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Signed-off-by: Rauf <[email protected]>
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# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. |
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# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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from typing import Union | ||
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import torch | ||
import torch.nn as nn | ||
from transformers import CLIPTextModel, CLIPTokenizer, T5EncoderModel, T5Tokenizer | ||
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class AbstractEmbModel(nn.Module): | ||
def __init__(self, enable_lora_finetune=False, target_block=[], target_module=[]): | ||
super().__init__() | ||
self._is_trainable = None | ||
self._ucg_rate = None | ||
self._input_key = None | ||
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self.TARGET_BLOCK = target_block | ||
self.TARGET_MODULE = target_module | ||
if enable_lora_finetune: | ||
self.lora_layers = [] | ||
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@property | ||
def is_trainable(self) -> bool: | ||
return self._is_trainable | ||
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@property | ||
def ucg_rate(self) -> Union[float, torch.Tensor]: | ||
return self._ucg_rate | ||
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@property | ||
def input_key(self) -> str: | ||
return self._input_key | ||
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@is_trainable.setter | ||
def is_trainable(self, value: bool): | ||
self._is_trainable = value | ||
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@ucg_rate.setter | ||
def ucg_rate(self, value: Union[float, torch.Tensor]): | ||
self._ucg_rate = value | ||
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@input_key.setter | ||
def input_key(self, value: str): | ||
self._input_key = value | ||
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@is_trainable.deleter | ||
def is_trainable(self): | ||
del self._is_trainable | ||
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@ucg_rate.deleter | ||
def ucg_rate(self): | ||
del self._ucg_rate | ||
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@input_key.deleter | ||
def input_key(self): | ||
del self._input_key | ||
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def encode(self, *args, **kwargs): | ||
raise NotImplementedError | ||
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def _enable_lora(self, lora_model): | ||
for module_name, module in lora_model.named_modules(): | ||
if module.__class__.__name__ in self.TARGET_BLOCK: | ||
tmp = {} | ||
for sub_name, sub_module in module.named_modules(): | ||
if sub_module.__class__.__name__ in self.TARGET_MODULE: | ||
if hasattr(sub_module, "input_size") and hasattr( | ||
sub_module, "output_size" | ||
): # for megatron ParallelLinear | ||
lora = LoraWrapper(sub_module, sub_module.input_size, sub_module.output_size) | ||
else: # for nn.Linear | ||
lora = LoraWrapper(sub_module, sub_module.in_features, sub_module.out_features) | ||
self.lora_layers.append(lora) | ||
if sub_name not in tmp.keys(): | ||
tmp.update({sub_name: lora}) | ||
else: | ||
print(f"Duplicate subnames are found in module {module_name}") | ||
for sub_name, lora_layer in tmp.items(): | ||
lora_name = f'{sub_name}_lora' | ||
module.add_module(lora_name, lora_layer) | ||
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class FrozenCLIPEmbedder(AbstractEmbModel): | ||
"""Uses the CLIP transformer encoder for text (from Hugging Face)""" | ||
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LAYERS = ["last", "pooled", "hidden"] | ||
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def __init__( | ||
self, | ||
version="openai/clip-vit-large-patch14", | ||
device="cuda", | ||
max_length=77, | ||
enable_lora_finetune=False, | ||
layer="last", | ||
layer_idx=None, | ||
always_return_pooled=False, | ||
dtype=torch.float, | ||
): | ||
super().__init__(enable_lora_finetune, target_block=["CLIPAttention", "CLIPMLP"], target_module=["Linear"]) | ||
self.tokenizer = CLIPTokenizer.from_pretrained("openai/clip-vit-large-patch14") | ||
self.transformer = CLIPTextModel.from_pretrained(version, torch_dtype=dtype).to(device) | ||
self.device = device | ||
self.max_length = max_length | ||
self.freeze() | ||
if enable_lora_finetune: | ||
self._enable_lora(self.transformer) | ||
print(f"CLIP transformer encoder add {len(self.lora_layers)} lora layers.") | ||
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self.layer = layer | ||
self.layer_idx = layer_idx | ||
self.return_pooled = always_return_pooled | ||
if layer == "hidden": | ||
assert layer_idx is not None | ||
assert 0 <= abs(layer_idx) <= 12 | ||
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def freeze(self): | ||
self.transformer = self.transformer.eval() | ||
for param in self.parameters(): | ||
param.requires_grad = False | ||
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def forward(self, text, max_sequence_length=None): | ||
batch_encoding = self.tokenizer( | ||
text, | ||
truncation=True, | ||
max_length=max_sequence_length if max_sequence_length else self.max_length, | ||
return_length=True, | ||
return_overflowing_tokens=False, | ||
padding="max_length", | ||
return_tensors="pt", | ||
) | ||
tokens = batch_encoding["input_ids"].to(self.transformer.device, non_blocking=True) | ||
outputs = self.transformer(input_ids=tokens, output_hidden_states=(self.layer == "hidden")) | ||
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if self.layer == "last": | ||
z = outputs.last_hidden_state | ||
elif self.layer == "pooled": | ||
z = outputs.pooler_output[:, None, :] | ||
else: | ||
z = outputs.hidden_states[self.layer_idx] | ||
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# Pad the seq length to multiple of 8 | ||
seq_len = (z.shape[1] + 8 - 1) // 8 * 8 | ||
z = torch.nn.functional.pad(z, (0, 0, 0, seq_len - z.shape[1]), value=0.0) | ||
if self.return_pooled: | ||
return z, outputs.pooler_output | ||
return z | ||
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def encode(self, text): | ||
return self(text) | ||
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class FrozenT5Embedder(AbstractEmbModel): | ||
def __init__( | ||
self, | ||
version="google/t5-v1_1-xxl", | ||
max_length=512, | ||
device="cuda", | ||
dtype=torch.float, | ||
): | ||
super().__init__() | ||
self.tokenizer = T5Tokenizer.from_pretrained("google/t5-v1_1-xxl", max_length=max_length) | ||
self.transformer = T5EncoderModel.from_pretrained(version, torch_dtype=dtype).to(device) | ||
self.max_length = max_length | ||
self.freeze() | ||
self.device = device | ||
self.dtype = dtype | ||
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def freeze(self): | ||
self.transformer = self.transformer.eval() | ||
for param in self.parameters(): | ||
param.requires_grad = False | ||
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def forward(self, text, max_sequence_length=None): | ||
batch_encoding = self.tokenizer( | ||
text, | ||
truncation=True, | ||
max_length=max_sequence_length if max_sequence_length else self.max_length, | ||
return_length=False, | ||
return_overflowing_tokens=False, | ||
padding="max_length", | ||
return_tensors="pt", | ||
) | ||
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tokens = batch_encoding["input_ids"].to(self.transformer.device, non_blocking=True) | ||
outputs = self.transformer(input_ids=tokens, output_hidden_states=None) | ||
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return outputs.last_hidden_state |
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