, loss_scale_manager=loss_scale_manager, metrics={'acc'}, amp_level="O3") else: auto_mixed_precision(network) model = Model(network, loss_fn=loss, optimizer=opt, loss_scale_manager=loss_scale_manager, metrics={'acc'}) # checkpoint save progress_cb = ProgressMonitor(args) callbacks = [ progress_cb, ] if args.rank_save_ckpt_flag: ckpt_config = CheckpointConfig( save_checkpoint_steps=args.ckpt_interval * args.steps_per_epoch, keep_checkpoint_max=args.ckpt_save_max) ckpt_cb = ModelCheckpoint(config=ckpt_config, directory=args.outputs_dir, prefix='{}'.format(args.rank)) callbacks.append(ckpt_cb) model.train(args.max_epoch, de_dataset, callbacks=callbacks, dataset_sink_mode=True)