def main(cmd):
cfg = yaml.safe_load(cmd.cfg.read())
print(yaml.dump(cfg, default_flow_style=False))
root_dir = os.path.join(cfg['training']['path'], cfg['name'])
if not os.path.exists(root_dir):
os.makedirs(root_dir)
tfprocess = TFProcess(cfg)
tfprocess.init_net_v2()
tfprocess.restore_v2()
START_FROM = cmd.start
tfprocess.global_step.assign(START_FROM)
tfprocess.manager.save(checkpoint_number=START_FROM)
def main(cmd):
cfg = yaml.safe_load(cmd.cfg.read())
print(yaml.dump(cfg, default_flow_style=False))
num_chunks = cfg['dataset']['num_chunks']
allow_less = cfg['dataset'].get('allow_less_chunks', False)
train_ratio = cfg['dataset']['train_ratio']
experimental_parser = cfg['dataset'].get('experimental_v5_only_dataset',
False)
num_train = int(num_chunks * train_ratio)
num_test = num_chunks - num_train
if 'input_test' in cfg['dataset']:
train_chunks = get_latest_chunks(cfg['dataset']['input_train'],
num_train, allow_less)
test_chunks = get_latest_chunks(cfg['dataset']['input_test'], num_test,
allow_less)
else:
chunks = get_latest_chunks(cfg['dataset']['input'], num_chunks,
allow_less)
if allow_less:
num_train = int(len(chunks) * train_ratio)
num_test = len(chunks) - num_train
train_chunks = chunks[:num_train]
test_chunks = chunks[num_train:]
shuffle_size = cfg['training']['shuffle_size']
total_batch_size = cfg['training']['batch_size']
batch_splits = cfg['training'].get('num_batch_splits', 1)
train_workers = cfg['dataset'].get('train_workers', None)
test_workers = cfg['dataset'].get('test_workers', None)
if total_batch_size % batch_splits != 0:
raise ValueError('num_batch_splits must divide batch_size evenly')
split_batch_size = total_batch_size // batch_splits
# Load data with split batch size, which will be combined to the total batch size in tfprocess.
ChunkParser.BATCH_SIZE = split_batch_size
root_dir = os.path.join(cfg['training']['path'], cfg['name'])
if not os.path.exists(root_dir):
os.makedirs(root_dir)
tfprocess = TFProcess(cfg)
experimental_reads = max(2, mp.cpu_count() - 2) // 2
extractor = select_extractor(tfprocess.INPUT_MODE)
def read(x):
return tf.data.FixedLengthRecordDataset(
x,
8308,
compression_type='GZIP',
num_parallel_reads=experimental_reads)
if experimental_parser:
train_dataset = tf.data.Dataset.from_tensor_slices(train_chunks).shuffle(len(train_chunks)).repeat().batch(256)\
.interleave(read, num_parallel_calls=2)\
.batch(SKIP_MULTIPLE*SKIP).map(semi_sample).unbatch()\
.shuffle(shuffle_size)\
.batch(split_batch_size).map(extractor).prefetch(4)
else:
train_parser = ChunkParser(train_chunks,
tfprocess.INPUT_MODE,
shuffle_size=shuffle_size,
sample=SKIP,
batch_size=ChunkParser.BATCH_SIZE,
workers=train_workers)
train_dataset = tf.data.Dataset.from_generator(
train_parser.parse,
output_types=(tf.string, tf.string, tf.string, tf.string,
tf.string))
train_dataset = train_dataset.map(ChunkParser.parse_function)
train_dataset = train_dataset.prefetch(4)
shuffle_size = int(shuffle_size * (1.0 - train_ratio))
if experimental_parser:
test_dataset = tf.data.Dataset.from_tensor_slices(test_chunks).shuffle(len(test_chunks)).repeat().batch(256)\
.interleave(read, num_parallel_calls=2)\
.batch(SKIP_MULTIPLE*SKIP).map(semi_sample).unbatch()\
.shuffle(shuffle_size)\
.batch(split_batch_size).map(extractor).prefetch(4)
else:
test_parser = ChunkParser(test_chunks,
tfprocess.INPUT_MODE,
shuffle_size=shuffle_size,
sample=SKIP,
batch_size=ChunkParser.BATCH_SIZE,
workers=test_workers)
test_dataset = tf.data.Dataset.from_generator(
test_parser.parse,
output_types=(tf.string, tf.string, tf.string, tf.string,
tf.string))
test_dataset = test_dataset.map(ChunkParser.parse_function)
test_dataset = test_dataset.prefetch(4)
validation_dataset = None
if 'input_validation' in cfg['dataset']:
valid_chunks = get_all_chunks(cfg['dataset']['input_validation'])
validation_dataset = tf.data.FixedLengthRecordDataset(valid_chunks, 8308, compression_type='GZIP', num_parallel_reads=experimental_reads)\
.batch(split_batch_size, drop_remainder=True).map(extractor).prefetch(4)
tfprocess.init_v2(train_dataset, test_dataset, validation_dataset)
tfprocess.restore_v2()
# If number of test positions is not given
# sweeps through all test chunks statistically
# Assumes average of 10 samples per test game.
# For simplicity, testing can use the split batch size instead of total batch size.
# This does not affect results, because test results are simple averages that are independent of batch size.
num_evals = cfg['training'].get('num_test_positions',
len(test_chunks) * 10)
num_evals = max(1, num_evals // ChunkParser.BATCH_SIZE)
print("Using {} evaluation batches".format(num_evals))
tfprocess.process_loop_v2(total_batch_size,
num_evals,
batch_splits=batch_splits)
if cmd.output is not None:
if cfg['training'].get('swa_output', False):
tfprocess.save_swa_weights_v2(cmd.output)
else:
tfprocess.save_leelaz_weights_v2(cmd.output)
train_parser.shutdown()
test_parser.shutdown()