def convert(parser):
args = parser.parse_args()
torch.manual_seed(args.seed)
torch.cuda.manual_seed_all(args.seed)
if params.rnn_type == 'gru' and params.rnn_act_type != 'tanh':
print("ERROR: GRU does not currently support activations other than tanh")
sys.exit()
if params.rnn_type == 'rnn' and params.rnn_act_type != 'relu':
print("ERROR: We should be using ReLU RNNs")
sys.exit()
print("=======================================================")
for arg in vars(args):
print("***%s = %s " % (arg.ljust(25), getattr(args, arg)))
print("=======================================================")
save_folder = args.save_folder
try:
os.makedirs(save_folder)
except OSError as e:
if e.errno == errno.EEXIST:
print('Directory already exists.')
else:
raise
with open(params.labels_path) as label_file:
labels = str(''.join(json.load(label_file)))
audio_conf = dict(sample_rate=params.sample_rate,
window_size=params.window_size,
window_stride=params.window_stride,
window=params.window,
noise_dir=params.noise_dir,
noise_prob=params.noise_prob,
noise_levels=(params.noise_min, params.noise_max))
val_batch_size = min(8,params.batch_size_val)
print("Using bs={} for validation. Parameter found was {}".format(val_batch_size,params.batch_size_val))
train_dataset = SpectrogramDataset(audio_conf=audio_conf, manifest_filepath=params.train_manifest, labels=labels,
normalize=True, augment=params.augment)
test_dataset = SpectrogramDataset(audio_conf=audio_conf, manifest_filepath=params.val_manifest, labels=labels,
normalize=True, augment=False)
train_loader = AudioDataLoader(train_dataset, batch_size=params.batch_size,
num_workers=(1 if params.cuda else 1))
test_loader = AudioDataLoader(test_dataset, batch_size=val_batch_size,
num_workers=(1 if params.cuda else 1))
rnn_type = params.rnn_type.lower()
assert rnn_type in supported_rnns, "rnn_type should be either lstm, rnn or gru"
model = DeepSpeech(rnn_hidden_size = params.hidden_size,
nb_layers = params.hidden_layers,
labels = labels,
rnn_type = supported_rnns[rnn_type],
audio_conf = audio_conf,
bidirectional = False,
rnn_activation = params.rnn_act_type,
bias = params.bias)
parameters = model.parameters()
if args.continue_from:
print("Loading checkpoint model %s" % args.continue_from)
package = torch.load(args.continue_from)
model.load_state_dict(package['state_dict'])
if params.cuda:
model = model.cuda()
if params.cuda:
model = torch.nn.DataParallel(model).cuda()
print(model)
print("Number of parameters: %d" % DeepSpeech.get_param_size(model))
####################################################
# Begin ONNX conversion
####################################################
model.train(False)
# Input to the model
data = next(iter(train_loader))
inputs, targets, input_percentages, target_sizes = data
inputs = Variable(inputs, requires_grad=False)
target_sizes = Variable(target_sizes, requires_grad=False)
targets = Variable(targets, requires_grad=False)
if params.cuda:
inputs = inputs.cuda()
x = inputs
print(x.size())
# Export the model
onnx_file_path = osp.join(osp.dirname(args.continue_from),osp.basename(args.continue_from).split('.')[0]+".onnx")
print("Saving new ONNX model to: {}".format(onnx_file_path))
torch.onnx.export(model, # model being run
inputs, # model input (or a tuple for multiple inputs)
onnx_file_path, # where to save the model (can be a file or file-like object)
export_params=True, # store the trained parameter weights inside the model file
verbose=False)
batch_size=args.batch_size,
num_replicas=args.world_size,
rank=args.rank)
train_loader = AudioDataLoader(train_dataset,
num_workers=args.num_workers,
batch_sampler=train_sampler)
test_loader = AudioDataLoader(test_dataset,
batch_size=args.batch_size,
num_workers=args.num_workers)
if (not args.no_shuffle and start_epoch != 0) or args.no_sorta_grad:
print("Shuffling batches for the following epochs")
train_sampler.shuffle(start_epoch)
if args.cuda:
model.cuda()
if args.distributed:
model = torch.nn.parallel.DistributedDataParallel(
model,
device_ids=(int(args.gpu_rank), ) if args.rank else None)
print(model)
print("Number of parameters: %d" % DeepSpeech.get_param_size(model))
batch_time = AverageMeter()
data_time = AverageMeter()
losses = AverageMeter()
for epoch in range(start_epoch, args.epochs):
model.train()
end = time.time()
train_loader = AudioDataLoader(train_dataset,
num_workers=args.num_workers,
batch_sampler=train_sampler)
test_loader = AudioDataLoader(test_dataset,
batch_size=args.batch_size,
num_workers=args.num_workers)
if (not args.no_shuffle and start_epoch != 0) or args.no_sorta_grad:
print("Shuffling batches for the following epochs")
train_sampler.shuffle(start_epoch)
if args.cuda and not args.distributed:
model_teacher = torch.nn.DataParallel(model_teacher).cuda()
model_student = torch.nn.DataParallel(model_student).cuda()
elif args.cuda and args.distributed:
model_teacher.cuda()
model_teacher = torch.nn.parallel.DistributedDataParallel(
model_teacher, device_ids=(args.gpu_rank, ) if args.rank else None)
model_student.cuda()
model_student = torch.nn.parallel.DistributedDataParallel(
model_student, device_ids=(args.gpu_rank, ) if args.rank else None)
print(model_student)
print("Number of parameters: %d" %
DeepSpeech.get_param_size(model_student))
batch_time = AverageMeter()
data_time = AverageMeter()
losses = AverageMeter()
for epoch in range(start_epoch, args.epochs):
def train_main(args):
args.distributed = args.world_size > 1
main_proc = True
if args.distributed:
if args.gpu_rank:
torch.cuda.set_device(int(args.gpu_rank))
dist.init_process_group(backend=args.dist_backend, init_method=args.dist_url,
world_size=args.world_size, rank=args.rank)
main_proc = args.rank == 0 # Only the first proc should save models
save_folder = args.save_folder
loss_results, cer_results, wer_results = torch.Tensor(args.epochs), torch.Tensor(args.epochs), torch.Tensor(
args.epochs)
best_wer = None
if args.visdom and main_proc:
from visdom import Visdom
viz = Visdom()
opts = dict(title=args.id, ylabel='', xlabel='Epoch', legend=['Loss', 'WER', 'CER'])
viz_window = None
epochs = torch.arange(1, args.epochs + 1)
if args.tensorboard and main_proc:
os.makedirs(args.log_dir, exist_ok=True)
from tensorboardX import SummaryWriter
tensorboard_writer = SummaryWriter(args.log_dir)
os.makedirs(save_folder, exist_ok=True)
avg_loss, start_epoch, start_iter = 0, 0, 0
if args.continue_from: # Starting from previous model
print("Loading checkpoint model %s" % args.continue_from)
package = torch.load(args.continue_from, map_location=lambda storage, loc: storage)
model = DeepSpeech.load_model_package(package)
labels = DeepSpeech.get_labels(model)
audio_conf = DeepSpeech.get_audio_conf(model)
parameters = model.parameters()
optimizer = torch.optim.SGD(parameters, lr=args.lr,
momentum=args.momentum, nesterov=True)
if not args.finetune: # Don't want to restart training
if args.cuda:
model.cuda()
optimizer.load_state_dict(package['optim_dict'])
start_epoch = int(package.get('epoch', 1)) - 1 # Index start at 0 for training
start_iter = package.get('iteration', None)
if start_iter is None:
start_epoch += 1 # We saved model after epoch finished, start at the next epoch.
start_iter = 0
else:
start_iter += 1
avg_loss = int(package.get('avg_loss', 0))
loss_results, cer_results, wer_results = package['loss_results'], package[
'cer_results'], package['wer_results']
if main_proc and args.visdom and \
package[
'loss_results'] is not None and start_epoch > 0: # Add previous scores to visdom graph
x_axis = epochs[0:start_epoch]
y_axis = torch.stack(
(loss_results[0:start_epoch], wer_results[0:start_epoch], cer_results[0:start_epoch]),
dim=1)
viz_window = viz.line(
X=x_axis,
Y=y_axis,
opts=opts,
)
if main_proc and args.tensorboard and \
package[
'loss_results'] is not None and start_epoch > 0: # Previous scores to tensorboard logs
for i in range(start_epoch):
values = {
'Avg Train Loss': loss_results[i],
'Avg WER': wer_results[i],
'Avg CER': cer_results[i]
}
tensorboard_writer.add_scalars(args.id, values, i + 1)
else:
with open(args.labels_path) as label_file:
labels = str(''.join(json.load(label_file)))
audio_conf = dict(sample_rate=args.sample_rate,
window_size=args.window_size,
window_stride=args.window_stride,
window=args.window,
noise_dir=args.noise_dir,
noise_prob=args.noise_prob,
noise_levels=(args.noise_min, args.noise_max))
rnn_type = args.rnn_type.lower()
assert rnn_type in supported_rnns, "rnn_type should be either lstm, rnn or gru"
model = DeepSpeech(rnn_hidden_size=args.hidden_size,
nb_layers=args.hidden_layers,
labels=labels,
rnn_type=supported_rnns[rnn_type],
audio_conf=audio_conf,
bidirectional=args.bidirectional)
parameters = model.parameters()
optimizer = torch.optim.SGD(parameters, lr=args.lr,
momentum=args.momentum, nesterov=True)
criterion = CTCLoss()
decoder = GreedyDecoder(labels)
train_dataset = SpectrogramDataset(audio_conf=audio_conf, manifest_filepath=args.train_manifest, labels=labels,
normalize=True, augment=args.augment)
test_dataset = SpectrogramDataset(audio_conf=audio_conf, manifest_filepath=args.val_manifest, labels=labels,
normalize=True, augment=False)
if not args.distributed:
train_sampler = BucketingSampler(train_dataset, batch_size=args.batch_size)
else:
train_sampler = DistributedBucketingSampler(train_dataset, batch_size=args.batch_size,
num_replicas=args.world_size, rank=args.rank)
train_loader = AudioDataLoader(train_dataset,
num_workers=args.num_workers, batch_sampler=train_sampler)
test_loader = AudioDataLoader(test_dataset, batch_size=args.batch_size,
num_workers=args.num_workers)
if (not args.no_shuffle and start_epoch != 0) or args.no_sorta_grad:
print("Shuffling batches for the following epochs")
train_sampler.shuffle(start_epoch)
if args.cuda:
model.cuda()
if args.distributed:
model = torch.nn.parallel.DistributedDataParallel(model,
device_ids=(int(args.gpu_rank),) if args.rank else None)
print(model)
print("Number of parameters: %d" % DeepSpeech.get_param_size(model))
batch_time = AverageMeter()
data_time = AverageMeter()
losses = AverageMeter()
for epoch in range(start_epoch, args.epochs):
model.train()
end = time.time()
start_epoch_time = time.time()
for i, (data) in enumerate(train_loader, start=start_iter):
if i == len(train_sampler):
break
inputs, targets, input_percentages, target_sizes = data
input_sizes = input_percentages.mul_(int(inputs.size(3))).int()
# measure data loading time
data_time.update(time.time() - end)
if args.cuda:
inputs = inputs.cuda()
out, output_sizes = model(inputs, input_sizes)
out = out.transpose(0, 1) # TxNxH
loss = criterion(out, targets, output_sizes, target_sizes)
loss = loss / inputs.size(0) # average the loss by minibatch
inf = float("inf")
if args.distributed:
loss_value = reduce_tensor(loss, args.world_size)[0]
else:
loss_value = loss.item()
if loss_value == inf or loss_value == -inf:
print("WARNING: received an inf loss, setting loss value to 0")
loss_value = 0
avg_loss += loss_value
losses.update(loss_value, inputs.size(0))
# compute gradient
optimizer.zero_grad()
loss.backward()
torch.nn.utils.clip_grad_norm_(model.parameters(), args.max_norm)
# SGD step
optimizer.step()
# measure elapsed time
batch_time.update(time.time() - end)
end = time.time()
if not args.silent:
print('Epoch: [{0}][{1}/{2}]\t'
'Time {batch_time.val:.3f} ({batch_time.avg:.3f})\t'
'Data {data_time.val:.3f} ({data_time.avg:.3f})\t'
'Loss {loss.val:.4f} ({loss.avg:.4f})\t'.format(
(epoch + 1), (i + 1), len(train_sampler), batch_time=batch_time, data_time=data_time, loss=losses))
if args.checkpoint_per_batch > 0 and i > 0 and (i + 1) % args.checkpoint_per_batch == 0 and main_proc:
file_path = '%s/deepspeech_checkpoint_epoch_%d_iter_%d.pth' % (save_folder, epoch + 1, i + 1)
print("Saving checkpoint model to %s" % file_path)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, iteration=i,
loss_results=loss_results,
wer_results=wer_results, cer_results=cer_results, avg_loss=avg_loss),
file_path)
del loss
del out
avg_loss /= len(train_sampler)
epoch_time = time.time() - start_epoch_time
print('Training Summary Epoch: [{0}]\t'
'Time taken (s): {epoch_time:.0f}\t'
'Average Loss {loss:.3f}\t'.format(epoch + 1, epoch_time=epoch_time, loss=avg_loss))
start_iter = 0 # Reset start iteration for next epoch
total_cer, total_wer = 0, 0
model.eval()
with torch.no_grad():
for i, (data) in tqdm(enumerate(test_loader), total=len(test_loader)):
inputs, targets, input_percentages, target_sizes = data
input_sizes = input_percentages.mul_(int(inputs.size(3))).int()
# unflatten targets
split_targets = []
offset = 0
for size in target_sizes:
split_targets.append(targets[offset:offset + size])
offset += size
if args.cuda:
inputs = inputs.cuda()
out, output_sizes = model(inputs, input_sizes)
decoded_output, _ = decoder.decode(out.data, output_sizes)
target_strings = decoder.convert_to_strings(split_targets)
wer, cer = 0, 0
for x in range(len(target_strings)):
transcript, reference = decoded_output[x][0], target_strings[x][0]
wer += decoder.wer(transcript, reference) / float(len(reference.split()))
cer += decoder.cer(transcript, reference) / float(len(reference))
total_cer += cer
total_wer += wer
del out
wer = total_wer / len(test_loader.dataset)
cer = total_cer / len(test_loader.dataset)
wer *= 100
cer *= 100
loss_results[epoch] = avg_loss
wer_results[epoch] = wer
cer_results[epoch] = cer
print('Validation Summary Epoch: [{0}]\t'
'Average WER {wer:.3f}\t'
'Average CER {cer:.3f}\t'.format(epoch + 1, wer=wer, cer=cer))
if args.visdom and main_proc:
x_axis = epochs[0:epoch + 1]
y_axis = torch.stack(
(loss_results[0:epoch + 1], wer_results[0:epoch + 1], cer_results[0:epoch + 1]), dim=1)
if viz_window is None:
viz_window = viz.line(
X=x_axis,
Y=y_axis,
opts=opts,
)
else:
viz.line(
X=x_axis.unsqueeze(0).expand(y_axis.size(1), x_axis.size(0)).transpose(0, 1), # Visdom fix
Y=y_axis,
win=viz_window,
update='replace',
)
if args.tensorboard and main_proc:
values = {
'Avg Train Loss': avg_loss,
'Avg WER': wer,
'Avg CER': cer
}
tensorboard_writer.add_scalars(args.id, values, epoch + 1)
if args.log_params:
for tag, value in model.named_parameters():
tag = tag.replace('.', '/')
tensorboard_writer.add_histogram(tag, to_np(value), epoch + 1)
tensorboard_writer.add_histogram(tag + '/grad', to_np(value.grad), epoch + 1)
if args.checkpoint and main_proc:
file_path = '%s/deepspeech_%d.pth' % (save_folder, epoch + 1)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, loss_results=loss_results,
wer_results=wer_results, cer_results=cer_results),
file_path)
# anneal lr
optim_state = optimizer.state_dict()
optim_state['param_groups'][0]['lr'] = optim_state['param_groups'][0]['lr'] / args.learning_anneal
optimizer.load_state_dict(optim_state)
print('Learning rate annealed to: {lr:.6f}'.format(lr=optim_state['param_groups'][0]['lr']))
if (best_wer is None or best_wer > wer) and main_proc:
print("Found better validated model, saving to %s" % args.model_path)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, loss_results=loss_results,
wer_results=wer_results, cer_results=cer_results), args.model_path)
best_wer = wer
avg_loss = 0
if not args.no_shuffle:
print("Shuffling batches...")
train_sampler.shuffle(epoch)
def main():
args = parser.parse_args()
torch.manual_seed(args.seed)
torch.cuda.manual_seed_all(args.seed)
args.checks_per_epoch = max(1,args.checks_per_epoch)
if params.rnn_type == 'gru' and params.rnn_act_type != 'tanh':
print("ERROR: GRU does not currently support activations other than tanh")
sys.exit()
if params.rnn_type == 'rnn' and params.rnn_act_type != 'relu':
print("ERROR: We should be using ReLU RNNs")
sys.exit()
print("=======================================================")
for arg in vars(args):
print("***%s = %s " % (arg.ljust(25), getattr(args, arg)))
print("=======================================================")
save_folder = args.save_folder
loss_results, cer_results, wer_results = torch.Tensor(params.epochs), torch.Tensor(params.epochs), torch.Tensor(params.epochs)
best_wer = None
try:
os.makedirs(save_folder)
except OSError as e:
if e.errno == errno.EEXIST:
print('Directory already exists.')
else:
raise
criterion = CTCLoss()
with open(params.labels_path) as label_file:
labels = str(''.join(json.load(label_file)))
audio_conf = dict(sample_rate=params.sample_rate,
window_size=params.window_size,
window_stride=params.window_stride,
window=params.window,
noise_dir=params.noise_dir,
noise_prob=params.noise_prob,
noise_levels=(params.noise_min, params.noise_max))
val_batch_size = min(8,params.batch_size_val)
print("Using bs={} for validation. Parameter found was {}".format(val_batch_size,params.batch_size_val))
train_dataset = SpectrogramDataset(audio_conf=audio_conf, manifest_filepath=params.train_manifest, labels=labels,
normalize=True, augment=params.augment)
test_dataset = SpectrogramDataset(audio_conf=audio_conf, manifest_filepath=params.val_manifest, labels=labels,
normalize=True, augment=False)
train_loader = AudioDataLoader(train_dataset, batch_size=params.batch_size,
num_workers=1)
test_loader = AudioDataLoader(test_dataset, batch_size=val_batch_size,
num_workers=1)
rnn_type = params.rnn_type.lower()
assert rnn_type in supported_rnns, "rnn_type should be either lstm, rnn or gru"
model = DeepSpeech(rnn_hidden_size = params.hidden_size,
nb_layers = params.hidden_layers,
labels = labels,
rnn_type = supported_rnns[rnn_type],
audio_conf = audio_conf,
bidirectional = False,
rnn_activation = params.rnn_act_type,
bias = params.bias)
parameters = model.parameters()
optimizer = torch.optim.SGD(parameters, lr=params.lr,
momentum=params.momentum, nesterov=True,
weight_decay = params.l2)
decoder = GreedyDecoder(labels)
if args.continue_from:
print("Loading checkpoint model %s" % args.continue_from)
package = torch.load(args.continue_from)
model.load_state_dict(package['state_dict'])
model = model.cuda()
optimizer.load_state_dict(package['optim_dict'])
start_epoch = int(package.get('epoch', 1)) - 1 # Python index start at 0 for training
start_iter = package.get('iteration', None)
if start_iter is None:
start_epoch += 1 # Assume that we saved a model after an epoch finished, so start at the next epoch.
start_iter = 0
else:
start_iter += 1
avg_loss = int(package.get('avg_loss', 0))
if args.start_epoch != -1:
start_epoch = args.start_epoch
loss_results[:start_epoch], cer_results[:start_epoch], wer_results[:start_epoch] = package['loss_results'][:start_epoch], package[ 'cer_results'][:start_epoch], package['wer_results'][:start_epoch]
print(loss_results)
epoch = start_epoch
else:
avg_loss = 0
start_epoch = 0
start_iter = 0
avg_training_loss = 0
if params.cuda:
model = torch.nn.DataParallel(model).cuda()
# model = torch.nn.parallel.DistributedDataParallel(model).cuda()
print(model)
print("Number of parameters: %d" % DeepSpeech.get_param_size(model))
batch_time = AverageMeter()
data_time = AverageMeter()
losses = AverageMeter()
ctc_time = AverageMeter()
for epoch in range(start_epoch, params.epochs):
model.train()
end = time.time()
for i, (data) in enumerate(train_loader, start=start_iter):
if i == len(train_loader):
break
inputs, targets, input_percentages, target_sizes = data
# measure data loading time
data_time.update(time.time() - end)
inputs = Variable(inputs, requires_grad=False)
target_sizes = Variable(target_sizes, requires_grad=False)
targets = Variable(targets, requires_grad=False)
if params.cuda:
inputs = inputs.cuda()
out = model(inputs)
out = out.transpose(0, 1) # TxNxH
seq_length = out.size(0)
sizes = Variable(input_percentages.mul_(int(seq_length)).int(), requires_grad=False)
ctc_start_time = time.time()
loss = criterion(out, targets, sizes, target_sizes)
ctc_time.update(time.time() - ctc_start_time)
loss = loss / inputs.size(0) # average the loss by minibatch
loss_sum = loss.data.sum()
inf = float("inf")
if loss_sum == inf or loss_sum == -inf:
print("WARNING: received an inf loss, setting loss value to 0")
loss_value = 0
else:
loss_value = loss.data[0]
avg_loss += loss_value
losses.update(loss_value, inputs.size(0))
# compute gradient
# print(torch.cuda.memory_allocated())
optimizer.zero_grad()
loss.backward()
torch.nn.utils.clip_grad_norm(model.parameters(), params.max_norm)
# SGD step
optimizer.step()
if params.cuda:
torch.cuda.synchronize()
# measure elapsed time
batch_time.update(time.time() - end)
end = time.time()
print('Epoch: [{0}][{1}/{2}]\t'
'Time {batch_time.val:.3f} ({batch_time.avg:.3f})\t'
'Data {data_time.val:.3f} ({data_time.avg:.3f})\t'
'CTC Time {ctc_time.val:.3f} ({ctc_time.avg:.3f})\t'
'Loss {loss.val:.4f} ({loss.avg:.4f})\t'.format(
(epoch + 1), (i + 1), len(train_loader), batch_time=batch_time,
data_time=data_time, ctc_time=ctc_time, loss=losses))
# del loss
# del out
if (i+1) % int((len(train_loader)/args.checks_per_epoch)) == 0:
print('Training Summary Epoch: [{0}]\t'
'Average Loss {loss:.3f}\t'
.format(epoch + 1, loss=avg_loss/5000, ))
start_iter = 0 # Reset start iteration for next epoch
total_cer, total_wer = 0, 0
if args.checkpoint:
file_path = '%s/deepspeech_%d_temp.pth.tar' % (save_folder, epoch + 1)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, loss_results=loss_results,
wer_results=999, cer_results=999),
file_path)
do_save = True
try:
model.eval()
wer, cer = eval_model(model, test_loader, decoder)
except RuntimeError as e:
print("skipping eval model checkpoint.... ")
do_save = False
loss_results[epoch] = avg_loss
wer_results[epoch] = wer
cer_results[epoch] = cer
print('Validation Summary Epoch: [{0}]\t'
'Average WER {wer:.3f}\t'
'Average CER {cer:.3f}\t'.format(
epoch + 1, wer=wer, cer=cer))
if args.checkpoint and do_save:
file_path = '%s/deepspeech_%d.pth.tar' % (save_folder, epoch + 1)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, loss_results=loss_results,
wer_results=wer_results, cer_results=cer_results),
file_path)
# anneal lr
optim_state = optimizer.state_dict()
optim_state['param_groups'][0]['lr'] = optim_state['param_groups'][0]['lr'] / params.learning_anneal
optimizer.load_state_dict(optim_state)
print('Learning rate annealed to: {lr:.6f}'.format(lr=optim_state['param_groups'][0]['lr']))
if best_wer is None or best_wer > wer:
print("Found better validated model, saving to %s" % args.model_path)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, loss_results=loss_results,
wer_results=wer_results, cer_results=cer_results)
, args.model_path)
best_wer = wer
model.train()
del loss
del out
avg_loss /= len(train_loader)
print('Training Summary Epoch: [{0}]\t'
'Average Loss {loss:.3f}\t'
.format( epoch + 1, loss=avg_loss, ))
start_iter = 0 # Reset start iteration for next epoch
total_cer, total_wer = 0, 0
model.eval()
wer, cer = eval_model( model, test_loader, decoder)
loss_results[epoch] = avg_loss
wer_results[epoch] = wer
cer_results[epoch] = cer
print('Validation Summary Epoch: [{0}]\t'
'Average WER {wer:.3f}\t'
'Average CER {cer:.3f}\t'.format(
epoch + 1, wer=wer, cer=cer))
if args.checkpoint:
file_path = '%s/deepspeech_%d.pth.tar' % (save_folder, epoch + 1)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, loss_results=loss_results,
wer_results=wer_results, cer_results=cer_results),
file_path)
# anneal lr
optim_state = optimizer.state_dict()
optim_state['param_groups'][0]['lr'] = optim_state['param_groups'][0]['lr'] / params.learning_anneal
optimizer.load_state_dict(optim_state)
print('Learning rate annealed to: {lr:.6f}'.format(lr=optim_state['param_groups'][0]['lr']))
if best_wer is None or best_wer > wer:
print("Found better validated model, saving to %s" % args.model_path)
torch.save(DeepSpeech.serialize(model, optimizer=optimizer, epoch=epoch, loss_results=loss_results,
wer_results=wer_results, cer_results=cer_results)
, args.model_path)
best_wer = wer
avg_loss = 0
model.train()
#If set to exit at a given accuracy, exit
if params.exit_at_acc and (best_wer <= args.acc):
break
print("=======================================================")
print("***Best WER = ", best_wer)
for arg in vars(args):
print("***%s = %s " % (arg.ljust(25), getattr(args, arg)))
print("=======================================================")
def main():
args = parser.parse_args()
torch.manual_seed(args.seed)
torch.cuda.manual_seed_all(args.seed)
if params.rnn_type == 'gru' and params.rnn_act_type != 'tanh':
print("ERROR: GRU does not currently support activations other than tanh")
sys.exit()
if params.rnn_type == 'rnn' and params.rnn_act_type != 'relu':
print("ERROR: We should be using ReLU RNNs")
sys.exit()
print("=======================================================")
for arg in vars(args):
print("***%s = %s " % (arg.ljust(25), getattr(args, arg)))
print("=======================================================")
save_folder = args.save_folder
loss_results, cer_results, wer_results = torch.Tensor(params.epochs), torch.Tensor(params.epochs), torch.Tensor(params.epochs)
best_wer = None
try:
os.makedirs(save_folder)
except OSError as e:
if e.errno == errno.EEXIST:
print('Directory already exists.')
else:
raise
with open(params.labels_path) as label_file:
labels = str(''.join(json.load(label_file)))
rnn_type = params.rnn_type.lower()
assert rnn_type in supported_rnns, "rnn_type should be either lstm, rnn or gru"
model = DeepSpeech(rnn_hidden_size = params.hidden_size,
nb_layers = params.hidden_layers,
labels = labels,
rnn_type = supported_rnns[rnn_type],
audio_conf = None,
bidirectional = True,
rnn_activation = params.rnn_act_type,
bias = params.bias)
parameters = model.parameters()
optimizer = torch.optim.SGD(parameters, lr=params.lr,
momentum=params.momentum, nesterov=False,
weight_decay = params.l2)
cuda = torch.device('cuda')
criterion = torch.nn.CTCLoss(reduction='none').to(cuda)
avg_loss = 0
start_epoch = 0
start_iter = 0
avg_training_loss = 0
if params.cuda:
model.cuda()
print(model)
print("Number of parameters: %d" % DeepSpeech.get_param_size(model))
batch_time = AverageMeter()
data_time = AverageMeter()
losses = AverageMeter()
ctc_time = AverageMeter()
forward_time = AverageMeter()
backward_time = AverageMeter()
filename = "/scratch-ml00/wang603/deepspeechData/deepspeech_train.pickle"
batchedData = user_defined_input.Batch(filename)
def train_one_epoch(epoch):
avg_loss = 0
for i in range(batchedData.numBatches):
# if i == 1: return
end = time.time()
inputs, targets, input_percentages, target_sizes = batchedData.batch(last=False)
# making all inputs Tensor
inputs = torch.from_numpy(inputs)
targets = torch.from_numpy(targets)
input_percentages = torch.from_numpy(input_percentages)
target_sizes = torch.from_numpy(target_sizes)
# measure data loading time
data_time.update(time.time() - end)
inputs = Variable(inputs, requires_grad=False)
target_sizes = Variable(target_sizes, requires_grad=False)
targets = Variable(targets, requires_grad=False)
if params.cuda:
inputs = inputs.cuda()
# measure forward pass time
forward_start_time = time.time()
out = model(inputs)
# out = out.transpose(0, 1) # TxNxH
seq_length = out.size(0)
sizes = Variable(input_percentages.mul_(int(seq_length)).int(), requires_grad=False)
# measure ctc loss computing time
ctc_start_time = time.time()
out = out.log_softmax(2) #.detach().requires_grad_()
# print(sizes.shape)
# print(out.shape)
loss = criterion(out, targets, sizes, target_sizes)
ctc_time.update(time.time() - ctc_start_time)
loss = loss / inputs.size(0) # average the loss by minibatch
loss_sum = loss.sum()
inf = float("inf")
if loss_sum == inf or loss_sum == -inf:
print("WARNING: received an inf loss, setting loss value to 0")
loss_value = 0
else:
loss_value = loss_sum.data.item()
avg_loss += loss_value
losses.update(loss_value, inputs.size(0))
forward_time.update(time.time() - forward_start_time)
# measure backward pass time
backward_start_time = time.time()
# compute gradient
optimizer.zero_grad()
loss_sum.backward()
torch.nn.utils.clip_grad_norm(model.parameters(), params.max_norm)
# SGD step
optimizer.step()
if params.cuda:
torch.cuda.synchronize()
backward_time.update(time.time() - backward_start_time)
# measure elapsed time
batch_time.update(time.time() - end)
if (i % 20 == 0):
print('Epoch: [{0}][{1}/{2}]\t'
'Time {batch_time.val:.3f} ({batch_time.avg:.3f})\t'
'Data {data_time.val:.3f} ({data_time.avg:.3f})\t'
'Forward {forward_time.val:.3f} ({forward_time.avg:.3f})\t'
'CTC Time {ctc_time.val:.3f} ({ctc_time.avg:.3f})\t'
'Backward {backward_time.val:.3f} ({backward_time.avg:.3f})\t'
'Loss {loss.val:.4f} ({loss.avg:.4f})\t'.format(
(epoch + 1), (i + 1), batchedData.numBatches, batch_time=batch_time,
data_time=data_time, forward_time=forward_time, ctc_time=ctc_time,
backward_time=backward_time, loss=losses))
del loss
del out
avg_loss /= batchedData.numBatches # len(train_loader)
print('Training Summary Epoch: [{0}]\t'
'Average Loss {loss:.3f}\t'
.format(epoch + 1, loss=avg_loss, ))
return avg_loss
model.train()
loss_save = []
time_save = []
for epoch in range(start_epoch, args.epochs):
startTime = time.time()
loss_save.append(train_one_epoch(epoch))
endTime = time.time()
time_save.append(endTime - startTime)
print("epoch {} used {} seconds".format(epoch, endTime - startTime))
time_save.sort()
median_time = time_save[int(args.epochs / 2)]
with open(args.write_to, "w") as f:
f.write("unit: " + "1 epoch\n")
for loss in loss_save:
f.write("{}\n".format(loss))
f.write("run time: " + str(0.0) + " " + str(median_time) + "\n")
if not args.distributed:
train_sampler = BucketingSampler(train_dataset, batch_size=args.batch_size)
else:
train_sampler = DistributedBucketingSampler(train_dataset, batch_size=args.batch_size,
num_replicas=args.world_size, rank=args.rank)
train_loader = AudioDataLoader(train_dataset,
num_workers=args.num_workers, batch_sampler=train_sampler)
test_loader = AudioDataLoader(test_dataset, batch_size=args.batch_size,
num_workers=args.num_workers)
if (not args.no_shuffle and start_epoch != 0) or args.no_sorta_grad:
print("Shuffling batches for the following epochs")
train_sampler.shuffle(start_epoch)
if args.cuda:
model.cuda()
if args.distributed:
model = torch.nn.parallel.DistributedDataParallel(model,
device_ids=(int(args.gpu_rank),) if args.rank else None)
print(model)
print("Number of parameters: %d" % DeepSpeech.get_param_size(model))
batch_time = AverageMeter()
data_time = AverageMeter()
losses = AverageMeter()
for epoch in range(start_epoch, args.epochs):
model.train()
end = time.time()
start_epoch_time = time.time()