def __init__(self, name, num_splits, input_size, ff_size, dropout,
dropout_prob, epsilon, use_default_memory_proportion,
available_memory_proportion, **kwargs):
scope_provider = kwargs['scope_provider']
super().__init__(params=[], scope=scope_provider.get_scope(name), **kwargs)
ffwd_splits = []
self.split_size = input_size // num_splits
self.name = name
for i in range(num_splits):
ffwd_splits.append(
FeedForward(f'{name}/Split{i}',
self.split_size,
ff_size,
dropout,
dropout_prob,
epsilon,
residual=False,
use_default_memory_proportion=use_default_memory_proportion,
available_memory_proportion=available_memory_proportion,
**kwargs))
self.layers = ffwd_splits
self.accum_scope = scope_provider.get_scope(f'{name}/FFAccum', 'next')
self.norm = Norm(
scope_provider.get_scope(
f'{name}/FFNorm', self.accum_scope.execution_phase),
input_size, epsilon, **kwargs)
if dropout:
self.dropout = Dropout(
scope_provider.get_scope(f'{name}/FFDropout',
self.accum_scope.execution_phase), dropout_prob,
**kwargs)
else:
self.dropout = lambda x: x
self.total_execution_phases = self.total_phases()
def __init__(self,
name,
input_size,
ff_size,
dropout,
dropout_prob,
epsilon,
residual=True,
intermediate_act_func='gelu',
alpha=None,
increment_scope=True,
serialize_matmul=False,
use_default_memory_proportion=True,
available_memory_proportion=None,
**kwargs):
scope_provider = kwargs['scope_provider']
self.apply_dropout = dropout
if increment_scope:
scope = scope_provider.get_scope(name, 'next')
else:
scope = scope_provider.get_scope(name, 'prev')
super(FeedForward, self).__init__(params=[], scope=scope, **kwargs)
self.residual = residual
if serialize_matmul:
split = Split(dim='output_channels',
num_splits=ff_size // input_size)
else:
split = None
self.dense1 = Dense(
scope_provider.get_scope("1", 'prev'),
input_size,
ff_size,
split=split,
activation=intermediate_act_func,
alpha=alpha,
use_default_memory_proportion=use_default_memory_proportion,
available_memory_proportion=available_memory_proportion,
**kwargs)
if serialize_matmul:
split = Split(dim='reducing_dim', num_splits=ff_size // input_size)
else:
split = None
self.dense2 = Dense(
scope_provider.get_scope("2", "prev"),
ff_size,
input_size,
split=split,
activation=None,
use_default_memory_proportion=use_default_memory_proportion,
available_memory_proportion=available_memory_proportion,
**kwargs)
if residual:
if dropout:
self.dropout = Dropout(
scope_provider.get_scope("Dropout", "prev"), dropout_prob,
**kwargs)
self.norm = Norm(scope_provider.get_scope("Norm", "prev"),
input_size, epsilon, **kwargs)
self.total_execution_phases = self.total_phases()
def __init__(self, name: str, num_splits, hidden_size, num_heads,
serialize_matmul, available_memory_proportion, epsilon,
dropout, dropout_prob, attn_dropout, attn_dropout_prob,
batch_size, sequence_length, dtype, task, num_mask_tokens,
use_default_mem_proportion, **kwargs):
scope_provider = kwargs['scope_provider']
# AttentionSplitHidden splits the num_heads, keeping size_per_head same.
# Since hidden_size = num_heads * size_per_head , num_heads and hiddden_size
# should be multiple of num_splits.
if hidden_size % num_splits:
raise ValueError('Hidden size must be a multiple of num_splits.')
if num_heads % num_splits:
raise ValueError('Num heads must be a multiple of num_splits.')
super().__init__(params=[],
scope=scope_provider.get_scope(name),
**kwargs)
attention_splits = []
self.split_size = hidden_size // num_splits
self.name = name
for i in range(num_splits):
attention_splits.append(
Attention(
f"Split{i}",
hidden_size,
self.split_size,
num_heads // num_splits,
serialize_matmul,
available_memory_proportion,
epsilon,
dropout,
dropout_prob,
attn_dropout,
attn_dropout_prob,
batch_size,
sequence_length,
dtype,
task,
num_mask_tokens,
residual=False,
use_default_mem_proportion=use_default_mem_proportion,
**kwargs))
self.layers = attention_splits
self.accum_scope = scope_provider.get_scope(f'AttnAccum', 'next')
self.norm = Norm(
scope_provider.get_scope(f'AttnNorm',
self.accum_scope.execution_phase),
hidden_size, epsilon, dtype, **kwargs)
if dropout:
self.dropout = Dropout(scope_provider.get_scope(
f'AttnDropout', self.accum_scope.execution_phase),
dropout_prob,
dtype=dtype,
**kwargs)
else:
self.dropout = lambda x: x
def __init__(self, vocab_size, hidden_size, sequence_length,
max_positional_length, num_vocab_splits, epsilon,
apply_dropout, dropout_prob, mode, dtype, detach,
weight_transposed, custom=True, **kwargs):
scope_provider = kwargs['scope_provider']
additional_scopes = [kwargs['builder'].outlineAttributes({'outline_scope': 'Embeddings'})]
scope = scope_provider.get_scope('Embeddings', additional_scopes=additional_scopes)
super().__init__(scope, **kwargs)
if num_vocab_splits > 1:
self.token_embedding = EmbeddingSerialised(
scope_provider.get_scope('Token'),
input_dim=vocab_size,
output_dim=hidden_size,
num_splits=num_vocab_splits,
custom=custom,
dtype=dtype,
detach=detach,
weight_transposed=weight_transposed,
**kwargs)
else:
self.token_embedding = Embedding(
scope_provider.get_scope('Token', execution_phase='next'),
input_dim=vocab_size,
output_dim=hidden_size,
custom=custom,
dtype=dtype,
detach=detach,
weight_transposed=weight_transposed,
**kwargs)
num_segments = 2
self.segment_embedding = Embedding(
scope_provider.get_scope(
'Segment', execution_phase='next'), num_segments,
hidden_size, dtype, **kwargs)
self.position_embedding = Embedding(
scope_provider.get_scope('Position', execution_phase='prev'),
max_positional_length,
hidden_size,
dtype,
**kwargs)
self.add = Add(scope_provider.get_scope('Sum', execution_phase='prev'), **kwargs)
self.norm = Norm(scope_provider.get_scope('Norm', execution_phase='prev'),
hidden_size, epsilon, dtype, **kwargs)
self.apply_dropout = apply_dropout
if apply_dropout:
self.dropout = Dropout(
scope_provider.get_scope(
'Dropout', execution_phase='prev'), dropout_prob,
**kwargs)
self.total_execution_phases = self.total_phases()
def __init__(self,
name: str,
input_size,
hidden_size,
num_heads,
serialize_matmul,
available_memory_proportion,
epsilon,
dropout,
dropout_prob,
attn_dropout,
attn_dropout_prob,
batch_size,
sequence_length,
dtype,
task,
num_mask_tokens,
split_qkv=False,
residual=True,
prefetch_masks=True,
use_default_mem_proportion=True,
mask=None,
**kwargs):
if split_qkv:
params = [
Parameter(name='Q',
shape=[input_size, hidden_size],
value=None),
Parameter(name='K',
shape=[input_size, hidden_size],
value=None),
Parameter(name='V',
shape=[input_size, hidden_size],
value=None),
Parameter(name='Out',
shape=[hidden_size, input_size],
value=None)
]
else:
params = [
Parameter(name='QKV',
shape=[input_size, 3 * hidden_size],
value=None),
Parameter(name='Out',
shape=[hidden_size, input_size],
value=None)
]
scope_provider = kwargs['scope_provider']
super(Attention,
self).__init__(params=params,
scope=scope_provider.get_scope(name, 'next'),
dtype=dtype,
**kwargs)
self.num_heads = num_heads
self.hidden_size = hidden_size
self.serialize_matmul = serialize_matmul
self.available_memory_proportion = available_memory_proportion
self.use_default_mem_proportion = use_default_mem_proportion
self.split_qkv = split_qkv
self.batch_size = batch_size
self.seq_len = sequence_length
if hidden_size % num_heads != 0:
raise ValueError('Hidden size must be a multiple of num_heads')
self.qkv_length = hidden_size // num_heads
self.dtype = dtype
self.residual = residual
self.task = task
self.num_mask_tokens = num_mask_tokens
self.mask = mask
self.prefetch_masks = prefetch_masks
if prefetch_masks:
additional_scopes = [
self.builder.recomputeOutput(popart.RecomputeType.Checkpoint),
self.builder.outputTensorLocation(
popart.TensorLocation(popart.TensorStorage.OnChip))
]
self.mask_execution_phase = scope_provider.get_scope(
'Mask', 'prev').execution_phase % 2
self.mask_scope = scope_provider.get_scope(
'Mask',
self.mask_execution_phase,
additional_scopes=additional_scopes)
else:
self.mask_scope = scope_provider.get_scope('Mask', 'prev')
if self.residual:
self.norm = Norm(scope_provider.get_scope('Norm', 'prev'),
hidden_size, epsilon, dtype, **kwargs)
if dropout:
self.dropout = Dropout(scope_provider.get_scope('Dropout', 'prev'),
dropout_prob, **kwargs)
else:
self.dropout = lambda x: x
if attn_dropout:
self.attn_dropout = Dropout(
scope_provider.get_scope('AttnDropout', 'prev'),
attn_dropout_prob, **kwargs)
else:
self.attn_dropout = lambda x: x
self.total_execution_phases = self.total_phases()