def create_and_batch_tfds(self,
ds: Dataset,
mode,
args=None,
num_replicas_in_sync=1) -> tf.data.Dataset:
""" Creates a dataset according to the `mode`.
Args:
args: A dict containing dataset arguments.
ds: A neurst.data.datasets.Dataset object.
mode: A ModeKeys indicating the running mode.
num_replicas_in_sync: The number of GPUs or other workers. We will generate global
batches, and each global batch is equally divisible by number of replicas.
Returns:
A tf.data.Dataset.
"""
if args is None:
args = self._args
else:
args = deep_merge_dict(self._args, args, local_overwrite=False)
src_eos = tf.constant(self._src_data_pipeline.meta["eos_id"],
dtype=tf.int64)
trg_eos = tf.constant(self._trg_data_pipeline.meta["eos_id"],
dtype=tf.int64)
assert isinstance(ds, AbstractParallelDataset), (
"The dataset for SeqToSeq task must inherit AbstractParallelDataset."
)
dataset = ds.build(map_func=self.get_data_preprocess_fn(
mode, ds.status, args),
map_output_dtypes=self.inputs_signature(mode)[0],
auto_shard=(mode == compat.ModeKeys.TRAIN),
shuffle=(mode == compat.ModeKeys.TRAIN))
if mode == compat.ModeKeys.INFER:
logging.info("Creating test dataset.")
return dataset.cache().padded_batch(
dataset_utils.adjust_batch_size(
args["batch_size"],
num_replicas_in_sync=num_replicas_in_sync),
padded_shapes={"feature": [None]},
padding_values={"feature": src_eos},
drop_remainder=False)
elif mode == compat.ModeKeys.EVAL:
logging.info("Creating evaluation dataset.")
return dataset.cache().padded_batch(
dataset_utils.adjust_batch_size(
args["batch_size"],
num_replicas_in_sync=num_replicas_in_sync),
padded_shapes={
"feature": [None],
"label": [None]
},
padding_values={
"feature": src_eos,
"label": trg_eos
},
drop_remainder=False)
else:
logging.info("Creating training dataset.")
dataset = dataset_utils.clean_dataset_by_length(
dataset, {
"feature": args["max_src_len"],
"label": args["max_trg_len"]
})
if args["cache_dataset"]:
dataset = dataset.cache()
if args["shuffle_buffer"]:
dataset = dataset.shuffle(buffer_size=args["shuffle_buffer"])
padding_values = {"feature": src_eos, "label": trg_eos}
if args["max_src_len"] is None:
raise RuntimeError("Must provide `max_src_len` for training.")
if args["max_trg_len"] is None:
raise RuntimeError("Must provide `max_trg_len` for training.")
src_bucket_boundaries, trg_bucket_boundaries = dataset_utils.associated_bucket_boundaries(
dataset_utils.create_batch_bucket_boundaries(
args["max_src_len"]),
dataset_utils.create_batch_bucket_boundaries(
args["max_trg_len"]))
bucket_boundaries = {
"feature": src_bucket_boundaries,
"label": trg_bucket_boundaries
}
bucket_batch_sizes = dataset_utils.adjust_batch_size(
args["batch_size"],
args["batch_size_per_gpu"],
bucket_boundaries=bucket_boundaries
if args["batch_by_tokens"] else None,
boundaries_reduce_to_length_fn=lambda x: max(tf.nest.flatten(x)
),
num_replicas_in_sync=num_replicas_in_sync)
return dataset_utils.batch_examples_by_token(
dataset,
bucket_boundaries=bucket_boundaries,
bucket_batch_sizes=bucket_batch_sizes,
padding_values=padding_values,
example_length_func=lambda x:
{k: tf.size(v)
for k, v in x.items()})
def create_and_batch_tfds(self, ds, mode, args=None, num_replicas_in_sync=1):
""" With efficient level for training. """
if mode in [compat.ModeKeys.INFER, compat.ModeKeys.EVAL]:
return super(Translation, self).create_and_batch_tfds(
ds, mode, args, num_replicas_in_sync)
if args is None:
args = self._args
else:
args = deep_merge_dict(self._args, args, local_overwrite=False)
level = args.get("gpu_efficient_level", None)
auto_scale_batch = args.get("auto_scaling_batch_size", None)
logging.info(f"Creating training dataset with GPU efficient level={level}.")
dataset = ds.build(map_func=self.get_data_preprocess_fn(mode, ds.status, args),
map_output_dtypes=self.inputs_signature(mode)[0],
auto_shard=True, shuffle=True)
dataset = dataset_utils.clean_dataset_by_length(
dataset, {"feature": args["max_src_len"], "label": args["max_trg_len"]})
if args["cache_dataset"]:
dataset = dataset.cache()
if args["shuffle_buffer"]:
dataset = dataset.shuffle(buffer_size=args["shuffle_buffer"])
padding_values = {"feature": tf.constant(self._src_data_pipeline.meta["eos_id"], dtype=tf.int64),
"label": tf.constant(self._trg_data_pipeline.meta["eos_id"], dtype=tf.int64)}
if args["max_src_len"] is None:
raise RuntimeError("Must provide `max_src_len` for training.")
if args["max_trg_len"] is None:
raise RuntimeError("Must provide `max_trg_len` for training.")
max_src_len = minimal_multiple(args["max_src_len"], EFFICIENT_MULTIPLIER[level])
max_trg_len = minimal_multiple(args["max_trg_len"], EFFICIENT_MULTIPLIER[level])
max_len = max(max_src_len, max_trg_len)
batch_size = dataset_utils.adjust_batch_size(args["batch_size"], args["batch_size_per_gpu"],
num_replicas_in_sync=num_replicas_in_sync,
verbose=False)
if auto_scale_batch:
batch_size = _auto_scale_batch_size(batch_size, level)
logging.info(f"Auto scaling batch size to {batch_size}.")
if level == GPU_EFFICIENT_LEVEL.LEVEL5: # static batch
_batch_size = batch_size
if args["batch_by_tokens"]:
_batch_size = _batch_size // max_len
logging.info("Batching dataset with fixed shape: "
f"batch={_batch_size} x (feature={max_src_len}, label={max_trg_len}).")
return dataset.padded_batch(
_batch_size // num_replicas_in_sync * num_replicas_in_sync,
padded_shapes={"feature": [max_src_len], "label": [max_trg_len]},
drop_remainder=True, padding_values=padding_values)
else:
src_bucket_boundaries = [EFFICIENT_MULTIPLIER[level] * i for i in
range(1, max_src_len // EFFICIENT_MULTIPLIER[level] + 1)]
if src_bucket_boundaries[-1] < max_src_len:
src_bucket_boundaries.append(minimal_multiple(src_bucket_boundaries[-1] + 1,
EFFICIENT_MULTIPLIER[level]))
trg_bucket_boundaries = [EFFICIENT_MULTIPLIER[level] * i for i in
range(1, max_trg_len // EFFICIENT_MULTIPLIER[level] + 1)]
if trg_bucket_boundaries[-1] < max_trg_len:
trg_bucket_boundaries.append(minimal_multiple(trg_bucket_boundaries[-1] + 1,
EFFICIENT_MULTIPLIER[level]))
src_bucket_boundaries, trg_bucket_boundaries = dataset_utils.associated_bucket_boundaries(
src_bucket_boundaries, trg_bucket_boundaries)
bucket_boundaries = {
"feature": src_bucket_boundaries,
"label": trg_bucket_boundaries
}
bucket_batch_sizes = dataset_utils.adjust_batch_size(
batch_size,
bucket_boundaries=bucket_boundaries if args["batch_by_tokens"] else None,
boundaries_reduce_to_length_fn=lambda x: max(tf.nest.flatten(x)),
num_replicas_in_sync=num_replicas_in_sync)
if level != GPU_EFFICIENT_LEVEL.LEVEL0:
if isinstance(bucket_batch_sizes, list):
bucket_batch_sizes = [
int(maximum_lower_multiple(x // num_replicas_in_sync,
EFFICIENT_MULTIPLIER[level]) * num_replicas_in_sync)
for x in bucket_batch_sizes]
else:
bucket_batch_sizes = int(maximum_lower_multiple(
bucket_batch_sizes // num_replicas_in_sync,
EFFICIENT_MULTIPLIER[level]) * num_replicas_in_sync)
return dataset_utils.batch_examples_by_token(
dataset,
bucket_boundaries=bucket_boundaries,
bucket_batch_sizes=bucket_batch_sizes,
padding_values=padding_values,
example_length_func=lambda x: {k: tf.size(v) for k, v in x.items()}
)