def prepare_model_optimizer(args):
# Loading Model
model = BertMultiTask(args)
# Optimizer parameters
optimizer_grouped_parameters = prepare_optimizer_parameters(args, model)
# DeepSpeed initializer handles FP16, distributed, optimizer automatically.
model.network, optimizer, _, _ = deepspeed.initialize(
args=args,
model=model.network,
model_parameters=optimizer_grouped_parameters)
# Overwrite application configs with DeepSpeed config
args.train_micro_batch_size_per_gpu = model.network.train_micro_batch_size_per_gpu(
)
args.gradient_accumulation_steps = model.network.gradient_accumulation_steps(
)
# Set DeepSpeed info
args.local_rank = model.network.local_rank
args.device = model.network.device
model.set_device(args.device)
args.fp16 = model.network.fp16_enabled()
args.use_lamb = model.network.optimizer_name(
) == deepspeed.pt.deepspeed_config.LAMB_OPTIMIZER
# Prepare Summary Writer and saved_models path
if dist.get_rank() == 0:
summary_writer = get_sample_writer(name=args.job_name,
base=args.output_dir)
args.summary_writer = summary_writer
os.makedirs(args.saved_model_path, exist_ok=True)
return model, optimizer
def construct_arguments():
args = get_arguments()
# Prepare Logger
logger = Logger(cuda=torch.cuda.is_available() and not args.no_cuda)
args.logger = logger
config = json.load(open(args.config_file, 'r', encoding='utf-8'))
args.config = config
job_name = config['name'] if args.job_name is None else args.job_name
print("Running Config File: ", job_name)
# Setting the distributed variables
print("Args = {}".format(args))
if args.local_rank == -1 or args.no_cuda:
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
else:
device = torch.device("cuda", args.local_rank)
n_gpu = 1
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
start_time = time.time()
torch.distributed.init_process_group(backend='nccl')
end_time = time.time()
logger.info("Init_process_group takes %f sec" %
(end_time - start_time))
if args.fp16:
logger.info(
"16-bits distributed training not officially supported but seems to be working."
)
args.fp16 = True # (see https://github.com/pytorch/pytorch/pull/13496)
logger.info(
"device: {} n_gpu: {}, distributed training: {}, 16-bits training: {}".
format(device, n_gpu, bool(args.local_rank != -1), args.fp16))
if args.gradient_accumulation_steps < 1:
raise ValueError(
"Invalid gradient_accumulation_steps parameter: {}, should be >= 1"
.format(args.gradient_accumulation_steps))
args.train_batch_size = int(args.train_batch_size /
args.gradient_accumulation_steps)
# Setting all the seeds so that the task is random but same accross processes
random.seed(args.seed)
np.random.seed(args.seed)
torch.manual_seed(args.seed)
if n_gpu > 0:
torch.cuda.manual_seed_all(args.seed)
# if os.path.exists(args.output_dir) and os.listdir(args.output_dir):
# raise ValueError("Output directory () already exists and is not empty.")
os.makedirs(args.output_dir, exist_ok=True)
args.saved_model_path = os.path.join(args.output_dir, "saved_models/",
job_name)
# Prepare Summary Writer and saved_models path
if (not args.no_cuda
and dist.get_rank() == 0) or (args.no_cuda
and args.local_rank == -1):
summary_writer = get_sample_writer(name=job_name, base=args.output_dir)
args.summary_writer = summary_writer
os.makedirs(args.saved_model_path, exist_ok=True)
# set device
args.device = device
args.n_gpu = n_gpu
# Loading Tokenizer
tokenizer = BertTokenizer.from_pretrained(config["bert_token_file"])
args.tokenizer = tokenizer
# Issue warning if early exit from epoch is configured
if args.max_steps < sys.maxsize:
logging.warning(
'Early training exit is set after {} global steps'.format(
args.max_steps))
if args.max_steps_per_epoch < sys.maxsize:
logging.warning('Early epoch exit is set after {} global steps'.format(
args.max_steps_per_epoch))
return args
