def __init__(self, args, tgt_dict=None):
self.apply_mask = args.apply_mask
arg_overrides = {
"dropout": args.dropout,
"activation_dropout": args.activation_dropout,
"dropout_input": args.dropout_input,
"attention_dropout": args.attention_dropout,
"mask_length": args.mask_length,
"mask_prob": args.mask_prob,
"mask_selection": args.mask_selection,
"mask_other": args.mask_other,
"no_mask_overlap": args.no_mask_overlap,
"mask_channel_length": args.mask_channel_length,
"mask_channel_prob": args.mask_channel_prob,
"mask_channel_selection": args.mask_channel_selection,
"mask_channel_other": args.mask_channel_other,
"no_mask_channel_overlap": args.no_mask_channel_overlap,
"encoder_layerdrop": args.layerdrop,
"feature_grad_mult": args.feature_grad_mult,
}
if getattr(args, "w2v_args", None) is None:
args.w2v_path = '../libri/wav2vec2_small.pt'
print('load Wav2VecEncoder from {}'.format(args.w2v_path))
state = checkpoint_utils.load_checkpoint_to_cpu(
args.w2v_path, arg_overrides)
w2v_args = state["args"]
assert getattr(
w2v_args, "w2v_path", None
) is None # w2v_path is the pretrain model which should not have w2v_path
else:
state = None
w2v_args = args.w2v_args
assert args.normalize == w2v_args.normalize, 'Fine-tuning works best when data normalization is the same'
w2v_args.data = args.data
task = tasks.setup_task(w2v_args)
model = task.build_model(w2v_args)
if state is not None and not args.no_pretrained_weights:
print('restore Wav2VecEncoder from {}'.format(args.w2v_path))
model.load_state_dict(state["model"], strict=True)
model.remove_pretraining_modules()
super().__init__(task.source_dictionary)
d = w2v_args.encoder_embed_dim
self.d = d
self.w2v_model = model
self.final_dropout = nn.Dropout(args.final_dropout)
self.freeze_finetune_updates = args.freeze_finetune_updates
self.num_updates = 0
if tgt_dict is not None:
self.proj = Linear(d, len(tgt_dict))
else:
self.proj = None
def load_models_and_criterions(filenames,
data_path,
arg_overrides=None,
task=None,
model_state=None):
models = []
criterions = []
if arg_overrides is None:
arg_overrides = {}
arg_overrides['wer_args'] = None
arg_overrides['data'] = data_path
if filenames is None:
assert model_state is not None
filenames = [0]
else:
filenames = filenames.split(":")
for filename in filenames:
if model_state is None:
if not os.path.exists(filename):
raise IOError("Model file not found: {}".format(filename))
state = checkpoint_utils.load_checkpoint_to_cpu(
filename, arg_overrides)
else:
state = model_state
args = state["args"]
if task is None:
task = tasks.setup_task(args)
model = task.build_model(args)
print('model restore state from {}'.format(filename))
model.load_state_dict(state["model"], strict=True)
models.append(model)
criterion = task.build_criterion(args)
if "criterion" in state:
criterion.load_state_dict(state["criterion"], strict=True)
criterions.append(criterion)
return models, criterions, args
def load_model_ensemble_and_task(filenames,
arg_overrides=None,
task=None,
strict=True,
suffix=''):
import tasks
ensemble = []
for filename in filenames:
filename = filename.replace(".pt", suffix + ".pt")
if not PathManager.exists(filename):
raise IOError("Model file not found: {}".format(filename))
state = load_checkpoint_to_cpu(filename, arg_overrides)
args = state["args"]
if task is None:
task = tasks.setup_task(args)
# build model for ensemble
model = task.build_model(args)
model.load_state_dict(state["model"], strict=strict, args=args)
ensemble.append(model)
return ensemble, args, task
def _main(args, output_file):
logging.basicConfig(
format='%(asctime)s | %(levelname)s | %(name)s | %(message)s',
datefmt='%Y-%m-%d %H:%M:%S',
level=logging.INFO,
stream=output_file,
)
logger = logging.getLogger('generate')
utils.import_user_module(args)
if args.max_tokens is None and args.max_sentences is None:
args.max_tokens = 12000
logger.info(args)
# Fix seed for stochastic decoding
if args.seed is not None and not args.no_seed_provided:
np.random.seed(args.seed)
utils.set_torch_seed(args.seed)
use_cuda = torch.cuda.is_available() and not args.cpu
# Load dataset splits
task = tasks.setup_task(args)
task.load_dataset(args.gen_subset)
# Set dictionaries
try:
src_dict = getattr(task, 'source_dictionary', None)
except NotImplementedError:
src_dict = None
tgt_dict = task.target_dictionary
# Load ensemble
logger.info('loading model(s) from {}'.format(args.path))
models, _model_args = checkpoint_utils.load_model_ensemble(
utils.split_paths(args.path),
arg_overrides=eval(args.model_overrides),
task=task,
suffix=getattr(args, "checkpoint_suffix", ""),
)
# Optimize ensemble for generation
for model in models:
model.prepare_for_inference_(args)
if args.fp16:
model.half()
if use_cuda:
model.cuda()
# Load alignment dictionary for unknown word replacement
# (None if no unknown word replacement, empty if no path to align dictionary)
align_dict = utils.load_align_dict(args.replace_unk)
# Load dataset (possibly sharded)
itr = task.get_batch_iterator(
dataset=task.dataset(args.gen_subset),
max_tokens=args.max_tokens,
max_sentences=args.max_sentences,
max_positions=utils.resolve_max_positions(
task.max_positions(),
*[model.max_positions() for model in models]
),
ignore_invalid_inputs=args.skip_invalid_size_inputs_valid_test,
required_batch_size_multiple=args.required_batch_size_multiple,
num_shards=args.num_shards,
shard_id=args.shard_id,
num_workers=args.num_workers,
).next_epoch_itr(shuffle=False)
progress = progress_bar.progress_bar(
itr,
log_format=args.log_format,
log_interval=args.log_interval,
default_log_format=('tqdm' if not args.no_progress_bar else 'none'),
)
# Initialize generator
gen_timer = StopwatchMeter()
generator = task.build_generator(models, args)
# Handle tokenization and BPE
tokenizer = encoders.build_tokenizer(args)
bpe = encoders.build_bpe(args)
def decode_fn(x):
if bpe is not None:
x = bpe.decode(x)
if tokenizer is not None:
x = tokenizer.decode(x)
return x
scorer = scoring.build_scorer(args, tgt_dict)
num_sentences = 0
has_target = True
wps_meter = TimeMeter()
for sample in progress:
sample = utils.move_to_cuda(sample) if use_cuda else sample
if 'net_input' not in sample:
continue
prefix_tokens = None
if args.prefix_size > 0:
prefix_tokens = sample['target'][:, :args.prefix_size]
constraints = None
if "constraints" in sample:
constraints = sample["constraints"]
gen_timer.start()
hypos = task.inference_step(generator, models, sample, prefix_tokens=prefix_tokens, constraints=constraints)
num_generated_tokens = sum(len(h[0]['tokens']) for h in hypos)
gen_timer.stop(num_generated_tokens)
for i, sample_id in enumerate(sample['id'].tolist()):
has_target = sample['target'] is not None
# Remove padding
if 'src_tokens' in sample['net_input']:
src_tokens = utils.strip_pad(sample['net_input']['src_tokens'][i, :], tgt_dict.pad())
else:
src_tokens = None
target_tokens = None
if has_target:
target_tokens = utils.strip_pad(sample['target'][i, :], tgt_dict.pad()).int().cpu()
# Either retrieve the original sentences or regenerate them from tokens.
if align_dict is not None:
src_str = task.dataset(args.gen_subset).src.get_original_text(sample_id)
target_str = task.dataset(args.gen_subset).tgt.get_original_text(sample_id)
else:
if src_dict is not None:
src_str = src_dict.string(src_tokens, args.remove_bpe)
else:
src_str = ""
if has_target:
target_str = tgt_dict.string(
target_tokens,
args.remove_bpe,
escape_unk=True,
extra_symbols_to_ignore=get_symbols_to_strip_from_output(generator),
)
src_str = decode_fn(src_str)
if has_target:
target_str = decode_fn(target_str)
if not args.quiet:
if src_dict is not None:
print('S-{}\t{}'.format(sample_id, src_str), file=output_file)
if has_target:
print('T-{}\t{}'.format(sample_id, target_str), file=output_file)
# Process top predictions
for j, hypo in enumerate(hypos[i][:args.nbest]):
hypo_tokens, hypo_str, alignment = utils.post_process_prediction(
hypo_tokens=hypo['tokens'].int().cpu(),
src_str=src_str,
alignment=hypo['alignment'],
align_dict=align_dict,
tgt_dict=tgt_dict,
remove_bpe=args.remove_bpe,
extra_symbols_to_ignore=get_symbols_to_strip_from_output(generator),
)
detok_hypo_str = decode_fn(hypo_str)
if not args.quiet:
score = hypo['score'] / math.log(2) # convert to base 2
# original hypothesis (after tokenization and BPE)
print('H-{}\t{}\t{}'.format(sample_id, score, hypo_str), file=output_file)
# detokenized hypothesis
print('D-{}\t{}\t{}'.format(sample_id, score, detok_hypo_str), file=output_file)
print('P-{}\t{}'.format(
sample_id,
' '.join(map(
lambda x: '{:.4f}'.format(x),
# convert from base e to base 2
hypo['positional_scores'].div_(math.log(2)).tolist(),
))
), file=output_file)
if args.print_alignment:
print('A-{}\t{}'.format(
sample_id,
' '.join(['{}-{}'.format(src_idx, tgt_idx) for src_idx, tgt_idx in alignment])
), file=output_file)
if args.print_step:
print('I-{}\t{}'.format(sample_id, hypo['steps']), file=output_file)
if getattr(args, 'retain_iter_history', False):
for step, h in enumerate(hypo['history']):
_, h_str, _ = utils.post_process_prediction(
hypo_tokens=h['tokens'].int().cpu(),
src_str=src_str,
alignment=None,
align_dict=None,
tgt_dict=tgt_dict,
remove_bpe=None,
)
print('E-{}_{}\t{}'.format(sample_id, step, h_str), file=output_file)
# Score only the top hypothesis
if has_target and j == 0:
if align_dict is not None or args.remove_bpe is not None:
# Convert back to tokens for evaluation with unk replacement and/or without BPE
target_tokens = tgt_dict.encode_line(target_str, add_if_not_exist=True)
hypo_tokens = tgt_dict.encode_line(detok_hypo_str, add_if_not_exist=True)
if hasattr(scorer, 'add_string'):
scorer.add_string(target_str, detok_hypo_str)
else:
scorer.add(target_tokens, hypo_tokens)
wps_meter.update(num_generated_tokens)
progress.log({'wps': round(wps_meter.avg)})
num_sentences += sample["nsentences"] if "nsentences" in sample else sample['id'].numel()
logger.info('NOTE: hypothesis and token scores are output in base 2')
logger.info('Translated {} sentences ({} tokens) in {:.1f}s ({:.2f} sentences/s, {:.2f} tokens/s)'.format(
num_sentences, gen_timer.n, gen_timer.sum, num_sentences / gen_timer.sum, 1. / gen_timer.avg))
if has_target:
if args.bpe and not args.sacrebleu:
if args.remove_bpe:
logger.warning("BLEU score is being computed by splitting detokenized string on spaces, this is probably not what you want. Use --sacrebleu for standard 13a BLEU tokenization")
else:
logger.warning("If you are using BPE on the target side, the BLEU score is computed on BPE tokens, not on proper words. Use --sacrebleu for standard 13a BLEU tokenization")
# use print to be consistent with other main outputs: S-, H-, T-, D- and so on
print(
'Generate {} with beam={}: {}'.format(args.gen_subset, args.beam, scorer.result_string()),
file=output_file)
return scorer
def main(args, task=None, model_state=None):
check_args(args)
if args.max_tokens is None and args.max_sentences is None:
args.max_tokens = 4000000
logger.info(args)
use_cuda = torch.cuda.is_available() and not args.cpu
if task is None:
# Load dataset splits
task = tasks.setup_task(args)
task.load_dataset(args.gen_subset)
logger.info("| {} {} {} examples".format(
args.data, args.gen_subset, len(task.dataset(args.gen_subset))))
label_path = os.path.join(args.data, "{}.word".format(args.gen_subset))
labels = []
with open(label_path, "r") as f:
for line in f:
labels.append(line)
# Set dictionary
tgt_dict = task.target_dictionary
logger.info("| decoding with criterion {}".format(args.criterion))
# Load ensemble
if args.load_emissions:
models, criterions = [], []
else:
logger.info("| loading model(s) from {}".format(args.path))
models, criterions, _ = load_models_and_criterions(
args.path,
data_path=args.data,
arg_overrides=eval(args.model_overrides), # noqa
task=task,
model_state=model_state,
)
optimize_models(args, use_cuda, models)
# hack to pass transitions to W2lDecoder
if args.criterion == "asg_loss":
trans = criterions[0].asg.trans.data
args.asg_transitions = torch.flatten(trans).tolist()
# Load dataset (possibly sharded)
itr = get_dataset_itr(args, task, models)
# Initialize generator
gen_timer = StopwatchMeter()
def build_generator(args):
w2l_decoder = getattr(args, "w2l_decoder", None)
if w2l_decoder == "viterbi":
from speech_recognition.w2l_decoder import W2lViterbiDecoder
return W2lViterbiDecoder(args, task.target_dictionary)
elif w2l_decoder == "kenlm":
from speech_recognition.w2l_decoder import W2lKenLMDecoder
return W2lKenLMDecoder(args, task.target_dictionary)
elif w2l_decoder == "fairseqlm":
from speech_recognition.w2l_decoder import W2lFairseqLMDecoder
return W2lFairseqLMDecoder(args, task.target_dictionary)
elif w2l_decoder == "ctc_decoder":
from speech_recognition.ctc_decoder import CTCDecoder
return CTCDecoder(args, task.target_dictionary)
else:
return super().build_generator(args)
generator = build_generator(args)
if args.load_emissions:
generator = ExistingEmissionsDecoder(
generator, np.load(args.load_emissions, allow_pickle=True))
logger.info("loaded emissions from " + args.load_emissions)
num_sentences = 0
if args.results_path is not None and not os.path.exists(args.results_path):
os.makedirs(args.results_path)
max_source_pos = (utils.resolve_max_positions(
task.max_positions(), *[model.max_positions() for model in models]), )
if max_source_pos is not None:
max_source_pos = max_source_pos[0]
if max_source_pos is not None:
max_source_pos = max_source_pos[0] - 1
if args.dump_emissions:
emissions = {}
if args.dump_features:
features = {}
models[0].bert.proj = None
else:
res_files = prepare_result_files(args)
errs_t = 0
lengths_t = 0
with progress_bar.build_progress_bar(args, itr) as t:
wps_meter = TimeMeter()
for sample in t:
sample = utils.move_to_cuda(sample) if use_cuda else sample
if "net_input" not in sample:
continue
prefix_tokens = None
if args.prefix_size > 0:
prefix_tokens = sample["target"][:, :args.prefix_size]
gen_timer.start()
if args.dump_emissions:
with torch.no_grad():
encoder_out = models[0](**sample["net_input"])
emm = models[0].get_normalized_probs(encoder_out,
log_probs=True)
emm = emm.transpose(0, 1).cpu().numpy()
for i, id in enumerate(sample["id"]):
emissions[id.item()] = emm[i]
continue
elif args.dump_features:
with torch.no_grad():
encoder_out = models[0](**sample["net_input"])
feat = encoder_out["encoder_out"].transpose(
0, 1).cpu().numpy()
for i, id in enumerate(sample["id"]):
padding = encoder_out["encoder_padding_mask"][i].cpu().numpy() \
if encoder_out["encoder_padding_mask"] is not None else None
features[id.item()] = (feat[i], padding)
continue
hypos = task.inference_step(generator, models, sample,
prefix_tokens)
tokens_len = 0
for h in hypos:
try:
h_len = len(h[0]["tokens"])
tokens_len += h_len
except Exception as ex:
print(ex)
num_generated_tokens = sum(len(h[0]["tokens"]) for h in hypos)
gen_timer.stop(num_generated_tokens)
for i, sample_id in enumerate(sample["id"].tolist()):
speaker = None
# id = task.dataset(args.gen_subset).ids[int(sample_id)]
id = sample_id
toks = sample["target"][
i, :] if 'target_label' not in sample else sample[
"target_label"][i, :]
target_tokens = (utils.strip_pad(toks,
tgt_dict.pad()).int().cpu())
# Process top predictions
errs, length = process_predictions(args, hypos[i], None,
tgt_dict, target_tokens,
res_files, speaker, id,
labels)
errs_t += errs
lengths_t += length
wps_meter.update(num_generated_tokens)
t.log({"wps": round(wps_meter.avg)})
num_sentences += sample[
"nsentences"] if "nsentences" in sample else sample[
"id"].numel()
wer = None
if args.dump_emissions:
emm_arr = []
for i in range(len(emissions)):
emm_arr.append(emissions[i])
np.save(args.dump_emissions, emm_arr)
logger.info(
f"saved {len(emissions)} emissions to {args.dump_emissions}")
elif args.dump_features:
feat_arr = []
for i in range(len(features)):
feat_arr.append(features[i])
np.save(args.dump_features, feat_arr)
logger.info(f"saved {len(features)} emissions to {args.dump_features}")
else:
if lengths_t > 0:
wer = errs_t * 100.0 / lengths_t
logger.info(f"WER: {wer}")
logger.info("| Processed {} sentences ({} tokens) in {:.1f}s ({:.2f}"
"sentences/s, {:.2f} tokens/s)".format(
num_sentences,
gen_timer.n,
gen_timer.sum,
num_sentences / gen_timer.sum,
1.0 / gen_timer.avg,
))
logger.info("| Generate {} with beam={}".format(
args.gen_subset, args.beam))
return task, wer
def main(args):
start_time = time.time()
total_translate_time = 0
utils.import_user_module(args)
if args.buffer_size < 1:
args.buffer_size = 1
if args.max_tokens is None and args.max_sentences is None:
args.max_sentences = 1
assert not args.sampling or args.nbest == args.beam, \
'--sampling requires --nbest to be equal to --beam'
assert not args.max_sentences or args.max_sentences <= args.buffer_size, \
'--max-sentences/--batch-size cannot be larger than --buffer-size'
logger.info(args)
# Fix seed for stochastic decoding
if args.seed is not None and not args.no_seed_provided:
np.random.seed(args.seed)
utils.set_torch_seed(args.seed)
use_cuda = torch.cuda.is_available() and not args.cpu
# Setup task, e.g., translation
task = tasks.setup_task(args)
# Load ensemble
logger.info('loading model(s) from {}'.format(args.path))
models, _model_args = checkpoint_utils.load_model_ensemble(
args.path.split(os.pathsep),
arg_overrides=eval(args.model_overrides),
task=task,
suffix=getattr(args, "checkpoint_suffix", ""),
)
# Set dictionaries
src_dict = task.source_dictionary
tgt_dict = task.target_dictionary
# Optimize ensemble for generation
for model in models:
model.prepare_for_inference_(args)
if args.fp16:
model.half()
if use_cuda:
model.cuda()
# Initialize generator
generator = task.build_generator(models, args)
# Handle tokenization and BPE
tokenizer = encoders.build_tokenizer(args)
bpe = encoders.build_bpe(args)
def encode_fn(x):
if tokenizer is not None:
x = tokenizer.encode(x)
if bpe is not None:
x = bpe.encode(x)
return x
def decode_fn(x):
if bpe is not None:
x = bpe.decode(x)
if tokenizer is not None:
x = tokenizer.decode(x)
return x
# Load alignment dictionary for unknown word replacement
# (None if no unknown word replacement, empty if no path to align dictionary)
align_dict = utils.load_align_dict(args.replace_unk)
max_positions = utils.resolve_max_positions(
task.max_positions(), *[model.max_positions() for model in models])
if args.constraints:
logger.warning(
"NOTE: Constrained decoding currently assumes a shared subword vocabulary."
)
if args.buffer_size > 1:
logger.info('Sentence buffer size: %s', args.buffer_size)
logger.info('NOTE: hypothesis and token scores are output in base 2')
logger.info('Type the input sentence and press return:')
start_id = 0
for inputs in buffered_read(args.input, args.buffer_size):
results = []
for batch in make_batches(inputs, args, task, max_positions,
encode_fn):
bsz = batch.src_tokens.size(0)
src_tokens = batch.src_tokens
src_lengths = batch.src_lengths
constraints = batch.constraints
if use_cuda:
src_tokens = src_tokens.cuda()
src_lengths = src_lengths.cuda()
if constraints is not None:
constraints = constraints.cuda()
sample = {
'net_input': {
'src_tokens': src_tokens,
'src_lengths': src_lengths,
},
}
translate_start_time = time.time()
translations = task.inference_step(generator,
models,
sample,
constraints=constraints)
translate_time = time.time() - translate_start_time
total_translate_time += translate_time
list_constraints = [[] for _ in range(bsz)]
if args.constraints:
list_constraints = [unpack_constraints(c) for c in constraints]
for i, (id,
hypos) in enumerate(zip(batch.ids.tolist(), translations)):
src_tokens_i = utils.strip_pad(src_tokens[i], tgt_dict.pad())
constraints = list_constraints[i]
results.append((start_id + id, src_tokens_i, hypos, {
"constraints": constraints,
"time": translate_time / len(translations)
}))
# sort output to match input order
for id_, src_tokens, hypos, info in sorted(results,
key=lambda x: x[0]):
if src_dict is not None:
src_str = src_dict.string(src_tokens, args.remove_bpe)
print('S-{}\t{}'.format(id_, src_str))
print("W-{}\t{:.3f}\tseconds".format(id_, info["time"]))
for constraint in info["constraints"]:
print("C-{}\t{}".format(
id_, tgt_dict.string(constraint, args.remove_bpe)))
# Process top predictions
for hypo in hypos[:min(len(hypos), args.nbest)]:
hypo_tokens, hypo_str, alignment = utils.post_process_prediction(
hypo_tokens=hypo['tokens'].int().cpu(),
src_str=src_str,
alignment=hypo['alignment'],
align_dict=align_dict,
tgt_dict=tgt_dict,
remove_bpe=args.remove_bpe,
extra_symbols_to_ignore=get_symbols_to_strip_from_output(
generator),
)
detok_hypo_str = decode_fn(hypo_str)
score = hypo['score'] / math.log(2) # convert to base 2
# original hypothesis (after tokenization and BPE)
print('H-{}\t{}\t{}'.format(id_, score, hypo_str))
# detokenized hypothesis
print('D-{}\t{}\t{}'.format(id_, score, detok_hypo_str))
print('P-{}\t{}'.format(
id_,
' '.join(
map(
lambda x: '{:.4f}'.format(x),
# convert from base e to base 2
hypo['positional_scores'].div_(math.log(2)
).tolist(),
))))
if args.print_alignment:
alignment_str = " ".join(
["{}-{}".format(src, tgt) for src, tgt in alignment])
print('A-{}\t{}'.format(id_, alignment_str))
# update running id_ counter
start_id += len(inputs)
logger.info("Total time: {:.3f} seconds; translation time: {:.3f}".format(
time.time() - start_time, total_translate_time))
def main(parsed_args, **unused_kwargs):
assert parsed_args.path is not None, '--path required for evaluation!'
if torch.cuda.is_available() and not parsed_args.cpu:
torch.cuda.set_device(parsed_args.device_id)
utils.import_user_module(parsed_args)
logger.info(parsed_args)
use_cuda = torch.cuda.is_available() and not parsed_args.cpu
task = tasks.setup_task(parsed_args)
# Load ensemble
logger.info('loading model(s) from {}'.format(parsed_args.path))
models, args = checkpoint_utils.load_model_ensemble(
parsed_args.path.split(os.pathsep),
arg_overrides=eval(parsed_args.model_overrides),
task=task,
suffix=getattr(parsed_args, "checkpoint_suffix", ""),
)
for arg in vars(parsed_args).keys():
if arg not in {
'self_target', 'future_target', 'past_target', 'tokens_per_sample',
'output_size_dictionary', 'add_bos_token',
}:
setattr(args, arg, getattr(parsed_args, arg))
# reduce tokens per sample by the required context window size
args.tokens_per_sample -= args.context_window
task = tasks.setup_task(args)
# Load dataset splits
task.load_dataset(args.gen_subset)
dataset = task.dataset(args.gen_subset)
if args.context_window > 0:
dataset = LMContextWindowDataset(
dataset=dataset,
tokens_per_sample=args.tokens_per_sample,
context_window=args.context_window,
pad_idx=task.source_dictionary.pad(),
)
logger.info('{} {} {} examples'.format(args.data, args.gen_subset, len(dataset)))
# Optimize ensemble for generation and set the source and dest dicts on the model (required by scorer)
for model in models:
model.prepare_for_inference_(args)
if args.fp16:
model.half()
if use_cuda:
model.cuda()
assert len(models) > 0
logger.info('num. model params: {}'.format(sum(p.numel() for p in models[0].parameters())))
itr = task.get_batch_iterator(
dataset=dataset,
max_tokens=args.max_tokens or 36000,
max_sentences=args.max_sentences,
max_positions=utils.resolve_max_positions(*[
model.max_positions() for model in models
]),
ignore_invalid_inputs=True,
num_shards=args.num_shards,
shard_id=args.shard_id,
num_workers=args.num_workers,
).next_epoch_itr(shuffle=False)
progress = progress_bar.progress_bar(
itr,
log_format=args.log_format,
log_interval=args.log_interval,
default_log_format=('tqdm' if not args.no_progress_bar else 'none'),
)
gen_timer = StopwatchMeter()
scorer = SequenceScorer(task.target_dictionary, args.softmax_batch)
score_sum = 0.
count = 0
if args.remove_bpe is not None:
if args.remove_bpe == 'sentencepiece':
raise NotImplementedError
else:
bpe_cont = args.remove_bpe.rstrip()
bpe_toks = {
i
for i in range(len(task.source_dictionary))
if task.source_dictionary[i].endswith(bpe_cont)
}
bpe_len = len(bpe_cont)
else:
bpe_toks = None
bpe_len = 0
word_stats = dict()
wps_meter = TimeMeter()
for sample in progress:
if 'net_input' not in sample:
continue
sample = utils.move_to_cuda(sample) if use_cuda else sample
gen_timer.start()
hypos = scorer.generate(models, sample)
gen_timer.stop(sample['ntokens'])
for i, hypos_i in enumerate(hypos):
hypo = hypos_i[0]
sample_id = sample['id'][i]
tokens = hypo['tokens']
tgt_len = tokens.numel()
pos_scores = hypo['positional_scores'].float()
if getattr(args, 'add_bos_token', False):
assert hypo['tokens'][0].item() == task.target_dictionary.bos()
tokens = tokens[1:]
pos_scores = pos_scores[1:]
skipped_toks = 0
if bpe_toks is not None:
for i in range(tgt_len - 1):
if tokens[i].item() in bpe_toks:
skipped_toks += 1
pos_scores[i + 1] += pos_scores[i]
pos_scores[i] = 0
inf_scores = pos_scores.eq(float('inf')) | pos_scores.eq(float('-inf'))
if inf_scores.any():
logger.info(
'skipping tokens with inf scores:',
task.target_dictionary.string(tokens[inf_scores.nonzero()])
)
pos_scores = pos_scores[(~inf_scores).nonzero()]
score_sum += pos_scores.sum().cpu()
count += pos_scores.numel() - skipped_toks
if args.output_word_probs or args.output_word_stats:
w = ''
word_prob = []
is_bpe = False
for i in range(len(tokens)):
w_ind = tokens[i].item()
w += task.source_dictionary[w_ind]
if bpe_toks is not None and w_ind in bpe_toks:
w = w[:-bpe_len]
is_bpe = True
else:
word_prob.append((w, pos_scores[i].item()))
next_prob = None
ind = i + 1
while ind < len(tokens):
if pos_scores[ind].item() != 0:
next_prob = pos_scores[ind]
break
ind += 1
word_stats.setdefault(w, WordStat(w, is_bpe)).add(pos_scores[i].item(), next_prob)
is_bpe = False
w = ''
if args.output_word_probs:
logger.info(
str(int(sample_id)) + " "
+ ('\t'.join('{} [{:2f}]'.format(x[0], x[1]) for x in word_prob))
)
wps_meter.update(sample['ntokens'])
progress.log({'wps': round(wps_meter.avg)})
avg_nll_loss = -score_sum / count / math.log(2) # convert to base 2
logger.info('Evaluated {} tokens in {:.1f}s ({:.2f} tokens/s)'.format(
gen_timer.n, gen_timer.sum, 1. / gen_timer.avg
))
logger.info('Loss (base 2): {:.4f}, Perplexity: {:.2f}'.format(
avg_nll_loss, 2**avg_nll_loss
))
if args.output_word_stats:
for ws in sorted(word_stats.values(), key=lambda x: x.count, reverse=True):
logger.info(ws)
def __init__(self, args, tgt_dict):
super().__init__(args, tgt_dict)
self.silence = tgt_dict.bos()
self.unit_lm = getattr(args, "unit_lm", False)
self.lexicon = load_words(args.lexicon) if args.lexicon else None
self.idx_to_wrd = {}
checkpoint = torch.load(args.kenlm_model, map_location="cpu")
lm_args = checkpoint["args"]
lm_args.data = osp.dirname(args.kenlm_model)
print(lm_args)
task = tasks.setup_task(lm_args)
model = task.build_model(lm_args)
model.load_state_dict(checkpoint["model"], strict=False)
self.trie = Trie(self.vocab_size, self.silence)
self.word_dict = task.dictionary
self.unk_word = self.word_dict.unk()
self.lm = FairseqLM(self.word_dict, model)
self.decoder_opts = DecoderOptions(
args.beam,
int(getattr(args, "beam_size_token", len(tgt_dict))),
args.beam_threshold,
args.lm_weight,
args.word_score,
args.unk_weight,
args.sil_weight,
0,
False,
self.criterion_type,
)
if self.lexicon:
start_state = self.lm.start(False)
for i, (word, spellings) in enumerate(self.lexicon.items()):
if self.unit_lm:
word_idx = i
self.idx_to_wrd[i] = word
score = 0
else:
word_idx = self.word_dict.index(word)
_, score = self.lm.score(start_state, word_idx, no_cache=True)
for spelling in spellings:
spelling_idxs = [tgt_dict.index(token) for token in spelling]
assert (
tgt_dict.unk() not in spelling_idxs
), f"{spelling} {spelling_idxs}"
self.trie.insert(spelling_idxs, word_idx, score)
self.trie.smear(SmearingMode.MAX)
self.decoder = LexiconDecoder(
self.decoder_opts,
self.trie,
self.lm,
self.silence,
self.blank,
self.unk_word,
[],
self.unit_lm,
)
else:
self.decoder = LexiconFreeDecoder(
self.decoder_opts, self.lm, self.silence, self.blank, []
)
def main(args):
utils.import_user_module(args)
assert (
args.max_tokens is not None or args.max_sentences is not None
), "Must specify batch size either with --max-tokens or --max-sentences"
metrics.reset()
np.random.seed(args.seed)
utils.set_torch_seed(args.seed)
if distributed_utils.is_master(args):
checkpoint_utils.verify_checkpoint_directory(args.save_dir)
# Print args
logger.info(args)
# Setup task, e.g., translation, language modeling, etc.
task = tasks.setup_task(args)
# Load valid dataset (we load training data below, based on the latest checkpoint)
for valid_sub_split in args.valid_subset.split(","):
task.load_dataset(valid_sub_split, combine=False, epoch=1)
# Build model and criterion
model = task.build_model(args)
criterion = task.build_criterion(args)
logger.info(model)
logger.info("task: {} ({})".format(args.task, task.__class__.__name__))
logger.info("model: {} ({})".format(args.arch, model.__class__.__name__))
logger.info(
"criterion: {} ({})".format(args.criterion, criterion.__class__.__name__)
)
logger.info(
"num. model params: {} (num. trained: {})".format(
sum(p.numel() for p in model.parameters()),
sum(p.numel() for p in model.parameters() if p.requires_grad),
)
)
# (optionally) Configure quantization
if args.quantization_config_path is not None:
quantizer = quantization_utils.Quantizer(
config_path=args.quantization_config_path,
max_epoch=args.max_epoch,
max_update=args.max_update,
)
else:
quantizer = None
# Build trainer
if args.model_parallel_size == 1:
trainer = Trainer(args, task, model, criterion, quantizer)
else:
raise NotImplementedError('here')
logger.info(
"training on {} devices (GPUs/TPUs)".format(args.distributed_world_size)
)
logger.info(
"max tokens per GPU = {} and max sentences per GPU = {}".format(
args.max_tokens, args.max_sentences
)
)
# Load the latest checkpoint if one is available and restore the
# corresponding train iterator
extra_state, epoch_itr = checkpoint_utils.load_checkpoint(args, trainer)
# Train until the learning rate gets too small
max_epoch = args.max_epoch or math.inf
lr = trainer.get_lr()
train_meter = meters.StopwatchMeter()
train_meter.start()
while lr > args.min_lr and epoch_itr.next_epoch_idx <= max_epoch:
# train for one epoch
valid_losses, should_stop = train(args, trainer, task, epoch_itr)
if should_stop:
break
# only use first validation loss to update the learning rate
lr = trainer.lr_step(epoch_itr.epoch, valid_losses[0])
epoch_itr = trainer.get_train_iterator(
epoch_itr.next_epoch_idx,
# sharded data: get train iterator for next epoch
load_dataset=task.has_sharded_data("train"),
)
train_meter.stop()
logger.info("done training in {:.1f} seconds".format(train_meter.sum))
