def load_qa_from_pretrained(
model: Optional[tf.keras.Model] = None,
name: Optional[str] = None,
path: Optional[str] = None, # path to checkpoint from TF...ForPreTraining
config: Optional[PretrainedConfig] = None,
) -> tf.keras.Model:
"""
Load a TF...QuestionAnswering model by taking the main layer of a pretrained model.
Preserves the model.config attribute.
"""
assert (bool(name) ^ bool(model) ^ (bool(path) and bool(config))
), "Pass either name, model, or (path and config)"
if name is not None:
return TFAutoModelForQuestionAnswering.from_pretrained(name)
elif model is not None:
pretrained_model = model
elif path is not None:
pretrained_model = TFAutoModelForPreTraining.from_config(config)
pretrained_model.load_weights(path)
qa_model = TFAutoModelForQuestionAnswering.from_config(
pretrained_model.config)
pretrained_main_layer = getattr(pretrained_model,
qa_model.base_model_prefix)
assert (
pretrained_main_layer is not None
), f"{pretrained_model} has no attribute '{model.base_model_prefix}'"
# Generalized way of saying `model.albert = pretrained_model.albert`
setattr(qa_model, qa_model.base_model_prefix, pretrained_main_layer)
return qa_model
def test_model_for_pretraining_from_pretrained(self):
model_name = "bert-base-cased"
config = AutoConfig.from_pretrained(model_name)
self.assertIsNotNone(config)
self.assertIsInstance(config, BertConfig)
model = TFAutoModelForPreTraining.from_pretrained(model_name)
self.assertIsNotNone(model)
self.assertIsInstance(model, TFBertForPreTraining)
def test_model_for_pretraining_from_pretrained(self):
import h5py
self.assertTrue(h5py.version.hdf5_version.startswith("1.10"))
# for model_name in TF_BERT_PRETRAINED_MODEL_ARCHIVE_LIST[:1]:
for model_name in ["bert-base-uncased"]:
config = AutoConfig.from_pretrained(model_name)
self.assertIsNotNone(config)
self.assertIsInstance(config, BertConfig)
model = TFAutoModelForPreTraining.from_pretrained(model_name)
self.assertIsNotNone(model)
self.assertIsInstance(model, TFBertForPreTraining)
def test_model_for_pretraining_from_pretrained(self):
# for model_name in TF_BERT_PRETRAINED_MODEL_ARCHIVE_LIST[:1]:
for model_name in ["bert-base-uncased"]:
config = AutoConfig.from_pretrained(model_name)
self.assertIsNotNone(config)
self.assertIsInstance(config, BertConfig)
model = TFAutoModelForPreTraining.from_pretrained(model_name,
from_pt=True)
self.assertIsNotNone(model)
self.assertIsInstance(model, TFBertForPreTraining)
model = AutoModelForPreTraining.from_pretrained(model_name,
from_tf=True)
self.assertIsNotNone(model)
self.assertIsInstance(model, BertForPreTraining)
def model(self):
from transformers import TFAutoModelForPreTraining
model = TFAutoModelForPreTraining.from_pretrained(
self.pretrained_model_name_or_path)
self.to_device()
return model
def get_model(self):
from transformers import TFAutoModelForPreTraining
_model = TFAutoModelForPreTraining.from_pretrained(
self.pretrained_model_name_or_path)
return _model
def main():
parser = HfArgumentParser((ModelArguments, DataTrainingArguments,
TrainingArguments, LoggingArguments))
model_args, data_args, train_args, log_args = parser.parse_args_into_dataclasses(
)
tf.random.set_seed(train_args.seed)
tf.autograph.set_verbosity(0)
# Settings init
parse_bool = lambda arg: arg == "true"
do_gradient_accumulation = train_args.gradient_accumulation_steps > 1
do_xla = not parse_bool(train_args.skip_xla)
do_eager = parse_bool(train_args.eager)
skip_sop = parse_bool(train_args.skip_sop)
skip_mlm = parse_bool(train_args.skip_mlm)
pre_layer_norm = parse_bool(model_args.pre_layer_norm)
fast_squad = parse_bool(log_args.fast_squad)
dummy_eval = parse_bool(log_args.dummy_eval)
squad_steps = get_squad_steps(log_args.extra_squad_steps)
is_sagemaker = data_args.fsx_prefix.startswith("/opt/ml")
disable_tqdm = is_sagemaker
global max_grad_norm
max_grad_norm = train_args.max_grad_norm
# Horovod init
hvd.init()
gpus = tf.config.list_physical_devices("GPU")
for gpu in gpus:
tf.config.experimental.set_memory_growth(gpu, True)
if gpus:
tf.config.set_visible_devices(gpus[hvd.local_rank()], "GPU")
# XLA, AutoGraph
tf.config.optimizer.set_jit(do_xla)
tf.config.experimental_run_functions_eagerly(do_eager)
if hvd.rank() == 0:
# Run name should only be used on one process to avoid race conditions
current_time = datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
platform = "sm" if is_sagemaker else "eks"
if skip_sop:
loss_str = "-skipsop"
elif skip_mlm:
loss_str = "-skipmlm"
else:
loss_str = ""
metadata = (f"{model_args.model_type}"
f"-{model_args.model_size}"
f"-{model_args.load_from}"
f"-{hvd.size()}gpus"
f"-{train_args.batch_size}batch"
f"-{train_args.gradient_accumulation_steps}accum"
f"-{train_args.learning_rate}maxlr"
f"-{train_args.end_learning_rate}endlr"
f"-{train_args.learning_rate_decay_power}power"
f"-{train_args.max_grad_norm}maxgrad"
f"-{train_args.optimizer}opt"
f"-{train_args.total_steps}steps"
f"-{data_args.max_seq_length}seq"
f"-{data_args.max_predictions_per_seq}preds"
f"-{'preln' if pre_layer_norm else 'postln'}"
f"{loss_str}"
f"-{model_args.hidden_dropout_prob}dropout"
f"-{train_args.seed}seed")
run_name = f"{current_time}-{platform}-{metadata}-{train_args.name if train_args.name else 'unnamed'}"
# Logging should only happen on a single process
# https://stackoverflow.com/questions/9321741/printing-to-screen-and-writing-to-a-file-at-the-same-time
level = logging.INFO
format = "%(asctime)-15s %(name)-12s: %(levelname)-8s %(message)s"
handlers = [
logging.FileHandler(
f"{data_args.fsx_prefix}/logs/albert/{run_name}.log"),
TqdmLoggingHandler(),
]
logging.basicConfig(level=level, format=format, handlers=handlers)
# Check that arguments passed in properly, only after registering the alert_func and logging
assert not (skip_sop
and skip_mlm), "Cannot use --skip_sop and --skip_mlm"
wrap_global_functions(do_gradient_accumulation)
if model_args.model_type == "albert":
model_desc = f"albert-{model_args.model_size}-v2"
elif model_args.model_type == "bert":
model_desc = f"bert-{model_args.model_size}-uncased"
config = AutoConfig.from_pretrained(model_desc)
config.pre_layer_norm = pre_layer_norm
config.hidden_dropout_prob = model_args.hidden_dropout_prob
model = TFAutoModelForPreTraining.from_config(config)
# Create optimizer and enable AMP loss scaling.
schedule = LinearWarmupPolyDecaySchedule(
max_learning_rate=train_args.learning_rate,
end_learning_rate=train_args.end_learning_rate,
warmup_steps=train_args.warmup_steps,
total_steps=train_args.total_steps,
power=train_args.learning_rate_decay_power,
)
if train_args.optimizer == "lamb":
opt = LAMB(
learning_rate=schedule,
weight_decay_rate=0.01,
beta_1=0.9,
beta_2=0.999,
epsilon=1e-6,
exclude_from_weight_decay=["LayerNorm", "layer_norm", "bias"],
)
elif train_args.optimizer == "adam":
opt = AdamW(weight_decay=0.0, learning_rate=schedule)
opt = tf.train.experimental.enable_mixed_precision_graph_rewrite(
opt, loss_scale="dynamic")
gradient_accumulator = GradientAccumulator()
loaded_opt_weights = None
if model_args.load_from == "scratch":
pass
elif model_args.load_from.startswith("huggingface"):
assert (model_args.model_type == "albert"
), "Only loading pretrained albert models is supported"
huggingface_name = f"albert-{model_args.model_size}-v2"
if model_args.load_from == "huggingface":
albert = TFAlbertModel.from_pretrained(huggingface_name,
config=config)
model.albert = albert
else:
model_ckpt, opt_ckpt = get_checkpoint_paths_from_prefix(
model_args.checkpoint_path)
model = TFAutoModelForPreTraining.from_config(config)
if hvd.rank() == 0:
model.load_weights(model_ckpt)
loaded_opt_weights = np.load(opt_ckpt, allow_pickle=True)
# We do not set the weights yet, we have to do a first step to initialize the optimizer.
# Train filenames are [1, 2047], Val filenames are [0]. Note the different subdirectories
# Move to same folder structure and remove if/else
if model_args.model_type == "albert":
train_glob = f"{data_args.fsx_prefix}/albert_pretraining/tfrecords/train/max_seq_len_{data_args.max_seq_length}_max_predictions_per_seq_{data_args.max_predictions_per_seq}_masked_lm_prob_15/albert_*.tfrecord"
validation_glob = f"{data_args.fsx_prefix}/albert_pretraining/tfrecords/validation/max_seq_len_{data_args.max_seq_length}_max_predictions_per_seq_{data_args.max_predictions_per_seq}_masked_lm_prob_15/albert_*.tfrecord"
if model_args.model_type == "bert":
train_glob = f"{data_args.fsx_prefix}/bert_pretraining/max_seq_len_{data_args.max_seq_length}_max_predictions_per_seq_{data_args.max_predictions_per_seq}_masked_lm_prob_15/training/*.tfrecord"
validation_glob = f"{data_args.fsx_prefix}/bert_pretraining/max_seq_len_{data_args.max_seq_length}_max_predictions_per_seq_{data_args.max_predictions_per_seq}_masked_lm_prob_15/validation/*.tfrecord"
train_filenames = glob.glob(train_glob)
validation_filenames = glob.glob(validation_glob)
train_dataset = get_mlm_dataset(
filenames=train_filenames,
max_seq_length=data_args.max_seq_length,
max_predictions_per_seq=data_args.max_predictions_per_seq,
batch_size=train_args.batch_size,
) # Of shape [batch_size, ...]
# Batch of batches, helpful for gradient accumulation. Shape [grad_steps, batch_size, ...]
train_dataset = train_dataset.batch(train_args.gradient_accumulation_steps)
# One iteration with 10 dupes, 8 nodes seems to be 60-70k steps.
train_dataset = train_dataset.prefetch(buffer_size=8)
# Validation should only be done on one node, since Horovod doesn't allow allreduce on a subset of ranks
if hvd.rank() == 0:
validation_dataset = get_mlm_dataset(
filenames=validation_filenames,
max_seq_length=data_args.max_seq_length,
max_predictions_per_seq=data_args.max_predictions_per_seq,
batch_size=train_args.batch_size,
)
# validation_dataset = validation_dataset.batch(1)
validation_dataset = validation_dataset.prefetch(buffer_size=8)
pbar = tqdm.tqdm(train_args.total_steps, disable=disable_tqdm)
summary_writer = None # Only create a writer if we make it through a successful step
logger.info(f"Starting training, job name {run_name}")
i = 0
start_time = time.perf_counter()
for batch in train_dataset:
learning_rate = schedule(step=tf.constant(i, dtype=tf.float32))
loss_scale = opt.loss_scale()
loss, mlm_loss, mlm_acc, sop_loss, sop_acc, grad_norm, weight_norm = train_step(
model=model,
opt=opt,
gradient_accumulator=gradient_accumulator,
batch=batch,
gradient_accumulation_steps=train_args.gradient_accumulation_steps,
skip_sop=skip_sop,
skip_mlm=skip_mlm,
)
# Don't want to wrap broadcast_variables() in a tf.function, can lead to asynchronous errors
if i == 0:
if hvd.rank() == 0 and loaded_opt_weights is not None:
opt.set_weights(loaded_opt_weights)
hvd.broadcast_variables(model.variables, root_rank=0)
hvd.broadcast_variables(opt.variables(), root_rank=0)
i = opt.get_weights()[0] - 1
is_final_step = i >= train_args.total_steps - 1
do_squad = i in squad_steps or is_final_step
# Squad requires all the ranks to train, but results are only returned on rank 0
if do_squad:
squad_results = get_squad_results_while_pretraining(
model=model,
model_size=model_args.model_size,
fsx_prefix=data_args.fsx_prefix,
step=i,
fast=log_args.fast_squad,
dummy_eval=log_args.dummy_eval,
)
if hvd.rank() == 0:
squad_exact, squad_f1 = squad_results["exact"], squad_results[
"f1"]
logger.info(
f"SQuAD step {i} -- F1: {squad_f1:.3f}, Exact: {squad_exact:.3f}"
)
# Re-wrap autograph so it doesn't get arg mismatches
wrap_global_functions(do_gradient_accumulation)
if hvd.rank() == 0:
do_log = i % log_args.log_frequency == 0
do_checkpoint = (
(i > 0) and
(i % log_args.checkpoint_frequency == 0)) or is_final_step
do_validation = (
(i > 0) and
(i % log_args.validation_frequency == 0)) or is_final_step
pbar.update(1)
description = f"Loss: {loss:.3f}, MLM: {mlm_loss:.3f}, SOP: {sop_loss:.3f}, MLM_acc: {mlm_acc:.3f}, SOP_acc: {sop_acc:.3f}"
pbar.set_description(description)
if do_log:
elapsed_time = time.perf_counter() - start_time
if i == 0:
logger.info(f"First step: {elapsed_time:.3f} secs")
else:
it_per_sec = log_args.log_frequency / elapsed_time
logger.info(
f"Train step {i} -- {description} -- It/s: {it_per_sec:.2f}"
)
start_time = time.perf_counter()
if do_checkpoint:
checkpoint_prefix = f"{data_args.fsx_prefix}/checkpoints/albert/{run_name}-step{i}"
model_ckpt = f"{checkpoint_prefix}.ckpt"
opt_ckpt = f"{checkpoint_prefix}-opt.npy"
logger.info(
f"Saving model at {model_ckpt}, optimizer at {opt_ckpt}")
model.save_weights(model_ckpt)
# model.load_weights(model_ckpt)
opt_weights = opt.get_weights()
np.save(opt_ckpt, opt_weights)
# opt.set_weights(opt_weights)
if do_validation:
val_loss, val_mlm_loss, val_mlm_acc, val_sop_loss, val_sop_acc = run_validation(
model=model,
validation_dataset=validation_dataset,
skip_sop=skip_sop,
skip_mlm=skip_mlm,
)
description = f"Loss: {val_loss:.3f}, MLM: {val_mlm_loss:.3f}, SOP: {val_sop_loss:.3f}, MLM_acc: {val_mlm_acc:.3f}, SOP_acc: {val_sop_acc:.3f}"
logger.info(f"Validation step {i} -- {description}")
# Create summary_writer after the first step
if summary_writer is None:
summary_writer = tf.summary.create_file_writer(
f"{data_args.fsx_prefix}/logs/albert/{run_name}")
with summary_writer.as_default():
HP_MODEL_TYPE = hp.HParam("model_type",
hp.Discrete(["albert", "bert"]))
HP_MODEL_SIZE = hp.HParam("model_size",
hp.Discrete(["base", "large"]))
HP_LEARNING_RATE = hp.HParam("learning_rate",
hp.RealInterval(1e-5, 1e-1))
HP_BATCH_SIZE = hp.HParam("global_batch_size",
hp.IntInterval(1, 64))
HP_PRE_LAYER_NORM = hp.HParam("pre_layer_norm",
hp.Discrete([True, False]))
HP_HIDDEN_DROPOUT = hp.HParam("hidden_dropout")
hparams = [
HP_MODEL_TYPE,
HP_MODEL_SIZE,
HP_BATCH_SIZE,
HP_LEARNING_RATE,
HP_PRE_LAYER_NORM,
HP_HIDDEN_DROPOUT,
]
HP_F1 = hp.Metric("squad_f1")
HP_EXACT = hp.Metric("squad_exact")
HP_MLM = hp.Metric("val_mlm_acc")
HP_SOP = hp.Metric("val_sop_acc")
HP_TRAIN_LOSS = hp.Metric("train_loss")
HP_VAL_LOSS = hp.Metric("val_loss")
metrics = [
HP_TRAIN_LOSS, HP_VAL_LOSS, HP_F1, HP_EXACT, HP_MLM,
HP_SOP
]
hp.hparams_config(
hparams=hparams,
metrics=metrics,
)
hp.hparams(
{
HP_MODEL_TYPE: model_args.model_type,
HP_MODEL_SIZE: model_args.model_size,
HP_LEARNING_RATE: train_args.learning_rate,
HP_BATCH_SIZE: train_args.batch_size * hvd.size(),
HP_PRE_LAYER_NORM: model_args.pre_layer_norm
== "true",
HP_HIDDEN_DROPOUT: model_args.hidden_dropout_prob,
},
trial_id=run_name,
)
# Log to TensorBoard
with summary_writer.as_default():
tf.summary.scalar("weight_norm", weight_norm, step=i)
tf.summary.scalar("loss_scale", loss_scale, step=i)
tf.summary.scalar("learning_rate", learning_rate, step=i)
tf.summary.scalar("train_loss", loss, step=i)
tf.summary.scalar("train_mlm_loss", mlm_loss, step=i)
tf.summary.scalar("train_mlm_acc", mlm_acc, step=i)
tf.summary.scalar("train_sop_loss", sop_loss, step=i)
tf.summary.scalar("train_sop_acc", sop_acc, step=i)
tf.summary.scalar("grad_norm", grad_norm, step=i)
if do_validation:
tf.summary.scalar("val_loss", val_loss, step=i)
tf.summary.scalar("val_mlm_loss", val_mlm_loss, step=i)
tf.summary.scalar("val_mlm_acc", val_mlm_acc, step=i)
tf.summary.scalar("val_sop_loss", val_sop_loss, step=i)
tf.summary.scalar("val_sop_acc", val_sop_acc, step=i)
if do_squad:
tf.summary.scalar("squad_f1", squad_f1, step=i)
tf.summary.scalar("squad_exact", squad_exact, step=i)
i += 1
if is_final_step:
break
if hvd.rank() == 0:
pbar.close()
logger.info(f"Finished pretraining, job name {run_name}")
def main(
fsx_prefix: str,
model_type: str,
model_size: str,
batch_size: int,
max_seq_length: int,
gradient_accumulation_steps: int,
optimizer: str,
name: str,
learning_rate: float,
end_learning_rate: float,
warmup_steps: int,
total_steps: int,
skip_sop: bool,
skip_mlm: bool,
pre_layer_norm: bool,
fast_squad: bool,
dummy_eval: bool,
squad_steps: List[int],
hidden_dropout_prob: float,
):
# Hard-coded values that don't need to be arguments
max_predictions_per_seq = 20
log_frequency = 1000
checkpoint_frequency = 5000
validate_frequency = 2000
histogram_frequency = 100
do_gradient_accumulation = gradient_accumulation_steps > 1
if hvd.rank() == 0:
# Run name should only be used on one process to avoid race conditions
current_time = datetime.datetime.now().strftime("%Y%m%d-%H%M%S")
platform = "eks" if args.fsx_prefix == "/fsx" else "sm"
if skip_sop:
loss_str = "-skipsop"
elif skip_mlm:
loss_str = "-skipmlm"
else:
loss_str = ""
amp_str = ("-skipamp"
if not tf.config.optimizer.get_experimental_options().get(
"auto_mixed_precision", False) else "")
ln_str = "-preln" if pre_layer_norm else "-postln"
dropout_str = f"-{hidden_dropout_prob}dropout" if hidden_dropout_prob != 0 else ""
name_str = f"-{name}" if name else ""
metadata = f"{model_type}-{model_size}-{args.load_from}-{hvd.size()}gpus-{batch_size}batch-{gradient_accumulation_steps}accum-{learning_rate}lr-{args.max_grad_norm}maxgrad-{optimizer}opt-{total_steps}steps-{max_seq_length}seq{amp_str}{ln_str}{loss_str}{dropout_str}{name_str}"
run_name = f"{current_time}-{platform}-{metadata}"
# Logging should only happen on a single process
# https://stackoverflow.com/questions/9321741/printing-to-screen-and-writing-to-a-file-at-the-same-time
level = logging.INFO
format = "%(asctime)-15s %(name)-12s: %(levelname)-8s %(message)s"
handlers = [
logging.FileHandler(f"{fsx_prefix}/logs/albert/{run_name}.log"),
logging.StreamHandler(),
]
logging.basicConfig(level=level, format=format, handlers=handlers)
# Check that arguments passed in properly, only after registering the alert_func and logging
assert not (skip_sop
and skip_mlm), "Cannot use --skip_sop and --skip_mlm"
wrap_global_functions(do_gradient_accumulation)
if model_type == "albert":
model_desc = f"albert-{model_size}-v2"
elif model_type == "bert":
model_desc = f"bert-{model_size}-uncased"
config = AutoConfig.from_pretrained(model_desc)
config.pre_layer_norm = pre_layer_norm
config.output_hidden_states = True
config.hidden_dropout_prob = hidden_dropout_prob
model = TFAutoModelForPreTraining.from_config(config)
if args.load_from == "scratch":
pass
else:
assert model_type == "albert", "Only loading pretrained albert models is supported"
huggingface_name = f"albert-{model_size}-v2"
if args.load_from == "huggingface":
albert = TFAlbertModel.from_pretrained(huggingface_name,
config=config)
model.albert = albert
elif args.load_from == "huggingfacepreds":
mlm_model = TFAlbertForMaskedLM.from_pretrained(huggingface_name,
config=config)
model.albert = mlm_model.albert
model.cls.predictions = mlm_model.predictions
tokenizer = get_tokenizer()
schedule = LinearWarmupLinearDecaySchedule(
max_learning_rate=learning_rate,
end_learning_rate=end_learning_rate,
warmup_steps=warmup_steps,
total_steps=total_steps,
)
if optimizer == "lamb":
opt = LAMB(
learning_rate=schedule,
weight_decay_rate=0.01,
beta_1=0.9,
beta_2=0.999,
epsilon=1e-6,
exclude_from_weight_decay=["LayerNorm", "layer_norm", "bias"],
)
elif optimizer == "adam":
opt = AdamW(weight_decay=0.0, learning_rate=schedule)
opt = tf.keras.mixed_precision.experimental.LossScaleOptimizer(
opt, loss_scale="dynamic")
gradient_accumulator = GradientAccumulator()
# Train filenames are [1, 2047]
# Val filenames are [0]
# Note the different subdirectories
train_glob = f"{fsx_prefix}/albert_pretraining/tfrecords/train/max_seq_len_{max_seq_length}_max_predictions_per_seq_{max_predictions_per_seq}_masked_lm_prob_15/albert_*.tfrecord"
validation_glob = f"{fsx_prefix}/albert_pretraining/tfrecords/validation/max_seq_len_{max_seq_length}_max_predictions_per_seq_{max_predictions_per_seq}_masked_lm_prob_15/albert_*.tfrecord"
train_filenames = glob.glob(train_glob)
validation_filenames = glob.glob(validation_glob)
train_dataset = get_mlm_dataset(
filenames=train_filenames,
max_seq_length=max_seq_length,
max_predictions_per_seq=max_predictions_per_seq,
batch_size=batch_size,
) # Of shape [batch_size, ...]
train_dataset = train_dataset.batch(
gradient_accumulation_steps
) # Batch of batches, helpful for gradient accumulation. Shape [grad_steps, batch_size, ...]
# train_dataset = (
# train_dataset.repeat()
# ) # One iteration with 10 dupes, 8 nodes seems to be 60-70k steps.
train_dataset = train_dataset.prefetch(buffer_size=8)
# Validation should only be done on one node, since Horovod doesn't allow allreduce on a subset of ranks
if hvd.rank() == 0:
validation_dataset = get_mlm_dataset(
filenames=validation_filenames,
max_seq_length=max_seq_length,
max_predictions_per_seq=max_predictions_per_seq,
batch_size=batch_size,
)
# validation_dataset = validation_dataset.batch(1)
validation_dataset = validation_dataset.prefetch(buffer_size=8)
pbar = tqdm.tqdm(total_steps)
summary_writer = None # Only create a writer if we make it through a successful step
if hvd.rank() == 0:
logger.info(f"Starting training, job name {run_name}")
for i, batch in enumerate(train_dataset):
learning_rate = schedule(step=tf.constant(i, dtype=tf.float32))
loss, mlm_loss, mlm_acc, sop_loss, sop_acc, grad_norm = train_step(
model=model,
opt=opt,
gradient_accumulator=gradient_accumulator,
batch=batch,
gradient_accumulation_steps=gradient_accumulation_steps,
skip_sop=skip_sop,
skip_mlm=skip_mlm,
)
# Don't want to wrap broadcast_variables() in a tf.function, can lead to asynchronous errors
if i == 0:
hvd.broadcast_variables(model.variables, root_rank=0)
hvd.broadcast_variables(opt.variables(), root_rank=0)
is_final_step = i >= total_steps - 1
do_squad = i in squad_steps or is_final_step
# Squad requires all the ranks to train, but results are only returned on rank 0
if do_squad:
squad_results = get_squad_results(
model=model,
model_size=model_size,
step=i,
fast=fast_squad,
dummy_eval=dummy_eval,
)
if hvd.rank() == 0:
squad_exact, squad_f1 = squad_results["exact"], squad_results[
"f1"]
logger.info(
f"SQuAD step {i} -- F1: {squad_f1:.3f}, Exact: {squad_exact:.3f}"
)
# Re-wrap autograph so it doesn't get arg mismatches
wrap_global_functions(do_gradient_accumulation)
if hvd.rank() == 0:
do_log = i % log_frequency == 0
do_checkpoint = (i % checkpoint_frequency == 0) or is_final_step
do_validation = (i % validate_frequency == 0) or is_final_step
pbar.update(1)
description = f"Loss: {loss:.3f}, MLM: {mlm_loss:.3f}, SOP: {sop_loss:.3f}, MLM_acc: {mlm_acc:.3f}, SOP_acc: {sop_acc:.3f}"
pbar.set_description(description)
if do_log:
logger.info(f"Train step {i} -- {description}")
if do_checkpoint:
checkpoint_path = f"{fsx_prefix}/checkpoints/albert/{run_name}-step{i}.ckpt"
logger.info(f"Saving checkpoint at {checkpoint_path}")
model.save_weights(checkpoint_path)
# model.load_weights(checkpoint_path)
if do_validation:
val_loss, val_mlm_loss, val_mlm_acc, val_sop_loss, val_sop_acc = run_validation(
model=model,
validation_dataset=validation_dataset,
skip_sop=skip_sop,
skip_mlm=skip_mlm,
)
description = f"Loss: {val_loss:.3f}, MLM: {val_mlm_loss:.3f}, SOP: {val_sop_loss:.3f}, MLM_acc: {val_mlm_acc:.3f}, SOP_acc: {val_sop_acc:.3f}"
logger.info(f"Validation step {i} -- {description}")
# Create summary_writer after the first step
if summary_writer is None:
summary_writer = tf.summary.create_file_writer(
f"{fsx_prefix}/logs/albert/{run_name}")
# Log to TensorBoard
weight_norm = tf.math.sqrt(
tf.math.reduce_sum([
tf.norm(var, ord=2)**2 for var in model.trainable_variables
]))
with summary_writer.as_default():
tf.summary.scalar("weight_norm", weight_norm, step=i)
tf.summary.scalar("learning_rate", learning_rate, step=i)
tf.summary.scalar("train_loss", loss, step=i)
tf.summary.scalar("train_mlm_loss", mlm_loss, step=i)
tf.summary.scalar("train_mlm_acc", mlm_acc, step=i)
tf.summary.scalar("train_sop_loss", sop_loss, step=i)
tf.summary.scalar("train_sop_acc", sop_acc, step=i)
tf.summary.scalar("grad_norm", grad_norm, step=i)
if do_validation:
tf.summary.scalar("val_loss", val_loss, step=i)
tf.summary.scalar("val_mlm_loss", val_mlm_loss, step=i)
tf.summary.scalar("val_mlm_acc", val_mlm_acc, step=i)
tf.summary.scalar("val_sop_loss", val_sop_loss, step=i)
tf.summary.scalar("val_sop_acc", val_sop_acc, step=i)
if do_squad:
tf.summary.scalar("squad_f1", squad_f1, step=i)
tf.summary.scalar("squad_exact", squad_exact, step=i)
if is_final_step:
break
if hvd.rank() == 0:
pbar.close()
logger.info(f"Finished pretraining, job name {run_name}")