# original cifar10_fast repo uses [0, 5, 24] and [0, 0.4, 0]
if args.lr_scale is None:
args.lr_scale = 0.4
lr_schedule = PiecewiseLinear([0, args.pivot_epoch, args.num_epochs],
[0, args.lr_scale, 0])
# grad_reduction only controls how gradients from different
# workers are combined
# so the lr is multiplied by num_workers for both mean and median
spe = steps_per_epoch(args.local_batch_size, train_loader.dataset,
args.num_workers)
lambda_step = lambda step: lr_schedule(step / spe)
lr_scheduler = LambdaLR(opt, lr_lambda=lambda_step)
# set up output
log_dir = make_logdir(args)
if args.use_tensorboard:
writer = SummaryWriter(log_dir=log_dir)
else:
writer = None
print('Finished initializing in {:.2f} seconds'.format(timer()))
# and do the training
train(model,
opt,
lr_scheduler,
train_loader,
test_loader,
args,
writer,
loggers=(TableLogger(), ),
def train():
parser = ArgumentParser()
parser.add_argument("--dataset_path", type=str, default="../data/consolidated_10", help="Path or url of the dataset. If empty download from S3.")
parser.add_argument("--dataset_cache", type=str, default='../data/consolidated_10', help="Path or url of the dataset cache")
parser.add_argument("--model_checkpoint", type=str, default="openai-gpt", help="Path, url or short name of the model")
parser.add_argument("--num_candidates", type=int, default=2, help="Number of candidates for training")
parser.add_argument("--max_history", type=int, default=2, help="Number of previous exchanges to keep in history")
parser.add_argument("--train_batch_size", type=int, default=4, help="Batch size for training")
parser.add_argument("--valid_batch_size", type=int, default=4, help="Batch size for validation")
parser.add_argument("--gradient_accumulation_steps", type=int, default=8, help="Accumulate gradients on several steps")
parser.add_argument("--lr", type=float, default=6.25e-5, help="Learning rate")
parser.add_argument("--lm_coef", type=float, default=1.0, help="LM loss coefficient")
parser.add_argument("--mc_coef", type=float, default=1.0, help="Multiple-choice loss coefficient")
parser.add_argument("--persona_coef", type=float, default=1.0, help="Persona loss coefficient")
parser.add_argument("--max_norm", type=float, default=1.0, help="Clipping gradient norm")
parser.add_argument("--n_epochs", type=int, default=3, help="Number of training epochs")
parser.add_argument("--eval_before_start", action='store_true', help="If true start with a first evaluation before training")
parser.add_argument("--test", action='store_true', help="If true use the test data")
parser.add_argument("--device", type=str, default="cuda" if torch.cuda.is_available() else "cpu", help="Device (cuda or cpu)")
parser.add_argument("--fp16", type=str, default="", help="Set to O0, O1, O2 or O3 for fp16 training (see apex documentation)")
parser.add_argument("--local_rank", type=int, default=-1, help="Local rank for distributed training (-1: not distributed)")
args = parser.parse_args()
# logging is set to INFO (resp. WARN) for main (resp. auxiliary) process. logger.info => log main process only, logger.warning => log all processes
logging.basicConfig(level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
logger.warning("Running process %d", args.local_rank) # This is a logger.warning: it will be printed by all distributed processes
logger.info("Arguments: %s", pformat(args))
if args.test:
args.dataset_path = args.dataset_path + "/test/" + MODEL_NAME + "_test.json"
args.dataset_cache = args.dataset_cache + "/test/dataset_cache"
else:
args.dataset_path = args.dataset_path + "/train_val/" + MODEL_NAME + "_train_val.json"
args.dataset_cache = args.dataset_cache + "/train_val/dataset_cache"
# Initialize distributed training if needed
args.distributed = (args.local_rank != -1)
if args.distributed:
torch.cuda.set_device(args.local_rank)
args.device = torch.device("cuda", args.local_rank)
torch.distributed.init_process_group(backend='nccl', init_method='env://')
logger.info("Prepare tokenizer, pretrained model and optimizer.")
tokenizer_class = OpenAIGPTTokenizer # cant use Autotokenizer because checkpoint could be a Path
tokenizer = tokenizer_class.from_pretrained(args.model_checkpoint)
model_class = OpenAIGPTTripleHeadsModel
model = model_class.from_pretrained(args.model_checkpoint)
model.to(args.device)
# Add special tokens if they are not already added
add_special_tokens_(model, tokenizer)
optimizer = AdamW(model.parameters(), lr=args.lr, correct_bias=True)
# Prepare model for FP16 and distributed training if needed (order is important, distributed should be the last)
if args.fp16:
from apex import amp # Apex is only required if we use fp16 training
model, optimizer = amp.initialize(model, optimizer, opt_level=args.fp16)
if args.distributed:
model = DistributedDataParallel(model, device_ids=[args.local_rank], output_device=args.local_rank)
logger.info("Prepare datasets")
train_loader, val_loader, train_sampler, valid_sampler = get_data_loaders(args, tokenizer)
# Training function and trainer
def update(engine, batch):
model.train()
batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
input_ids, mc_token_ids, persona_token_ids, lm_labels, mc_labels, persona_labels, token_type_ids = batch
(lm_loss), (mc_loss), (persona_loss), *_ = model(
input_ids, token_type_ids=token_type_ids, mc_token_ids=mc_token_ids, persona_token_ids=persona_token_ids,
mc_labels=mc_labels, labels=lm_labels, persona_labels=persona_labels,
num_candidate_personas=NUM_CANDIDATE_PERSONAS, return_dict=False
)
loss = (lm_loss * args.lm_coef + mc_loss * args.mc_coef + persona_loss * args.persona_coef) / args.gradient_accumulation_steps
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_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
if engine.state.iteration % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
return loss.item()
trainer = Engine(update)
# Evaluation function and evaluator (evaluator output is the input of the metrics)
def inference(engine, batch):
model.eval()
with torch.no_grad():
batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
input_ids, mc_token_ids, persona_token_ids, lm_labels, mc_labels, persona_labels, token_type_ids = batch
# if we dont send labels to model, it doesnt return losses
(lm_loss), (mc_loss), (persona_loss), lm_logits, mc_logits, persona_logits, *_ = model(
input_ids, token_type_ids=token_type_ids, mc_token_ids=mc_token_ids, persona_token_ids=persona_token_ids,
mc_labels=mc_labels, labels=lm_labels, persona_labels=persona_labels,
num_candidate_personas=NUM_CANDIDATE_PERSONAS, return_dict=False
)
loss = (lm_loss * args.lm_coef + mc_loss * args.mc_coef + persona_loss * args.persona_coef) / args.gradient_accumulation_steps
for b in range(0, input_ids.shape[0]):
logger.info("Candidate personas")
logger.info(tokenizer.decode(input_ids[b, -NUM_CANDIDATE_PERSONAS:, 1].tolist()))
logger.info("Candidate persona logits")
logger.info(persona_logits[b, :].tolist())
logger.info("Dialog")
logger.info(tokenizer.decode(input_ids[b, -1, :].tolist()))
lm_logits_flat_shifted = lm_logits[..., :-1, :].contiguous().view(-1, lm_logits.size(-1))
lm_labels_flat_shifted = lm_labels[..., 1:].contiguous().view(-1)
return (lm_logits_flat_shifted, mc_logits, persona_logits, loss), (lm_labels_flat_shifted, mc_labels, persona_labels)
evaluator = Engine(inference)
# Attach evaluation to trainer: we evaluate when we start the training and at the end of each epoch
trainer.add_event_handler(Events.EPOCH_COMPLETED, lambda _: evaluator.run(val_loader))
if args.n_epochs < 1:
trainer.add_event_handler(Events.COMPLETED, lambda _: evaluator.run(val_loader))
if args.eval_before_start:
trainer.add_event_handler(Events.STARTED, lambda _: evaluator.run(val_loader))
# Make sure distributed data samplers split the dataset nicely between the distributed processes
if args.distributed:
trainer.add_event_handler(Events.EPOCH_STARTED, lambda engine: train_sampler.set_epoch(engine.state.epoch))
evaluator.add_event_handler(Events.EPOCH_STARTED, lambda engine: valid_sampler.set_epoch(engine.state.epoch))
# Linearly decrease the learning rate from lr to zero
scheduler = PiecewiseLinear(optimizer, "lr", [(0, args.lr), (args.n_epochs * len(train_loader), 0.0)])
trainer.add_event_handler(Events.ITERATION_STARTED, scheduler)
# Prepare metrics - note how we compute distributed metrics
RunningAverage(output_transform=lambda x: x).attach(trainer, "loss")
metrics = {"nll": Loss(torch.nn.CrossEntropyLoss(ignore_index=-100), output_transform=lambda x: (x[0][0], x[1][0])),
"mc_accuracy": Accuracy(output_transform=lambda x: (x[0][1], x[1][1])),
"persona_accuracy": Accuracy(output_transform=lambda x: (x[0][2], x[1][2])),
"evaluation_loss": RunningAverage(output_transform=lambda x: x[0][3])
}
metrics.update({"average_nll": MetricsLambda(average_distributed_scalar, metrics["nll"], args),
"average_mc_accuracy": MetricsLambda(average_distributed_scalar, metrics["mc_accuracy"], args),
"average_persona_accuracy": MetricsLambda(average_distributed_scalar, metrics["persona_accuracy"], args)
})
metrics["average_ppl"] = MetricsLambda(math.exp, metrics["average_nll"])
for name, metric in metrics.items():
metric.attach(evaluator, name)
# On the main process: add progress bar, tensorboard, checkpoints and save model, configuration and tokenizer before we start to train
if args.local_rank in [-1, 0]:
pbar = ProgressBar(persist=True)
pbar.attach(trainer, metric_names=["loss"])
evaluator.add_event_handler(Events.COMPLETED, lambda _: pbar.log_message("Validation: %s" % pformat(evaluator.state.metrics)))
log_dir = make_logdir(args.model_checkpoint + '_' + MODEL_NAME)
tb_logger = TensorboardLogger(log_dir)
tb_logger.attach(trainer, log_handler=OutputHandler(tag="training", metric_names=["loss"]), event_name=Events.ITERATION_COMPLETED)
tb_logger.attach(trainer, log_handler=OptimizerParamsHandler(optimizer), event_name=Events.ITERATION_STARTED)
tb_logger.attach(evaluator, log_handler=OutputHandler(tag="validation", metric_names=list(metrics.keys()), global_step_transform=global_step_from_engine(trainer)), event_name=Events.EPOCH_COMPLETED)
checkpoint_handler = ModelCheckpoint(log_dir, 'checkpoint', save_interval=1, n_saved=3)
trainer.add_event_handler(Events.EPOCH_COMPLETED, checkpoint_handler, {'mymodel': getattr(model, 'module', model)}) # "getattr" takes care of distributed encapsulation
torch.save(args, log_dir + '/model_training_args.bin')
getattr(model, 'module', model).config.to_json_file(os.path.join(log_dir, CONFIG_NAME))
tokenizer.save_pretrained(log_dir)
# Run the training
trainer.run(train_loader, max_epochs=args.n_epochs)
# On the main process: close tensorboard logger and rename the last checkpoint (for easy re-loading with OpenAIGPTModel.from_pretrained method)
if args.local_rank in [-1, 0] and args.n_epochs > 0:
os.rename(os.path.join(log_dir, checkpoint_handler._saved[-1][1]), os.path.join(log_dir, WEIGHTS_NAME)) # TODO: PR in ignite to have better access to saved file paths (cleaner)
tb_logger.close()
def train(args):
logger.info("Prepare tokenizer, pretrained model and optimizer.")
tokenizer, _, vocab = get_kogpt2_tokenizer()
model = get_kogpt2_model()
model.to(args.device)
optimizer = AdamW(model.parameters(), lr=args.lr, correct_bias=True)
logger.info("Prepare datasets")
train_loader, val_loader = get_data_loaders(args, tokenizer, vocab)
def update(engine, batch):
model.train()
batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
input_ids, labels, token_type_ids = batch
loss, *_ = model(input_ids,
token_type_ids=token_type_ids,
labels=labels)
loss = loss / args.gradient_accumulation_steps
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
if engine.state.iteration % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
return loss.item()
trainer = Engine(update)
def inference(engine, batch):
model.eval()
with torch.no_grad():
batch = tuple(
input_tensor.to(args.device) for input_tensor in batch)
input_ids, labels, token_type_ids = batch
# logger.info(tokenizer.decode(input_ids[0, -1, :].tolist()))
# if we dont send labels to model, it doesnt return losses
logits, *_ = model(input_ids, token_type_ids=token_type_ids)
logits_flat_shifted = logits[..., :-1, :].contiguous().view(
-1, logits.size(-1))
labels_flat_shifted = labels[..., 1:].contiguous().view(-1)
return (logits_flat_shifted), (labels_flat_shifted)
evaluator = Engine(inference)
# Attach evaluation to trainer: we evaluate when we start the training and at the end of each epoch
trainer.add_event_handler(Events.EPOCH_COMPLETED,
lambda _: evaluator.run(val_loader))
if args.n_epochs < 1:
trainer.add_event_handler(Events.COMPLETED,
lambda _: evaluator.run(val_loader))
if args.eval_before_start:
trainer.add_event_handler(Events.STARTED,
lambda _: evaluator.run(val_loader))
# Linearly decrease the learning rate from lr to zero
scheduler = PiecewiseLinear(optimizer, "lr",
[(0, args.lr),
(args.n_epochs * len(train_loader), 0.0)])
trainer.add_event_handler(Events.ITERATION_STARTED, scheduler)
# Prepare metrics - note how we compute distributed metrics
RunningAverage(output_transform=lambda x: x).attach(trainer, "loss")
metrics = {
"nll":
Loss(torch.nn.CrossEntropyLoss(ignore_index=-100),
output_transform=lambda x: (x[0], x[1])),
"accuracy":
Accuracy(output_transform=lambda x: (x[0], x[1]))
}
for name, metric in metrics.items():
metric.attach(evaluator, name)
# On the main process: add progress bar, tensorboard, checkpoints and save model,
# configuration and tokenizer before we start to train
pbar = ProgressBar(persist=True)
pbar.attach(trainer, metric_names=["loss"])
evaluator.add_event_handler(
Events.COMPLETED, lambda _: pbar.log_message(
"Validation: %s" % pformat(evaluator.state.metrics)))
log_dir = make_logdir("kogpt2_personachat")
tb_logger = TensorboardLogger(log_dir)
tb_logger.attach(trainer,
log_handler=OutputHandler(tag="training",
metric_names=["loss"]),
event_name=Events.ITERATION_COMPLETED)
tb_logger.attach(trainer,
log_handler=OptimizerParamsHandler(optimizer),
event_name=Events.ITERATION_STARTED)
tb_logger.attach(
evaluator,
log_handler=OutputHandler(
tag="validation",
metric_names=list(metrics.keys()),
global_step_transform=global_step_from_engine(trainer)),
event_name=Events.EPOCH_COMPLETED)
checkpoint_handler = ModelCheckpoint(log_dir,
'checkpoint',
save_interval=1,
n_saved=3)
trainer.add_event_handler(
Events.EPOCH_COMPLETED, checkpoint_handler,
{'mymodel': getattr(model, 'module', model)
}) # "getattr" takes care of distributed encapsulation
torch.save(args, log_dir + '/model_training_args.bin')
getattr(model, 'module',
model).config.to_json_file(os.path.join(log_dir, CONFIG_NAME))
# tokenizer.save_pretrained(log_dir)
# Run the training
trainer.run(train_loader, max_epochs=args.n_epochs)
# On the main process: close tensorboard logger and rename the last checkpoint (for easy re-loading with OpenAIGPTModel.from_pretrained method)
# TODO: PR in ignite to have better access to saved file paths (cleaner)
os.rename(os.path.join(log_dir, checkpoint_handler._saved[-1][1]),
os.path.join(log_dir, WEIGHTS_NAME))
tb_logger.close()
def train():
args = parse_args(default_lr=4e-2)
print(args)
timer = Timer()
logger.info("Prepare tokenizer, pretrained model and optimizer.")
if "gpt2" in args.model_checkpoint:
tokenizer_class = GPT2Tokenizer
model_class = GPT2DoubleHeadsModel
else:
tokenizer_class = OpenAIGPTTokenizer
model_class = OpenAIGPTDoubleHeadsModel
tokenizer = tokenizer_class.from_pretrained(args.model_checkpoint)
if args.do_finetune:
if not args.do_test:
args.model_checkpoint = args.finetune_path
model = model_class.from_pretrained(args.model_checkpoint)
args.len_tokenizer = len(tokenizer)
# Do logging now before we overwrite model
log_dir = make_logdir(args)
writer = SummaryWriter(log_dir=log_dir)
tokenizer.save_pretrained(log_dir)
getattr(model, 'module',
model).config.to_json_file(os.path.join(log_dir, CONFIG_NAME))
# Add special tokens if they are not already added
add_special_tokens_(model, tokenizer)
# HAVE TO USE SGD FOR FED
optimizer = SGD(model.parameters(), lr=1)
logger.info('Finished in {:.2f} seconds'.format(timer()))
logger.info("Prepare datasets")
loaders = get_data_loaders(args, tokenizer)
train_loader, val_loader = loaders
logger.info('Finished in {:.2f} seconds'.format(timer()))
logger.info("Initializing everything")
model = FedModel(model, compute_loss_train, args, compute_loss_val)
optimizer = FedOptimizer(optimizer, args)
spe = steps_per_epoch(args.local_batch_size, train_loader.dataset,
args.num_workers)
print("Steps per epoch", spe)
lr_schedule = PiecewiseLinear([0, args.num_epochs * spe],
[args.lr_scale, 0.0])
lambda_step = lambda x: lr_schedule(x)
scheduler = torch.optim.lr_scheduler.LambdaLR(optimizer,
lr_lambda=[lambda_step])
if args.do_finetune:
test_gpt2(model,
val_loader,
args,
logger=TableLogger(),
timer=timer,
writer=writer)
else:
train_gpt2(model,
optimizer,
scheduler,
train_loader,
val_loader,
args,
log_dir,
writer=writer,
logger=TableLogger(),
timer=timer)
model.finalize()
def train():
parser = ArgumentParser()
parser.add_argument("--dataset_path",
type=str,
default="",
help="Path or url of the dataset.")
parser.add_argument("--use_adapter",
default=False,
action='store_true',
help="Use adapter or not")
parser.add_argument("--keyword_module",
type=str,
default="",
help="add, attention, ")
parser.add_argument("--train_batch_size",
type=int,
default=20,
help="Batch size for training")
parser.add_argument("--valid_batch_size",
type=int,
default=20,
help="Batch size for validation")
parser.add_argument("--gradient_accumulation_steps",
type=int,
default=8,
help="Accumulate gradients on several steps")
parser.add_argument("--lr",
type=float,
default=6.25e-5,
help="Learning rate")
parser.add_argument("--max_norm",
type=float,
default=1.0,
help="Clipping gradient norm")
parser.add_argument("--n_epochs",
type=int,
default=5,
help="Number of training epochs")
parser.add_argument(
"--eval_before_start",
action='store_true',
help="If true start with a first evaluation before training")
parser.add_argument("--device",
type=str,
default="cuda" if torch.cuda.is_available() else "cpu",
help="Device (cuda or cpu)")
parser.add_argument(
"--fp16",
type=str,
default="",
help=
"Set to O0, O1, O2 or O3 for fp16 training (see apex documentation)")
parser.add_argument(
"--local_rank",
type=int,
default=-1,
help="Local rank for distributed training (-1: not distributed)")
parser.add_argument("--gpt2_model_name",
type=str,
default="gpt2",
help="Path, url or short name of the model")
args = parser.parse_args()
# logging is set to INFO (resp. WARN) for main (resp. auxiliary) process. logger.info => log main process only, logger.warning => log all processes
logging.basicConfig(
level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
logger.warning(
"Running process %d", args.local_rank
) # This is a logger.warning: it will be printed by all distributed processes
logger.info("Arguments: %s", pformat(args))
# Initialize distributed training if needed
args.distributed = (args.local_rank != -1)
if args.distributed:
torch.cuda.set_device(args.local_rank)
args.device = torch.device("cuda", args.local_rank)
torch.distributed.init_process_group(backend='nccl',
init_method='env://')
logger.info("Prepare tokenizer, pretrained model and optimizer.")
bert_tokenizer = BertTokenizer.from_pretrained('bert-base-uncased')
bert_model = BertModel.from_pretrained('bert-base-uncased')
bert_model.to(args.device)
bert_model.eval()
tokenizer_class = GPT2Tokenizer if "gpt2" in args.gpt2_model_name else OpenAIGPTTokenizer # cant use Autotokenizer because checkpoint could be a Path
tokenizer = tokenizer_class.from_pretrained(args.gpt2_model_name)
config_class = GPT2Config if "gpt2" in args.gpt2_model_name else OpenAIGPTConfig
gpt_config = config_class.from_pretrained(args.gpt2_model_name)
gpt_config.adapter = args.use_adapter
gpt_config.keyword_module = args.keyword_module
model_class = GPT2LMHeadModel if "gpt2" in args.gpt2_model_name else OpenAIGPTLMHeadModel
model = model_class.from_pretrained(args.gpt2_model_name,
config=gpt_config)
model.to(args.device)
# Add special tokens if they are not already added
add_special_tokens_(model, tokenizer)
optimizer = AdamW(model.parameters(), lr=args.lr, correct_bias=True)
# Prepare model for FP16 and distributed training if needed (order is important, distributed should be the last)
if args.fp16:
from apex import amp # Apex is only required if we use fp16 training
model, optimizer = amp.initialize(model,
optimizer,
opt_level=args.fp16)
if args.distributed:
model = DistributedDataParallel(model,
device_ids=[args.local_rank],
output_device=args.local_rank)
logger.info("Prepare datasets")
train_loader, val_loader, train_sampler, valid_sampler = get_data_loaders(
args, bert_tokenizer, tokenizer)
# Training function and trainer
def update(engine, batch):
model.train()
batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
source_ids, target_ids, lm_labels = batch
encoded_layers, _ = bert_model(source_ids)
(lm_loss), *_ = model(target_ids, encoded_layers, labels=lm_labels)
loss = lm_loss / args.gradient_accumulation_steps
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_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
if engine.state.iteration % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
return loss.item()
trainer = Engine(update)
# Evaluation function and evaluator (evaluator output is the input of the metrics)
def inference(engine, batch):
model.eval()
with torch.no_grad():
batch = tuple(
input_tensor.to(args.device) for input_tensor in batch)
source_ids, target_ids, lm_labels = batch
logger.info(tokenizer.decode(target_ids[0].tolist()))
encoded_layers, _ = bert_model(source_ids)
lm_logits, *_ = model(target_ids, encoded_layers)
lm_logits_flat_shifted = lm_logits[..., :-1, :].contiguous().view(
-1, lm_logits.size(-1))
lm_labels_flat_shifted = lm_labels[..., 1:].contiguous().view(-1)
return (lm_logits_flat_shifted, ), (lm_labels_flat_shifted, )
evaluator = Engine(inference)
# Attach evaluation to trainer: we evaluate when we start the training and at the end of each epoch
trainer.add_event_handler(Events.EPOCH_COMPLETED,
lambda _: evaluator.run(val_loader))
if args.n_epochs < 1:
trainer.add_event_handler(Events.COMPLETED,
lambda _: evaluator.run(val_loader))
if args.eval_before_start:
trainer.add_event_handler(Events.STARTED,
lambda _: evaluator.run(val_loader))
# Make sure distributed data samplers split the dataset nicely between the distributed processes
if args.distributed:
trainer.add_event_handler(
Events.EPOCH_STARTED,
lambda engine: train_sampler.set_epoch(engine.state.epoch))
evaluator.add_event_handler(
Events.EPOCH_STARTED,
lambda engine: valid_sampler.set_epoch(engine.state.epoch))
# Linearly decrease the learning rate from lr to zero
scheduler = PiecewiseLinear(optimizer, "lr",
[(0, args.lr),
(args.n_epochs * len(train_loader), 0.0)])
trainer.add_event_handler(Events.ITERATION_STARTED, scheduler)
# Prepare metrics - note how we compute distributed metrics
RunningAverage(output_transform=lambda x: x).attach(trainer, "loss")
metrics = {
"nll":
Loss(torch.nn.CrossEntropyLoss(ignore_index=-100),
output_transform=lambda x: (x[0][0], x[1][0]))
}
metrics.update({
"average_nll":
MetricsLambda(average_distributed_scalar, metrics["nll"], args)
})
metrics["average_ppl"] = MetricsLambda(math.exp, metrics["average_nll"])
for name, metric in metrics.items():
metric.attach(evaluator, name)
# On the main process: add progress bar, tensorboard, checkpoints and save model, configuration and tokenizer before we start to train
if args.local_rank in [-1, 0]:
pbar = ProgressBar(persist=True)
pbar.attach(trainer, metric_names=["loss"])
evaluator.add_event_handler(
Events.COMPLETED, lambda _: pbar.log_message(
"Validation: %s" % pformat(evaluator.state.metrics)))
log_dir = make_logdir(args.gpt2_model_name, args.dataset_path,
args.use_adapter, args.keyword_module)
tb_logger = TensorboardLogger(log_dir)
tb_logger.attach(trainer,
log_handler=OutputHandler(tag="training",
metric_names=["loss"]),
event_name=Events.ITERATION_COMPLETED)
tb_logger.attach(trainer,
log_handler=OptimizerParamsHandler(optimizer),
event_name=Events.ITERATION_STARTED)
tb_logger.attach(evaluator,
log_handler=OutputHandler(tag="validation",
metric_names=list(
metrics.keys()),
another_engine=trainer),
event_name=Events.EPOCH_COMPLETED)
checkpoint_handler = ModelCheckpoint(log_dir,
'checkpoint',
save_interval=1,
n_saved=4)
trainer.add_event_handler(
Events.EPOCH_COMPLETED, checkpoint_handler,
{'mymodel': getattr(model, 'module', model)
}) # "getattr" takes care of distributed encapsulation
torch.save(args, log_dir + '/model_training_args.bin')
getattr(model, 'module',
model).config.to_json_file(os.path.join(log_dir, CONFIG_NAME))
tokenizer.save_pretrained(log_dir)
# Run the training
trainer.run(train_loader, max_epochs=args.n_epochs)
# On the main process: close tensorboard logger and rename the last checkpoint (for easy re-loading with OpenAIGPTModel.from_pretrained method)
if args.local_rank in [-1, 0] and args.n_epochs > 0:
os.rename(
os.path.join(log_dir, checkpoint_handler._saved[-1][1]),
os.path.join(log_dir, WEIGHTS_NAME)
) # TODO: PR in ignite to have better access to saved file paths (cleaner)
tb_logger.close()
def train():
parser = ArgumentParser()
parser.add_argument(
"--dataset_path",
type=str,
default="",
help="Path or url of the dataset. If empty download from S3.")
parser.add_argument("--dataset_cache",
type=str,
default='./dataset_cache',
help="Path or url of the dataset cache")
parser.add_argument("--model_checkpoint",
type=str,
default="multi-bert",
help="Path, url or short name of the model")
parser.add_argument("--num_candidates",
type=int,
default=2,
help="Number of candidates for training")
parser.add_argument("--max_turns",
type=int,
default=3,
help="Number of previous turns to keep in history")
parser.add_argument("--train_batch_size",
type=int,
default=4,
help="Batch size for training")
parser.add_argument("--valid_batch_size",
type=int,
default=4,
help="Batch size for validation")
parser.add_argument("--gradient_accumulation_steps",
type=int,
default=8,
help="Accumulate gradients on several steps")
parser.add_argument("--lr",
type=float,
default=6.25e-5,
help="Learning rate")
parser.add_argument("--lm_coef",
type=float,
default=1.0,
help="LM loss coefficient")
parser.add_argument("--max_norm",
type=float,
default=1.0,
help="Clipping gradient norm")
parser.add_argument("--n_epochs",
type=int,
default=3,
help="Number of training epochs")
parser.add_argument("--personality_permutations",
type=int,
default=1,
help="Number of permutations of personality sentences")
parser.add_argument(
"--eval_before_start",
action='store_true',
help="If true start with a first evaluation before training")
parser.add_argument("--device",
type=str,
default="cuda" if torch.cuda.is_available() else "cpu",
help="Device (cuda or cpu)")
parser.add_argument(
"--fp16",
type=str,
default="",
help=
"Set to O0, O1, O2 or O3 for fp16 training (see apex documentation)")
parser.add_argument(
"--local_rank",
type=int,
default=-1,
help="Local rank for distributed training (-1: not distributed)")
parser.add_argument(
"--train_lang",
type=str,
default="",
help="train monolingual model, defaul: multilingual model")
parser.add_argument("--no_lang_id",
action='store_true',
help="no language id as input")
args = parser.parse_args()
# logging is set to INFO (resp. WARN) for main (resp. auxiliary) process. logger.info => log main process only, logger.warning => log all processes
logging.basicConfig(
level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
logger.warning(
"Running process %d", args.local_rank
) # This is a logger.warning: it will be printed by all distributed processes
logger.info("Arguments: %s", pformat(args))
# Initialize distributed training if needed
args.distributed = (args.local_rank != -1)
if args.distributed:
torch.cuda.set_device(args.local_rank)
args.device = torch.device("cuda", args.local_rank)
torch.distributed.init_process_group(backend='nccl',
init_method='env://')
# Model
logger.info("Prepare tokenizer, pretrained model and optimizer.")
model_path = 'bert-base-multilingual-cased'
if args.train_lang in ["En", "It", "Jp",
"Zh"]: # for Fr Ko Id we use MBERT
model_path = LANG_2_MODEL[args.train_lang]
tokenizer = BertTokenizer.from_pretrained(model_path)
if args.train_lang == "Jp":
tokenizer = BertJapaneseTokenizer.from_pretrained(model_path)
bertconfig = BertConfig.from_pretrained(model_path)
bertconfig.is_decoder = False # for not initailize crossattention
model = BertForMaskedLM.from_pretrained(model_path,
**{"config": bertconfig})
model.config.is_decoder = True
model.to(args.device)
# Add special tokens if they are not already added
add_special_tokens_(model, tokenizer)
optimizer = AdamW(model.parameters(), lr=args.lr, correct_bias=True)
# Prepare model for FP16 and distributed training if needed (order is important, distributed should be the last)
if args.fp16:
from apex import amp # Apex is only required if we use fp16 training
model, optimizer = amp.initialize(model,
optimizer,
opt_level=args.fp16)
if args.distributed:
model = DistributedDataParallel(model,
device_ids=[args.local_rank],
output_device=args.local_rank,
find_unused_parameters=True)
logger.info("Prepare datasets")
train_loader, val_loader, train_sampler, valid_sampler = get_data_loaders(
args, tokenizer)
# Training function and trainer
def update(engine, batch):
model.train()
batch = tuple(batch[input_name].to(args.device)
for input_name in MODEL_INPUTS)
input_ids, lm_labels, token_type_ids = batch
lm_loss, prediction_scores, *_ = model(input_ids=input_ids,
token_type_ids=token_type_ids,
lm_labels=lm_labels)
#batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
loss = (lm_loss) / args.gradient_accumulation_steps
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_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
if engine.state.iteration % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
return loss.item()
trainer = Engine(update)
# Evaluation function and evaluator (evaluator output is the input of the metrics)
def inference(engine, batch):
model.eval()
with torch.no_grad():
batch = tuple(batch[input_name].to(args.device)
for input_name in MODEL_INPUTS)
input_ids, lm_labels, token_type_ids = batch
logger.info(tokenizer.decode(input_ids[0, :].tolist()))
# if we dont send labels to model, it doesnt return losses
lm_logits, *_ = model(input_ids=input_ids,
token_type_ids=token_type_ids)
lm_logits_flat_shifted = lm_logits[..., :-1, :].contiguous().view(
-1, lm_logits.size(-1))
lm_labels_flat_shifted = lm_labels[..., 1:].contiguous().view(-1)
return (lm_logits_flat_shifted, ), (lm_labels_flat_shifted, )
evaluator = Engine(inference)
# Attach evaluation to trainer: we evaluate when we start the training and at the end of each epoch
trainer.add_event_handler(Events.EPOCH_COMPLETED,
lambda _: evaluator.run(val_loader))
if args.n_epochs < 1:
trainer.add_event_handler(Events.COMPLETED,
lambda _: evaluator.run(val_loader))
if args.eval_before_start:
trainer.add_event_handler(Events.STARTED,
lambda _: evaluator.run(val_loader))
# Make sure distributed data samplers split the dataset nicely between the distributed processes
if args.distributed:
trainer.add_event_handler(
Events.EPOCH_STARTED,
lambda engine: train_sampler.set_epoch(engine.state.epoch))
evaluator.add_event_handler(
Events.EPOCH_STARTED,
lambda engine: valid_sampler.set_epoch(engine.state.epoch))
# Linearly decrease the learning rate from lr to zero
scheduler = PiecewiseLinear(optimizer, "lr",
[(0, args.lr),
(args.n_epochs * len(train_loader), 0.0)])
trainer.add_event_handler(Events.ITERATION_STARTED, scheduler)
# Prepare metrics - note how we compute distributed metrics
RunningAverage(output_transform=lambda x: x).attach(trainer, "loss")
metrics = {
"nll":
Loss(torch.nn.CrossEntropyLoss(ignore_index=-1),
output_transform=lambda x: (x[0][0], x[1][0]))
}
metrics.update({
"average_nll":
MetricsLambda(average_distributed_scalar, metrics["nll"], args)
})
metrics["average_ppl"] = MetricsLambda(math.exp, metrics["average_nll"])
for name, metric in metrics.items():
metric.attach(evaluator, name)
# On the main process: add progress bar, tensorboard, checkpoints and save model, configuration and tokenizer before we start to train
if args.local_rank in [-1, 0]:
pbar = ProgressBar(persist=True)
pbar.attach(trainer, metric_names=["loss"])
evaluator.add_event_handler(
Events.COMPLETED, lambda _: pbar.log_message(
"Validation: %s" % pformat(evaluator.state.metrics)))
log_dir = make_logdir(args.model_checkpoint)
log_dir += "_decoder_only"
if args.no_lang_id:
log_dir += "_noid"
if args.train_lang in ["En", "Fr", "It", "Id", "Jp", "Ko", "Zh"]:
log_dir += "_" + args.train_lang
tb_logger = TensorboardLogger(log_dir)
tb_logger.attach(trainer,
log_handler=OutputHandler(tag="training",
metric_names=["loss"]),
event_name=Events.ITERATION_COMPLETED)
tb_logger.attach(trainer,
log_handler=OptimizerParamsHandler(optimizer),
event_name=Events.ITERATION_STARTED)
tb_logger.attach(evaluator,
log_handler=OutputHandler(tag="validation",
metric_names=list(
metrics.keys()),
another_engine=trainer),
event_name=Events.EPOCH_COMPLETED)
checkpoint_handler = ModelCheckpoint(log_dir,
'checkpoint',
save_interval=1,
n_saved=3)
trainer.add_event_handler(
Events.EPOCH_COMPLETED, checkpoint_handler,
{'mymodel': getattr(model, 'module', model)
}) # "getattr" takes care of distributed encapsulation
torch.save(args, log_dir + '/model_training_args.bin')
getattr(model, 'module', model).config.to_json_file(
os.path.join(log_dir, CONFIG_NAME)
) # the config for encoder and decoder should be the same
tokenizer.save_pretrained(log_dir)
# Run the training
trainer.run(train_loader, max_epochs=args.n_epochs)
# On the main process: close tensorboard logger and rename the last checkpoint (for easy re-loading with OpenAIGPTModel.from_pretrained method)
if args.local_rank in [-1, 0] and args.n_epochs > 0:
os.rename(
checkpoint_handler._saved[-1][1][-1],
os.path.join(log_dir, WEIGHTS_NAME)
) # TODO: PR in ignite to have better access to saved file paths (cleaner)
tb_logger.close()
def train():
parser = ArgumentParser()
parser.add_argument(
"--dataset_path",
type=str,
default="",
help="Path or url of the dataset. If empty download from S3.")
parser.add_argument("--dataset_cache",
type=str,
default='./dataset_cache',
help="Path or url of the dataset cache")
parser.add_argument("--model_checkpoint",
type=str,
default="gpt2",
help="Path, url or short name of the model")
parser.add_argument(
"--task",
type=str,
default="dialogue",
help="one of task from [dialogue, qa, mt, nlg, summarization]")
parser.add_argument("--emb_only",
action='store_true',
help="fine tune only task embeddings")
parser.add_argument("--linear_perturb",
action='store_true',
help="fine tune only task embeddings")
parser.add_argument("--max_history",
type=int,
default=2,
help="Number of previous exchanges to keep in history")
parser.add_argument("--train_batch_size",
type=int,
default=4,
help="Batch size for training")
parser.add_argument("--valid_batch_size",
type=int,
default=4,
help="Batch size for validation")
parser.add_argument("--gradient_accumulation_steps",
type=int,
default=8,
help="Accumulate gradients on several steps")
parser.add_argument("--lr",
type=float,
default=6.25e-5,
help="Learning rate")
parser.add_argument("--lm_coef",
type=float,
default=1.0,
help="LM loss coefficient")
parser.add_argument("--max_norm",
type=float,
default=1.0,
help="Clipping gradient norm")
parser.add_argument("--n_epochs",
type=int,
default=1,
help="Number of training epochs")
parser.add_argument("--personality_permutations",
type=int,
default=1,
help="Number of permutations of personality sentences")
parser.add_argument(
"--eval_before_start",
action='store_true',
help="If true start with a first evaluation before training")
parser.add_argument("--device",
type=str,
default="cuda" if torch.cuda.is_available() else "cpu",
help="Device (cuda or cpu)")
parser.add_argument(
"--fp16",
type=str,
default="",
help=
"Set to O0, O1, O2 or O3 for fp16 training (see apex documentation)")
parser.add_argument(
"--local_rank",
type=int,
default=-1,
help="Local rank for distributed training (-1: not distributed)")
parser.add_argument("--perturbation_layers",
type=int,
default=0,
help="number of perturbation layers")
parser.add_argument("--self_copy",
action='store_true',
help="add self copy ")
parser.add_argument("--adapter_bottleneck",
type=int,
default=0,
help="adapter layer bottleneck")
parser.add_argument("--random_init",
action='store_true',
help="don't use GPT-2 pre-trained model ")
parser.add_argument("--distillation", action='store_true')
parser.add_argument("--outputlayer_only", action='store_true')
args = parser.parse_args()
# logging is set to INFO (resp. WARN) for main (resp. auxiliary) process. logger.info => log main process only, logger.warning => log all processes
logging.basicConfig(
level=logging.INFO if args.local_rank in [-1, 0] else logging.WARN)
logger.warning(
"Running process %d", args.local_rank
) # This is a logger.warning: it will be printed by all distributed processes
logger.info("Arguments: %s", pformat(args))
# Initialize distributed training if needed
args.distributed = (args.local_rank != -1)
if args.distributed:
torch.cuda.set_device(args.local_rank)
args.device = torch.device("cuda", args.local_rank)
torch.distributed.init_process_group(backend='nccl',
init_method='env://')
logger.info("Prepare tokenizer, pretrained model and optimizer.")
tokenizer_class = GPT2Tokenizer if "gpt2" in args.model_checkpoint else OpenAIGPTTokenizer # cant use Autotokenizer because checkpoint could be a Path
tokenizer = tokenizer_class.from_pretrained(args.model_checkpoint)
model_class = GPT2LMHeadModel if "gpt2" in args.model_checkpoint else OpenAIGPTDoubleHeadsModel
if not args.random_init:
model = model_class.from_pretrained(
args.model_checkpoint,
perturbation_layers=args.perturbation_layers,
self_copy=args.self_copy,
adapter_bottleneck=args.adapter_bottleneck)
else:
config = GPT2Config()
model = model_class(config,
perturbation_layers=args.perturbation_layers,
self_copy=args.self_copy,
adapter_bottleneck=args.adapter_bottleneck)
model.to(args.device)
# Add special tokens if they are not already added
add_special_tokens_(model, tokenizer)
if args.adapter_bottleneck > 0:
parameters_to_update = [
p for n, p in model.named_parameters() if "adapter" in str(n)
] + [model.transformer.wte.weight]
optimizer = AdamW(parameters_to_update, lr=args.lr, correct_bias=True)
elif args.outputlayer_only:
parameters_to_update = [model.transformer.wte.weight]
optimizer = AdamW(parameters_to_update, lr=args.lr, correct_bias=True)
else:
optimizer = AdamW(model.parameters(), lr=args.lr, correct_bias=True)
# Prepare model for FP16 and distributed training if needed (order is important, distributed should be the last)
if args.fp16:
from apex import amp # Apex is only required if we use fp16 training
model, optimizer = amp.initialize(model,
optimizer,
opt_level=args.fp16)
if args.distributed:
model = DistributedDataParallel(model,
device_ids=[args.local_rank],
output_device=args.local_rank)
logger.info("Prepare datasets")
train_loader, val_loader, train_sampler, valid_sampler = get_data_loaders(
args, tokenizer)
# Training function and trainer
def update_emb(engine, batch):
model.train()
batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
input_ids, lm_labels, token_type_ids = batch
(lm_loss), *_ = model(input_ids,
token_type_ids=token_type_ids,
labels=lm_labels)
loss = lm_loss / args.gradient_accumulation_steps
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_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
if engine.state.iteration % args.gradient_accumulation_steps == 0:
param_to_check = []
for n, p in model.named_parameters():
if (n != "transformer.wte.weight"):
param_to_check.append(p)
a = list(param_to_check)[0].clone()
model.transformer.wte.weight.grad[:50257, :] = 0
model.transformer.wte.weight.data.add_(
-args.lr, model.transformer.wte.weight.grad.data)
optimizer.zero_grad()
param_to_check = []
for n, p in model.named_parameters():
if (n != "transformer.wte.weight"):
param_to_check.append(p)
b = list(param_to_check)[0].clone()
assert torch.equal(a.data, b.data)
return loss.item()
# Training function and trainer
def update_linear_perturbation(engine, batch):
model.train()
batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
input_ids, lm_labels, token_type_ids = batch
(lm_loss), *_ = model(input_ids,
token_type_ids=token_type_ids,
labels=lm_labels)
loss = lm_loss / args.gradient_accumulation_steps
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_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
if engine.state.iteration % args.gradient_accumulation_steps == 0:
model.transformer.wte.weight.grad[:50257, :] = 0
# model.transformer.wte.weight.data.add_(-args.lr,model.transformer.wte.weight.grad.data)
optimizer.step()
optimizer.zero_grad()
return loss.item()
# Training function and trainer
def update_all(engine, batch):
model.train()
batch = tuple(input_tensor.to(args.device) for input_tensor in batch)
input_ids, lm_labels, token_type_ids = batch
(lm_loss), *_ = model(input_ids,
token_type_ids=token_type_ids,
labels=lm_labels,
self_copy=args.self_copy)
loss = lm_loss / args.gradient_accumulation_steps
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_norm)
else:
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
if engine.state.iteration % args.gradient_accumulation_steps == 0:
optimizer.step()
optimizer.zero_grad()
return loss.item()
if args.emb_only:
trainer = Engine(update_emb)
elif (args.linear_perturb or args.adapter_bottleneck > 0):
trainer = Engine(update_linear_perturbation)
else:
trainer = Engine(update_all)
# Evaluation function and evaluator (evaluator output is the input of the metrics)
def inference(engine, batch):
model.eval()
with torch.no_grad():
batch = tuple(
input_tensor.to(args.device) for input_tensor in batch)
input_ids, lm_labels, token_type_ids = batch
logger.info(tokenizer.decode(input_ids[0, -1, :].tolist()))
# if we dont send labels to model, it doesnt return losses
lm_logits, *_ = model(
input_ids,
token_type_ids=token_type_ids,
)
lm_logits_flat_shifted = lm_logits[..., :-1, :].contiguous().view(
-1, lm_logits.size(-1))
lm_labels_flat_shifted = lm_labels[..., 1:].contiguous().view(-1)
return (lm_logits_flat_shifted, ), (lm_labels_flat_shifted, )
evaluator = Engine(inference)
# Attach evaluation to trainer: we evaluate when we start the training and at the end of each epoch
trainer.add_event_handler(Events.EPOCH_COMPLETED,
lambda _: evaluator.run(val_loader))
if args.n_epochs < 1:
trainer.add_event_handler(Events.COMPLETED,
lambda _: evaluator.run(val_loader))
if args.eval_before_start:
trainer.add_event_handler(Events.STARTED,
lambda _: evaluator.run(val_loader))
# Make sure distributed data samplers split the dataset nicely between the distributed processes
if args.distributed:
trainer.add_event_handler(
Events.EPOCH_STARTED,
lambda engine: train_sampler.set_epoch(engine.state.epoch))
evaluator.add_event_handler(
Events.EPOCH_STARTED,
lambda engine: valid_sampler.set_epoch(engine.state.epoch))
# Linearly decrease the learning rate from lr to zero
scheduler = PiecewiseLinear(optimizer, "lr",
[(0, args.lr),
(args.n_epochs * len(train_loader), 0.0)])
trainer.add_event_handler(Events.ITERATION_STARTED, scheduler)
# Prepare metrics - note how we compute distributed metrics
RunningAverage(output_transform=lambda x: x).attach(trainer, "loss")
metrics = {
"nll":
Loss(torch.nn.CrossEntropyLoss(ignore_index=-1),
output_transform=lambda x: (x[0][0], x[1][0]))
}
metrics.update({
"average_nll":
MetricsLambda(average_distributed_scalar, metrics["nll"], args)
})
metrics["average_ppl"] = MetricsLambda(math.exp, metrics["average_nll"])
for name, metric in metrics.items():
metric.attach(evaluator, name)
# On the main process: add progress bar, tensorboard, checkpoints and save model, configuration and tokenizer before we start to train
if args.local_rank in [-1, 0]:
pbar = ProgressBar(persist=True)
pbar.attach(trainer, metric_names=["loss"])
evaluator.add_event_handler(
Events.COMPLETED, lambda _: pbar.log_message(
"Validation: %s" % pformat(evaluator.state.metrics)))
log_dir = make_logdir(args.model_checkpoint,
task=args.task,
lr=args.lr,
layer=args.perturbation_layers,
self_copy=args.self_copy,
n_epochs=args.n_epochs,
adapter=args.adapter_bottleneck,
random_init=args.random_init)
if args.distillation:
log_dir += "_distillation"
if args.outputlayer_only:
log_dir += "_outputlayer_only"
tb_logger = TensorboardLogger(log_dir)
tb_logger.attach(trainer,
log_handler=OutputHandler(tag="training",
metric_names=["loss"]),
event_name=Events.ITERATION_COMPLETED)
tb_logger.attach(trainer,
log_handler=OptimizerParamsHandler(optimizer),
event_name=Events.ITERATION_STARTED)
tb_logger.attach(evaluator,
log_handler=OutputHandler(tag="validation",
metric_names=list(
metrics.keys()),
another_engine=trainer),
event_name=Events.EPOCH_COMPLETED)
checkpoint_handler = ModelCheckpoint(log_dir,
'checkpoint',
save_interval=1,
n_saved=3)
trainer.add_event_handler(
Events.EPOCH_COMPLETED, checkpoint_handler,
{'mymodel': getattr(model, 'module', model)
}) # "getattr" takes care of distributed encapsulation
torch.save(args, log_dir + '/model_training_args.bin')
getattr(model, 'module',
model).config.to_json_file(os.path.join(log_dir, CONFIG_NAME))
tokenizer.save_pretrained(log_dir)
# Run the training
trainer.run(train_loader, max_epochs=args.n_epochs)
# On the main process: close tensorboard logger and rename the last checkpoint (for easy re-loading with OpenAIGPTModel.from_pretrained method)
if args.local_rank in [-1, 0] and args.n_epochs > 0:
os.rename(
checkpoint_handler._saved[-1][1][-1],
os.path.join(log_dir, WEIGHTS_NAME)
) # TODO: PR in ignite to have better access to saved file paths (cleaner)
tb_logger.close()