def test_attention_fwd(custom_ops):
# ------------------- PopART --------------------
builder = popart.Builder()
config = BertConfig(task="PRETRAINING",
vocab_length=9728,
batch_size=1,
hidden_size=768,
sequence_length=128,
activation_type='relu',
popart_dtype="FLOAT",
no_dropout=True,
custom_ops=['attention'],
inference=True)
popart_model = Bert(config, builder=builder)
input_info = popart.TensorInfo(
config.popart_dtype,
[config.batch_size * config.sequence_length, config.hidden_size])
input_tensor = builder.addInputTensor(input_info)
mask_info = popart.TensorInfo("INT32", [config.batch_size])
mmask_tensor = builder.addInputTensor(mask_info)
smask_tensor = builder.addInputTensor(mask_info)
data = {
input_tensor:
np.random.normal(0, 0.02, input_info.shape()).astype(config.dtype),
mmask_tensor:
np.random.randint(0, config.mask_tokens + 1,
(config.batch_size, )).astype(np.int32),
smask_tensor:
np.random.randint(config.mask_tokens, config.sequence_length + 1,
(config.batch_size, )).astype(np.int32)
}
output = popart_model.attention(input_tensor, [mmask_tensor, smask_tensor])
proto = builder.getModelProto()
outputs, post_proto = run_py(proto, data, output)
# ----------------- PopART -> PyTorch ----------------
proto = onnx.load_model_from_string(proto)
inputs = [
data[input_tensor].reshape(config.batch_size, config.sequence_length,
config.hidden_size).astype(np.float32),
get_torch_mask(config, [data[mmask_tensor], data[smask_tensor]])
]
torch_to_onnx = {
"self.query.weight": "QKV",
"self.key.weight": "QKV",
"self.value.weight": "QKV",
"output.dense.weight": "Out",
"output.LayerNorm.weight": "Gamma",
"output.LayerNorm.bias": "Beta"
}
split_qkv = {
"self.query.weight":
lambda arr: arr[:, 0:config.hidden_size].T,
"self.key.weight":
lambda arr: arr[:, config.hidden_size:config.hidden_size * 2].T,
"self.value.weight":
lambda arr: arr[:, config.hidden_size * 2:config.hidden_size * 3].T,
"output.dense.weight":
np.transpose
}
# ------------------- PyTorch -------------------------
torch_model = BertAttention(
TorchBertConfig(config.vocab_length,
config.hidden_size,
config.num_layers,
config.attention_heads,
layer_norm_eps=config.layer_norm_eps))
# Turn off dropout
torch_model.eval()
copy_weights_to_torch(torch_model,
proto,
torch_to_onnx,
transform=split_qkv)
# Model to test against
torch_outputs = run_fwd_model(inputs, torch_model)
check_tensors(torch_outputs, outputs)
def test_attention_bwd(attention_bias, split_qkv):
l1_lambda = 0.1
num_reps = 5
np.random.seed(1984)
torch.manual_seed(1984)
# ------------------- PopART --------------------
config = BertConfig(task="PRETRAINING",
vocab_length=9728,
micro_batch_size=1,
hidden_size=768,
sequence_length=128,
activation_type='relu',
popart_dtype="FLOAT",
no_dropout=True,
no_attn_dropout=True,
split_qkv=split_qkv,
attention_bias=attention_bias)
popart_model = Bert(config, pipeline=True)
input_info = popart.TensorInfo(
config.popart_dtype,
[config.micro_batch_size * config.sequence_length, config.hidden_size])
input_tensor = popart_model.builder.addInputTensor(input_info)
mask_info = popart.TensorInfo(
"UINT32", [config.micro_batch_size, config.sequence_length])
mmask_tensor = popart_model.builder.addInputTensor(mask_info)
smask_tensor = popart_model.builder.addInputTensor(mask_info)
data = {
input_tensor:
np.random.normal(0, 0.02, input_info.shape()).astype(config.dtype),
mmask_tensor:
np.random.randint(0, config.mask_tokens + 1, (
config.micro_batch_size,
config.sequence_length,
)).astype(np.uint32),
smask_tensor:
np.random.randint(config.mask_tokens, config.sequence_length + 1, (
config.micro_batch_size,
config.sequence_length,
)).astype(np.uint32)
}
user_options = {}
output = popart_model.attention(input_tensor, [mmask_tensor, smask_tensor])
l1 = popart_model.builder.aiGraphcore.l1loss(
[output], l1_lambda, reduction=popart.ReductionType.Sum)
proto = popart_model.builder.getModelProto()
optimizer = popart.ConstSGD(0.01)
outputs, post_proto = run_py(proto,
data, (output, l1),
loss=l1,
optimizer=optimizer,
num_reps=num_reps,
user_options=user_options,
pipeline=popart_model.pipeline)
# ----------------- PopART -> PyTorch ----------------
proto = onnx.load_model_from_string(proto)
inputs = [
data[input_tensor].reshape(config.micro_batch_size,
config.sequence_length, config.hidden_size),
get_torch_mask(config, [data[mmask_tensor], data[smask_tensor]])
]
# ------------------- PyTorch -------------------------
torch_model = BertAttention(
TorchBertConfig(config.vocab_length,
config.hidden_size,
config.num_layers,
config.attention_heads,
attention_bias=config.attention_bias,
layer_norm_eps=config.layer_norm_eps))
# Turn off dropout
torch_model.eval()
mapping = TORCH_TO_ONNX_SPLIT_QKV if split_qkv else TORCH_TO_ONNX
copy_weights_to_torch(torch_model,
proto,
mapping,
transform=get_transform(split_qkv,
config.hidden_size))
optim = torch.optim.SGD(torch_model.parameters(), 0.01)
for _ in range(num_reps):
torch_output = torch_model(
*[torch.from_numpy(t).float() for t in inputs])[0]
torch_loss = l1_lambda * torch.norm(torch_output, 1)
torch_loss.backward()
optim.step()
optim.zero_grad()
check_tensors([torch_output.detach().numpy()], outputs, margin=6e-07)
check_model(torch_model,
post_proto,
mapping,
transform=get_transform(split_qkv, config.hidden_size),
margin=2e-7)
def test_attention_bwd(custom_ops):
l1_lambda = 0.1
# ------------------- PopART --------------------
builder = popart.Builder()
config = BertConfig(task="PRETRAINING",
vocab_length=9728,
batch_size=1,
hidden_size=768,
sequence_length=128,
activation_type='relu',
popart_dtype="FLOAT",
no_dropout=True,
custom_ops=['attention'])
popart_model = Bert(config, builder=builder)
input_info = popart.TensorInfo(
config.popart_dtype,
[config.batch_size * config.sequence_length, config.hidden_size])
input_tensor = builder.addInputTensor(input_info)
mask_info = popart.TensorInfo("INT32", [config.batch_size])
mmask_tensor = builder.addInputTensor(mask_info)
smask_tensor = builder.addInputTensor(mask_info)
data = {
input_tensor:
np.random.normal(0, 0.02, input_info.shape()).astype(config.dtype),
mmask_tensor:
np.random.randint(0, config.mask_tokens + 1,
(config.batch_size, )).astype(np.int32),
smask_tensor:
np.random.randint(config.mask_tokens, config.sequence_length + 1,
(config.batch_size, )).astype(np.int32)
}
output = popart_model.attention(input_tensor, [mmask_tensor, smask_tensor])
proto = builder.getModelProto()
l1 = popart.L1Loss(output, "l1LossVal", l1_lambda)
optimizer = popart.ConstSGD(0.01)
outputs, post_proto = run_py(proto,
data, (output, l1.output(0)),
loss=l1,
optimizer=optimizer)
# ----------------- PopART -> PyTorch ----------------
proto = onnx.load_model_from_string(proto)
inputs = [
data[input_tensor].reshape(config.batch_size, config.sequence_length,
config.hidden_size),
get_torch_mask(config, [data[mmask_tensor], data[smask_tensor]])
]
torch_to_onnx = {
"self.query.weight": "QKV",
"self.key.weight": "QKV",
"self.value.weight": "QKV",
"output.dense.weight": "Out",
"output.LayerNorm.weight": "Gamma",
"output.LayerNorm.bias": "Beta"
}
split_qkv = {
"self.query.weight":
lambda arr: arr[:, 0:config.hidden_size].T,
"self.key.weight":
lambda arr: arr[:, config.hidden_size:config.hidden_size * 2].T,
"self.value.weight":
lambda arr: arr[:, config.hidden_size * 2:config.hidden_size * 3].T,
"output.dense.weight":
np.transpose
}
# ------------------- PyTorch -------------------------
torch_model = BertAttention(
TorchBertConfig(config.vocab_length,
config.hidden_size,
config.num_layers,
config.attention_heads,
layer_norm_eps=config.layer_norm_eps))
# Turn off dropout
torch_model.eval()
copy_weights_to_torch(torch_model,
proto,
torch_to_onnx,
transform=split_qkv)
optim = torch.optim.SGD(torch_model.parameters(),
0.01,
weight_decay=0.0,
momentum=0.0)
torch_output = torch_model(*[torch.from_numpy(t).float()
for t in inputs])[0]
torch_loss = l1_lambda * torch.norm(torch_output, 1)
torch_loss.backward()
optim.step()
check_tensors([torch_output.detach().numpy()], outputs)
check_model(torch_model, post_proto, torch_to_onnx, transform=split_qkv)
def test_attention_fwd(attention_bias, split_qkv):
# ------------------- PopART --------------------
config = BertConfig(task="PRETRAINING",
vocab_length=9728,
micro_batch_size=1,
hidden_size=768,
attention_heads=4,
sequence_length=128,
activation_type='relu',
popart_dtype="FLOAT",
no_dropout=True,
no_attn_dropout=True,
inference=True,
split_qkv=split_qkv,
attention_bias=attention_bias)
popart_model = Bert(config, pipeline=True)
input_info = popart.TensorInfo(
config.popart_dtype,
[config.micro_batch_size * config.sequence_length, config.hidden_size])
input_tensor = popart_model.builder.addInputTensor(input_info)
mask_info = popart.TensorInfo(
"UINT32", [config.micro_batch_size, config.sequence_length])
mmask_tensor = popart_model.builder.addInputTensor(mask_info)
smask_tensor = popart_model.builder.addInputTensor(mask_info)
data = {
input_tensor:
np.random.normal(0, 0.02, input_info.shape()).astype(config.dtype),
mmask_tensor:
np.random.randint(0, config.mask_tokens + 1, (
config.micro_batch_size,
config.sequence_length,
)).astype(np.uint32),
smask_tensor:
np.random.randint(config.mask_tokens, config.sequence_length + 1, (
config.micro_batch_size,
config.sequence_length,
)).astype(np.uint32)
}
user_options = {"enableStochasticRounding": True}
output = popart_model.attention(input_tensor, [mmask_tensor, smask_tensor])
proto = popart_model.builder.getModelProto()
outputs, post_proto = run_py(proto,
data,
output,
user_options=user_options,
pipeline=popart_model.pipeline)
# ----------------- PopART -> PyTorch ----------------
proto = onnx.load_model_from_string(proto)
inputs = [
data[input_tensor].reshape(config.micro_batch_size,
config.sequence_length,
config.hidden_size).astype(np.float32),
get_torch_mask(config, [data[mmask_tensor], data[smask_tensor]])
]
# ------------------- PyTorch -------------------------
torch_model = BertAttention(
TorchBertConfig(config.vocab_length,
config.hidden_size,
config.num_layers,
config.attention_heads,
attention_bias=config.attention_bias,
layer_norm_eps=config.layer_norm_eps))
# Turn off dropout
torch_model.eval()
mapping = TORCH_TO_ONNX_SPLIT_QKV if split_qkv else TORCH_TO_ONNX
copy_weights_to_torch(torch_model,
proto,
mapping,
transform=get_transform(split_qkv,
config.hidden_size))
# Model to test against
torch_outputs = run_fwd_model(inputs, torch_model)
check_tensors(torch_outputs, outputs)