def predict(self,
data,
pred=None,
buckets=8,
batch_size=5000,
prob=False,
**kwargs):
args = self.args.update(locals())
init_logger(logger, verbose=args.verbose)
self.transform.eval()
if args.prob:
self.transform.append(Field('probs'))
logger.info("Load the data")
dataset = Dataset(self.transform, data)
dataset.build(args.batch_size, args.buckets, shuffle=False)
logger.info(f"\n{dataset}")
logger.info("Make predictions on the dataset")
start = datetime.now()
preds = self._predict(dataset.loader)
elapsed = datetime.now() - start
for name, value in preds.items():
setattr(dataset, name, value)
if pred is not None:
logger.info(f"Save predicted results to {pred}")
self.transform.save(pred, dataset.sentences)
logger.info(
f"{elapsed}s elapsed, {len(dataset) / elapsed.total_seconds():.2f} Sents/s"
)
return dataset
def train_abs_multi(args):
""" Spawns 1 process per GPU """
init_logger()
nb_gpu = args.world_size
mp = torch.multiprocessing.get_context('spawn')
# Create a thread to listen for errors in the child processes.
error_queue = mp.SimpleQueue()
error_handler = ErrorHandler(error_queue)
# Train with multiprocessing.
procs = []
for i in range(nb_gpu):
device_id = i
procs.append(
mp.Process(target=run,
args=(
args,
device_id,
error_queue,
),
daemon=True))
procs[i].start()
logger.info(" Starting process pid: %d " % procs[i].pid)
error_handler.add_child(procs[i].pid)
for p in procs:
p.join()
def test_text_abs(args, text_src, script=False):
logger.info('Loading checkpoint from %s' % args.test_from)
device = "cpu" if args.visible_gpus == '-1' else "cuda"
checkpoint = torch.load(args.test_from,
map_location=lambda storage, loc: storage)
opt = vars(checkpoint['opt'])
for k in opt.keys():
if (k in model_flags):
setattr(args, k, opt[k])
model = AbsSummarizer(args, device, checkpoint)
model.eval()
test_iter = data_loader.load_text(args, text_src, device, script=script)
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased',
do_lower_case=True,
cache_dir=args.temp_dir)
symbols = {
'BOS': tokenizer.vocab['[unused0]'],
'EOS': tokenizer.vocab['[unused1]'],
'PAD': tokenizer.vocab['[PAD]'],
'EOQ': tokenizer.vocab['[unused2]']
}
predictor = build_predictor(args, tokenizer, symbols, model, logger)
return predictor.translate(test_iter, -1)
def validate_abs(args, device_id):
timestep = 0
if (args.test_all):
cp_files = sorted(
glob.glob(os.path.join(args.model_path, 'model_step_*.pt')))
cp_files.sort(key=os.path.getmtime)
xent_lst = []
for i, cp in enumerate(cp_files):
step = int(cp.split('.')[-2].split('_')[-1])
if (args.test_start_from != -1 and step < args.test_start_from):
xent_lst.append((1e6, cp))
continue
xent = validate(args, device_id, cp, step)
xent_lst.append((xent, cp))
max_step = xent_lst.index(min(xent_lst))
if (i - max_step > 10):
break
xent_lst = sorted(xent_lst, key=lambda x: x[0])[:5]
logger.info('PPL %s' % str(xent_lst))
for xent, cp in xent_lst:
step = int(cp.split('.')[-2].split('_')[-1])
test_abs(args, device_id, cp, step)
else:
while (True):
cp_files = sorted(
glob.glob(os.path.join(args.model_path, 'model_step_*.pt')))
cp_files.sort(key=os.path.getmtime)
if (cp_files):
cp = cp_files[-1]
time_of_cp = os.path.getmtime(cp)
if (not os.path.getsize(cp) > 0):
time.sleep(60)
continue
if (time_of_cp > timestep):
timestep = time_of_cp
step = int(cp.split('.')[-2].split('_')[-1])
validate(args, device_id, cp, step)
test_abs(args, device_id, cp, step)
cp_files = sorted(
glob.glob(os.path.join(args.model_path, 'model_step_*.pt')))
cp_files.sort(key=os.path.getmtime)
if (cp_files):
cp = cp_files[-1]
time_of_cp = os.path.getmtime(cp)
if (time_of_cp > timestep):
continue
else:
time.sleep(300)
def output(self, step, num_steps, learning_rate, start):
"""Write out statistics to stdout.
Args:
step (int): current step
n_batch (int): total batches
start (int): start time of step.
"""
t = self.elapsed_time()
logger.info(
("Step %2d/%5d; acc: %6.2f; ppl: %5.2f; xent: %4.2f; " +
"lr: %7.8f; %3.0f/%3.0f tok/s; %6.0f sec") %
(step, num_steps, self.accuracy(), self.ppl(), self.xent(),
learning_rate, self.n_src_words / (t + 1e-5), self.n_words /
(t + 1e-5), time.time() - start))
sys.stdout.flush()
def validate(args, device_id, pt, step):
device = "cpu" if args.visible_gpus == '-1' else "cuda"
if (pt != ''):
test_from = pt
else:
test_from = args.test_from
logger.info('Loading checkpoint from %s' % test_from)
checkpoint = torch.load(test_from,
map_location=lambda storage, loc: storage)
opt = vars(checkpoint['opt'])
for k in opt.keys():
if (k in model_flags):
setattr(args, k, opt[k])
print(args)
model = AbsSummarizer(args, device, checkpoint)
model.eval()
valid_iter = data_loader.Dataloader(args,
load_dataset(args,
'valid',
shuffle=False),
args.batch_size,
device,
shuffle=False,
is_test=False)
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased',
do_lower_case=True,
cache_dir=args.temp_dir)
symbols = {
'BOS': tokenizer.vocab['[unused0]'],
'EOS': tokenizer.vocab['[unused1]'],
'PAD': tokenizer.vocab['[PAD]'],
'EOQ': tokenizer.vocab['[unused2]']
}
valid_loss = abs_loss(model.generator,
symbols,
model.vocab_size,
train=False,
device=device)
trainer = build_trainer(args, device_id, model, None, valid_loss)
stats = trainer.validate(valid_iter, step)
return stats.xent()
def build_trainer(args, device_id, model, optims, loss):
"""
Simplify `Trainer` creation based on user `opt`s*
Args:
opt (:obj:`Namespace`): user options (usually from argument parsing)
model (:obj:`onmt.models.NMTModel`): the model to train
fields (dict): dict of fields
optim (:obj:`onmt.utils.Optimizer`): optimizer used during training
data_type (str): string describing the type of data
e.g. "text", "img", "audio"
model_saver(:obj:`onmt.models.ModelSaverBase`): the utility object
used to save the model
"""
device = "cpu" if args.visible_gpus == '-1' else "cuda"
grad_accum_count = args.accum_count
n_gpu = args.world_size
if device_id >= 0:
gpu_rank = int(args.gpu_ranks[device_id])
else:
gpu_rank = 0
n_gpu = 0
print('gpu_rank %d' % gpu_rank)
tensorboard_log_dir = args.model_path
writer = SummaryWriter(tensorboard_log_dir, comment="Unmt")
report_manager = ReportMgr(args.report_every,
start_time=-1,
tensorboard_writer=writer)
trainer = Trainer(args, model, optims, loss, grad_accum_count, n_gpu,
gpu_rank, report_manager)
# print(tr)
if (model):
n_params = _tally_parameters(model)
logger.info('* number of parameters: %d' % n_params)
return trainer
def evaluate(self, data, buckets=8, batch_size=5000, **kwargs):
args = self.args.update(locals())
init_logger(logger, verbose=args.verbose)
self.transform.train()
logger.info("Load the data")
dataset = Dataset(self.transform, data)
dataset.build(args.batch_size, args.buckets)
logger.info(f"\n{dataset}")
logger.info("Evaluate the dataset")
start = datetime.now()
loss, metric = self._evaluate(dataset.loader)
elapsed = datetime.now() - start
logger.info(f"loss: {loss:.4f} - {metric}")
logger.info(
f"{elapsed}s elapsed, {len(dataset)/elapsed.total_seconds():.2f} Sents/s"
)
return loss, metric
def _save(self, step):
real_model = self.model
# real_generator = (self.generator.module
# if isinstance(self.generator, torch.nn.DataParallel)
# else self.generator)
model_state_dict = real_model.state_dict()
# generator_state_dict = real_generator.state_dict()
checkpoint = {
'model': model_state_dict,
# 'generator': generator_state_dict,
'opt': self.args,
'optims': self.optims,
}
checkpoint_path = os.path.join(self.args.model_path,
'model_step_%d.pt' % step)
logger.info("Saving checkpoint %s" % checkpoint_path)
# checkpoint_path = '%s_step_%d.pt' % (FLAGS.model_path, step)
if (not os.path.exists(checkpoint_path)):
torch.save(checkpoint, checkpoint_path)
return checkpoint, checkpoint_path
def test_abs(args, device_id, pt, step):
device = "cpu" if args.visible_gpus == '-1' else "cuda"
if (pt != ''):
test_from = pt
else:
test_from = args.test_from
logger.info('Loading checkpoint from %s' % test_from)
checkpoint = torch.load(test_from,
map_location=lambda storage, loc: storage)
print(checkpoint)
opt = vars(checkpoint['opt'])
for k in opt.keys():
if (k in model_flags):
setattr(args, k, opt[k])
print(args)
model = AbsSummarizer(args, device, checkpoint)
model.eval()
test_iter = data_loader.Dataloader(args,
load_dataset(args,
'test',
shuffle=False),
args.test_batch_size,
device,
shuffle=False,
is_test=True)
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased',
do_lower_case=True,
cache_dir=args.temp_dir)
symbols = {
'BOS': tokenizer.vocab['[unused0]'],
'EOS': tokenizer.vocab['[unused1]'],
'PAD': tokenizer.vocab['[PAD]'],
'EOQ': tokenizer.vocab['[unused2]']
}
predictor = build_predictor(args, tokenizer, symbols, model, logger)
predictor.translate(test_iter, step)
def log(self, *args, **kwargs):
logger.info(*args, **kwargs)
def _lazy_dataset_loader(pt_file, corpus_type):
dataset = torch.load(pt_file)
logger.info('Loading %s dataset from %s, number of examples: %d' %
(corpus_type, pt_file, len(dataset)))
return dataset
def train(self,
train,
dev,
test,
buckets=32,
batch_size=5000,
lr=8e-4,
mu=.9,
nu=.9,
epsilon=1e-12,
clip=5.0,
decay=.75,
decay_steps=5000,
step_decay_factor=0.5,
step_decay_patience=15,
epochs=5000,
patience=100,
verbose=True,
**kwargs):
args = self.args.update(locals())
init_logger(logger, verbose=args.verbose)
self.transform.train()
if dist.is_initialized():
args.batch_size = args.batch_size // dist.get_world_size()
logger.info("Load the data")
train = Dataset(self.transform, args.train, **args)
dev = Dataset(self.transform, args.dev)
test = Dataset(self.transform, args.test)
train.build(args.batch_size, args.buckets, True, dist.is_initialized())
dev.build(args.batch_size, args.buckets)
test.build(args.batch_size, args.buckets)
logger.info(
f"\n{'train:':6} {train}\n{'dev:':6} {dev}\n{'test:':6} {test}\n")
logger.info(f"{self.model}\n")
if dist.is_initialized():
self.model = DDP(self.model,
device_ids=[dist.get_rank()],
find_unused_parameters=True)
self.optimizer = Adam(self.model.parameters(), args.lr,
(args.mu, args.nu), args.epsilon)
if self.args.learning_rate_schedule == 'Exponential':
self.scheduler = ExponentialLR(self.optimizer,
args.decay**(1 / args.decay_steps))
elif self.args.learning_rate_schedule == 'Plateau':
self.scheduler = ReduceLROnPlateau(
self.optimizer,
'max',
factor=args.step_decay_factor,
patience=args.step_decay_patience,
verbose=True)
elapsed = timedelta()
best_e, best_metric = 1, Metric()
best_metric_test = Metric()
for epoch in range(1, args.epochs + 1):
start = datetime.now()
logger.info(f"Epoch {epoch} / {args.epochs}:")
loss = self._train(train.loader)
logger.info(f"{'train:':6} - loss: {loss:.4f}")
loss, dev_metric = self._evaluate(dev.loader)
logger.info(f"{'dev:':6} - loss: {loss:.4f} - {dev_metric}")
loss, test_metric = self._evaluate(test.loader)
logger.info(f"{'test:':6} - loss: {loss:.4f} - {test_metric}")
t = datetime.now() - start
# save the model if it is the best so far
if dev_metric > best_metric:
best_e, best_metric = epoch, dev_metric
dev_metric_name = '_dev_LP_{:.2f}_LR_{:.2f}_LF_{:.2f}.pt'.format(
100 * best_metric.lp, 100 * best_metric.lr,
100 * best_metric.lf)
if is_master():
self.save(args.path + dev_metric_name)
logger.info(f"{t}s elapsed (saved)\n")
keep_last_n_checkpoint(args.path + '_dev_', n=5)
else:
logger.info(f"{t}s elapsed\n")
elapsed += t
if self.args.learning_rate_schedule == 'Plateau':
self.scheduler.step(best_metric.score)
# if epoch - best_e >= args.patience:
# break
loss, metric = self.load(args.path)._evaluate(test.loader)
logger.info(f"Epoch {best_e} saved")
logger.info(f"{'dev:':6} - {best_metric}")
logger.info(f"{'test:':6} - {metric}")
logger.info(f"{elapsed}s elapsed, {elapsed / epoch}s/epoch")
def train_abs_single(args, device_id):
init_logger(args.log_file)
logger.info(str(args))
device = "cpu" if args.visible_gpus == '-1' else "cuda"
logger.info('Device ID %d' % device_id)
logger.info('Device %s' % device)
torch.manual_seed(args.seed)
random.seed(args.seed)
torch.backends.cudnn.deterministic = True
if device_id >= 0:
torch.cuda.set_device(device_id)
torch.cuda.manual_seed(args.seed)
if args.train_from != '':
logger.info('Loading checkpoint from %s' % args.train_from)
checkpoint = torch.load(args.train_from,
map_location=lambda storage, loc: storage)
opt = vars(checkpoint['opt'])
for k in opt.keys():
if (k in model_flags):
setattr(args, k, opt[k])
else:
checkpoint = None
if (args.load_from_extractive != ''):
logger.info('Loading bert from extractive model %s' %
args.load_from_extractive)
bert_from_extractive = torch.load(
args.load_from_extractive,
map_location=lambda storage, loc: storage)
bert_from_extractive = bert_from_extractive['model']
else:
bert_from_extractive = None
torch.manual_seed(args.seed)
random.seed(args.seed)
torch.backends.cudnn.deterministic = True
def train_iter_fct():
return data_loader.Dataloader(args,
load_dataset(args, 'train',
shuffle=True),
args.batch_size,
device,
shuffle=True,
is_test=False)
model = AbsSummarizer(args, device, checkpoint, bert_from_extractive)
if (args.sep_optim):
optim_bert = model_builder.build_optim_bert(args, model, checkpoint)
optim_dec = model_builder.build_optim_dec(args, model, checkpoint)
optim = [optim_bert, optim_dec]
else:
optim = [model_builder.build_optim(args, model, checkpoint)]
logger.info(model)
tokenizer = BertTokenizer.from_pretrained('bert-base-uncased',
do_lower_case=True,
cache_dir=args.temp_dir)
symbols = {
'BOS': tokenizer.vocab['[unused0]'],
'EOS': tokenizer.vocab['[unused1]'],
'PAD': tokenizer.vocab['[PAD]'],
'EOQ': tokenizer.vocab['[unused2]']
}
train_loss = abs_loss(model.generator,
symbols,
model.vocab_size,
device,
train=True,
label_smoothing=args.label_smoothing)
trainer = build_trainer(args, device_id, model, optim, train_loss)
trainer.train(train_iter_fct, args.train_steps)
def test(self, test_iter, step, cal_lead=False, cal_oracle=False):
""" Validate model.
valid_iter: validate data iterator
Returns:
:obj:`nmt.Statistics`: validation loss statistics
"""
# Set model in validating mode.
def _get_ngrams(n, text):
ngram_set = set()
text_length = len(text)
max_index_ngram_start = text_length - n
for i in range(max_index_ngram_start + 1):
ngram_set.add(tuple(text[i:i + n]))
return ngram_set
def _block_tri(c, p):
tri_c = _get_ngrams(3, c.split())
for s in p:
tri_s = _get_ngrams(3, s.split())
if len(tri_c.intersection(tri_s)) > 0:
return True
return False
if (not cal_lead and not cal_oracle):
self.model.eval()
stats = Statistics()
can_path = '%s_step%d.candidate' % (self.args.result_path, step)
gold_path = '%s_step%d.gold' % (self.args.result_path, step)
with open(can_path, 'w') as save_pred:
with open(gold_path, 'w') as save_gold:
with torch.no_grad():
for batch in test_iter:
gold = []
pred = []
if (cal_lead):
selected_ids = [list(range(batch.clss.size(1)))
] * batch.batch_size
for i, idx in enumerate(selected_ids):
_pred = []
if (len(batch.src_str[i]) == 0):
continue
for j in selected_ids[i][:len(batch.src_str[i])]:
if (j >= len(batch.src_str[i])):
continue
candidate = batch.src_str[i][j].strip()
_pred.append(candidate)
if ((not cal_oracle)
and (not self.args.recall_eval)
and len(_pred) == 3):
break
_pred = '<q>'.join(_pred)
if (self.args.recall_eval):
_pred = ' '.join(
_pred.split()
[:len(batch.tgt_str[i].split())])
pred.append(_pred)
gold.append(batch.tgt_str[i])
for i in range(len(gold)):
save_gold.write(gold[i].strip() + '\n')
for i in range(len(pred)):
save_pred.write(pred[i].strip() + '\n')
if (step != -1 and self.args.report_rouge):
rouges = test_rouge(self.args.temp_dir, can_path, gold_path)
logger.info('Rouges at step %d \n%s' %
(step, rouge_results_to_str(rouges)))
self._report_step(0, step, valid_stats=stats)
return stats
def train(self,
train_iter_fct,
train_steps,
valid_iter_fct=None,
valid_steps=-1):
"""
The main training loops.
by iterating over training data (i.e. `train_iter_fct`)
and running validation (i.e. iterating over `valid_iter_fct`
Args:
train_iter_fct(function): a function that returns the train
iterator. e.g. something like
train_iter_fct = lambda: generator(*args, **kwargs)
valid_iter_fct(function): same as train_iter_fct, for valid data
train_steps(int):
valid_steps(int):
save_checkpoint_steps(int):
Return:
None
"""
logger.info('Start training...')
# step = self.optim._step + 1
step = self.optims[0]._step + 1
true_batchs = []
accum = 0
normalization = 0
train_iter = train_iter_fct()
total_stats = Statistics()
report_stats = Statistics()
self._start_report_manager(start_time=total_stats.start_time)
while step <= train_steps:
reduce_counter = 0
for i, batch in enumerate(train_iter):
if self.n_gpu == 0 or (i % self.n_gpu == self.gpu_rank):
true_batchs.append(batch)
num_tokens = batch.tgt[:,
1:].ne(self.loss.padding_idx).sum()
normalization += num_tokens.item()
accum += 1
if accum == self.grad_accum_count:
reduce_counter += 1
if self.n_gpu > 1:
normalization = sum(
distributed.all_gather_list(normalization))
self._gradient_accumulation(true_batchs, normalization,
total_stats, report_stats)
report_stats = self._maybe_report_training(
step, train_steps, self.optims[0].learning_rate,
report_stats)
true_batchs = []
accum = 0
normalization = 0
if (step % self.save_checkpoint_steps == 0
and self.gpu_rank == 0):
self._save(step)
step += 1
if step > train_steps:
break
train_iter = train_iter_fct()
return total_stats
