def load(cls, pretrained_model_name_or_path, language=None, **kwargs):
"""
Load a language model either by supplying
* the name of a remote model on s3 ("roberta-base" ...)
* or a local path of a model trained via transformers ("some_dir/huggingface_model")
* or a local path of a model trained via FARM ("some_dir/farm_model")
:param pretrained_model_name_or_path: name or path of a model
:param language: (Optional) Name of language the model was trained for (e.g. "german").
If not supplied, FARM will try to infer it from the model name.
:return: Language Model
"""
roberta = cls()
if "farm_lm_name" in kwargs:
roberta.name = kwargs["farm_lm_name"]
else:
roberta.name = pretrained_model_name_or_path
# We need to differentiate between loading model using FARM format and Pytorch-Transformers format
farm_lm_config = Path(pretrained_model_name_or_path) / "language_model_config.json"
if os.path.exists(farm_lm_config):
# FARM style
config = RobertaConfig.from_pretrained(farm_lm_config)
farm_lm_model = Path(pretrained_model_name_or_path) / "language_model.bin"
roberta.model = RobertaModel.from_pretrained(farm_lm_model, config=config, **kwargs)
roberta.language = roberta.model.config.language
else:
# Huggingface transformer Style
roberta.model = RobertaModel.from_pretrained(str(pretrained_model_name_or_path), **kwargs)
roberta.language = cls._infer_language_from_name(pretrained_model_name_or_path)
return roberta
def __init__(self, bert_dir):
super().__init__()
self.bert_config = RobertaConfig.from_pretrained(bert_dir, output_hidden_states=False)
self.intermediate = RobertaModel.from_pretrained(bert_dir)
self.span_info_collect = SICModel(self.bert_config.hidden_size)
self.interpretation = InterpretationModel(self.bert_config.hidden_size)
self.output = nn.Linear(self.bert_config.hidden_size, self.bert_config.num_labels)
def convert_pytorch_to_roberta_checkpoint(pytorch_checkpoint_path: str,
roberta_dump_folder_path: str):
"""
Copy/paste/tweak roberta's weights to our BERT structure.
"""
import pickle
model = RobertaForMaskedLM.from_pretrained(pytorch_checkpoint_path)
config = RobertaConfig.from_pretrained(pytorch_checkpoint_path)
from argparse import Namespace
huggingface_train_args = Namespace(
**vars(torch.load(f"{pytorch_checkpoint_path}/training_args.bin")))
model.eval() # disable dropout
# tokenizer = RobertaTokenizer.from_pretrained(roberta_checkpoint_path)
if config.num_hidden_layers == 12:
roberta = FairseqRobertaModel.from_pretrained("roberta.base")
elif config.num_hidden_layers == 24:
roberta = FairseqRobertaModel.from_pretrained("roberta.large")
else:
raise Exception("Only roberta LM is supported!")
roberta.eval()
# roberta_sent_encoder = roberta.model.decoder.sentence_encoder
# update config from huggingface and reuse lots of settings from fairseq pretrained
roberta.args.warmup_updates = huggingface_train_args.warmup_steps
roberta.args.weight_decay = huggingface_train_args.weight_decay
roberta.args.adam_eps = huggingface_train_args.adam_epsilon
roberta.args.clip_norm = huggingface_train_args.max_grad_norm
roberta.args.max_update = huggingface_train_args.max_steps
roberta.args.total_num_update = huggingface_train_args.max_steps
roberta.args.save_interval_updates = huggingface_train_args.save_steps
roberta.args.attention_dropout = config.attention_probs_dropout_prob
roberta.args.encoder_embed_dim = config.hidden_size
roberta.args.encoder_ffn_embed_dim = config.intermediate_size
roberta.args.activation_fn = config.hidden_act
roberta.args.activation_dropout = config.hidden_dropout_prob
roberta.args.encoder_layers = config.num_hidden_layers
roberta.args.encoder_attention_heads = config.num_attention_heads
roberta.args.__dict__.update(huggingface_train_args.__dict__)
roberta.model.decoder.sentence_encoder.embed_tokens.weight = model.roberta.embeddings.word_embeddings.weight
roberta.model.decoder.sentence_encoder.embed_positions.weight = model.roberta.embeddings.position_embeddings.weight
model.roberta.embeddings.token_type_embeddings.weight.data = torch.zeros_like(
model.roberta.embeddings.token_type_embeddings.weight
) # just zero them out b/c RoBERTa doesn't use them.
roberta.model.decoder.sentence_encoder.emb_layer_norm.weight = model.roberta.embeddings.LayerNorm.weight
roberta.model.decoder.sentence_encoder.emb_layer_norm.bias = model.roberta.embeddings.LayerNorm.bias
for i in range(config.num_hidden_layers):
# Encoder: start of layer
layer: BertLayer = model.roberta.encoder.layer[i]
# roberta.model.decoder.sentence_encoder.layers[i]: TransformerSentenceEncoderLayer = roberta.model.decoder.sentence_encoder.layers[i]
# self attention
self_attn: BertSelfAttention = layer.attention.self
assert (roberta.model.decoder.sentence_encoder.layers[i].self_attn.
k_proj.weight.data.shape == roberta.model.decoder.
sentence_encoder.layers[i].self_attn.q_proj.weight.data.shape
== roberta.model.decoder.sentence_encoder.layers[i].self_attn.
v_proj.weight.data.shape == torch.Size(
(config.hidden_size, config.hidden_size)))
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.q_proj.weight = self_attn.query.weight
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.q_proj.bias = self_attn.query.bias
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.k_proj.weight = self_attn.key.weight
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.k_proj.bias = self_attn.key.bias
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.v_proj.weight = self_attn.value.weight
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.v_proj.bias = self_attn.value.bias
# self-attention output
self_output: BertSelfOutput = layer.attention.output
assert self_output.dense.weight.shape == roberta.model.decoder.sentence_encoder.layers[
i].self_attn.out_proj.weight.shape
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.out_proj.weight = self_output.dense.weight
roberta.model.decoder.sentence_encoder.layers[
i].self_attn.out_proj.bias = self_output.dense.bias
roberta.model.decoder.sentence_encoder.layers[
i].self_attn_layer_norm.weight = self_output.LayerNorm.weight
roberta.model.decoder.sentence_encoder.layers[
i].self_attn_layer_norm.bias = self_output.LayerNorm.bias
# intermediate
intermediate: BertIntermediate = layer.intermediate
assert intermediate.dense.weight.shape == roberta.model.decoder.sentence_encoder.layers[
i].fc1.weight.shape
roberta.model.decoder.sentence_encoder.layers[
i].fc1.weight = intermediate.dense.weight
roberta.model.decoder.sentence_encoder.layers[
i].fc1.bias = intermediate.dense.bias
# output
bert_output: BertOutput = layer.output
assert bert_output.dense.weight.shape == roberta.model.decoder.sentence_encoder.layers[
i].fc2.weight.shape
roberta.model.decoder.sentence_encoder.layers[
i].fc2.weight = bert_output.dense.weight
roberta.model.decoder.sentence_encoder.layers[
i].fc2.bias = bert_output.dense.bias
roberta.model.decoder.sentence_encoder.layers[
i].final_layer_norm.weight = bert_output.LayerNorm.weight
roberta.model.decoder.sentence_encoder.layers[
i].final_layer_norm.bias = bert_output.LayerNorm.bias
# LM Head
roberta.model.decoder.lm_head.dense.weight = model.lm_head.dense.weight
roberta.model.decoder.lm_head.dense.bias = model.lm_head.dense.bias
roberta.model.decoder.lm_head.layer_norm.weight = model.lm_head.layer_norm.weight
roberta.model.decoder.lm_head.layer_norm.bias = model.lm_head.layer_norm.bias
roberta.model.decoder.lm_head.weight = model.lm_head.decoder.weight
roberta.model.decoder.lm_head.bias = model.lm_head.decoder.bias
input_ids: torch.Tensor = roberta.encode(SAMPLE_TEXT).unsqueeze(
0) # batch of size 1
their_output = model(input_ids)[0]
our_output = roberta.model(input_ids)[0]
print(our_output.shape, their_output.shape)
max_absolute_diff = torch.max(torch.abs(our_output - their_output)).item()
print(f"max_absolute_diff = {max_absolute_diff}") # ~ 1e-7
copy_success = torch.allclose(our_output, their_output, atol=1e-3)
print("Do both models output the same tensors?",
"🔥" if copy_success else "💩")
if not copy_success:
raise Exception("Something went wRoNg")
pathlib.Path(roberta_dump_folder_path).mkdir(parents=True, exist_ok=True)
print(f"Saving model to {roberta_dump_folder_path}")
from fairseq import checkpoint_utils
state_dict = {
"args":
roberta.args,
"model":
roberta.model.state_dict(),
# these last two were copied from fairseq pretrained just to make .from_pretrain() function works
"extra_state": {
'train_iterator': {
'epoch': 0
},
'val_loss': 1.4955725940408326
},
"optimizer_history": [{
'criterion_name': 'MaskedLmLoss',
'optimizer_name': 'MemoryEfficientFP16Optimizer',
'lr_scheduler_state': {
'best': 1.495530066777925
},
'num_updates': 500000
}]
}
from fairseq import checkpoint_utils
# checkpoint_utils.save_state(f"{roberta_dump_folder_path}/model.pt", roberta.args, roberta.state_dict(), )
# del model
checkpoint_utils.torch_persistent_save(
state_dict, f"{roberta_dump_folder_path}/model.pt")
loaded_model = FairseqRobertaModel.from_pretrained(
roberta_dump_folder_path)
loaded_model.eval()
# roberta.model(input_ids)
# loaded_model.model(input_ids)
del state_dict
copied_dict = roberta.state_dict()
loaded_dict = loaded_model.state_dict()
assert loaded_model.state_dict().keys() == roberta.state_dict().keys()
for k in roberta.state_dict().keys():
loaded_val = loaded_dict[k]
copied_val = copied_dict[k]
if not torch.allclose(loaded_val, copied_val, atol=1e-3):
print(k)
loaded_output = loaded_model.model(input_ids)[0]
save_success = torch.allclose(our_output, loaded_output, atol=1e-3)
print("Do both models output the same tensors?",
"🔥" if save_success else "💩")
if not save_success:
raise Exception("Something went wRoNg")
# except:
# print("Fail to save")
# torch.save(roberta, f"{roberta_dump_folder_path}/model.pt")
print("Done")
def main():
parser = ArgumentParser()
parser.add_argument('--pregenerated_neg_data', type=Path, required=True)
parser.add_argument('--pregenerated_pos_data', type=Path, required=True)
parser.add_argument('--validation_neg_data', type=Path, required=True)
parser.add_argument('--validation_pos_data', type=Path, required=True)
parser.add_argument('--pregenerated_data', type=Path, required=True)
parser.add_argument('--output_dir', type=Path, required=True)
parser.add_argument('--exp_group', type=str, required=True)
parser.add_argument(
"--bert_model",
type=str,
required=True,
help="Bert pre-trained model selected in the list: bert-base-uncased, "
"bert-large-uncased, bert-base-cased, bert-base-multilingual, bert-base-chinese."
)
parser.add_argument("--method",
type=str,
choices=[
'neg_samebatch', 'distill_samebatch',
'distill_samebatch_lstm', 'distill', 'kl',
'unlikelihood'
])
parser.add_argument("--do_lower_case", action="store_true")
parser.add_argument("--save_before", action='store_true')
parser.add_argument(
"--reduce_memory",
action="store_true",
help=
"Store training data as on-disc memmaps to massively reduce memory usage"
)
parser.add_argument("--max_seq_len", default=512, type=int)
parser.add_argument(
'--overwrite_cache',
action='store_true',
help="Overwrite the cached training and evaluation sets")
parser.add_argument("--epochs",
type=int,
default=3,
help="Number of epochs to train for")
parser.add_argument("--local_rank",
type=int,
default=-1,
help="local_rank for distributed training on gpus")
parser.add_argument("--port_idx", type=int)
parser.add_argument("--no_cuda",
action='store_true',
help="Whether not to use CUDA when available")
parser.add_argument(
'--gradient_accumulation_steps',
type=int,
default=1,
help=
"Number of updates steps to accumulate before performing a backward/update pass."
)
parser.add_argument("--train_batch_size",
default=32,
type=int,
help="Total batch size for training.")
parser.add_argument("--valid_batch_size",
default=64,
type=int,
help="Total batch size for training.")
parser.add_argument("--kr_freq", default=0.0, type=float)
parser.add_argument("--mlm_freq", default=0, type=float)
parser.add_argument("--kl_w", default=1000, type=float)
parser.add_argument("--ul_w", default=1, type=float)
parser.add_argument("--gamma",
default=0.5,
type=float,
help="coeff of UL and 1-coeff of LL")
parser.add_argument('--no_mlm',
action='store_true',
help="don't do any MLM training")
parser.add_argument("--no_tie",
action='store_true',
help="Whether not to use CUDA when available")
parser.add_argument('--no_ul',
action='store_true',
help="don't do any UL training")
parser.add_argument('--no_ll',
action='store_true',
help="don't do any LL training")
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='O1',
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(
'--loss_scale',
type=float,
default=0,
help=
"Loss scaling to improve fp16 numeric stability. Only used when fp16 set to True.\n"
"0 (default value): dynamic loss scaling.\n"
"Positive power of 2: static loss scaling value.\n")
parser.add_argument("--max_grad_norm",
default=1.0,
type=float,
help="Max gradient norm.")
parser.add_argument("--warmup_steps",
default=0,
type=int,
help="Linear warmup over warmup_steps.")
parser.add_argument("--adam_epsilon",
default=1e-8,
type=float,
help="Epsilon for Adam optimizer.")
parser.add_argument("--learning_rate",
default=1e-5,
type=float,
help="The initial learning rate for Adam.")
parser.add_argument('--seed',
type=int,
default=42,
help="random seed for initialization")
args = parser.parse_args()
assert args.pregenerated_data.is_dir(), \
"--pregenerated_data should point to the folder of files made by pregenerate_training_data.py!"
samples_per_epoch = []
for i in range(args.epochs):
epoch_file = args.pregenerated_data / f"epoch_{i}.json"
metrics_file = args.pregenerated_data / f"epoch_{i}_metrics.json"
if epoch_file.is_file() and metrics_file.is_file():
metrics = json.loads(metrics_file.read_text())
samples_per_epoch.append(metrics['num_training_examples'])
else:
if i == 0:
exit("No training data was found!")
print(
f"Warning! There are fewer epochs of pregenerated data ({i}) than training epochs ({args.epochs})."
)
print(
"This script will loop over the available data, but training diversity may be negatively impacted."
)
num_data_epochs = i
break
else:
num_data_epochs = args.epochs
if args.local_rank == -1 or args.no_cuda:
print(torch.cuda.is_available())
device = torch.device("cuda" if torch.cuda.is_available()
and not args.no_cuda else "cpu")
n_gpu = torch.cuda.device_count()
print("Num of gpus: ", n_gpu)
else:
torch.cuda.set_device(args.local_rank)
device = torch.device("cuda", args.local_rank)
print("GPU Device: ", device)
n_gpu = 1
dist_comms.init_distributed_training(args.local_rank, args.port_idx)
# Initializes the distributed backend which will take care of sychronizing nodes/GPUs
logging.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)
pt_output = Path(getenv('PT_OUTPUT_DIR', ''))
args.output_dir = Path(os.path.join(pt_output, args.output_dir))
if args.output_dir.is_dir() and list(args.output_dir.iterdir()):
logging.warning(
f"Output directory ({args.output_dir}) already exists and is not empty!"
)
args.output_dir.mkdir(parents=True, exist_ok=True)
if args.bert_model != "roberta-base":
tokenizer = BertTokenizer.from_pretrained(
args.bert_model, do_lower_case=args.do_lower_case)
else:
tokenizer = RobertaTokenizer.from_pretrained(
args.bert_model, do_lower_case=args.do_lower_case)
tokenizer.vocab = tokenizer.encoder
total_train_examples = 0
for i in range(args.epochs):
# The modulo takes into account the fact that we may loop over limited epochs of data
total_train_examples += samples_per_epoch[i % len(samples_per_epoch)]
num_train_optimization_steps = int(total_train_examples /
args.train_batch_size /
args.gradient_accumulation_steps)
if args.local_rank != -1:
num_train_optimization_steps = num_train_optimization_steps // torch.distributed.get_world_size(
)
# Prepare model
if args.bert_model != "roberta-base":
if args.method == "neg_samebatch":
config = BertConfig.from_pretrained(args.bert_model)
config.bert_model = args.bert_model
core_model = BertForNegSameBatch.from_pretrained(args.bert_model,
args.gamma,
config=config)
core_model.init_orig_bert()
elif args.method == "unlikelihood":
config = BertConfig.from_pretrained(args.bert_model)
core_model = BertForNegPreTraining.from_pretrained(args.bert_model,
config=config)
else:
raise NotImplementedError(
f"method {args.method} is not implemented")
else:
config = RobertaConfig.from_pretrained(args.bert_model)
core_model = RobertaForNegPreTraining.from_pretrained(args.bert_model)
core_model = core_model.to(device)
# Prepare optimizer
param_optimizer = list(core_model.named_parameters())
no_decay = ['bias', 'LayerNorm.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=args.warmup_steps,
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 fp16 training."
)
core_model, optimizer = amp.initialize(core_model,
optimizer,
opt_level=args.fp16_opt_level)
model = torch.nn.parallel.DistributedDataParallel(
core_model,
device_ids=[args.local_rank],
output_device=args.local_rank,
find_unused_parameters=True)
global_step = 0
logging.info("***** Running training *****")
logging.info(f" Num examples = {total_train_examples}")
logging.info(" Batch size = %d", args.train_batch_size)
logging.info(" Num steps = %d", num_train_optimization_steps)
model.train()
if args.local_rank == 0 or args.local_rank == -1:
if args.save_before:
before_train_path = Path(
os.path.join(args.output_dir, "before_training"))
print("Before training path: ", before_train_path)
before_train_path.mkdir(parents=True, exist_ok=True)
model.module.save_pretrained(
os.path.join(args.output_dir, "before_training"))
tokenizer.save_pretrained(
os.path.join(args.output_dir, "before_training"))
# writer = SummaryWriter(log_dir=args.output_dir)
wandb.init(project="neg_v2",
name=str(args.output_dir).split("/")[-1],
group=args.exp_group,
entity='negation')
mlm_averagemeter = AverageMeter()
ul_averagemeter = AverageMeter()
ll_averagemeter = AverageMeter()
kl_averagemeter = AverageMeter()
neg_epoch_dataset = PregeneratedDataset(
epoch=0,
training_path=args.pregenerated_neg_data,
tokenizer=tokenizer,
num_data_epochs=num_data_epochs,
reduce_memory=args.reduce_memory)
pos_epoch_dataset = PregeneratedDataset(
epoch=0,
training_path=args.pregenerated_pos_data,
tokenizer=tokenizer,
num_data_epochs=num_data_epochs,
reduce_memory=args.reduce_memory)
neg_validation_dataset = PregeneratedDataset(
epoch=0,
training_path=args.validation_neg_data,
tokenizer=tokenizer,
num_data_epochs=num_data_epochs,
reduce_memory=args.reduce_memory)
pos_validation_dataset = PregeneratedDataset(
epoch=0,
training_path=args.validation_pos_data,
tokenizer=tokenizer,
num_data_epochs=num_data_epochs,
reduce_memory=args.reduce_memory)
if args.local_rank == -1:
neg_train_sampler = RandomSampler(neg_epoch_dataset)
pos_train_sampler = RandomSampler(pos_epoch_dataset)
neg_valid_sampler = RandomSampler(neg_validation_dataset)
pos_valid_sampler = RandomSampler(pos_validation_dataset)
else:
neg_train_sampler = DistributedSampler(neg_epoch_dataset)
pos_train_sampler = DistributedSampler(pos_epoch_dataset)
neg_valid_sampler = DistributedSampler(neg_validation_dataset)
pos_valid_sampler = DistributedSampler(pos_validation_dataset)
neg_train_dataloader = DataLoader(neg_epoch_dataset,
sampler=neg_train_sampler,
batch_size=args.train_batch_size)
pos_train_dataloader = DataLoader(pos_epoch_dataset,
sampler=pos_train_sampler,
batch_size=args.train_batch_size)
neg_valid_dataloader = DataLoader(neg_validation_dataset,
sampler=neg_valid_sampler,
batch_size=args.valid_batch_size)
pos_valid_dataloader = DataLoader(pos_validation_dataset,
sampler=pos_valid_sampler,
batch_size=args.valid_batch_size)
def inf_train_gen():
while True:
for kr_step, kr_batch in enumerate(neg_train_dataloader):
yield kr_step, kr_batch
kr_gen = inf_train_gen()
def pos_inf_train_gen():
while True:
for kr_step, kr_batch in enumerate(pos_train_dataloader):
yield kr_step, kr_batch
pos_kr_gen = pos_inf_train_gen()
mlm_loss, neg_loss = 0, 0
mlm_nb_it, neg_nb_it = 1, 1
mlm_nb_ex, neg_nb_ex = 0, 0
for epoch in range(args.epochs):
epoch_dataset = PregeneratedDataset(
epoch=epoch,
training_path=args.pregenerated_data,
tokenizer=tokenizer,
num_data_epochs=num_data_epochs,
reduce_memory=args.reduce_memory)
if args.local_rank == -1:
train_sampler = RandomSampler(epoch_dataset)
else:
train_sampler = DistributedSampler(epoch_dataset)
train_dataloader = DataLoader(epoch_dataset,
sampler=train_sampler,
batch_size=args.train_batch_size)
tr_loss = 0
nb_tr_examples, nb_tr_steps = 0, 0
ul_tr_loss = 0
nb_ul_tr_examples, nb_ul_tr_steps = 0, 1
ll_tr_loss = 0
nb_ll_tr_examples, nb_ll_tr_steps = 0, 1
kl_tr_loss = 0
nb_kl_tr_examples, nb_kl_tr_steps = 0, 1
if n_gpu > 1 and args.local_rank == -1 or (n_gpu <= 1
and args.local_rank == 0):
logging.info("** ** * Saving fine-tuned model ** ** * ")
model.module.save_pretrained(args.output_dir)
tokenizer.save_pretrained(args.output_dir)
with tqdm(total=len(train_dataloader), desc=f"Epoch {epoch}") as pbar:
for step, batch in enumerate(train_dataloader):
if not args.no_mlm and (random.random() > args.mlm_freq):
model.train()
batch = tuple(t.to(device) for t in batch)
input_ids, input_mask, segment_ids, lm_label_ids = batch
outputs = model(input_ids=input_ids,
attention_mask=input_mask,
token_type_ids=segment_ids,
masked_lm_labels=lm_label_ids,
negated=False)
loss = outputs[1]
loss_dict = outputs[0]
mlm_loss += loss_dict['mlm'].item()
mlm_nb_it += 1
mlm_nb_ex += input_ids.size(0)
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
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)
tr_loss += loss.item()
if args.local_rank == 0 or args.local_rank == -1:
mlm_averagemeter.update(loss_dict['mlm'].item())
# writer.add_scalar('MLM/train', loss_dict['mlm'].item(), mlm_nb_it)
wandb.log({'MLM/train': loss_dict['mlm'].item()})
nb_tr_steps += 1
nb_ll_tr_steps += 1
mean_loss = tr_loss * args.gradient_accumulation_steps / nb_tr_steps
pbar.set_postfix_str(
f"MLM: {mlm_averagemeter:.6f}, UL: {ul_averagemeter:.6f}, LL: {ll_averagemeter:.6f}, KL: {kl_averagemeter:.6f}"
)
if (step + 1) % args.gradient_accumulation_steps == 0:
scheduler.step() # Update learning rate schedule
optimizer.step()
optimizer.zero_grad()
global_step += 1
pbar.update(1)
random_num = random.random()
if random_num > args.kr_freq:
if args.method in ["neg_samebatch"]:
ul_step, ul_batch = next(kr_gen)
ul_batch = tuple(t.to(device) for t in ul_batch)
ul_input_ids, ul_input_mask, ul_segment_ids, ul_lm_label_ids = ul_batch
ll_step, ll_batch = next(pos_kr_gen)
ll_batch = tuple(t.to(device) for t in ll_batch)
ll_input_ids, ll_input_mask, ll_segment_ids, ll_lm_label_ids = ll_batch
batch_mask = torch.zeros(
(ul_input_ids.size(0) + ll_input_ids.size(0)),
dtype=ll_input_mask.dtype,
device=device)
batch_mask[:ul_input_ids.size(0)] = 1.
outputs = model(
input_ids=torch.cat([ul_input_ids, ll_input_ids],
0),
attention_mask=torch.cat(
[ul_input_mask, ll_input_mask], 0),
token_type_ids=torch.cat(
[ul_segment_ids, ll_segment_ids], 0),
masked_lm_labels=torch.cat(
[ul_lm_label_ids, ll_lm_label_ids], 0),
negated=True,
batch_neg_mask=batch_mask)
loss = outputs[1] * args.ul_w
loss_dict = outputs[0]
if args.local_rank == 0 or args.local_rank == -1:
wandb.log({
'UL/train': loss_dict['neg'].item(),
'LL/train': loss_dict['pos'].item()
})
ul_averagemeter.update(loss_dict['neg'].item())
ll_averagemeter.update(loss_dict['pos'].item())
neg_nb_it += 1
elif random.random() > 0.5 and not args.no_ul:
kr_step, kr_batch = next(kr_gen)
kr_batch = tuple(t.to(device) for t in kr_batch)
input_ids, input_mask, segment_ids, lm_label_ids = kr_batch
outputs = model(input_ids=input_ids,
attention_mask=input_mask,
token_type_ids=segment_ids,
masked_lm_labels=lm_label_ids,
negated=True)
loss = outputs[1] * args.ul_w
loss_dict = outputs[0]
nb_ul_tr_steps += 1
neg_loss += loss_dict['neg'].item()
if args.local_rank == 0 or args.local_rank == -1:
wandb.log({
'UL/train':
loss_dict['neg'].item(),
'KL/train':
loss_dict['kl'].item() * args.kl_w
})
ul_averagemeter.update(loss_dict['neg'].item())
kl_averagemeter.update(loss_dict['kl'].item() *
args.kl_w)
neg_nb_it += 1
elif not args.no_ll:
kr_step, kr_batch = next(pos_kr_gen)
kr_batch = tuple(t.to(device) for t in kr_batch)
input_ids, input_mask, segment_ids, lm_label_ids = kr_batch
outputs = model(input_ids=input_ids,
attention_mask=input_mask,
token_type_ids=segment_ids,
masked_lm_labels=lm_label_ids,
negated=False)
loss = outputs[1]
loss_dict = outputs[0]
nb_ll_tr_steps += 1
mlm_loss += loss_dict['mlm'].item()
mlm_nb_it += 1
if args.local_rank == 0 or args.local_rank == -1:
wandb.log({'LL/train': loss_dict['mlm'].item()})
ll_averagemeter.update(loss_dict['mlm'].item())
mlm_nb_ex += input_ids.size(0)
else:
continue
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
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)
tr_loss += loss.item()
if args.local_rank == 0 or args.local_rank == -1:
nb_tr_steps += 1
mean_loss = tr_loss * args.gradient_accumulation_steps / nb_tr_steps
pbar.set_postfix_str(
f"MLM: {mlm_averagemeter:.6f}, UL: {ul_averagemeter:.6f}, LL: {ll_averagemeter:.6f}, KL: {kl_averagemeter:.6f}"
)
if (step + 1) % args.gradient_accumulation_steps == 0:
scheduler.step() # Update learning rate schedule
optimizer.step()
optimizer.zero_grad()
global_step += 1
if n_gpu > 1 and args.local_rank == -1 or (
n_gpu <= 1 and args.local_rank == 0):
if False and (step + 1) % 100 == 0:
neg_valid_res = validate(
model=model,
dataloader=neg_valid_dataloader,
device=device,
negated=True)
pos_valid_res = validate(
model=model,
dataloader=pos_valid_dataloader,
device=device,
negated=False)
wandb.log({
'neg/valid/p@1': neg_valid_res % 100.,
'pos/valid/p@1': pos_valid_res % 100.
})
# Save a trained model
if n_gpu > 1 and args.local_rank == -1 or (n_gpu <= 1
and args.local_rank == 0):
print("Saving model")
logging.info("** ** * Saving fine-tuned model ** ** * ")
model.module.save_pretrained(args.output_dir)
tokenizer.save_pretrained(args.output_dir)
print(str(wandb.run.id))
pickle.dump(
str(wandb.run.id),
open(os.path.join(args.output_dir, 'wandb_run_id.pkl'), 'wb'))
def __init__(self,
vocab: Vocabulary,
pretrained_model: str = None,
requires_grad: bool = True,
transformer_weights_model: str = None,
reset_classifier: bool = False,
binary_loss: bool = False,
layer_freeze_regexes: List[str] = None,
on_load: bool = False,
regularizer: Optional[RegularizerApplicator] = None) -> None:
super().__init__(vocab, regularizer)
if on_load:
logging.info(f"Skipping loading of initial Transformer weights")
transformer_config = RobertaConfig.from_pretrained(
pretrained_model)
self._transformer_model = RobertaModel(transformer_config)
elif transformer_weights_model:
logging.info(
f"Loading Transformer weights model from {transformer_weights_model}"
)
transformer_model_loaded = load_archive(transformer_weights_model)
self._transformer_model = transformer_model_loaded.model._transformer_model
else:
self._transformer_model = RobertaModel.from_pretrained(
pretrained_model)
for name, param in self._transformer_model.named_parameters():
grad = requires_grad
if layer_freeze_regexes and grad:
grad = not any(
[bool(re.search(r, name)) for r in layer_freeze_regexes])
param.requires_grad = grad
transformer_config = self._transformer_model.config
self._output_dim = transformer_config.hidden_size
classifier_input_dim = self._output_dim
classifier_output_dim = 1
transformer_config.num_labels = classifier_output_dim
self._classifier = None
if not on_load and transformer_weights_model \
and hasattr(transformer_model_loaded.model, "_classifier") \
and not reset_classifier:
self._classifier = transformer_model_loaded.model._classifier
old_dims = (self._classifier.dense.in_features,
self._classifier.out_proj.out_features)
new_dims = (classifier_input_dim, classifier_output_dim)
if old_dims != new_dims:
logging.info(
f"NOT copying Transformer classifier weights, incompatible dims: {old_dims} vs {new_dims}"
)
self._classifier = None
if self._classifier is None:
self._classifier = RobertaClassificationHead(transformer_config)
self._binary_loss = binary_loss
self._accuracy = CategoricalAccuracy()
self._sigmoid = torch.nn.Sigmoid()
if self._binary_loss:
self._loss = torch.nn.BCEWithLogitsLoss()
else:
self._loss = torch.nn.CrossEntropyLoss()
self._debug = 2
self._padding_value = 1 # The index of the RoBERTa padding token
def init_encoder(cls, cfg_name: str, projection_dim: int = 0, dropout: float = 0.1, **kwargs) -> BertModel:
cfg = RobertaConfig.from_pretrained(cfg_name if cfg_name else 'roberta-base')
if dropout != 0:
cfg.attention_probs_dropout_prob = dropout
cfg.hidden_dropout_prob = dropout
return cls.from_pretrained(cfg_name, config=cfg, project_dim=projection_dim, **kwargs)