def main(args):
torch.manual_seed(args.seed)
torch.cuda.manual_seed_all(args.seed)
args_init = copy.deepcopy(args)
args_teacher = copy.deepcopy(args)
# Load a conf file
if args.resume:
conf = load_config(
os.path.join(os.path.dirname(args.resume), 'conf.yml'))
for k, v in conf.items():
if k not in ['resume', 'local_rank']:
setattr(args, k, v)
args = compute_subsampling_factor(args)
resume_epoch = int(args.resume.split('-')[-1]) if args.resume else 0
# Load dataset
train_set = build_dataloader(args=args,
tsv_path=args.train_set,
tsv_path_sub1=args.train_set_sub1,
tsv_path_sub2=args.train_set_sub2,
batch_size=args.batch_size,
batch_size_type=args.batch_size_type,
max_n_frames=args.max_n_frames,
resume_epoch=resume_epoch,
sort_by=args.sort_by,
short2long=args.sort_short2long,
sort_stop_epoch=args.sort_stop_epoch,
num_workers=args.workers,
pin_memory=args.pin_memory,
distributed=args.distributed,
word_alignment_dir=args.train_word_alignment,
ctc_alignment_dir=args.train_ctc_alignment)
dev_set = build_dataloader(
args=args,
tsv_path=args.dev_set,
tsv_path_sub1=args.dev_set_sub1,
tsv_path_sub2=args.dev_set_sub2,
batch_size=1 if 'transducer' in args.dec_type else args.batch_size,
batch_size_type='seq'
if 'transducer' in args.dec_type else args.batch_size_type,
max_n_frames=1600,
word_alignment_dir=args.dev_word_alignment,
ctc_alignment_dir=args.dev_ctc_alignment)
eval_sets = [
build_dataloader(args=args, tsv_path=s, batch_size=1, is_test=True)
for s in args.eval_sets
]
args.vocab = train_set.vocab
args.vocab_sub1 = train_set.vocab_sub1
args.vocab_sub2 = train_set.vocab_sub2
args.input_dim = train_set.input_dim
# Set save path
if args.resume:
args.save_path = os.path.dirname(args.resume)
dir_name = os.path.basename(args.save_path)
else:
dir_name = set_asr_model_name(args)
if args.mbr_training:
assert args.asr_init
args.save_path = mkdir_join(os.path.dirname(args.asr_init),
dir_name)
else:
args.save_path = mkdir_join(
args.model_save_dir,
'_'.join(os.path.basename(args.train_set).split('.')[:-1]),
dir_name)
if args.local_rank > 0:
time.sleep(1)
args.save_path = set_save_path(args.save_path) # avoid overwriting
# Set logger
set_logger(os.path.join(args.save_path, 'train.log'), args.stdout,
args.local_rank)
# Load a LM conf file for LM fusion & LM initialization
if not args.resume and args.external_lm:
lm_conf = load_config(
os.path.join(os.path.dirname(args.external_lm), 'conf.yml'))
args.lm_conf = argparse.Namespace()
for k, v in lm_conf.items():
setattr(args.lm_conf, k, v)
assert args.unit == args.lm_conf.unit
assert args.vocab == args.lm_conf.vocab
# Model setting
model = Speech2Text(args, args.save_path, train_set.idx2token[0])
if not args.resume:
# Save nlsyms, dictionary, and wp_model
if args.nlsyms:
shutil.copy(args.nlsyms, os.path.join(args.save_path,
'nlsyms.txt'))
for sub in ['', '_sub1', '_sub2']:
if args.get('dict' + sub):
shutil.copy(
args.get('dict' + sub),
os.path.join(args.save_path, 'dict' + sub + '.txt'))
if args.get('unit' + sub) == 'wp':
shutil.copy(
args.get('wp_model' + sub),
os.path.join(args.save_path, 'wp' + sub + '.model'))
for k, v in sorted(args.items(), key=lambda x: x[0]):
logger.info('%s: %s' % (k, str(v)))
# Count total parameters
for n in sorted(list(model.num_params_dict.keys())):
n_params = model.num_params_dict[n]
logger.info("%s %d" % (n, n_params))
logger.info("Total %.2f M parameters" %
(model.total_parameters / 1000000))
logger.info('torch version: %s' % str(torch.__version__))
logger.info(model)
# Initialize with pre-trained model's parameters
if args.asr_init:
# Load ASR model (full model)
conf_init = load_config(
os.path.join(os.path.dirname(args.asr_init), 'conf.yml'))
for k, v in conf_init.items():
setattr(args_init, k, v)
model_init = Speech2Text(args_init)
load_checkpoint(args.asr_init, model_init)
# Overwrite parameters
param_dict = dict(model_init.named_parameters())
for n, p in model.named_parameters():
if n in param_dict.keys() and p.size() == param_dict[n].size():
if args.asr_init_enc_only and 'enc' not in n:
continue
p.data = param_dict[n].data
logger.info('Overwrite %s' % n)
# Set optimizer
optimizer = set_optimizer(
model,
'sgd' if resume_epoch > args.convert_to_sgd_epoch else args.optimizer,
args.lr, args.weight_decay)
# Wrap optimizer by learning rate scheduler
is_transformer = 'former' in args.enc_type or 'former' in args.dec_type or 'former' in args.dec_type_sub1
scheduler = LRScheduler(
optimizer,
args.lr,
decay_type=args.lr_decay_type,
decay_start_epoch=args.lr_decay_start_epoch,
decay_rate=args.lr_decay_rate,
decay_patient_n_epochs=args.lr_decay_patient_n_epochs,
early_stop_patient_n_epochs=args.early_stop_patient_n_epochs,
lower_better=args.metric not in ['accuracy', 'bleu'],
warmup_start_lr=args.warmup_start_lr,
warmup_n_steps=args.warmup_n_steps,
peak_lr=0.05 / (args.get('transformer_enc_d_model', 0)**0.5)
if 'conformer' in args.enc_type else 1e6,
model_size=args.get('transformer_enc_d_model',
args.get('transformer_dec_d_model', 0)),
factor=args.lr_factor,
noam=args.optimizer == 'noam',
save_checkpoints_topk=10 if is_transformer else 1)
if args.resume:
# Restore the last saved model
load_checkpoint(args.resume, model, scheduler)
# Resume between convert_to_sgd_epoch -1 and convert_to_sgd_epoch
if resume_epoch == args.convert_to_sgd_epoch:
scheduler.convert_to_sgd(model,
args.lr,
args.weight_decay,
decay_type='always',
decay_rate=0.5)
# Load teacher ASR model
teacher = None
if args.teacher:
assert os.path.isfile(args.teacher), 'There is no checkpoint.'
conf_teacher = load_config(
os.path.join(os.path.dirname(args.teacher), 'conf.yml'))
for k, v in conf_teacher.items():
setattr(args_teacher, k, v)
# Setting for knowledge distillation
args_teacher.ss_prob = 0
args.lsm_prob = 0
teacher = Speech2Text(args_teacher)
load_checkpoint(args.teacher, teacher)
# Load teacher LM
teacher_lm = None
if args.teacher_lm:
assert os.path.isfile(args.teacher_lm), 'There is no checkpoint.'
conf_lm = load_config(
os.path.join(os.path.dirname(args.teacher_lm), 'conf.yml'))
args_lm = argparse.Namespace()
for k, v in conf_lm.items():
setattr(args_lm, k, v)
teacher_lm = build_lm(args_lm)
load_checkpoint(args.teacher_lm, teacher_lm)
# GPU setting
args.use_apex = args.train_dtype in ["O0", "O1", "O2", "O3"]
amp, scaler = None, None
if args.n_gpus >= 1:
model.cudnn_setting(
deterministic=((not is_transformer) and (not args.cudnn_benchmark))
or args.cudnn_deterministic,
benchmark=(not is_transformer) and args.cudnn_benchmark)
# Mixed precision training setting
if args.use_apex:
if LooseVersion(torch.__version__) >= LooseVersion("1.6.0"):
scaler = torch.cuda.amp.GradScaler()
else:
from apex import amp
model, scheduler.optimizer = amp.initialize(
model, scheduler.optimizer, opt_level=args.train_dtype)
from neural_sp.models.seq2seq.decoders.ctc import CTC
amp.register_float_function(CTC, "loss_fn")
# NOTE: see https://github.com/espnet/espnet/pull/1779
amp.init()
if args.resume:
load_checkpoint(args.resume, amp=amp)
n = torch.cuda.device_count() // args.local_world_size
device_ids = list(range(args.local_rank * n,
(args.local_rank + 1) * n))
torch.cuda.set_device(device_ids[0])
model.cuda(device_ids[0])
scheduler.cuda(device_ids[0])
if args.distributed:
model = DDP(model, device_ids=device_ids)
else:
model = CustomDataParallel(model,
device_ids=list(range(args.n_gpus)))
if teacher is not None:
teacher.cuda()
if teacher_lm is not None:
teacher_lm.cuda()
else:
model = CPUWrapperASR(model)
# Set process name
logger.info('PID: %s' % os.getpid())
logger.info('USERNAME: %s' % os.uname()[1])
logger.info('#GPU: %d' % torch.cuda.device_count())
setproctitle(args.job_name if args.job_name else dir_name)
# Set reporter
reporter = Reporter(args, model, args.local_rank)
args.wandb_id = reporter.wandb_id
if args.resume:
n_steps = scheduler.n_steps * max(
1, args.accum_grad_n_steps // args.local_world_size)
reporter.resume(n_steps, resume_epoch)
# Save conf file as a yaml file
if args.local_rank == 0:
save_config(args, os.path.join(args.save_path, 'conf.yml'))
if args.external_lm:
save_config(args.lm_conf,
os.path.join(args.save_path, 'conf_lm.yml'))
# NOTE: save after reporter for wandb ID
# Define tasks
if args.mtl_per_batch:
# NOTE: from easier to harder tasks
tasks = []
if args.total_weight - args.bwd_weight - args.ctc_weight - args.sub1_weight - args.sub2_weight > 0:
tasks += ['ys']
if args.bwd_weight > 0:
tasks = ['ys.bwd'] + tasks
if args.ctc_weight > 0:
tasks = ['ys.ctc'] + tasks
if args.mbr_ce_weight > 0:
tasks = ['ys.mbr'] + tasks
for sub in ['sub1', 'sub2']:
if args.get('train_set_' + sub) is not None:
if args.get(sub + '_weight', 0) - args.get(
'ctc_weight_' + sub, 0) > 0:
tasks = ['ys_' + sub] + tasks
if args.get('ctc_weight_' + sub, 0) > 0:
tasks = ['ys_' + sub + '.ctc'] + tasks
else:
tasks = ['all']
if args.get('ss_start_epoch', 0) <= resume_epoch:
model.module.trigger_scheduled_sampling()
if args.get('mocha_quantity_loss_start_epoch', 0) <= resume_epoch:
model.module.trigger_quantity_loss()
start_time_train = time.time()
for ep in range(resume_epoch, args.n_epochs):
train_one_epoch(model, train_set, dev_set, eval_sets, scheduler,
reporter, logger, args, amp, scaler, tasks, teacher,
teacher_lm)
# Save checkpoint and validate model per epoch
if reporter.n_epochs + 1 < args.eval_start_epoch:
scheduler.epoch() # lr decay
reporter.epoch() # plot
# Save model
if args.local_rank == 0:
scheduler.save_checkpoint(model,
args.save_path,
amp=amp,
remove_old=(not is_transformer)
and args.remove_old_checkpoints)
else:
start_time_eval = time.time()
# dev
metric_dev = validate([model.module], dev_set, args,
reporter.n_epochs + 1, logger)
scheduler.epoch(metric_dev) # lr decay
reporter.epoch(metric_dev, name=args.metric) # plot
reporter.add_scalar('dev/' + args.metric, metric_dev)
if scheduler.is_topk or is_transformer:
# Save model
if args.local_rank == 0:
scheduler.save_checkpoint(model,
args.save_path,
amp=amp,
remove_old=(not is_transformer)
and args.remove_old_checkpoints)
# test
if scheduler.is_topk:
for eval_set in eval_sets:
validate([model.module], eval_set, args,
reporter.n_epochs, logger)
logger.info('Evaluation time: %.2f min' %
((time.time() - start_time_eval) / 60))
# Early stopping
if scheduler.is_early_stop:
break
# Convert to fine-tuning stage
if reporter.n_epochs == args.convert_to_sgd_epoch:
scheduler.convert_to_sgd(model,
args.lr,
args.weight_decay,
decay_type='always',
decay_rate=0.5)
if reporter.n_epochs >= args.n_epochs:
break
if args.get('ss_start_epoch', 0) == (ep + 1):
model.module.trigger_scheduled_sampling()
if args.get('mocha_quantity_loss_start_epoch', 0) == (ep + 1):
model.module.trigger_quantity_loss()
logger.info('Total time: %.2f hour' %
((time.time() - start_time_train) / 3600))
reporter.close()
return args.save_path
def main():
args = parse_args_train(sys.argv[1:])
args_init = copy.deepcopy(args)
args_teacher = copy.deepcopy(args)
# Load a conf file
if args.resume:
conf = load_config(os.path.join(os.path.dirname(args.resume), 'conf.yml'))
for k, v in conf.items():
if k != 'resume':
setattr(args, k, v)
recog_params = vars(args)
args = compute_susampling_factor(args)
# Load dataset
batch_size = args.batch_size * args.n_gpus if args.n_gpus >= 1 else args.batch_size
train_set = Dataset(corpus=args.corpus,
tsv_path=args.train_set,
tsv_path_sub1=args.train_set_sub1,
tsv_path_sub2=args.train_set_sub2,
dict_path=args.dict,
dict_path_sub1=args.dict_sub1,
dict_path_sub2=args.dict_sub2,
nlsyms=args.nlsyms,
unit=args.unit,
unit_sub1=args.unit_sub1,
unit_sub2=args.unit_sub2,
wp_model=args.wp_model,
wp_model_sub1=args.wp_model_sub1,
wp_model_sub2=args.wp_model_sub2,
batch_size=batch_size,
n_epochs=args.n_epochs,
min_n_frames=args.min_n_frames,
max_n_frames=args.max_n_frames,
shuffle_bucket=args.shuffle_bucket,
sort_by='input',
short2long=args.sort_short2long,
sort_stop_epoch=args.sort_stop_epoch,
dynamic_batching=args.dynamic_batching,
ctc=args.ctc_weight > 0,
ctc_sub1=args.ctc_weight_sub1 > 0,
ctc_sub2=args.ctc_weight_sub2 > 0,
subsample_factor=args.subsample_factor,
subsample_factor_sub1=args.subsample_factor_sub1,
subsample_factor_sub2=args.subsample_factor_sub2,
discourse_aware=args.discourse_aware)
dev_set = Dataset(corpus=args.corpus,
tsv_path=args.dev_set,
tsv_path_sub1=args.dev_set_sub1,
tsv_path_sub2=args.dev_set_sub2,
dict_path=args.dict,
dict_path_sub1=args.dict_sub1,
dict_path_sub2=args.dict_sub2,
nlsyms=args.nlsyms,
unit=args.unit,
unit_sub1=args.unit_sub1,
unit_sub2=args.unit_sub2,
wp_model=args.wp_model,
wp_model_sub1=args.wp_model_sub1,
wp_model_sub2=args.wp_model_sub2,
batch_size=batch_size,
min_n_frames=args.min_n_frames,
max_n_frames=args.max_n_frames,
ctc=args.ctc_weight > 0,
ctc_sub1=args.ctc_weight_sub1 > 0,
ctc_sub2=args.ctc_weight_sub2 > 0,
subsample_factor=args.subsample_factor,
subsample_factor_sub1=args.subsample_factor_sub1,
subsample_factor_sub2=args.subsample_factor_sub2)
eval_sets = [Dataset(corpus=args.corpus,
tsv_path=s,
dict_path=args.dict,
nlsyms=args.nlsyms,
unit=args.unit,
wp_model=args.wp_model,
batch_size=1,
is_test=True) for s in args.eval_sets]
args.vocab = train_set.vocab
args.vocab_sub1 = train_set.vocab_sub1
args.vocab_sub2 = train_set.vocab_sub2
args.input_dim = train_set.input_dim
# Set save path
if args.resume:
save_path = os.path.dirname(args.resume)
dir_name = os.path.basename(save_path)
else:
dir_name = set_asr_model_name(args)
if args.mbr_training:
assert args.asr_init
save_path = mkdir_join(os.path.dirname(args.asr_init), dir_name)
else:
save_path = mkdir_join(args.model_save_dir, '_'.join(
os.path.basename(args.train_set).split('.')[:-1]), dir_name)
save_path = set_save_path(save_path) # avoid overwriting
# Set logger
set_logger(os.path.join(save_path, 'train.log'), stdout=args.stdout)
# Load a LM conf file for LM fusion & LM initialization
if not args.resume and args.external_lm:
lm_conf = load_config(os.path.join(os.path.dirname(args.external_lm), 'conf.yml'))
args.lm_conf = argparse.Namespace()
for k, v in lm_conf.items():
setattr(args.lm_conf, k, v)
assert args.unit == args.lm_conf.unit
assert args.vocab == args.lm_conf.vocab
# Model setting
model = Speech2Text(args, save_path, train_set.idx2token[0])
if not args.resume:
# Save the conf file as a yaml file
save_config(vars(args), os.path.join(save_path, 'conf.yml'))
if args.external_lm:
save_config(args.lm_conf, os.path.join(save_path, 'conf_lm.yml'))
# Save the nlsyms, dictionary, and wp_model
if args.nlsyms:
shutil.copy(args.nlsyms, os.path.join(save_path, 'nlsyms.txt'))
for sub in ['', '_sub1', '_sub2']:
if getattr(args, 'dict' + sub):
shutil.copy(getattr(args, 'dict' + sub), os.path.join(save_path, 'dict' + sub + '.txt'))
if getattr(args, 'unit' + sub) == 'wp':
shutil.copy(getattr(args, 'wp_model' + sub), os.path.join(save_path, 'wp' + sub + '.model'))
for k, v in sorted(vars(args).items(), key=lambda x: x[0]):
logger.info('%s: %s' % (k, str(v)))
# Count total parameters
for n in sorted(list(model.num_params_dict.keys())):
n_params = model.num_params_dict[n]
logger.info("%s %d" % (n, n_params))
logger.info("Total %.2f M parameters" % (model.total_parameters / 1000000))
logger.info(model)
# Initialize with pre-trained model's parameters
if args.asr_init:
# Load the ASR model (full model)
conf_init = load_config(os.path.join(os.path.dirname(args.asr_init), 'conf.yml'))
for k, v in conf_init.items():
setattr(args_init, k, v)
model_init = Speech2Text(args_init)
load_checkpoint(args.asr_init, model_init)
# Overwrite parameters
param_dict = dict(model_init.named_parameters())
for n, p in model.named_parameters():
if n in param_dict.keys() and p.size() == param_dict[n].size():
if args.asr_init_enc_only and 'enc' not in n:
continue
p.data = param_dict[n].data
logger.info('Overwrite %s' % n)
# Set optimizer
resume_epoch = 0
if args.resume:
resume_epoch = int(args.resume.split('-')[-1])
optimizer = set_optimizer(model, 'sgd' if resume_epoch > args.convert_to_sgd_epoch else args.optimizer,
args.lr, args.weight_decay)
else:
optimizer = set_optimizer(model, args.optimizer, args.lr, args.weight_decay)
# Wrap optimizer by learning rate scheduler
is_transformer = 'former' in args.enc_type or 'former' in args.dec_type
optimizer = LRScheduler(optimizer, args.lr,
decay_type=args.lr_decay_type,
decay_start_epoch=args.lr_decay_start_epoch,
decay_rate=args.lr_decay_rate,
decay_patient_n_epochs=args.lr_decay_patient_n_epochs,
early_stop_patient_n_epochs=args.early_stop_patient_n_epochs,
lower_better=args.metric not in ['accuracy', 'bleu'],
warmup_start_lr=args.warmup_start_lr,
warmup_n_steps=args.warmup_n_steps,
model_size=getattr(args, 'transformer_d_model', 0),
factor=args.lr_factor,
noam=args.optimizer == 'noam',
save_checkpoints_topk=10 if is_transformer else 1)
if args.resume:
# Restore the last saved model
load_checkpoint(args.resume, model, optimizer)
# Resume between convert_to_sgd_epoch -1 and convert_to_sgd_epoch
if resume_epoch == args.convert_to_sgd_epoch:
optimizer.convert_to_sgd(model, args.lr, args.weight_decay,
decay_type='always', decay_rate=0.5)
# Load the teacher ASR model
teacher = None
if args.teacher:
assert os.path.isfile(args.teacher), 'There is no checkpoint.'
conf_teacher = load_config(os.path.join(os.path.dirname(args.teacher), 'conf.yml'))
for k, v in conf_teacher.items():
setattr(args_teacher, k, v)
# Setting for knowledge distillation
args_teacher.ss_prob = 0
args.lsm_prob = 0
teacher = Speech2Text(args_teacher)
load_checkpoint(args.teacher, teacher)
# Load the teacher LM
teacher_lm = None
if args.teacher_lm:
assert os.path.isfile(args.teacher_lm), 'There is no checkpoint.'
conf_lm = load_config(os.path.join(os.path.dirname(args.teacher_lm), 'conf.yml'))
args_lm = argparse.Namespace()
for k, v in conf_lm.items():
setattr(args_lm, k, v)
teacher_lm = build_lm(args_lm)
load_checkpoint(args.teacher_lm, teacher_lm)
# GPU setting
use_apex = args.train_dtype in ["O0", "O1", "O2", "O3"]
amp = None
if args.n_gpus >= 1:
model.cudnn_setting(deterministic=not (is_transformer or args.cudnn_benchmark),
benchmark=not is_transformer and args.cudnn_benchmark)
model.cuda()
# Mix precision training setting
if use_apex:
from apex import amp
model, optimizer.optimizer = amp.initialize(model, optimizer.optimizer,
opt_level=args.train_dtype)
from neural_sp.models.seq2seq.decoders.ctc import CTC
amp.register_float_function(CTC, "loss_fn")
# NOTE: see https://github.com/espnet/espnet/pull/1779
amp.init()
if args.resume:
load_checkpoint(args.resume, amp=amp)
model = CustomDataParallel(model, device_ids=list(range(0, args.n_gpus)))
if teacher is not None:
teacher.cuda()
if teacher_lm is not None:
teacher_lm.cuda()
else:
model = CPUWrapperASR(model)
# Set process name
logger.info('PID: %s' % os.getpid())
logger.info('USERNAME: %s' % os.uname()[1])
logger.info('#GPU: %d' % torch.cuda.device_count())
setproctitle(args.job_name if args.job_name else dir_name)
# Set reporter
reporter = Reporter(save_path)
if args.mtl_per_batch:
# NOTE: from easier to harder tasks
tasks = []
if 1 - args.bwd_weight - args.ctc_weight - args.sub1_weight - args.sub2_weight > 0:
tasks += ['ys']
if args.bwd_weight > 0:
tasks = ['ys.bwd'] + tasks
if args.ctc_weight > 0:
tasks = ['ys.ctc'] + tasks
if args.mbr_ce_weight > 0:
tasks = ['ys.mbr'] + tasks
for sub in ['sub1', 'sub2']:
if getattr(args, 'train_set_' + sub):
if getattr(args, sub + '_weight') - getattr(args, 'ctc_weight_' + sub) > 0:
tasks = ['ys_' + sub] + tasks
if getattr(args, 'ctc_weight_' + sub) > 0:
tasks = ['ys_' + sub + '.ctc'] + tasks
else:
tasks = ['all']
start_time_train = time.time()
start_time_epoch = time.time()
start_time_step = time.time()
accum_n_steps = 0
n_steps = optimizer.n_steps * args.accum_grad_n_steps
epoch_detail_prev = 0
for ep in range(resume_epoch, args.n_epochs):
pbar_epoch = tqdm(total=len(train_set))
session_prev = None
for batch_train, is_new_epoch in train_set:
# Compute loss in the training set
if args.discourse_aware and batch_train['sessions'][0] != session_prev:
model.module.reset_session()
session_prev = batch_train['sessions'][0]
accum_n_steps += 1
# Change mini-batch depending on task
if accum_n_steps == 1:
loss_train = 0 # moving average over gradient accumulation
for task in tasks:
loss, observation = model(batch_train, task,
teacher=teacher, teacher_lm=teacher_lm)
reporter.add(observation)
if use_apex:
with amp.scale_loss(loss, optimizer.optimizer) as scaled_loss:
scaled_loss.backward()
else:
loss.backward()
loss.detach() # Trancate the graph
loss_train = (loss_train * (accum_n_steps - 1) + loss.item()) / accum_n_steps
if accum_n_steps >= args.accum_grad_n_steps or is_new_epoch:
if args.clip_grad_norm > 0:
total_norm = torch.nn.utils.clip_grad_norm_(
model.module.parameters(), args.clip_grad_norm)
reporter.add_tensorboard_scalar('total_norm', total_norm)
optimizer.step()
optimizer.zero_grad()
accum_n_steps = 0
# NOTE: parameters are forcibly updated at the end of every epoch
del loss
pbar_epoch.update(len(batch_train['utt_ids']))
reporter.add_tensorboard_scalar('learning_rate', optimizer.lr)
# NOTE: loss/acc/ppl are already added in the model
reporter.step()
n_steps += 1
# NOTE: n_steps is different from the step counter in Noam Optimizer
if n_steps % args.print_step == 0:
# Compute loss in the dev set
batch_dev = iter(dev_set).next(batch_size=1 if 'transducer' in args.dec_type else None)[0]
# Change mini-batch depending on task
for task in tasks:
loss, observation = model(batch_dev, task, is_eval=True)
reporter.add(observation, is_eval=True)
loss_dev = loss.item()
del loss
reporter.step(is_eval=True)
duration_step = time.time() - start_time_step
if args.input_type == 'speech':
xlen = max(len(x) for x in batch_train['xs'])
ylen = max(len(y) for y in batch_train['ys'])
elif args.input_type == 'text':
xlen = max(len(x) for x in batch_train['ys'])
ylen = max(len(y) for y in batch_train['ys_sub1'])
logger.info("step:%d(ep:%.2f) loss:%.3f(%.3f)/lr:%.7f/bs:%d/xlen:%d/ylen:%d (%.2f min)" %
(n_steps, optimizer.n_epochs + train_set.epoch_detail,
loss_train, loss_dev,
optimizer.lr, len(batch_train['utt_ids']),
xlen, ylen, duration_step / 60))
start_time_step = time.time()
# Save fugures of loss and accuracy
if n_steps % (args.print_step * 10) == 0:
reporter.snapshot()
model.module.plot_attention()
model.module.plot_ctc()
# Ealuate model every 0.1 epoch during MBR training
if args.mbr_training:
if int(train_set.epoch_detail * 10) != int(epoch_detail_prev * 10):
# dev
evaluate([model.module], dev_set, recog_params, args,
int(train_set.epoch_detail * 10) / 10, logger)
# Save the model
optimizer.save_checkpoint(
model, save_path, remove_old=False, amp=amp,
epoch_detail=train_set.epoch_detail)
epoch_detail_prev = train_set.epoch_detail
if is_new_epoch:
break
# Save checkpoint and evaluate model per epoch
duration_epoch = time.time() - start_time_epoch
logger.info('========== EPOCH:%d (%.2f min) ==========' %
(optimizer.n_epochs + 1, duration_epoch / 60))
if optimizer.n_epochs + 1 < args.eval_start_epoch:
optimizer.epoch() # lr decay
reporter.epoch() # plot
# Save the model
optimizer.save_checkpoint(
model, save_path, remove_old=not is_transformer and args.remove_old_checkpoints, amp=amp)
else:
start_time_eval = time.time()
# dev
metric_dev = evaluate([model.module], dev_set, recog_params, args,
optimizer.n_epochs + 1, logger)
optimizer.epoch(metric_dev) # lr decay
reporter.epoch(metric_dev, name=args.metric) # plot
if optimizer.is_topk or is_transformer:
# Save the model
optimizer.save_checkpoint(
model, save_path, remove_old=not is_transformer and args.remove_old_checkpoints, amp=amp)
# test
if optimizer.is_topk:
for eval_set in eval_sets:
evaluate([model.module], eval_set, recog_params, args,
optimizer.n_epochs, logger)
duration_eval = time.time() - start_time_eval
logger.info('Evaluation time: %.2f min' % (duration_eval / 60))
# Early stopping
if optimizer.is_early_stop:
break
# Convert to fine-tuning stage
if optimizer.n_epochs == args.convert_to_sgd_epoch:
optimizer.convert_to_sgd(model, args.lr, args.weight_decay,
decay_type='always', decay_rate=0.5)
if optimizer.n_epochs >= args.n_epochs:
break
# if args.ss_prob > 0:
# model.module.scheduled_sampling_trigger()
start_time_step = time.time()
start_time_epoch = time.time()
duration_train = time.time() - start_time_train
logger.info('Total time: %.2f hour' % (duration_train / 3600))
reporter.tf_writer.close()
pbar_epoch.close()
return save_path