def train(args, train_dataset, model, tokenizer):
""" Train the model """
tb_writer = SummaryWriter()
args.train_batch_size = args.per_gpu_train_batch_size * max(1, args.n_gpu)
train_sampler = RandomSampler(train_dataset)
train_dataloader = DataLoader(train_dataset,
sampler=train_sampler,
batch_size=args.train_batch_size)
if args.max_steps > 0:
t_total = args.max_steps
args.num_train_epochs = args.max_steps // (
len(train_dataloader) // args.gradient_accumulation_steps) + 1
else:
t_total = len(
train_dataloader
) // args.gradient_accumulation_steps * args.num_train_epochs
warm_up_steps = int(args.warmup_steps * t_total)
save_steps = int(args.save_steps * t_total)
# Prepare optimizer and schedule (linear warmup and decay)
no_decay = ['bias', 'LayerNorm.weight']
a = []
b = []
c = []
d = []
optimizer_grouped_parameters = []
for n, p in model.named_parameters():
if 'classifier' in n or 'linear_r' in n or 'linear_g' in n:
if any(nd in n for nd in no_decay):
a.append(p)
else:
b.append(p)
else:
if any(nd in n for nd in no_decay):
c.append(p)
else:
d.append(p)
optimizer_grouped_parameters.append({
"params": a,
"weight_decay": 0,
"lr": 2e-3
})
optimizer_grouped_parameters.append({
"params": b,
"weight_decay": args.weight_decay,
"lr": 2e-3
})
optimizer_grouped_parameters.append({"params": c, "weight_decay": 0})
optimizer_grouped_parameters.append({
"params": d,
"weight_decay": args.weight_decay
})
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=warm_up_steps,
t_total=t_total)
# multi-gpu training (should be after apex fp16 initialization)
if args.n_gpu > 1:
model = torch.nn.DataParallel(model)
# Train!
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_dataset))
logger.info(" Num Epochs = %d", args.num_train_epochs)
logger.info(" Instantaneous batch size per GPU = %d",
args.per_gpu_train_batch_size)
logger.info(
" Total train batch size (w. parallel, distributed & accumulation) = %d",
args.train_batch_size * args.gradient_accumulation_steps)
logger.info(" Gradient Accumulation steps = %d",
args.gradient_accumulation_steps)
logger.info(" Total optimization steps = %d", t_total)
global_step = 0
tr_loss, logging_loss = 0.0, 0.0
model.zero_grad()
train_iterator = trange(int(args.num_train_epochs), desc="Epoch")
set_seed(
args) # Added here for reproductibility (even between python 2 and 3)
for _ in train_iterator:
epoch_iterator = tqdm(train_dataloader, desc="Iteration")
for step, batch in enumerate(epoch_iterator):
model.train()
batch = tuple(t.to(args.device) for t in batch)
inputs = {
'input_ids': batch[0],
'attention_mask': batch[1],
'align_mask': batch[2],
'labels': batch[4]
}
inputs['token_type_ids'] = None
outputs = model(**inputs)
loss = outputs[
0] # model outputs are always tuple in transformers (see doc)
if args.n_gpu > 1:
loss = loss.mean(
) # mean() to average on multi-gpu parallel training
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
loss.backward()
tr_loss += loss.item()
if (step + 1) % args.gradient_accumulation_steps == 0:
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
optimizer.step()
scheduler.step() # Update learning rate schedule
model.zero_grad()
global_step += 1
if args.logging_steps > 0 and global_step % args.logging_steps == 0:
# Log metrics
tb_writer.add_scalar('lr_n',
scheduler.get_lr()[0], global_step)
tb_writer.add_scalar('lr_o',
scheduler.get_lr()[2], global_step)
tb_writer.add_scalar('loss', (tr_loss - logging_loss) /
args.logging_steps, global_step)
logging_loss = tr_loss
if save_steps > 0 and global_step % save_steps == 0:
# Save model checkpoint
if args.evaluate_during_training: # Only evaluate when single GPU otherwise metrics may not average well
results = evaluate(args, model, tokenizer)
for key, value in results.items():
tb_writer.add_scalar('eval_{}'.format(key), value,
global_step)
output_dir = os.path.join(
args.output_dir, 'checkpoint-{}'.format(global_step))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
model_to_save = model.module if hasattr(
model, 'module'
) else model # Take care of distributed/parallel training
model_to_save.save_pretrained(output_dir)
torch.save(args,
os.path.join(output_dir, 'training_args.bin'))
logger.info("Saving model checkpoint to %s", output_dir)
if args.max_steps > 0 and global_step > args.max_steps:
epoch_iterator.close()
break
if args.max_steps > 0 and global_step > args.max_steps:
train_iterator.close()
break
tb_writer.close()
return global_step, tr_loss / global_step
def train(args, train_dataset, model, tokenizer):
""" Train the model """
args.train_batch_size = args.per_gpu_train_batch_size * max(1, args.n_gpu)
train_sampler = RandomSampler(train_dataset)
train_dataloader = DataLoader(train_dataset,
sampler=train_sampler,
batch_size=args.train_batch_size)
if args.max_steps > 0:
t_total = args.max_steps
args.num_train_epochs = args.max_steps // (
len(train_dataloader) // args.gradient_accumulation_steps) + 1
else:
t_total = len(
train_dataloader
) // args.gradient_accumulation_steps * args.num_train_epochs
# Prepare optimizer and schedule (linear warmup and decay)
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
args.weight_decay
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=args.warmup_steps,
t_total=t_total)
# multi-gpu training (should be after apex fp16 initialization)
if args.n_gpu > 1:
model = torch.nn.DataParallel(model)
# Train!
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_dataset))
logger.info(" Num Epochs = %d", args.num_train_epochs)
logger.info(" Instantaneous batch size per GPU = %d",
args.per_gpu_train_batch_size)
logger.info(" Gradient Accumulation steps = %d",
args.gradient_accumulation_steps)
logger.info(" Total optimization steps = %d", t_total)
global_step = 0
tr_loss, logging_loss = 0.0, 0.0
model.zero_grad()
train_iterator = trange(int(args.num_train_epochs), desc="Epoch")
set_seed(
args) # Added here for reproductibility (even between python 2 and 3)
for _ in train_iterator:
epoch_iterator = tqdm(train_dataloader, desc="Iteration")
for step, batch in enumerate(epoch_iterator):
model.train()
batch = tuple(t.to(args.device) for t in batch)
inputs = {
'input_ids': batch[0],
'attention_mask': batch[1],
'align_mask': batch[2],
'labels': batch[4]
}
inputs['token_type_ids'] = batch[3]
outputs = model(**inputs)
loss = outputs[
0] # model outputs are always tuple in transformers (see doc)
if args.n_gpu > 1:
loss = loss.mean(
) # mean() to average on multi-gpu parallel training
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
tr_loss += loss.item()
if (step + 1) % args.gradient_accumulation_steps == 0:
optimizer.step()
scheduler.step() # Update learning rate schedule
model.zero_grad()
global_step += 1
if args.logging_steps > 0 and global_step % args.logging_steps == 0:
if args.evaluate_during_training:
results = evaluate(args, model, tokenizer)
for key, value in results.items():
with open(
os.path.join(args.output_dir,
"{}.txt".format(key)),
'a+') as w:
w.write("%d\t%f\n" % (global_step, value))
with open(os.path.join(args.output_dir, "loss.txt"),
'a+') as w:
w.write(
"%d\t%f\n" %
(global_step,
(tr_loss - logging_loss) / args.logging_steps))
logging_loss = tr_loss
if args.save_steps > 0 and global_step % args.save_steps == 0:
# Save model checkpoint
output_dir = os.path.join(
args.output_dir, 'checkpoint-{}'.format(global_step))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
model_to_save = model.module if hasattr(
model, 'module'
) else model # Take care of distributed/parallel training
model_to_save.save_pretrained(output_dir)
torch.save(args,
os.path.join(output_dir, 'training_args.bin'))
logger.info("Saving model checkpoint to %s", output_dir)
if args.max_steps > 0 and global_step > args.max_steps:
epoch_iterator.close()
break
if args.max_steps > 0 and global_step > args.max_steps:
train_iterator.close()
break
return global_step, tr_loss / global_step
def main():
parser = argparse.ArgumentParser()
# Required parameters
parser.add_argument(
"--output_dir",
default='output',
type=str,
help=
"The output directory where the model checkpoints and predictions will be written."
)
parser.add_argument("--checkpoint",
default='pretrain_ckpt/bert_small_ckpt.bin',
type=str,
help="checkpoint")
parser.add_argument("--model_config",
default='data/bert_small.json',
type=str)
# Other parameters
parser.add_argument("--train_file",
default='data/KorQuAD_v1.0_train.json',
type=str,
help="SQuAD json for training. E.g., train-v1.1.json")
parser.add_argument(
"--max_seq_length",
default=512,
type=int,
help=
"The maximum total input sequence length after WordPiece tokenization. Sequences "
"longer than this will be truncated, and sequences shorter than this will be padded."
)
parser.add_argument(
"--doc_stride",
default=128,
type=int,
help=
"When splitting up a long document into chunks, how much stride to take between chunks."
)
parser.add_argument(
"--max_query_length",
default=96,
type=int,
help=
"The maximum number of tokens for the question. Questions longer than this will "
"be truncated to this length.")
parser.add_argument("--train_batch_size",
default=32,
type=int,
help="Total batch size for training.")
parser.add_argument("--learning_rate",
default=5e-5,
type=float,
help="The initial learning rate for Adam.")
parser.add_argument("--num_train_epochs",
default=8.0,
type=float,
help="Total number of training epochs to perform.")
parser.add_argument("--max_grad_norm",
default=1.0,
type=float,
help="Max gradient norm.")
parser.add_argument("--adam_epsilon",
default=1e-6,
type=float,
help="Epsilon for Adam optimizer.")
parser.add_argument(
"--warmup_proportion",
default=0.1,
type=float,
help=
"Proportion of training to perform linear learning rate warmup for. E.g., 0.1 = 10%% "
"of training.")
parser.add_argument(
"--n_best_size",
default=20,
type=int,
help=
"The total number of n-best predictions to generate in the nbest_predictions.json "
"output file.")
parser.add_argument(
"--max_answer_length",
default=30,
type=int,
help=
"The maximum length of an answer that can be generated. This is needed because the start "
"and end predictions are not conditioned on one another.")
parser.add_argument(
"--verbose_logging",
action='store_true',
help=
"If true, all of the warnings related to data processing will be printed. "
"A number of warnings are expected for a normal SQuAD evaluation.")
parser.add_argument("--no_cuda",
action='store_true',
help="Whether not to use CUDA when available")
parser.add_argument('--seed',
type=int,
default=42,
help="random seed for initialization")
parser.add_argument(
'--fp16',
action='store_true',
help="Whether to use 16-bit float precision instead of 32-bit")
parser.add_argument(
'--fp16_opt_level',
type=str,
default='O2',
help=
"For fp16: Apex AMP optimization level selected in ['O0', 'O1', 'O2', and 'O3']."
"See details at https://nvidia.github.io/apex/amp.html")
parser.add_argument(
'--null_score_diff_threshold',
type=float,
default=0.0,
help=
"If null_score - best_non_null is greater than the threshold predict null."
)
args = parser.parse_args()
device = torch.device(
"cuda" if torch.cuda.is_available() and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
logger.info("device: {} n_gpu: {}, 16-bits training: {}".format(
device, n_gpu, args.fp16))
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 not os.path.exists(args.output_dir):
os.makedirs(args.output_dir)
tokenizer = BertTokenizer('data/ko_vocab_32k.txt',
max_len=args.max_seq_length,
do_basic_tokenize=True)
# Prepare model
config = Config.from_json_file(args.model_config)
model = QuestionAnswering(config)
model.bert.load_state_dict(torch.load(args.checkpoint))
num_params = count_parameters(model)
logger.info("Total Parameter: %d" % num_params)
model.to(device)
model = torch.nn.DataParallel(model)
cached_train_features_file = args.train_file + '_{0}_{1}_{2}'.format(
str(args.max_seq_length), str(args.doc_stride),
str(args.max_query_length))
train_examples = read_squad_examples(input_file=args.train_file,
is_training=True,
version_2_with_negative=False)
try:
with open(cached_train_features_file, "rb") as reader:
train_features = pickle.load(reader)
except:
train_features = convert_examples_to_features(
examples=train_examples,
tokenizer=tokenizer,
max_seq_length=args.max_seq_length,
doc_stride=args.doc_stride,
max_query_length=args.max_query_length,
is_training=True)
logger.info(" Saving train features into cached file %s",
cached_train_features_file)
with open(cached_train_features_file, "wb") as writer:
pickle.dump(train_features, writer)
num_train_optimization_steps = int(
len(train_features) / args.train_batch_size) * args.num_train_epochs
# Prepare optimizer
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params':
[p for n, p in param_optimizer if not any(nd in n for nd in no_decay)],
'weight_decay':
0.01
}, {
'params':
[p for n, p in param_optimizer if any(nd in n for nd in no_decay)],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(
optimizer,
warmup_steps=num_train_optimization_steps * 0.1,
t_total=num_train_optimization_steps)
if args.fp16:
try:
from apex import amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use distributed and fp16 training."
)
model, optimizer = amp.initialize(model,
optimizer,
opt_level=args.fp16_opt_level)
logger.info("***** Running training *****")
logger.info(" Num orig examples = %d", len(train_examples))
logger.info(" Num split examples = %d", len(train_features))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
num_train_step = num_train_optimization_steps
input_ids = np.load('input_ids2.npy')
input_mask = np.load('input_mask.npy')
input_segments = np.load('input_segments.npy')
start_prob = np.load('start_prob.npy')
end_prob = np.load('end_prob.npy')
start_label = np.load('input_start.npy')
stop_label = np.load('input_stop.npy')
"""
for i in range(1000):
print(input_ids[i])
print(max(start_prob[i]))
print(sum(start_prob[i]))
input()
"""
paragraph = torch.tensor(input_ids.astype(
np.int64)).type(dtype=torch.long).cuda()
paragraph_mask = torch.tensor(input_mask.astype(
np.int64)).type(dtype=torch.long).cuda()
paragraph_segments = torch.tensor(input_segments.astype(
np.int64)).type(dtype=torch.long).cuda()
start_prob = torch.tensor(start_prob.astype(
np.float32)).type(dtype=torch.float32).cuda()
end_prob = torch.tensor(end_prob.astype(
np.float32)).type(dtype=torch.float32).cuda()
start_label = torch.tensor(start_label.astype(
np.int64)).type(dtype=torch.long).cuda()
stop_label = torch.tensor(stop_label.astype(
np.int64)).type(dtype=torch.long).cuda()
train_data = TensorDataset(paragraph, paragraph_mask, paragraph_segments,
start_label, stop_label, start_prob, end_prob)
train_sampler = RandomSampler(train_data)
train_dataloader = DataLoader(train_data,
sampler=train_sampler,
batch_size=args.train_batch_size)
model.train()
global_step = 0
epoch = 0
for _ in trange(int(args.num_train_epochs), desc="Epoch"):
iter_bar = tqdm(
train_dataloader,
desc="Train(XX Epoch) Step(XX/XX) (Mean loss=X.X) (loss=X.X)")
tr_step, total_loss, mean_loss = 0, 0., 0.
for step, batch in enumerate(iter_bar):
if n_gpu == 1:
batch = tuple(
t.to(device)
for t in batch) # multi-gpu does scattering it-self
input_ids, input_mask, segment_ids, start_positions, end_positions, start_probs, end_probs = batch
loss = model(input_ids, segment_ids, input_mask, start_positions,
end_positions, start_probs, end_probs)
if n_gpu > 1:
loss = loss.mean() # mean() to average on multi-gpu.
if args.fp16:
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
torch.nn.utils.clip_grad_norm_(amp.master_params(optimizer),
args.max_grad_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
scheduler.step()
optimizer.step()
optimizer.zero_grad()
global_step += 1
tr_step += 1
total_loss += loss
mean_loss = total_loss / tr_step
iter_bar.set_description(
"Train Step(%d / %d) (Mean loss=%5.5f) (loss=%5.5f)" %
(global_step, num_train_step, mean_loss, loss.item()))
logger.info("** ** * Saving file * ** **")
model_checkpoint = "korquad_%d.bin" % (epoch)
logger.info(model_checkpoint)
output_model_file = os.path.join(args.output_dir, model_checkpoint)
if n_gpu > 1:
torch.save(model.module.state_dict(), output_model_file)
else:
torch.save(model.state_dict(), output_model_file)
epoch += 1
def main(args):
if args.server_ip and args.server_port:
# Distant debugging - see https://code.visualstudio.com/docs/python/debugging#_attach-to-a-local-script
import ptvsd
logger.info("Waiting for debugger attach")
ptvsd.enable_attach(address=(args.server_ip, args.server_port),
redirect_output=True)
ptvsd.wait_for_attach()
args.data_dir = os.path.join(args.data_dir, args.task_name)
args.output_dir = os.path.join(args.output_dir, args.task_name)
logger.info("args = %s", args)
processors = {
"cola": ColaProcessor,
"mnli": MnliProcessor,
"mrpc": MrpcProcessor,
"sst-2": Sst2Processor,
"sts-b": StsbProcessor,
"qqp": QqpProcessor,
"qnli": QnliProcessor,
"rte": RteProcessor,
"wnli": WnliProcessor,
}
output_modes = {
"cola": "classification",
"mnli": "classification",
"mrpc": "classification",
"sst-2": "classification",
"sts-b": "regression",
"qqp": "classification",
"qnli": "classification",
"rte": "classification",
"wnli": "classification",
}
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:
torch.cuda.set_device(args.local_rank)
device = torch.device("cuda", args.local_rank)
n_gpu = 1
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
torch.distributed.init_process_group(backend='nccl')
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 = args.train_batch_size // args.gradient_accumulation_steps
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 not args.do_train and not args.do_eval:
raise ValueError(
"At least one of `do_train` or `do_eval` must be True.")
if os.path.exists(args.output_dir) and os.listdir(
args.output_dir) and args.do_train:
logger.info("Output directory already exists and is not empty.")
if not os.path.exists(args.output_dir):
try:
os.makedirs(args.output_dir)
except:
logger.info("catch a error")
task_name = args.task_name.lower()
if task_name not in processors:
raise ValueError("Task not found: %s" % (task_name))
processor = processors[task_name]()
output_mode = output_modes[task_name]
label_list = processor.get_labels()
num_labels = len(label_list)
# use bert to aug train_examples
ori_train_examples = processor.get_train_examples(args.data_dir)
eval_examples = processor.get_dev_examples(args.data_dir)
test_examples = processor.get_test_examples(args.data_dir)
if args.double_ori == 0:
num_train_optimization_steps = int(
len(ori_train_examples) / args.train_batch_size /
args.gradient_accumulation_steps) * args.num_train_epochs
else:
num_train_optimization_steps = int(
len(ori_train_examples) * 2 / args.train_batch_size /
args.gradient_accumulation_steps) * args.num_train_epochs
if args.local_rank != -1:
num_train_optimization_steps = num_train_optimization_steps // torch.distributed.get_world_size(
)
config_class, tokenizer_class = (RobertaConfig, RobertaTokenizer)
tokenizer = tokenizer_class.from_pretrained(
args.tokenizer_name
if args.tokenizer_name else args.model_name_or_path,
do_lower_case=args.do_lower_case,
cache_dir=args.cache_dir if args.cache_dir else None)
if args.use_saved == 1:
bert_saved_dir = args.ckpt
if args.co_training:
model_class = RobertaForNSP_co
model = model_class.from_pretrained(bert_saved_dir, args=args)
elif args.only_bert:
model_class = RobertaForSequenceClassification
model = model_class.from_pretrained(bert_saved_dir)
tokenizer = tokenizer_class.from_pretrained(bert_saved_dir)
else:
model_class = RobertaForNSPAug
model = model_class.from_pretrained(bert_saved_dir, args=args)
else:
config = config_class.from_pretrained(
args.config_name if args.config_name else args.model_name_or_path,
num_labels=num_labels,
finetuning_task=task_name,
cache_dir=args.cache_dir if args.cache_dir else None)
if args.only_bert:
model_class = RobertaForSequenceClassification
model = model_class.from_pretrained(
args.model_name_or_path,
from_tf=bool('.ckpt' in args.model_name_or_path),
config=config,
cache_dir=args.cache_dir if args.cache_dir else None)
else:
model_class = RobertaForNSPAug
model = model_class.from_pretrained(
args.model_name_or_path,
from_tf=bool('.ckpt' in args.model_name_or_path),
config=config,
cache_dir=args.cache_dir if args.cache_dir else None,
args=args)
model.cuda()
if n_gpu > 1:
model = torch.nn.DataParallel(model)
cnt = np.sum(np.prod(v.size())
for name, v in model.named_parameters()) / 1e6
logger.info("cnt %s", str(cnt))
if args.do_first_eval:
args.do_train = False
res_file = os.path.join(args.output_dir, "first_test.tsv")
eval_loss, eval_seq_loss, eval_aug_loss, eval_res, eval_aug_accuracy, res_parts = \
do_evaluate(args, processor, label_list, tokenizer, model, 0, output_mode, num_labels, task_name,
eval_examples, type="dev")
eval_res.update(res_parts)
for key in sorted(eval_res.keys()):
logger.info("first evaluation: %s = %s", key, str(eval_res[key]))
idx, preds = do_test(args, label_list, task_name, processor, tokenizer,
output_mode, model)
dataframe = pd.DataFrame({'index': range(idx), 'prediction': preds})
dataframe.to_csv(res_file, index=False, sep='\t')
logger.info(" Num test length = %d", idx)
logger.info(" Done ")
# write mm test results
if task_name == "mnli":
res_file = os.path.join(args.output_dir, "first_test_mm.tsv")
idx, preds = do_test(args,
label_list,
task_name,
processor,
tokenizer,
output_mode,
model,
do_mm=True)
dataframe = pd.DataFrame({
'index': range(idx),
'prediction': preds
})
dataframe.to_csv(res_file, index=False, sep='\t')
logger.info(" Num test length = %d", idx)
logger.info(" Done write mm")
if args.do_train:
# Prepare optimizer
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
args.weight_decay
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = get_linear_schedule_with_warmup(
optimizer,
num_warmup_steps=int(args.warmup_rate *
num_train_optimization_steps),
num_training_steps=num_train_optimization_steps)
global_step = 0
best_val_acc = 0.0
first_time = time.time()
logger.info("***** Running training *****")
logger.info(" Num original examples = %d", len(ori_train_examples))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
model.train()
aug_ratio = 0.0
aug_seed = np.random.randint(0, 1000)
for epoch in range(int(args.num_train_epochs)):
if args.only_bert:
train_features = convert_examples_to_features(
ori_train_examples,
label_list,
args.max_seq_length,
tokenizer,
num_show=args.num_show,
output_mode=output_mode,
args=args,
pad_token=tokenizer.convert_tokens_to_ids(
[tokenizer.pad_token])[0],
do_roberta=1)
else:
logger.info("epoch=%d, aug_ratio = %f, aug_seed=%d", epoch,
aug_ratio, aug_seed)
train_examples = Aug_each_ckpt(
ori_train_examples,
label_list,
model,
tokenizer,
args=args,
num_show=args.num_show,
output_mode=output_mode,
seed=aug_seed,
aug_ratio=aug_ratio,
use_bert=False,
do_roberta=1,
ssa_roberta=1,
pad_token=tokenizer.convert_tokens_to_ids(
[tokenizer.pad_token])[0])
if aug_ratio + args.aug_ratio_each < 1.0:
aug_ratio += args.aug_ratio_each
aug_seed += 1
train_features = convert_examples_to_features(
train_examples,
label_list,
args.max_seq_length,
tokenizer,
num_show=args.num_show,
output_mode=output_mode,
args=args,
pad_token=tokenizer.convert_tokens_to_ids(
[tokenizer.pad_token])[0],
do_roberta=1)
logger.info("Done convert features")
all_input_ids = torch.tensor([f.input_ids for f in train_features],
dtype=torch.long)
all_input_mask = torch.tensor(
[f.input_mask for f in train_features], dtype=torch.long)
all_segment_ids = torch.tensor(
[f.segment_ids for f in train_features], dtype=torch.long)
if output_mode == "classification":
all_label_ids = torch.tensor(
[f.label_id for f in train_features], dtype=torch.long)
elif output_mode == "regression":
all_label_ids = torch.tensor(
[f.label_id for f in train_features], dtype=torch.float)
token_real_label = torch.tensor(
[f.token_real_label for f in train_features], dtype=torch.long)
train_data = TensorDataset(all_input_ids, all_input_mask,
all_segment_ids, all_label_ids,
token_real_label)
if args.local_rank == -1:
train_sampler = RandomSampler(train_data)
else:
train_sampler = DistributedSampler(train_data)
train_dataloader = DataLoader(train_data,
sampler=train_sampler,
batch_size=args.train_batch_size)
logger.info("begin training")
tr_loss, tr_seq_loss, tr_aug_loss, train_seq_accuracy, train_aug_accuracy = 0, 0, 0, 0, 0
nb_tr_examples, nb_tr_steps, nb_tr_tokens = 0, 0, 0
preds = []
all_labels = []
for step, batch in enumerate(train_dataloader):
batch = tuple(t.cuda() for t in batch)
input_ids, input_mask, segment_ids, label_ids, token_real_label = batch
if args.only_bert:
outputs = model(input_ids, input_mask)
seq_logits = outputs[0]
else:
seq_logits, aug_logits, aug_loss = model(
input_ids,
input_mask,
labels=None,
token_real_label=token_real_label)
if output_mode == "classification":
loss_fct = CrossEntropyLoss()
seq_loss = loss_fct(seq_logits.view(-1, num_labels),
label_ids.view(-1))
elif output_mode == "regression":
loss_fct = MSELoss()
seq_loss = loss_fct(seq_logits.view(-1),
label_ids.view(-1))
token_real_label = token_real_label.detach().cpu().numpy()
w = args.aug_loss_weight
if args.only_bert:
loss = seq_loss
else:
loss = (1 - w) * seq_loss + w * aug_loss
if n_gpu > 1:
loss = loss.mean() # mean() to average on multi-gpu.
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
loss.backward()
total_norm = torch.nn.utils.clip_grad_norm_(
model.parameters(), 10000.0)
tr_loss += loss.item()
nb_tr_examples += input_ids.size(0)
nb_tr_steps += 1
tr_seq_loss += seq_loss.mean().item()
seq_logits = seq_logits.detach().cpu().numpy()
label_ids = label_ids.detach().cpu().numpy()
if len(preds) == 0:
preds.append(seq_logits)
all_labels.append(label_ids)
else:
preds[0] = np.append(preds[0], seq_logits, axis=0)
all_labels[0] = np.append(all_labels[0], label_ids, axis=0)
if args.only_bert == 0:
aug_logits = aug_logits.detach().cpu().numpy()
tmp_train_aug_accuracy, tmp_tokens = accuracy(
aug_logits, token_real_label, type="aug")
train_aug_accuracy += tmp_train_aug_accuracy
nb_tr_tokens += tmp_tokens
tr_aug_loss += aug_loss.mean().item()
if global_step % 20 == 0:
loss = tr_loss / nb_tr_steps
seq_loss = tr_seq_loss / nb_tr_steps
aug_loss = tr_aug_loss / nb_tr_steps
tmp_pred = preds[0]
tmp_labels = all_labels[0]
if output_mode == "classification":
tmp_pred = np.argmax(tmp_pred, axis=1)
elif output_mode == "regression":
tmp_pred = np.squeeze(tmp_pred)
res = accuracy(tmp_pred, tmp_labels, task_name=task_name)
if nb_tr_tokens != 0:
aug_avg = train_aug_accuracy / nb_tr_tokens
else:
aug_avg = 0.0
log_string = ""
log_string += "epoch={:<5d}".format(epoch)
log_string += " step={:<9d}".format(global_step)
log_string += " total_loss={:<9.7f}".format(loss)
log_string += " seq_loss={:<9.7f}".format(seq_loss)
log_string += " aug_loss={:<9.7f}".format(aug_loss)
log_string += " lr={:<9.7f}".format(scheduler.get_lr()[0])
log_string += " |g|={:<9.7f}".format(total_norm)
#log_string += " tr_seq_acc={:<9.7f}".format(seq_avg)
log_string += " tr_aug_acc={:<9.7f}".format(aug_avg)
log_string += " mins={:<9.2f}".format(
float(time.time() - first_time) / 60)
for key in sorted(res.keys()):
log_string += " " + key + "= " + str(res[key])
logger.info(log_string)
if (step + 1) % args.gradient_accumulation_steps == 0:
optimizer.step()
scheduler.step() # Update learning rate schedule
optimizer.zero_grad()
global_step += 1
train_loss = tr_loss / nb_tr_steps
if args.do_eval and (args.local_rank == -1
or torch.distributed.get_rank()
== 0) and epoch % 1 == 0:
eval_loss, eval_seq_loss, eval_aug_loss, eval_res, eval_aug_accuracy, res_parts = \
do_evaluate(args, processor, label_list, tokenizer, model, epoch, output_mode, num_labels, task_name, eval_examples, type="dev")
if "acc" in eval_res:
tmp_acc = eval_res["acc"]
elif "mcc" in eval_res:
tmp_acc = eval_res["mcc"]
else:
tmp_acc = eval_res["corr"]
if tmp_acc >= best_val_acc:
best_val_acc = tmp_acc
dev_test = "dev"
model_to_save = model.module if hasattr(
model,
'module') else model # Only save the model it-self
output_model_dir = os.path.join(args.output_dir,
"dev_" + str(tmp_acc))
if not os.path.exists(output_model_dir):
os.makedirs(output_model_dir)
model_to_save.save_pretrained(output_model_dir)
tokenizer.save_pretrained(output_model_dir)
output_model_file = os.path.join(output_model_dir,
'pytorch_model.bin')
torch.save(model_to_save.state_dict(), output_model_file)
result = {
'eval_total_loss': eval_loss,
'eval_seq_loss': eval_seq_loss,
'eval_aug_loss': eval_aug_loss,
'eval_aug_accuracy': eval_aug_accuracy,
'global_step': global_step,
'train_loss': train_loss,
'best_epoch': epoch,
'train_batch_size': args.train_batch_size,
'args': args
}
result.update(eval_res)
result.update(res_parts)
output_eval_file = os.path.join(
args.output_dir,
dev_test + "_results_" + str(tmp_acc) + ".txt")
with open(output_eval_file, "w") as writer:
logger.info("***** Test results *****")
for key in sorted(result.keys()):
logger.info(" %s = %s", key, str(result[key]))
writer.write("%s = %s\n" % (key, str(result[key])))
# write test results
if args.do_test:
res_file = os.path.join(
args.output_dir, "test_" + str(tmp_acc) + ".tsv")
idx, preds = do_test(args, label_list, task_name,
processor, tokenizer, output_mode,
model)
dataframe = pd.DataFrame({
'index': range(idx),
'prediction': preds
})
dataframe.to_csv(res_file, index=False, sep='\t')
logger.info(" Num test length = %d", idx)
logger.info(" Done ")
# write mm test results
if task_name == "mnli":
res_file = os.path.join(
args.output_dir, "mm_roberta_results_b_" +
str(tmp_acc) + ".tsv")
idx, preds = do_test(args,
label_list,
task_name,
processor,
tokenizer,
output_mode,
do_mm=True)
dataframe = pd.DataFrame({
'index': range(idx),
'prediction': preds
})
dataframe.to_csv(res_file, index=False, sep='\t')
logger.info(" Num test length = %d", idx)
logger.info(" Done write mm")
else:
logger.info(" tmp_val_acc = %f", tmp_acc)
def train(self):
from datetime import datetime
current_time = datetime.now().strftime('%b%d_%H-%M-%S')
task = self.args.task
tb_writer = SummaryWriter(log_dir='./runs/' + task + "/" +
current_time + self.args.prefix,
comment=self.args.prefix)
vocabs, lexical_mapping = self._build_model()
train_data = DataLoader(self.args,
vocabs,
lexical_mapping,
self.args.train_data,
self.args.batch_size,
for_train=True)
dev_data = DataLoader(self.args,
vocabs,
lexical_mapping,
self.args.dev_data,
self.args.batch_size,
for_train=False)
test_data = DataLoader(self.args,
vocabs,
lexical_mapping,
self.args.test_data,
self.args.batch_size,
for_train='Eval')
train_data.set_unk_rate(self.args.unk_rate)
# WRITE PARAMETERS
with open('./' + 'param' + '.txt', 'w') as f:
for name, param in self.model.named_parameters():
f.writelines('name:' + name + "\n")
f.writelines(str(param))
f.writelines('size:' + str(param.size()) + '\n')
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in self.model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
0.
}, {
'params': [
p for n, p in self.model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
gradient_accumulation_steps = 1
t_total = len(
train_data) // gradient_accumulation_steps * self.args.epochs
optimizer = AdamW(optimizer_grouped_parameters,
lr=self.args.lr,
eps=self.args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=self.args.warmup_steps,
t_total=t_total)
self.model.zero_grad()
set_seed(42, self.args.gpus)
batches_acm, loss_acm = 0, 0
# Train!
logger.info("***** Running training *****")
logger.info(" Task: %s", self.args.task)
logger.info(" Num examples = %d", len(train_data))
logger.info(" Num Epochs = %d", self.args.epochs)
logger.info(" Total optimization steps = %d", t_total)
logger.info(" Running Language Model = %s", self.args.lm_model)
logger.info(" Running Model = %s", self.args.encoder_type)
best_acc = 0
best_model_wts = copy.deepcopy(self.model.state_dict())
total_steps = 0
train_iterator = trange(int(self.args.epochs), desc="Epoch")
# initialize the early_stopping object
early_stopping = EarlyStopping(patience=self.args.patience,
verbose=True)
for _ in train_iterator:
epoch_iterator = tqdm(train_data, desc="Iteration")
running_loss = 0.0
running_corrects = 0
batch_count = self.args.batch_multiplier
# Turn on the train mode
for step, batch in enumerate(epoch_iterator):
self.model.train()
batch = move_to_cuda(batch, self.device)
logits, labels, ans_ids = self.model(batch, train=True)
logits_for_pred = logits.clone().detach()
loss = self.criterion(logits, labels)
loss_value = loss.item()
pred_values, pred_indices = torch.max(logits_for_pred, 1)
labels = labels.tolist()
pred = pred_indices.tolist()
corrects = [i for i, j in zip(labels, pred) if i == j]
# Statistics
running_loss += loss.item()
running_corrects += len(corrects)
if batch_count == 0:
torch.nn.utils.clip_grad_norm_(self.model.parameters(),
1.0)
optimizer.step()
scheduler.step()
total_steps += 1
optimizer.zero_grad()
self.model.zero_grad()
batch_count = self.args.batch_multiplier
loss_acm += loss_value
loss.backward()
batch_count -= 1
if (batches_acm %
(self.args.batch_multiplier * self.args.batch_size)
== 0) & (batches_acm != 0) & (step != 0):
logger.info(
'Train Epoch %d, Batch %d, loss %.3f, Accuracy %.3f',
_, batches_acm, loss_acm / batches_acm,
running_corrects / (self.args.batch_size * step))
tb_writer.add_scalar('Training_loss',
loss_acm / batches_acm, batches_acm)
tb_writer.add_scalar(
'Training_Accuracy',
running_corrects / (self.args.batch_size * step))
torch.cuda.empty_cache()
batches_acm += 1
epoch_loss = running_loss / batches_acm
epoch_acc = running_corrects / len(train_data)
print('{} Loss: {:.4f} Acc: {:.4f}'.format(_, epoch_loss,
epoch_acc))
tb_writer.add_scalar('Training_Epoch_loss', epoch_loss, _)
tb_writer.add_scalar('Training_Epoch_Accuracy', epoch_acc, _)
# Evaluate on Development Set
eval_epoch_acc, eval_epoch_loss = self._run_evaluate(
dev_data, _, write_answer=False)
print('Overall_Dev Acc: {:.4f}'.format(eval_epoch_acc))
tb_writer.add_scalar('Dev_Epoch_Accuracy', eval_epoch_acc, _)
##################################
# Evaluate on Test Set
test_epoch_acc, test_epoch_loss = self._run_evaluate(
test_data, _, write_answer=True)
print('Overall_Test Acc: {:.4f}'.format(test_epoch_acc))
tb_writer.add_scalar('Test_Epoch_Accuracy', test_epoch_acc, _)
# Save only best accuracy model on dev set
if eval_epoch_acc > best_acc:
best_acc = eval_epoch_acc
best_model_wts = copy.deepcopy(self.model.state_dict())
# early_stopping needs the validation loss to check if it has decresed,
# and if it has, it will make a checkpoint of the current model
early_stopping(epoch_acc, self.model)
if early_stopping.early_stop:
print("Early stopping")
break
self.model.train()
logger.info('Best val Acc: {:4f}'.format(best_acc))
torch.save(
{
'args': self.save_args,
'model': best_model_wts
}, '%s/epoch%d_batch%d_model_best_%s' %
(self.args.ckpt, self.args.epochs, batches_acm, self.args.prefix))
def main():
parser = argparse.ArgumentParser()
# Required Parameters
parser.add_argument(
"--output_dir",
default='output',
type=str,
help=
"The output directory where the model checkpoints and predictions will be written."
)
parser.add_argument("--checkpoint",
default='pretrain_ckpt/bert_small_ckpt.bin',
type=str,
help="checkpoint")
parser.add_argument("--resume_checkpoint",
default=False,
type=bool,
help="resume")
parser.add_argument('--log_dir', default='./runs', type=str)
# Other Parameters
parser.add_argument("--train_feature",
default='./rsc/train_features.hdf5',
type=str,
help="SQuAD corpus for post-training.")
parser.add_argument("--train_batch_size",
default=16,
type=int,
help="Total batch size for training.")
parser.add_argument("--learning_rate",
default=5e-5,
type=float,
help="The initial learning rate for Adam.")
parser.add_argument("--num_train_epochs",
default=4.0,
type=float,
help="Total number of training epochs to perform.")
parser.add_argument("--max_grad_norm",
default=1.0,
type=float,
help="Max gradient norm.")
parser.add_argument("--adam_epsilon",
default=1e-6,
type=float,
help="Epsilon for Adam optimizer.")
parser.add_argument(
"--warmup_proportion",
default=0.1,
type=float,
help=
"Proportion of training to perform linear learning rate warmup for. E.g., 0.1 = 10%% "
"of training.")
parser.add_argument("--num_workers",
default=8,
type=int,
help="Proportion of workers of DataLoader")
parser.add_argument("--no_cuda",
action='store_true',
help="Whether not to use CUDA when available")
parser.add_argument('--seed',
type=int,
default=42,
help="random seed for initialization")
parser.add_argument(
'--fp16',
action='store_true',
help="Whether to use 16-bit float precision instead of 32-bit")
parser.add_argument(
'--fp16_opt_level',
type=str,
default='O2',
help=
"For fp16: Apex AMP optimization level selected in ['O0', 'O1', 'O2', and 'O3']."
"See details at https://nvidia.github.io/apex/amp.html")
args = parser.parse_args()
summary_writer = SummaryWriter(args.log_dir)
device = torch.device(
"cuda" if torch.cuda.is_available() and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
logger.info("device: {} n_gpu: {}, 16-bits training: {}".format(
device, n_gpu, args.fp16))
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 not os.path.exists(args.output_dir):
os.makedirs(args.output_dir)
# Prepare model
model = SampleCNN()
# Multi-GPU Setting
# if n_gpu > 1:
# model = nn.DataParallel(model)
num_params = count_parameters(model)
logger.info("Total Parameter: %d" % num_params)
model.to(device)
post_training_dataset = SpeechDataset('./rsc/train.hdf5')
num_train_optimization_steps = int(
len(post_training_dataset) /
args.train_batch_size) * args.num_train_epochs
# Prepare optimizer
param_optimizer = list(model.named_parameters())
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params':
[p for n, p in param_optimizer if not any(nd in n for nd in no_decay)],
'weight_decay':
0.01
}, {
'params':
[p for n, p in param_optimizer if any(nd in n for nd in no_decay)],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(
optimizer,
warmup_steps=num_train_optimization_steps * 0.1,
t_total=num_train_optimization_steps)
loss_fn = nn.KLDivLoss(reduction='batchmean').to(device)
if args.fp16:
try:
from apex import amp
except ImportError:
raise ImportError(
"Please install apex from https://www.github.com/nvidia/apex to use distributed and fp16 training."
)
model, optimizer = amp.initialize(model,
optimizer,
opt_level=args.fp16_opt_level)
logger.info("***** Running training *****")
logger.info(" Num orig examples = %d", len(post_training_dataset))
logger.info(" Batch size = %d", args.train_batch_size)
logger.info(" Num steps = %d", num_train_optimization_steps)
num_train_step = num_train_optimization_steps
train_dataloader = DataLoader(post_training_dataset,
batch_size=args.train_batch_size,
num_workers=16,
pin_memory=True)
model.train()
global_step = 0
epoch = 0
for _ in trange(int(args.num_train_epochs), desc="Epoch"):
iter_bar = tqdm(
train_dataloader,
desc="Train(XX Epoch) Step(XX/XX) (Mean loss=X.X) (loss=X.X)")
tr_step, total_loss, mean_loss = 0, 0., 0.
for step, batch in enumerate(iter_bar):
feature = batch['feature'].float().to(device)
label = batch['label'].float().to(device)
output = model(feature)
# loss = -F.kl_div(output, label, reduction='batchmean')
loss = loss_fn(output, label)
# if n_gpu > 1:
# loss = loss.mean()
if args.fp16:
with amp.scale_loss(loss, optimizer) as scaled_loss:
scaled_loss.backward()
torch.nn.utils.clip_grad_norm_(amp.master_params(optimizer),
args.max_grad_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
optimizer.step()
scheduler.step()
optimizer.zero_grad()
global_step += 1
tr_step += 1
total_loss += loss
mean_loss = total_loss / tr_step
iter_bar.set_description(
"Train Step(%d / %d) (Mean loss=%5.5f) (loss=%5.5f)" %
(global_step, num_train_step, mean_loss, loss.item()))
if global_step % 100 == 0:
print('output ', output)
summary_writer.add_scalar('Train/Total_Mean_Loss', mean_loss,
global_step)
summary_writer.add_scalar('Train/Total_Loss', loss.item(),
global_step)
logger.info("***** Saving file *****")
if args.resume_checkpoint:
model_checkpoint = "pt_bert_from_checkpoint_%d.bin" % (epoch)
else:
model_checkpoint = "pt_scnn_%d.bin" % (epoch)
logger.info(model_checkpoint)
output_model_file = os.path.join(args.output_dir, model_checkpoint)
# if n_gpu > 1:
# torch.save(model.module.state_dict(), output_model_file)
# else:
torch.save(model.state_dict(), output_model_file)
epoch += 1
def train(args, train_dataset, model, tokenizer):
""" Train the model """
tb_writer = SummaryWriter()
args.train_batch_size = args.per_gpu_train_batch_size * max(1, args.n_gpu)
train_sampler = RandomSampler(train_dataset)
train_dataloader = DataLoader(train_dataset,
sampler=train_sampler,
batch_size=args.train_batch_size)
if args.max_steps > 0:
t_total = args.max_steps
args.num_train_epochs = args.max_steps // (
len(train_dataloader) // args.gradient_accumulation_steps) + 1
else:
t_total = len(
train_dataloader
) // args.gradient_accumulation_steps * args.num_train_epochs
warm_up_steps = int(args.warmup_steps * t_total)
save_steps = int(args.save_steps * t_total)
# Prepare optimizer and schedule (linear warmup and decay)
no_decay = ['bias', 'LayerNorm.weight']
optimizer_grouped_parameters = [{
'params': [
p for n, p in model.named_parameters()
if not any(nd in n for nd in no_decay)
],
'weight_decay':
args.weight_decay
}, {
'params': [
p for n, p in model.named_parameters()
if any(nd in n for nd in no_decay)
],
'weight_decay':
0.0
}]
optimizer = AdamW(optimizer_grouped_parameters,
lr=args.learning_rate,
eps=args.adam_epsilon)
scheduler = WarmupLinearSchedule(optimizer,
warmup_steps=warm_up_steps,
t_total=t_total)
# multi-gpu training (should be after apex fp16 initialization)
if args.n_gpu > 1:
model = torch.nn.DataParallel(model)
# Train!
logger.info("***** Running training *****")
logger.info(" Num examples = %d", len(train_dataset))
logger.info(" Num Epochs = %d", args.num_train_epochs)
logger.info(" Instantaneous batch size per GPU = %d",
args.per_gpu_train_batch_size)
logger.info(
" Total train batch size (w. parallel, distributed & accumulation) = %d",
args.train_batch_size * args.gradient_accumulation_steps)
logger.info(" Gradient Accumulation steps = %d",
args.gradient_accumulation_steps)
logger.info(" Total optimization steps = %d", t_total)
global_step = 0
tr_loss, logging_loss = 0.0, 0.0
model.zero_grad()
train_iterator = trange(int(args.num_train_epochs), desc="Epoch")
set_seed(
args) # Added here for reproductibility (even between python 2 and 3)
for _ in train_iterator:
epoch_iterator = tqdm(train_dataloader, desc="Iteration")
for step, batch in enumerate(epoch_iterator):
model.train()
batch = tuple(t.to(args.device) for t in batch)
inputs = {
'input_ids': batch[0],
'attention_mask': batch[1],
'labels': batch[3]
}
inputs[
'token_type_ids'] = None # XLM, DistilBERT and RoBERTa don't use segment_ids
outputs = model(**inputs)
loss = outputs[0]
label_ids = torch.nn.functional.one_hot(batch[3]).float()
tsa_start = 0.5
tsa_threshold = get_tsa_threshold("exp_schedule",
global_step,
t_total,
tsa_start,
end=1)
larger_than_threshold = torch.exp(-loss) > tsa_threshold
loss_mask = torch.ones_like(label_ids) * (
1 - larger_than_threshold.float())
loss = torch.sum(loss * loss_mask) / torch.max(
torch.sum(loss_mask),
torch.tensor(1.0).cuda())
if args.n_gpu > 1:
loss = loss.mean(
) # mean() to average on multi-gpu parallel training
if args.gradient_accumulation_steps > 1:
loss = loss / args.gradient_accumulation_steps
loss.backward()
tr_loss += loss.item()
if (step + 1) % args.gradient_accumulation_steps == 0:
torch.nn.utils.clip_grad_norm_(model.parameters(),
args.max_grad_norm)
optimizer.step()
scheduler.step() # Update learning rate schedule
model.zero_grad()
global_step += 1
if args.logging_steps > 0 and global_step % args.logging_steps == 0:
# Log metrics
tb_writer.add_scalar('lr',
scheduler.get_lr()[0], global_step)
tb_writer.add_scalar('loss', (tr_loss - logging_loss) /
args.logging_steps, global_step)
logging_loss = tr_loss
if save_steps > 0 and global_step % save_steps == 0:
# Save model checkpoint
if args.evaluate_during_training: # Only evaluate when single GPU otherwise metrics may not average well
results = evaluate(args, model, tokenizer)
for key, value in results.items():
tb_writer.add_scalar('eval_{}'.format(key), value,
global_step)
output_dir = os.path.join(
args.output_dir, 'checkpoint-{}'.format(global_step))
if not os.path.exists(output_dir):
os.makedirs(output_dir)
model_to_save = model.module if hasattr(
model, 'module'
) else model # Take care of distributed/parallel training
model_to_save.save_pretrained(output_dir)
torch.save(args,
os.path.join(output_dir, 'training_args.bin'))
logger.info("Saving model checkpoint to %s", output_dir)
if args.max_steps > 0 and global_step > args.max_steps:
epoch_iterator.close()
break
if args.max_steps > 0 and global_step > args.max_steps:
train_iterator.close()
break
tb_writer.close()
return global_step, tr_loss / global_step