def do_training(args, module, data_train, data_val, begin_epoch=0):
from distutils.dir_util import mkpath
from log_util import LogUtil
log = LogUtil().getlogger()
mkpath(os.path.dirname(get_checkpoint_path(args)))
#seq_len = args.config.get('arch', 'max_t_count')
batch_size = args.config.getint('common', 'batch_size')
save_checkpoint_every_n_epoch = args.config.getint(
'common', 'save_checkpoint_every_n_epoch')
save_checkpoint_every_n_batch = args.config.getint(
'common', 'save_checkpoint_every_n_batch')
enable_logging_train_metric = args.config.getboolean(
'train', 'enable_logging_train_metric')
enable_logging_validation_metric = args.config.getboolean(
'train', 'enable_logging_validation_metric')
contexts = parse_contexts(args)
num_gpu = len(contexts)
eval_metric = STTMetric(batch_size=batch_size,
num_gpu=num_gpu,
is_logging=enable_logging_validation_metric,
is_epoch_end=True)
# mxboard setting
loss_metric = STTMetric(batch_size=batch_size,
num_gpu=num_gpu,
is_logging=enable_logging_train_metric,
is_epoch_end=False)
optimizer = args.config.get('optimizer', 'optimizer')
learning_rate = args.config.getfloat('train', 'learning_rate')
learning_rate_annealing = args.config.getfloat('train',
'learning_rate_annealing')
mode = args.config.get('common', 'mode')
num_epoch = args.config.getint('train', 'num_epoch')
clip_gradient = args.config.getfloat('optimizer', 'clip_gradient')
weight_decay = args.config.getfloat('optimizer', 'weight_decay')
save_optimizer_states = args.config.getboolean('train',
'save_optimizer_states')
show_every = args.config.getint('train', 'show_every')
optimizer_params_dictionary = json.loads(
args.config.get('optimizer', 'optimizer_params_dictionary'))
kvstore_option = args.config.get('common', 'kvstore_option')
n_epoch = begin_epoch
is_bucketing = args.config.getboolean('arch', 'is_bucketing')
if clip_gradient == 0:
clip_gradient = None
if is_bucketing and mode == 'load':
model_file = args.config.get('common', 'model_file')
model_name = os.path.splitext(model_file)[0]
model_num_epoch = int(model_name[-4:])
model_path = 'checkpoints/' + str(model_name[:-5])
symbol, data_names, label_names = module(1600)
model = STTBucketingModule(
sym_gen=module,
default_bucket_key=data_train.default_bucket_key,
context=contexts)
data_train.reset()
model.bind(data_shapes=data_train.provide_data,
label_shapes=data_train.provide_label,
for_training=True)
_, arg_params, aux_params = mx.model.load_checkpoint(
model_path, model_num_epoch)
model.set_params(arg_params, aux_params)
module = model
else:
module.bind(data_shapes=data_train.provide_data,
label_shapes=data_train.provide_label,
for_training=True)
if begin_epoch == 0 and mode == 'train':
module.init_params(initializer=get_initializer(args))
lr_scheduler = SimpleLRScheduler(learning_rate=learning_rate)
def reset_optimizer(force_init=False):
optimizer_params = {
'lr_scheduler': lr_scheduler,
'clip_gradient': clip_gradient,
'wd': weight_decay
}
optimizer_params.update(optimizer_params_dictionary)
module.init_optimizer(kvstore=kvstore_option,
optimizer=optimizer,
optimizer_params=optimizer_params,
force_init=force_init)
if mode == "train":
reset_optimizer(force_init=True)
else:
reset_optimizer(force_init=False)
data_train.reset()
data_train.is_first_epoch = True
#mxboard setting
mxlog_dir = args.config.get('common', 'mxboard_log_dir')
summary_writer = SummaryWriter(mxlog_dir)
while True:
if n_epoch >= num_epoch:
break
loss_metric.reset()
log.info('---------train---------')
for nbatch, data_batch in enumerate(data_train):
module.forward_backward(data_batch)
module.update()
# mxboard setting
if (nbatch + 1) % show_every == 0:
module.update_metric(loss_metric, data_batch.label)
#summary_writer.add_scalar('loss batch', loss_metric.get_batch_loss(), nbatch)
if (nbatch + 1) % save_checkpoint_every_n_batch == 0:
log.info('Epoch[%d] Batch[%d] SAVE CHECKPOINT', n_epoch,
nbatch)
module.save_checkpoint(
prefix=get_checkpoint_path(args) + "n_epoch" +
str(n_epoch) + "n_batch",
epoch=(int(
(nbatch + 1) / save_checkpoint_every_n_batch) - 1),
save_optimizer_states=save_optimizer_states)
# commented for Libri_sample data set to see only train cer
log.info('---------validation---------')
data_val.reset()
eval_metric.reset()
for nbatch, data_batch in enumerate(data_val):
# when is_train = False it leads to high cer when batch_norm
module.forward(data_batch, is_train=True)
module.update_metric(eval_metric, data_batch.label)
# mxboard setting
val_cer, val_n_label, val_l_dist, _ = eval_metric.get_name_value()
log.info("Epoch[%d] val cer=%f (%d / %d)", n_epoch, val_cer,
int(val_n_label - val_l_dist), val_n_label)
curr_acc = val_cer
summary_writer.add_scalar('CER validation', val_cer, n_epoch)
assert curr_acc is not None, 'cannot find Acc_exclude_padding in eval metric'
data_train.reset()
data_train.is_first_epoch = False
# mxboard setting
train_cer, train_n_label, train_l_dist, train_ctc_loss = loss_metric.get_name_value(
)
summary_writer.add_scalar('loss epoch', train_ctc_loss, n_epoch)
summary_writer.add_scalar('CER train', train_cer, n_epoch)
# save checkpoints
if n_epoch % save_checkpoint_every_n_epoch == 0:
log.info('Epoch[%d] SAVE CHECKPOINT', n_epoch)
module.save_checkpoint(prefix=get_checkpoint_path(args),
epoch=n_epoch,
save_optimizer_states=save_optimizer_states)
n_epoch += 1
lr_scheduler.learning_rate = learning_rate / learning_rate_annealing
log.info('FINISH')
def do_training(args, module, data_train, data_val, begin_epoch=0, kv=None):
from distutils.dir_util import mkpath
host_name = socket.gethostname()
log = LogUtil().getlogger()
mkpath(os.path.dirname(config_util.get_checkpoint_path(args)))
# seq_len = args.config.get('arch', 'max_t_count')
batch_size = args.config.getint('common', 'batch_size')
val_batch_size = args.config.getint('common', 'val_batch_size')
save_checkpoint_every_n_epoch = args.config.getint(
'common', 'save_checkpoint_every_n_epoch')
save_checkpoint_every_n_batch = args.config.getint(
'common', 'save_checkpoint_every_n_batch')
enable_logging_train_metric = args.config.getboolean(
'train', 'enable_logging_train_metric')
enable_logging_validation_metric = args.config.getboolean(
'train', 'enable_logging_validation_metric')
contexts = config_util.parse_contexts(args)
num_gpu = len(contexts)
eval_metric = STTMetric(batch_size=val_batch_size,
num_gpu=num_gpu,
is_logging=enable_logging_validation_metric,
is_epoch_end=True)
# tensorboard setting
loss_metric = STTMetric(batch_size=batch_size,
num_gpu=num_gpu,
is_logging=enable_logging_train_metric,
is_epoch_end=False)
optimizer = args.config.get('optimizer', 'optimizer')
learning_rate = args.config.getfloat('train', 'learning_rate')
learning_rate_start = args.config.getfloat('train', 'learning_rate_start')
learning_rate_annealing = args.config.getfloat('train',
'learning_rate_annealing')
lr_factor = args.config.getfloat('train', 'lr_factor')
mode = args.config.get('common', 'mode')
num_epoch = args.config.getint('train', 'num_epoch')
clip_gradient = args.config.getfloat('optimizer', 'clip_gradient')
weight_decay = args.config.getfloat('optimizer', 'weight_decay')
save_optimizer_states = args.config.getboolean('train',
'save_optimizer_states')
show_every = args.config.getint('train', 'show_every')
optimizer_params_dictionary = json.loads(
args.config.get('optimizer', 'optimizer_params_dictionary'))
kvstore_option = args.config.get('common', 'kvstore_option')
n_epoch = begin_epoch
is_bucketing = args.config.getboolean('arch', 'is_bucketing')
# kv = mx.kv.create(kvstore_option)
# data = mx.io.ImageRecordIter(num_parts=kv.num_workers, part_index=kv.rank)
# # a.set_optimizer(optimizer)
# updater = mx.optimizer.get_updater(optimizer)
# a._set_updater(updater=updater)
if clip_gradient == 0:
clip_gradient = None
if is_bucketing and mode == 'load':
model_file = args.config.get('common', 'model_file')
model_name = os.path.splitext(model_file)[0]
model_num_epoch = int(model_name[-4:])
model_path = 'checkpoints/' + str(model_name[:-5])
prefix = args.config.get('common', 'prefix')
if os.path.isabs(prefix):
model_path = config_util.get_checkpoint_path(args).rsplit(
"/", 1)[0] + "/" + str(model_name[:-5])
# symbol, data_names, label_names = module(1600)
model = mx.mod.BucketingModule(
sym_gen=module,
default_bucket_key=data_train.default_bucket_key,
context=contexts)
data_train.reset()
model.bind(data_shapes=data_train.provide_data,
label_shapes=data_train.provide_label,
for_training=True)
_, arg_params, aux_params = mx.model.load_checkpoint(
model_path, model_num_epoch)
# arg_params2 = {}
# for item in arg_params.keys():
# if not item.startswith("forward") and not item.startswith("backward") and not item.startswith("rear"):
# arg_params2[item] = arg_params[item]
# model.set_params(arg_params2, aux_params, allow_missing=True, allow_extra=True)
model.set_params(arg_params, aux_params)
module = model
else:
module.bind(data_shapes=data_train.provide_data,
label_shapes=data_train.provide_label,
for_training=True)
if begin_epoch == 0 and mode == 'train':
module.init_params(initializer=get_initializer(args))
# model_file = args.config.get('common', 'model_file')
# model_name = os.path.splitext(model_file)[0]
# model_num_epoch = int(model_name[-4:])
# model_path = 'checkpoints/' + str(model_name[:-5])
# _, arg_params, aux_params = mx.model.load_checkpoint(model_path, model_num_epoch)
# arg_params2 = {}
# for item in arg_params.keys():
# if not item.startswith("forward") and not item.startswith("backward") and not item.startswith("rear"):
# arg_params2[item] = arg_params[item]
# module.set_params(arg_params, aux_params, allow_missing=True, allow_extra=True)
lr_scheduler = SimpleLRScheduler(learning_rate=learning_rate)
# lr, lr_scheduler = _get_lr_scheduler(args, kv)
def reset_optimizer(force_init=False):
optimizer_params = {
'lr_scheduler': lr_scheduler,
'clip_gradient': clip_gradient,
'wd': weight_decay
}
optimizer_params.update(optimizer_params_dictionary)
module.init_optimizer(kvstore=kv,
optimizer=optimizer,
optimizer_params=optimizer_params,
force_init=force_init)
if mode == "train":
reset_optimizer(force_init=True)
else:
reset_optimizer(force_init=False)
data_train.reset()
data_train.is_first_epoch = True
# tensorboard setting
tblog_dir = args.config.get('common', 'tensorboard_log_dir')
summary_writer = SummaryWriter(tblog_dir)
learning_rate_pre = 0
while True:
if n_epoch >= num_epoch:
break
loss_metric.reset()
log.info(host_name + '---------train---------')
step_epochs = [
int(l)
for l in args.config.get('train', 'lr_step_epochs').split(',')
]
# warm up to step_epochs[0] if step_epochs[0] > 0
if n_epoch < step_epochs[0]:
learning_rate_cur = learning_rate_start + n_epoch * (
learning_rate - learning_rate_start) / step_epochs[0]
else:
# scaling lr every epoch
if len(step_epochs) == 1:
learning_rate_cur = learning_rate
for s in range(n_epoch):
learning_rate_cur /= learning_rate_annealing
# scaling lr by step_epochs[1:]
else:
learning_rate_cur = learning_rate
for s in step_epochs[1:]:
if n_epoch > s:
learning_rate_cur *= lr_factor
if learning_rate_pre and args.config.getboolean(
'train', 'momentum_correction'):
lr_scheduler.learning_rate = learning_rate_cur * learning_rate_cur / learning_rate_pre
else:
lr_scheduler.learning_rate = learning_rate_cur
learning_rate_pre = learning_rate_cur
log.info("n_epoch %d's lr is %.7f" %
(n_epoch, lr_scheduler.learning_rate))
summary_writer.add_scalar('lr', lr_scheduler.learning_rate, n_epoch)
for nbatch, data_batch in enumerate(data_train):
module.forward_backward(data_batch)
module.update()
# tensorboard setting
if (nbatch + 1) % show_every == 0:
# loss_metric.set_audio_paths(data_batch.index)
module.update_metric(loss_metric, data_batch.label)
# print("loss=========== %.2f" % loss_metric.get_batch_loss())
# summary_writer.add_scalar('loss batch', loss_metric.get_batch_loss(), nbatch)
if (nbatch + 1) % save_checkpoint_every_n_batch == 0:
log.info('Epoch[%d] Batch[%d] SAVE CHECKPOINT', n_epoch,
nbatch)
save_checkpoint(
module,
prefix=config_util.get_checkpoint_path(args) + "n_epoch" +
str(n_epoch) + "n_batch",
epoch=(int(
(nbatch + 1) / save_checkpoint_every_n_batch) - 1),
save_optimizer_states=save_optimizer_states)
# commented for Libri_sample data set to see only train cer
log.info(host_name + '---------validation---------')
data_val.reset()
eval_metric.reset()
for nbatch, data_batch in enumerate(data_val):
# when is_train = False it leads to high cer when batch_norm
module.forward(data_batch, is_train=True)
eval_metric.set_audio_paths(data_batch.index)
module.update_metric(eval_metric, data_batch.label)
# tensorboard setting
val_cer, val_n_label, val_l_dist, val_ctc_loss = eval_metric.get_name_value(
)
log.info("Epoch[%d] val cer=%f (%d / %d), ctc_loss=%f", n_epoch,
val_cer, int(val_n_label - val_l_dist), val_n_label,
val_ctc_loss)
curr_acc = val_cer
summary_writer.add_scalar('CER validation', val_cer, n_epoch)
summary_writer.add_scalar('loss validation', val_ctc_loss, n_epoch)
assert curr_acc is not None, 'cannot find Acc_exclude_padding in eval metric'
np.random.seed(n_epoch)
data_train.reset()
data_train.is_first_epoch = False
# tensorboard setting
train_cer, train_n_label, train_l_dist, train_ctc_loss = loss_metric.get_name_value(
)
summary_writer.add_scalar('loss epoch', train_ctc_loss, n_epoch)
summary_writer.add_scalar('CER train', train_cer, n_epoch)
# save checkpoints
if n_epoch % save_checkpoint_every_n_epoch == 0:
log.info('Epoch[%d] SAVE CHECKPOINT', n_epoch)
save_checkpoint(module,
prefix=config_util.get_checkpoint_path(args),
epoch=n_epoch,
save_optimizer_states=save_optimizer_states)
n_epoch += 1
log.info('FINISH')
def do_training(args, module, data_train, data_val, begin_epoch=0):
from distutils.dir_util import mkpath
from log_util import LogUtil
log = LogUtil.getInstance().getlogger()
mkpath(os.path.dirname(get_checkpoint_path(args)))
#seq_len = args.config.get('arch', 'max_t_count')
batch_size = args.config.getint('common', 'batch_size')
save_checkpoint_every_n_epoch = args.config.getint('common', 'save_checkpoint_every_n_epoch')
save_checkpoint_every_n_batch = args.config.getint('common', 'save_checkpoint_every_n_batch')
enable_logging_train_metric = args.config.getboolean('train', 'enable_logging_train_metric')
enable_logging_validation_metric = args.config.getboolean('train', 'enable_logging_validation_metric')
contexts = parse_contexts(args)
num_gpu = len(contexts)
eval_metric = STTMetric(batch_size=batch_size, num_gpu=num_gpu, is_logging=enable_logging_validation_metric,is_epoch_end=True)
# mxboard setting
loss_metric = STTMetric(batch_size=batch_size, num_gpu=num_gpu, is_logging=enable_logging_train_metric,is_epoch_end=False)
optimizer = args.config.get('optimizer', 'optimizer')
learning_rate = args.config.getfloat('train', 'learning_rate')
learning_rate_annealing = args.config.getfloat('train', 'learning_rate_annealing')
mode = args.config.get('common', 'mode')
num_epoch = args.config.getint('train', 'num_epoch')
clip_gradient = args.config.getfloat('optimizer', 'clip_gradient')
weight_decay = args.config.getfloat('optimizer', 'weight_decay')
save_optimizer_states = args.config.getboolean('train', 'save_optimizer_states')
show_every = args.config.getint('train', 'show_every')
optimizer_params_dictionary = json.loads(args.config.get('optimizer', 'optimizer_params_dictionary'))
kvstore_option = args.config.get('common', 'kvstore_option')
n_epoch=begin_epoch
is_bucketing = args.config.getboolean('arch', 'is_bucketing')
if clip_gradient == 0:
clip_gradient = None
if is_bucketing and mode == 'load':
model_file = args.config.get('common', 'model_file')
model_name = os.path.splitext(model_file)[0]
model_num_epoch = int(model_name[-4:])
model_path = 'checkpoints/' + str(model_name[:-5])
symbol, data_names, label_names = module(1600)
model = STTBucketingModule(
sym_gen=module,
default_bucket_key=data_train.default_bucket_key,
context=contexts)
data_train.reset()
model.bind(data_shapes=data_train.provide_data,
label_shapes=data_train.provide_label,
for_training=True)
_, arg_params, aux_params = mx.model.load_checkpoint(model_path, model_num_epoch)
model.set_params(arg_params, aux_params)
module = model
else:
module.bind(data_shapes=data_train.provide_data,
label_shapes=data_train.provide_label,
for_training=True)
if begin_epoch == 0 and mode == 'train':
module.init_params(initializer=get_initializer(args))
lr_scheduler = SimpleLRScheduler(learning_rate=learning_rate)
def reset_optimizer(force_init=False):
optimizer_params = {'lr_scheduler': lr_scheduler,
'clip_gradient': clip_gradient,
'wd': weight_decay}
optimizer_params.update(optimizer_params_dictionary)
module.init_optimizer(kvstore=kvstore_option,
optimizer=optimizer,
optimizer_params=optimizer_params,
force_init=force_init)
if mode == "train":
reset_optimizer(force_init=True)
else:
reset_optimizer(force_init=False)
data_train.reset()
data_train.is_first_epoch = True
#mxboard setting
mxlog_dir = args.config.get('common', 'mxboard_log_dir')
summary_writer = SummaryWriter(mxlog_dir)
while True:
if n_epoch >= num_epoch:
break
loss_metric.reset()
log.info('---------train---------')
for nbatch, data_batch in enumerate(data_train):
module.forward_backward(data_batch)
module.update()
# mxboard setting
if (nbatch + 1) % show_every == 0:
module.update_metric(loss_metric, data_batch.label)
#summary_writer.add_scalar('loss batch', loss_metric.get_batch_loss(), nbatch)
if (nbatch+1) % save_checkpoint_every_n_batch == 0:
log.info('Epoch[%d] Batch[%d] SAVE CHECKPOINT', n_epoch, nbatch)
module.save_checkpoint(prefix=get_checkpoint_path(args)+"n_epoch"+str(n_epoch)+"n_batch", epoch=(int((nbatch+1)/save_checkpoint_every_n_batch)-1), save_optimizer_states=save_optimizer_states)
# commented for Libri_sample data set to see only train cer
log.info('---------validation---------')
data_val.reset()
eval_metric.reset()
for nbatch, data_batch in enumerate(data_val):
# when is_train = False it leads to high cer when batch_norm
module.forward(data_batch, is_train=True)
module.update_metric(eval_metric, data_batch.label)
# mxboard setting
val_cer, val_n_label, val_l_dist, _ = eval_metric.get_name_value()
log.info("Epoch[%d] val cer=%f (%d / %d)", n_epoch, val_cer, int(val_n_label - val_l_dist), val_n_label)
curr_acc = val_cer
summary_writer.add_scalar('CER validation', val_cer, n_epoch)
assert curr_acc is not None, 'cannot find Acc_exclude_padding in eval metric'
data_train.reset()
data_train.is_first_epoch = False
# mxboard setting
train_cer, train_n_label, train_l_dist, train_ctc_loss = loss_metric.get_name_value()
summary_writer.add_scalar('loss epoch', train_ctc_loss, n_epoch)
summary_writer.add_scalar('CER train', train_cer, n_epoch)
# save checkpoints
if n_epoch % save_checkpoint_every_n_epoch == 0:
log.info('Epoch[%d] SAVE CHECKPOINT', n_epoch)
module.save_checkpoint(prefix=get_checkpoint_path(args), epoch=n_epoch, save_optimizer_states=save_optimizer_states)
n_epoch += 1
lr_scheduler.learning_rate=learning_rate/learning_rate_annealing
log.info('FINISH')
def do_training(args, module, data_train, data_val, begin_epoch=0):
from distutils.dir_util import mkpath
from log_util import LogUtil
log = LogUtil().getlogger()
mkpath(os.path.dirname(get_checkpoint_path(args)))
seq_len = args.config.get('arch', 'max_t_count')
batch_size = args.config.getint('common', 'batch_size')
save_checkpoint_every_n_epoch = args.config.getint('common', 'save_checkpoint_every_n_epoch')
save_checkpoint_every_n_batch = args.config.getint('common', 'save_checkpoint_every_n_batch')
enable_logging_train_metric = args.config.getboolean('train', 'enable_logging_train_metric')
enable_logging_validation_metric = args.config.getboolean('train', 'enable_logging_validation_metric')
contexts = parse_contexts(args)
num_gpu = len(contexts)
eval_metric = STTMetric(batch_size=batch_size, num_gpu=num_gpu, seq_length=seq_len,is_logging=enable_logging_validation_metric,is_epoch_end=True)
# tensorboard setting
loss_metric = STTMetric(batch_size=batch_size, num_gpu=num_gpu, seq_length=seq_len,is_logging=enable_logging_train_metric,is_epoch_end=False)
optimizer = args.config.get('train', 'optimizer')
momentum = args.config.getfloat('train', 'momentum')
learning_rate = args.config.getfloat('train', 'learning_rate')
learning_rate_annealing = args.config.getfloat('train', 'learning_rate_annealing')
mode = args.config.get('common', 'mode')
num_epoch = args.config.getint('train', 'num_epoch')
clip_gradient = args.config.getfloat('train', 'clip_gradient')
weight_decay = args.config.getfloat('train', 'weight_decay')
save_optimizer_states = args.config.getboolean('train', 'save_optimizer_states')
show_every = args.config.getint('train', 'show_every')
n_epoch=begin_epoch
if clip_gradient == 0:
clip_gradient = None
module.bind(data_shapes=data_train.provide_data,
label_shapes=data_train.provide_label,
for_training=True)
if begin_epoch == 0 and mode == 'train':
module.init_params(initializer=get_initializer(args))
lr_scheduler = SimpleLRScheduler(learning_rate=learning_rate)
def reset_optimizer(force_init=False):
if optimizer == "sgd":
module.init_optimizer(kvstore='device',
optimizer=optimizer,
optimizer_params={'lr_scheduler': lr_scheduler,
'momentum': momentum,
'clip_gradient': clip_gradient,
'wd': weight_decay},
force_init=force_init)
elif optimizer == "adam":
module.init_optimizer(kvstore='device',
optimizer=optimizer,
optimizer_params={'lr_scheduler': lr_scheduler,
#'momentum': momentum,
'clip_gradient': clip_gradient,
'wd': weight_decay},
force_init=force_init)
else:
raise Exception('Supported optimizers are sgd and adam. If you want to implement others define them in train.py')
if mode == "train":
reset_optimizer(force_init=True)
else:
reset_optimizer(force_init=False)
#tensorboard setting
tblog_dir = args.config.get('common', 'tensorboard_log_dir')
summary_writer = SummaryWriter(tblog_dir)
while True:
if n_epoch >= num_epoch:
break
loss_metric.reset()
log.info('---------train---------')
for nbatch, data_batch in enumerate(data_train):
module.forward_backward(data_batch)
module.update()
# tensorboard setting
if (nbatch + 1) % show_every == 0:
module.update_metric(loss_metric, data_batch.label)
#summary_writer.add_scalar('loss batch', loss_metric.get_batch_loss(), nbatch)
if (nbatch+1) % save_checkpoint_every_n_batch == 0:
log.info('Epoch[%d] Batch[%d] SAVE CHECKPOINT', n_epoch, nbatch)
module.save_checkpoint(prefix=get_checkpoint_path(args)+"n_epoch"+str(n_epoch)+"n_batch", epoch=(int((nbatch+1)/save_checkpoint_every_n_batch)-1), save_optimizer_states=save_optimizer_states)
# commented for Libri_sample data set to see only train cer
log.info('---------validation---------')
data_val.reset()
eval_metric.reset()
for nbatch, data_batch in enumerate(data_val):
# when is_train = False it leads to high cer when batch_norm
module.forward(data_batch, is_train=True)
module.update_metric(eval_metric, data_batch.label)
# tensorboard setting
val_cer, val_n_label, val_l_dist, _ = eval_metric.get_name_value()
log.info("Epoch[%d] val cer=%f (%d / %d)", n_epoch, val_cer, int(val_n_label - val_l_dist), val_n_label)
curr_acc = val_cer
summary_writer.add_scalar('CER validation', val_cer, n_epoch)
assert curr_acc is not None, 'cannot find Acc_exclude_padding in eval metric'
data_train.reset()
# tensorboard setting
train_cer, train_n_label, train_l_dist, train_ctc_loss = loss_metric.get_name_value()
summary_writer.add_scalar('loss epoch', train_ctc_loss, n_epoch)
summary_writer.add_scalar('CER train', train_cer, n_epoch)
# save checkpoints
if n_epoch % save_checkpoint_every_n_epoch == 0:
log.info('Epoch[%d] SAVE CHECKPOINT', n_epoch)
module.save_checkpoint(prefix=get_checkpoint_path(args), epoch=n_epoch, save_optimizer_states=save_optimizer_states)
n_epoch += 1
lr_scheduler.learning_rate=learning_rate/learning_rate_annealing
log.info('FINISH')