Upload model
Browse files- chatNT.py +1896 -0
- config.json +25 -34
- model-00001-of-00004.safetensors +3 -0
- model-00002-of-00004.safetensors +3 -0
- model-00003-of-00004.safetensors +3 -0
- model-00004-of-00004.safetensors +3 -0
- model.safetensors.index.json +763 -0
chatNT.py
ADDED
@@ -0,0 +1,1896 @@
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|
1 |
+
# This file stores ChatNT and all associated layers and configs
|
2 |
+
|
3 |
+
from dataclasses import asdict, dataclass, field
|
4 |
+
from typing import Dict, List, Optional, Tuple
|
5 |
+
|
6 |
+
import numpy as np
|
7 |
+
import torch
|
8 |
+
import torch.nn as nn
|
9 |
+
import torch.nn.functional as F # noqa: N812
|
10 |
+
from transformers import PretrainedConfig, PreTrainedModel
|
11 |
+
|
12 |
+
|
13 |
+
@dataclass
|
14 |
+
class RotaryEmbeddingConfig:
|
15 |
+
"""
|
16 |
+
Rotary Positional Embedding configuration
|
17 |
+
max_seq_len: The number of positions to encode and cache.
|
18 |
+
dim: Dimension of RoPE.
|
19 |
+
theta: Rotation angle.
|
20 |
+
"""
|
21 |
+
|
22 |
+
max_seq_len: int
|
23 |
+
dim: int
|
24 |
+
theta: float
|
25 |
+
|
26 |
+
|
27 |
+
@dataclass
|
28 |
+
class PerceiverResamplerConfig:
|
29 |
+
"""
|
30 |
+
Parameters to initialize an PerceiverResampler model.
|
31 |
+
|
32 |
+
Args:
|
33 |
+
emb_layer_norm_before: Whether to use layer norm before the first attention
|
34 |
+
layer.
|
35 |
+
attention_heads: Number of attention heads.
|
36 |
+
key_size: The dimension of the query, key, and values within each attention
|
37 |
+
head, if not specified, it is set to attention_heads//embed_dim.
|
38 |
+
It can be useful to set a custom key size if we want to impose the size of
|
39 |
+
the query, key and value tensor ( for example, tensors shaped with
|
40 |
+
power of 2 are more efficiently handled on TPUs ).
|
41 |
+
Note: Parametrizing the model with a custom key size has been done in :
|
42 |
+
Brown, Tom, et al. "Language models are few-shot learners."
|
43 |
+
Advances in neural information processing systems 33 (2020): 1877-1901.
|
44 |
+
embed_dim: Embedding dimension.
|
45 |
+
ffn_embed_dim: Feed forward embedding dimension.
|
46 |
+
num_layers: Number of attention blocks.
|
47 |
+
ffn_activation_name: Activation function to be used in FFN block. Supported
|
48 |
+
names are "gelu", "relu", "swish".
|
49 |
+
use_glu_in_ffn: Whether to use Gated Linear Unit (GLU) in Feed
|
50 |
+
Forward Network (FFN) block. To do a swiGLU (gated-swish) put this arg
|
51 |
+
to True and use swish as ffn_activation_name.
|
52 |
+
Same principle for a gated-relu. To keep the same number of parameters in
|
53 |
+
the FFN block, one should multiply by 2/3 the ffn_embed_dim when using GLU.
|
54 |
+
See https://arxiv.org/pdf/2002.05202.pdf for more details.
|
55 |
+
resampled_length: length of the resampled output of the module
|
56 |
+
use_gradient_checkpointing: Whether to use gradient checkpointing (checkpoint
|
57 |
+
gradients in the forward pass to reduce the computation in the backward).
|
58 |
+
"""
|
59 |
+
|
60 |
+
# architecture
|
61 |
+
emb_layer_norm_before: bool = False
|
62 |
+
attention_heads: int = 20
|
63 |
+
key_size: Optional[int] = None
|
64 |
+
embed_dim: int = 1280
|
65 |
+
ffn_embed_dim: int = 5120
|
66 |
+
num_layers: int = 24
|
67 |
+
add_bias_kv: bool = False
|
68 |
+
add_bias_ffn: bool = True
|
69 |
+
ffn_activation_name: str = "gelu-no-approx"
|
70 |
+
use_glu_in_ffn: bool = False
|
71 |
+
resampled_length: int = 64
|
72 |
+
|
73 |
+
# performance
|
74 |
+
use_gradient_checkpointing: bool = False
|
75 |
+
|
76 |
+
def __post_init__(self) -> None:
|
77 |
+
"""
|
78 |
+
Checks that the given values are compatible.
|
79 |
+
"""
|
80 |
+
|
81 |
+
if self.key_size is None:
|
82 |
+
if not self.embed_dim % self.attention_heads == 0:
|
83 |
+
raise ValueError(
|
84 |
+
f"When no key size is provided, the embedding dimension should be "
|
85 |
+
f"divisible by the number of heads, however provided embedding "
|
86 |
+
f"dimension is {self.embed_dim} and the number of heads is "
|
87 |
+
f"{self.attention_heads}."
|
88 |
+
)
|
89 |
+
self.key_size = self.embed_dim // self.attention_heads
|
90 |
+
|
91 |
+
|
92 |
+
@dataclass
|
93 |
+
class GptConfig:
|
94 |
+
"""
|
95 |
+
Parameters to initialize a Gpt model.
|
96 |
+
|
97 |
+
NOTE: the pad token is not defined
|
98 |
+
|
99 |
+
Args:
|
100 |
+
vocab_size: Token vocabulary.
|
101 |
+
eos_token_id: used to stop sentence generation
|
102 |
+
embed_dim: Embedding dimension.
|
103 |
+
ffn_embed_dim: Feed forward embedding dimension.
|
104 |
+
num_heads: Number of attention heads.
|
105 |
+
num_kv_heads: Number of key and value heads to support Grouped-Query and
|
106 |
+
Multi-Query Attention. If None, the number of key and value heads is
|
107 |
+
equal to the number of attention heads.
|
108 |
+
num_layers: Number of Decoder layer_stack
|
109 |
+
rope_config: The configuration for the rotary positional embeddings
|
110 |
+
add_bias_ffn: Add bias in feed forward network block.
|
111 |
+
ffn_activation_name: Activation function to be used in FFN block. Supported
|
112 |
+
names are "gelu", "gelu-no-approx", "relu", "swish".
|
113 |
+
use_glu_in_ffn: whether to use Gated Linear Unit (GLU) in Feed
|
114 |
+
Forward Network (FFN) block.
|
115 |
+
example: To do a swiGLU (gated-swish) put this arg
|
116 |
+
to True and use swish as ffn_activation_name.
|
117 |
+
Same principle for a gated-relu.
|
118 |
+
add_bias_lm_head: whether to use bias in the final LM layer
|
119 |
+
norm_type: The type of norm used ( pre normalization scheme ) used. can be
|
120 |
+
one of ["layer_norm", "RMS_norm"]
|
121 |
+
parallel_attention_ff: Whether to do the attention and the MLP in parallel,
|
122 |
+
and then sum up the results as it is done in Gpt-NeoX :
|
123 |
+
Black, Sid, et al. "Gpt-neox-20b: An open-source autoregressive
|
124 |
+
language model." arXiv preprint arXiv:2204.06745 (2022).
|
125 |
+
It is said to improve the training time of 15% when compiling with JAX
|
126 |
+
use_gradient_checkpointing: Whether to use gradient checkpointing (checkpoint
|
127 |
+
gradients in the forward pass to reduce the computation in the backward).
|
128 |
+
add_bias_attn: Add bias to the attention mechanism (key, query, value, and
|
129 |
+
output projections).
|
130 |
+
"""
|
131 |
+
|
132 |
+
# vocabulary
|
133 |
+
vocab_size: int
|
134 |
+
eos_token_id: int
|
135 |
+
|
136 |
+
# architecture
|
137 |
+
embed_dim: int = 16
|
138 |
+
ffn_embed_dim: int = 64
|
139 |
+
num_heads: int = 2
|
140 |
+
num_kv_heads: Optional[int] = None
|
141 |
+
num_layers: int = 2
|
142 |
+
rope_config: RotaryEmbeddingConfig = field(
|
143 |
+
default_factory=lambda: RotaryEmbeddingConfig(
|
144 |
+
max_seq_len=512, dim=8, theta=10000.0
|
145 |
+
)
|
146 |
+
)
|
147 |
+
add_bias_ffn: bool = False
|
148 |
+
ffn_activation_name: str = "swish"
|
149 |
+
use_glu_in_ffn: bool = True
|
150 |
+
add_bias_lm_head: bool = False
|
151 |
+
norm_type: str = "RMS_norm"
|
152 |
+
rms_norm_eps: float = 1e-6
|
153 |
+
parallel_attention_ff: bool = True
|
154 |
+
|
155 |
+
# inference / backward behavior
|
156 |
+
use_gradient_checkpointing: bool = False
|
157 |
+
|
158 |
+
# architecture params with default values
|
159 |
+
add_bias_attn: bool = False
|
160 |
+
|
161 |
+
def __post_init__(self) -> None:
|
162 |
+
"""
|
163 |
+
Checks that the given values are compatible.
|
164 |
+
"""
|
165 |
+
if not self.embed_dim % self.num_heads == 0:
|
166 |
+
raise ValueError(
|
167 |
+
f"The embedding dimension should be "
|
168 |
+
f"divisible by the number of heads, however provided embedding "
|
169 |
+
f"dimension is {self.embed_dim} and the number of heads is "
|
170 |
+
f"{self.num_heads}."
|
171 |
+
)
|
172 |
+
|
173 |
+
if not self.embed_dim // self.num_heads > 1:
|
174 |
+
raise ValueError(
|
175 |
+
"embed_dim / num_heads must be higher than 2 to apply rotary embeddings"
|
176 |
+
)
|
177 |
+
|
178 |
+
if not self.embed_dim // self.num_heads >= self.rope_config.dim:
|
179 |
+
raise ValueError(
|
180 |
+
"embed_dim // num_heads must be higher than rope_config.dim "
|
181 |
+
"to apply rotary embeddings"
|
182 |
+
)
|
183 |
+
|
184 |
+
def to_dict(self): # type: ignore
|
185 |
+
output = asdict(self)
|
186 |
+
output["rope_config"] = asdict(self.rope_config)
|
187 |
+
return output
|
188 |
+
|
189 |
+
|
190 |
+
@dataclass
|
191 |
+
class NucleotideTransformerConfig:
|
192 |
+
"""
|
193 |
+
Parameters to initialize an NT model.
|
194 |
+
|
195 |
+
Args:
|
196 |
+
alphabet_size: Token vocabulary.
|
197 |
+
pad_token_id: ID of pad token.
|
198 |
+
mask_token_id: ID of mask token.
|
199 |
+
max_positions: Maximum sequence length.
|
200 |
+
embed_scale: Correction ratio applied to the embeddings to make up for the
|
201 |
+
norm difference between the input during training and inference.
|
202 |
+
emb_layer_norm_before: Whether to use layer norm before the first attention
|
203 |
+
layer.
|
204 |
+
attention_heads: Number of attention heads.
|
205 |
+
key_size: The dimension of the query, key, and values within each attention
|
206 |
+
head, if not specified, it is set to attention_heads//embed_dim.
|
207 |
+
It can be useful to set a custom key size if we want to impose the size of
|
208 |
+
the query, key and value tensor ( for example, tensors shaped with
|
209 |
+
power of 2 are more efficiently handled on TPUs ).
|
210 |
+
Note: Parametrizing the model with a custom key size has been done in :
|
211 |
+
Brown, Tom, et al. "Language models are few-shot learners."
|
212 |
+
Advances in neural information processing systems 33 (2020): 1877-1901.
|
213 |
+
embed_dim: Embedding dimension.
|
214 |
+
ffn_embed_dim: Feed forward embedding dimension.
|
215 |
+
num_layers: Number of attention blocks.
|
216 |
+
positional_embedding: Type of positional embedding to use before the first
|
217 |
+
attention layer. Options: "learned", "learned_standard" "sinusoidal" or
|
218 |
+
None.
|
219 |
+
NOTE: "learned" is the positional embedding of ESM, and "learned_standard"
|
220 |
+
is a more standard one, used for example in DNAbert.
|
221 |
+
lm_head: type of language model head. Options: "simple", "roberta" or None.
|
222 |
+
add_bias_kv: Add bias in attention layer.
|
223 |
+
add_bias_ffn: Add bias in feed forward network block.
|
224 |
+
use_rotary_embedding: Whether to use rotary embeddings. Requires:
|
225 |
+
positional_embeddings = None.
|
226 |
+
rescaling_factor: Scaling factor to use for rotary embeddings.
|
227 |
+
ffn_activation_name: Activation function to be used in FFN block. Supported
|
228 |
+
names are "gelu", "relu", "swish".
|
229 |
+
use_glu_in_ffn: Whether to use Gated Linear Unit (GLU) in Feed
|
230 |
+
Forward Network (FFN) block. To do a swiGLU (gated-swish) put this arg
|
231 |
+
to True and use swish as ffn_activation_name.
|
232 |
+
Same principle for a gated-relu. To keep the same number of parameters in
|
233 |
+
the FFN block, one should multiply by 2/3 the ffn_embed_dim when using GLU.
|
234 |
+
See https://arxiv.org/pdf/2002.05202.pdf for more details.
|
235 |
+
mask_before_attention: Use mask before attention layers.
|
236 |
+
layer_norm_eps: the eps factor in the different layer norms of the model (refer
|
237 |
+
to layer norm implementation)
|
238 |
+
token_dropout: Token dropout.
|
239 |
+
masking_ratio: Masking ratio (used if token dropout is enabled).
|
240 |
+
masking_prob: Masking probability (used if token dropout is enabled).
|
241 |
+
use_gradient_checkpointing: Whether to use gradient checkpointing (checkpoint
|
242 |
+
gradients in the forward pass to reduce the computation in the backward).
|
243 |
+
"""
|
244 |
+
|
245 |
+
alphabet_size: int
|
246 |
+
pad_token_id: int
|
247 |
+
mask_token_id: int
|
248 |
+
|
249 |
+
max_positions: int = 1024
|
250 |
+
embed_scale: float = 1.0
|
251 |
+
|
252 |
+
# architecture
|
253 |
+
emb_layer_norm_before: bool = False
|
254 |
+
attention_heads: int = 20
|
255 |
+
key_size: Optional[int] = None
|
256 |
+
embed_dim: int = 1280
|
257 |
+
ffn_embed_dim: int = 5120
|
258 |
+
num_layers: int = 24
|
259 |
+
positional_embedding: Optional[str] = "learned"
|
260 |
+
lm_head: Optional[str] = "simple"
|
261 |
+
add_bias_kv: bool = False
|
262 |
+
add_bias_ffn: bool = True
|
263 |
+
use_rotary_embedding: bool = False
|
264 |
+
rescaling_factor: Optional[float] = None
|
265 |
+
ffn_activation_name: str = "gelu-no-approx"
|
266 |
+
use_glu_in_ffn: bool = False
|
267 |
+
mask_before_attention: bool = False
|
268 |
+
layer_norm_eps: float = 1e-5
|
269 |
+
pre_layer_norm: bool = True
|
270 |
+
bias_word_embedding: bool = False
|
271 |
+
|
272 |
+
# dropout
|
273 |
+
token_dropout: bool = False
|
274 |
+
masking_ratio: float = 0.1
|
275 |
+
masking_prob: float = 0.8
|
276 |
+
|
277 |
+
# logging
|
278 |
+
use_gradient_checkpointing: bool = False
|
279 |
+
|
280 |
+
# return
|
281 |
+
embeddings_layers_to_save: List[int] = field(default_factory=list)
|
282 |
+
attention_maps_to_save: List[Tuple[int, int]] = field(default_factory=list)
|
283 |
+
|
284 |
+
def __post_init__(self) -> None:
|
285 |
+
"""
|
286 |
+
Checks that the given values are compatible.
|
287 |
+
"""
|
288 |
+
|
289 |
+
if self.key_size is None:
|
290 |
+
if not self.embed_dim % self.attention_heads == 0:
|
291 |
+
raise ValueError(
|
292 |
+
f"When no key size is provided, the embedding dimension should be "
|
293 |
+
f"divisible by the number of heads, however provided embedding "
|
294 |
+
f"dimension is {self.embed_dim} and the number of heads is "
|
295 |
+
f"{self.attention_heads}."
|
296 |
+
)
|
297 |
+
self.key_size = self.embed_dim // self.attention_heads
|
298 |
+
if self.positional_embedding is not None:
|
299 |
+
if type(self.positional_embedding) != str:
|
300 |
+
raise TypeError
|
301 |
+
|
302 |
+
if self.positional_embedding not in [
|
303 |
+
"learned",
|
304 |
+
"sinusoidal",
|
305 |
+
"learned_standard",
|
306 |
+
"alibi_dnabert_2",
|
307 |
+
]:
|
308 |
+
raise ValueError(
|
309 |
+
"The positional_embedding argument should either be None,"
|
310 |
+
"`learned`, `sinusoidal`, 'learned_standard' or 'alibi_dnabert_2'."
|
311 |
+
)
|
312 |
+
if self.lm_head is not None:
|
313 |
+
if type(self.lm_head) != str:
|
314 |
+
raise TypeError
|
315 |
+
|
316 |
+
if self.lm_head not in ["simple", "roberta"]:
|
317 |
+
raise ValueError(
|
318 |
+
"The lm_head argument should either be None,"
|
319 |
+
"`simple` or `roberta`."
|
320 |
+
)
|
321 |
+
|
322 |
+
if self.use_rotary_embedding and self.positional_embedding is not None:
|
323 |
+
raise ValueError(
|
324 |
+
"When using rotary embedding, positional_embedding must be set to none"
|
325 |
+
)
|
326 |
+
|
327 |
+
if self.add_bias_kv and self.use_rotary_embedding:
|
328 |
+
raise ValueError(
|
329 |
+
"Biases on key and values are not compatible with Rotary embeddings."
|
330 |
+
)
|
331 |
+
|
332 |
+
if self.positional_embedding == "alibi_dnabert_2":
|
333 |
+
assert not self.add_bias_kv
|
334 |
+
|
335 |
+
|
336 |
+
@dataclass
|
337 |
+
class ChatNTConfig(PretrainedConfig):
|
338 |
+
model_type = "ChatNT"
|
339 |
+
|
340 |
+
def __init__(self, **kwargs): # type: ignore
|
341 |
+
self.gpt_config: GptConfig = kwargs.get("gpt_config", GptConfig(32000, 3))
|
342 |
+
self.nt_config: NucleotideTransformerConfig = kwargs.get(
|
343 |
+
"nt_config", NucleotideTransformerConfig(4000, 1, 4)
|
344 |
+
)
|
345 |
+
self.perceiver_resampler_config: PerceiverResamplerConfig = kwargs.get(
|
346 |
+
"perceiver_resampler_config", PerceiverResamplerConfig()
|
347 |
+
)
|
348 |
+
self.seq_token_id: int = kwargs.get("seq_token_id", 32000)
|
349 |
+
self.bio_pad_token_id: int = kwargs.get("bio_pad_token_id", 1)
|
350 |
+
self.english_pad_token_id: int = kwargs.get("english_pad_token_id", 2)
|
351 |
+
super().__init__(**kwargs)
|
352 |
+
|
353 |
+
def to_dict(self): # type: ignore
|
354 |
+
output = super().to_dict()
|
355 |
+
|
356 |
+
def serialize(obj): # type: ignore
|
357 |
+
return obj.to_dict() if hasattr(obj, "to_dict") else vars(obj)
|
358 |
+
|
359 |
+
output["gpt_config"] = serialize(self.gpt_config) # type: ignore
|
360 |
+
output["nt_config"] = serialize(self.nt_config) # type: ignore
|
361 |
+
output["perceiver_resampler_config"] = serialize( # type: ignore
|
362 |
+
self.perceiver_resampler_config
|
363 |
+
)
|
364 |
+
return output
|
365 |
+
|
366 |
+
|
367 |
+
class TorchBioBrainDecoder(nn.Module):
|
368 |
+
def __init__(
|
369 |
+
self,
|
370 |
+
gpt_config: GptConfig,
|
371 |
+
seq_token_id: int,
|
372 |
+
):
|
373 |
+
"""
|
374 |
+
Initializes the BioBrain decoder, using a GPT model for text generation with
|
375 |
+
bio embeddings.
|
376 |
+
|
377 |
+
Args:
|
378 |
+
gpt_config: Configuration for the GPT model
|
379 |
+
seq_token_id: Index of the SEQ token
|
380 |
+
"""
|
381 |
+
super(TorchBioBrainDecoder, self).__init__()
|
382 |
+
self.gpt_config = gpt_config
|
383 |
+
self.seq_token_id = seq_token_id
|
384 |
+
|
385 |
+
# Initialize the GPT model (assumed you have it already in PyTorch)
|
386 |
+
self.gpt_model = TorchGptDecoder(self.gpt_config)
|
387 |
+
|
388 |
+
def forward(
|
389 |
+
self, english_token_ids: torch.Tensor, projected_bio_embeddings: torch.Tensor
|
390 |
+
) -> torch.Tensor:
|
391 |
+
"""
|
392 |
+
Forward pass through the model.
|
393 |
+
|
394 |
+
Args:
|
395 |
+
english_token_ids: Tensor of English token IDs with shape
|
396 |
+
(batch_size, num_english_tokens).
|
397 |
+
projected_bio_embeddings: Optional tensor of bio embeddings with shape
|
398 |
+
(batch_size, num_bio_sequences, ?, embed_dim).
|
399 |
+
|
400 |
+
Returns:
|
401 |
+
torch.Tensor: The logits from the GPT model,
|
402 |
+
shaped (batch_size, num_english_tokens, vocab_size).
|
403 |
+
"""
|
404 |
+
|
405 |
+
# Compute English token embeddings
|
406 |
+
tokens_embeddings = self.gpt_model.token_embed(english_token_ids)
|
407 |
+
|
408 |
+
if projected_bio_embeddings is not None:
|
409 |
+
(
|
410 |
+
batch_size,
|
411 |
+
num_bio_sequences,
|
412 |
+
_,
|
413 |
+
bio_embed_dim,
|
414 |
+
) = projected_bio_embeddings.shape
|
415 |
+
|
416 |
+
# Insert the bio embeddings at the SEQ token positions
|
417 |
+
processed_tokens_ids = english_token_ids.clone()
|
418 |
+
for bio_seq_num in range(num_bio_sequences):
|
419 |
+
tokens_embeddings, processed_tokens_ids = self.insert_embeddings(
|
420 |
+
processed_tokens_ids,
|
421 |
+
tokens_embeddings,
|
422 |
+
projected_bio_embeddings[:, bio_seq_num, :, :],
|
423 |
+
bio_seq_num=bio_seq_num,
|
424 |
+
)
|
425 |
+
|
426 |
+
# Regular GPT pass through
|
427 |
+
embeddings = self.gpt_model.apply_transformer_layers(tokens_embeddings)
|
428 |
+
embeddings = self.gpt_model.final_norm(embeddings)
|
429 |
+
|
430 |
+
# Compute logits
|
431 |
+
logits = self.gpt_model.lm_head(embeddings)
|
432 |
+
|
433 |
+
if projected_bio_embeddings is not None:
|
434 |
+
# Clean logits sequentially
|
435 |
+
processed_tokens_ids = english_token_ids.clone()
|
436 |
+
resampled_length = projected_bio_embeddings.shape[-2]
|
437 |
+
for _ in range(num_bio_sequences):
|
438 |
+
logits, processed_tokens_ids = self.cleanup_logits(
|
439 |
+
tokens=processed_tokens_ids,
|
440 |
+
logits=logits,
|
441 |
+
resampled_length=resampled_length,
|
442 |
+
)
|
443 |
+
|
444 |
+
return logits
|
445 |
+
|
446 |
+
def insert_embeddings(
|
447 |
+
self,
|
448 |
+
tokens: torch.Tensor,
|
449 |
+
input_embeddings: torch.Tensor,
|
450 |
+
resampled_embeddings: torch.Tensor,
|
451 |
+
bio_seq_num: int,
|
452 |
+
) -> Tuple[torch.Tensor, torch.Tensor]:
|
453 |
+
"""
|
454 |
+
Inserts resampled embeddings in input_embeddings, starting at the SEQ token
|
455 |
+
|
456 |
+
Args:
|
457 |
+
tokens (torch.Tensor): Shape (batch_size, num_tokens)
|
458 |
+
input_embeddings (torch.Tensor): Shape (batch_size, num_tokens, embed_dim)
|
459 |
+
resampled_embeddings (torch.Tensor):
|
460 |
+
Shape (batch_size, num_bio_sequences, bio_sequence_length, embed_dim)
|
461 |
+
|
462 |
+
Returns:
|
463 |
+
Tuple[torch.Tensor, torch.Tensor]:
|
464 |
+
- input_embeddings with resampled_embeddings inserted at the SEQ token
|
465 |
+
- tokens with the SEQ token set to -1
|
466 |
+
"""
|
467 |
+
|
468 |
+
def _insert(
|
469 |
+
tokens_1d: torch.Tensor,
|
470 |
+
input_embeddings_1d: torch.Tensor,
|
471 |
+
resampled_embeddings_1d: torch.Tensor,
|
472 |
+
) -> Tuple[torch.Tensor, torch.Tensor]:
|
473 |
+
"""
|
474 |
+
Args:
|
475 |
+
tokens (torch.Tensor): Shape (num_tokens,)
|
476 |
+
input_embeddings (torch.Tensor): Shape (num_tokens, embed_dim,)
|
477 |
+
resampled_embeddings (torch.Tensor):
|
478 |
+
Shape (bio_sequence_length, embed_dim,)
|
479 |
+
"""
|
480 |
+
indices = torch.where(tokens_1d == self.seq_token_id)[0]
|
481 |
+
if indices.numel() > 0:
|
482 |
+
idx = indices[0].item()
|
483 |
+
insertion_pos = idx + resampled_embeddings_1d.shape[-2] * bio_seq_num
|
484 |
+
x = torch.cat(
|
485 |
+
[
|
486 |
+
input_embeddings_1d[:insertion_pos, :],
|
487 |
+
resampled_embeddings_1d,
|
488 |
+
input_embeddings_1d[insertion_pos:, :],
|
489 |
+
],
|
490 |
+
dim=0,
|
491 |
+
)[: tokens_1d.shape[0] + 1, :]
|
492 |
+
x = torch.roll(torch.roll(x, shifts=-idx, dims=0), shifts=idx, dims=0)[
|
493 |
+
:-1, :
|
494 |
+
]
|
495 |
+
tokens_1d[idx] = -1
|
496 |
+
return x, tokens_1d
|
497 |
+
else:
|
498 |
+
return (
|
499 |
+
input_embeddings,
|
500 |
+
tokens_1d,
|
501 |
+
) # Return unchanged if seq_token_id is not found
|
502 |
+
|
503 |
+
tokens_acc = []
|
504 |
+
embeddings_acc = []
|
505 |
+
|
506 |
+
for i in range(tokens.shape[0]):
|
507 |
+
embeddings_out, tokens_out = _insert(
|
508 |
+
tokens[i].clone(),
|
509 |
+
input_embeddings[i].clone(),
|
510 |
+
resampled_embeddings[i].clone(),
|
511 |
+
)
|
512 |
+
tokens_acc.append(tokens_out)
|
513 |
+
embeddings_acc.append(embeddings_out)
|
514 |
+
tokens_acc = torch.stack(tokens_acc)
|
515 |
+
embeddings_acc = torch.stack(embeddings_acc)
|
516 |
+
|
517 |
+
return embeddings_acc, tokens_acc
|
518 |
+
|
519 |
+
def cleanup_logits(
|
520 |
+
self, tokens: torch.Tensor, logits: torch.Tensor, resampled_length: int
|
521 |
+
) -> Tuple[torch.Tensor, torch.Tensor]:
|
522 |
+
"""
|
523 |
+
Removes the logits corresponding to the unused embeddings.
|
524 |
+
|
525 |
+
Args:
|
526 |
+
tokens: Input english tokens.
|
527 |
+
logits: Input logits.
|
528 |
+
|
529 |
+
Returns:
|
530 |
+
Cleaned logits, last values will be equal to 0.
|
531 |
+
"""
|
532 |
+
|
533 |
+
def _clean(
|
534 |
+
token: torch.Tensor, logit: torch.Tensor
|
535 |
+
) -> Tuple[torch.Tensor, torch.Tensor]:
|
536 |
+
indices = torch.where(token == self.seq_token_id)[0]
|
537 |
+
if indices.numel() > 0:
|
538 |
+
idx = indices[0].item()
|
539 |
+
|
540 |
+
mask_idx = (
|
541 |
+
torch.arange(logit.shape[0] - resampled_length, device=logit.device)
|
542 |
+
> idx
|
543 |
+
)
|
544 |
+
mask_idx = mask_idx.unsqueeze(1)
|
545 |
+
|
546 |
+
# Remove values corresponding to bio tokens
|
547 |
+
logit = (
|
548 |
+
logit[:-resampled_length] * (~mask_idx)
|
549 |
+
+ logit[resampled_length:] * mask_idx
|
550 |
+
)
|
551 |
+
|
552 |
+
# Append zeros at the end
|
553 |
+
logit = torch.cat(
|
554 |
+
(
|
555 |
+
logit,
|
556 |
+
torch.zeros(
|
557 |
+
(resampled_length, logit.shape[1]),
|
558 |
+
dtype=logit.dtype,
|
559 |
+
device=logit.device,
|
560 |
+
),
|
561 |
+
)
|
562 |
+
)
|
563 |
+
|
564 |
+
# Update token
|
565 |
+
token[idx] = -1
|
566 |
+
|
567 |
+
return logit, token
|
568 |
+
|
569 |
+
else:
|
570 |
+
return logit, token
|
571 |
+
|
572 |
+
tokens_acc = []
|
573 |
+
logits_acc = []
|
574 |
+
|
575 |
+
for i in range(tokens.shape[0]):
|
576 |
+
logits_out, tokens_out = _clean(tokens[i].clone(), logits[i].clone())
|
577 |
+
tokens_acc.append(tokens_out)
|
578 |
+
logits_acc.append(logits_out)
|
579 |
+
tokens_acc = torch.stack(tokens_acc)
|
580 |
+
logits_acc = torch.stack(logits_acc)
|
581 |
+
|
582 |
+
return logits_acc, tokens_acc
|
583 |
+
|
584 |
+
|
585 |
+
class TorchMultiOmicsModel(PreTrainedModel):
|
586 |
+
config_class = ChatNTConfig
|
587 |
+
|
588 |
+
def __init__(self, config: ChatNTConfig) -> None:
|
589 |
+
if isinstance(config, dict):
|
590 |
+
# If config is a dictionary instead of ChatNTConfig (which can happen
|
591 |
+
# depending how the config was saved), we convert it to the config
|
592 |
+
config["gpt_config"]["rope_config"] = RotaryEmbeddingConfig(
|
593 |
+
**config["gpt_config"]["rope_config"]
|
594 |
+
)
|
595 |
+
config["gpt_config"] = GptConfig(**config["gpt_config"])
|
596 |
+
config["nt_config"] = NucleotideTransformerConfig(**config["nt_config"])
|
597 |
+
config["perceiver_resampler_config"] = PerceiverResamplerConfig(
|
598 |
+
**config["perceiver_resampler_config"]
|
599 |
+
)
|
600 |
+
config = ChatNTConfig(**config) # type: ignore
|
601 |
+
|
602 |
+
else:
|
603 |
+
if isinstance(config.gpt_config, dict):
|
604 |
+
config.gpt_config["rope_config"] = RotaryEmbeddingConfig(
|
605 |
+
**config.gpt_config["rope_config"]
|
606 |
+
)
|
607 |
+
config.gpt_config = GptConfig(**config.gpt_config)
|
608 |
+
|
609 |
+
if isinstance(config.nt_config, dict):
|
610 |
+
config.nt_config = NucleotideTransformerConfig(**config.nt_config)
|
611 |
+
|
612 |
+
if isinstance(config.perceiver_resampler_config, dict):
|
613 |
+
config.perceiver_resampler_config = PerceiverResamplerConfig(
|
614 |
+
**config.perceiver_resampler_config
|
615 |
+
)
|
616 |
+
|
617 |
+
super().__init__(config=config)
|
618 |
+
self.gpt_config = config.gpt_config
|
619 |
+
self.nt_config = config.nt_config
|
620 |
+
self.perceiver_resampler_config = config.perceiver_resampler_config
|
621 |
+
self.seq_token_id = config.seq_token_id
|
622 |
+
self.bio_pad_token_id = config.bio_pad_token_id
|
623 |
+
self.english_pad_token_id = config.english_pad_token_id
|
624 |
+
|
625 |
+
# Correct seq_token_id
|
626 |
+
self.seq_token_id -= 1
|
627 |
+
|
628 |
+
self.biobrain_encoder = TorchBioBrainEncoder(nt_config=self.nt_config)
|
629 |
+
self.biobrain_decoder = TorchBioBrainDecoder(
|
630 |
+
gpt_config=self.gpt_config, seq_token_id=self.seq_token_id
|
631 |
+
)
|
632 |
+
self.projection_model = TorchMultiModalPerceiverResamplerProjection(
|
633 |
+
perceiver_resampler_config=self.perceiver_resampler_config,
|
634 |
+
input_embed_dim=self.nt_config.embed_dim,
|
635 |
+
embed_dim=self.gpt_config.embed_dim,
|
636 |
+
english_vocab_size=self.gpt_config.vocab_size,
|
637 |
+
bio_pad_token_id=self.bio_pad_token_id,
|
638 |
+
english_pad_token_id=self.english_pad_token_id,
|
639 |
+
)
|
640 |
+
|
641 |
+
def forward(
|
642 |
+
self,
|
643 |
+
multi_omics_tokens_ids: tuple[torch.Tensor, torch.Tensor],
|
644 |
+
projection_english_tokens_ids: torch.Tensor,
|
645 |
+
projected_bio_embeddings: torch.Tensor = None,
|
646 |
+
) -> dict[str, torch.Tensor]:
|
647 |
+
"""
|
648 |
+
|
649 |
+
Args:
|
650 |
+
multi_omics_tokens_ids (Tuple[torch.Tensor, torch.Tensor]):
|
651 |
+
english_tokens_ids: Represents the prompt tokens (english tokens)
|
652 |
+
Shape (batch_size, num_english_tokens)
|
653 |
+
|
654 |
+
bio_tokens_ids: Represents the bio sequences tokens
|
655 |
+
Shape (batch_size, num_bio_sequences, num_bio_tokens)
|
656 |
+
|
657 |
+
projection_english_tokens_ids (torch.Tensor):
|
658 |
+
Shape (batch_size, num_english_tokens)
|
659 |
+
|
660 |
+
projected_bio_embeddings (projected_bio_embeddings, optional):
|
661 |
+
Shape (batch_size, num_bio_sequencse, ?, embed_dim).
|
662 |
+
Defaults to None.
|
663 |
+
|
664 |
+
Returns:
|
665 |
+
dict[str, torch.Tensor] containing:
|
666 |
+
- logits:
|
667 |
+
Shape (batch_size, num_tokens, vocab_size)
|
668 |
+
|
669 |
+
- projected_bio_embeddings:
|
670 |
+
Shape (batch_size, num_bio_sequences, ?, embed_dim)
|
671 |
+
"""
|
672 |
+
english_token_ids, bio_token_ids = multi_omics_tokens_ids
|
673 |
+
english_token_ids = english_token_ids.clone()
|
674 |
+
bio_token_ids = bio_token_ids.clone()
|
675 |
+
projection_english_tokens_ids = projection_english_tokens_ids.clone()
|
676 |
+
if projected_bio_embeddings is not None:
|
677 |
+
projected_bio_embeddings = projected_bio_embeddings.clone()
|
678 |
+
|
679 |
+
# Replace config.vocab_size value in english tokens
|
680 |
+
# We do this because the default vocab size (32000) doesn't match with the
|
681 |
+
# number of tokens because of seq_token_id(=32000) that was added
|
682 |
+
# Therefore, we will put seq_token_id to 31999
|
683 |
+
# (I will also put token n°31999 to 0, which is for unknown token)
|
684 |
+
# This is a workaround to avoid having to change the vocab size in the config
|
685 |
+
vocab_size = self.gpt_config.vocab_size
|
686 |
+
# Replace vocab
|
687 |
+
english_token_ids[english_token_ids == vocab_size - 1] = 0
|
688 |
+
projection_english_tokens_ids[
|
689 |
+
projection_english_tokens_ids == vocab_size - 1
|
690 |
+
] = 0
|
691 |
+
english_token_ids[english_token_ids == vocab_size] = vocab_size - 1
|
692 |
+
projection_english_tokens_ids[projection_english_tokens_ids == vocab_size] = (
|
693 |
+
vocab_size - 1
|
694 |
+
)
|
695 |
+
|
696 |
+
if bio_token_ids is None:
|
697 |
+
projected_bio_embeddings = None
|
698 |
+
else:
|
699 |
+
num_bio_sequences = bio_token_ids.shape[1]
|
700 |
+
|
701 |
+
if projected_bio_embeddings is None:
|
702 |
+
# Compute bio sequences embeddings
|
703 |
+
bio_embeddings_list = [
|
704 |
+
self.biobrain_encoder(bio_token_ids=bio_token_ids[:, bio_seq_num])
|
705 |
+
for bio_seq_num in range(num_bio_sequences)
|
706 |
+
]
|
707 |
+
|
708 |
+
# Project these embeddings
|
709 |
+
projected_bio_embeddings = [
|
710 |
+
self.projection_model(
|
711 |
+
bio_token_ids=bio_token_ids[:, bio_seq_num],
|
712 |
+
bio_embeddings=bio_embeddings,
|
713 |
+
english_token_ids=projection_english_tokens_ids,
|
714 |
+
)
|
715 |
+
for bio_seq_num, bio_embeddings in enumerate(bio_embeddings_list)
|
716 |
+
]
|
717 |
+
projected_bio_embeddings = torch.stack(projected_bio_embeddings, dim=1)
|
718 |
+
|
719 |
+
# decode
|
720 |
+
logits = self.biobrain_decoder(
|
721 |
+
english_token_ids=english_token_ids,
|
722 |
+
projected_bio_embeddings=projected_bio_embeddings,
|
723 |
+
)
|
724 |
+
|
725 |
+
outs = {"logits": logits, "projected_bio_embeddings": projected_bio_embeddings}
|
726 |
+
|
727 |
+
return outs
|
728 |
+
|
729 |
+
|
730 |
+
class TorchRotaryEmbedding(torch.nn.Module):
|
731 |
+
def __init__(self, config: RotaryEmbeddingConfig):
|
732 |
+
super().__init__()
|
733 |
+
|
734 |
+
self.max_seq_len = config.max_seq_len
|
735 |
+
self.dim = config.dim
|
736 |
+
self.theta = config.theta
|
737 |
+
self.sincos_cache = None
|
738 |
+
|
739 |
+
def _create_sinusoidal_positions(self, device: torch.device) -> torch.Tensor:
|
740 |
+
"""
|
741 |
+
Create the sines and cosines for the RoPE.
|
742 |
+
|
743 |
+
Returns:
|
744 |
+
Sinusoidal positions of shape (self.max_seq_len, self.dim).
|
745 |
+
"""
|
746 |
+
# Create the inverse frequency based on theta and dim
|
747 |
+
inv_freq = 1.0 / (
|
748 |
+
self.theta
|
749 |
+
** (torch.arange(0, self.dim, 2, device=device).float() / self.dim)
|
750 |
+
)
|
751 |
+
|
752 |
+
# Compute sinusoidal input using the broadcasting
|
753 |
+
sinusoid_inp = torch.einsum(
|
754 |
+
"i,j->ij", torch.arange(self.max_seq_len, device=device).float(), inv_freq
|
755 |
+
)
|
756 |
+
|
757 |
+
# Apply sin and cos to the sinusoidal input
|
758 |
+
sin, cos = sinusoid_inp.sin(), sinusoid_inp.cos()
|
759 |
+
|
760 |
+
# Allocate a tensor for the final sin-cos values
|
761 |
+
sincos = torch.zeros(
|
762 |
+
(self.max_seq_len, self.dim), dtype=torch.float32, device=device
|
763 |
+
)
|
764 |
+
|
765 |
+
# Fill the sincos tensor with sin and cos values
|
766 |
+
sentinel = self.dim // 2 + self.dim % 2
|
767 |
+
sincos[:, :sentinel] = sin
|
768 |
+
sincos[:, sentinel:] = cos
|
769 |
+
|
770 |
+
return sincos
|
771 |
+
|
772 |
+
def _rotate_every_two(self, x: torch.Tensor) -> torch.Tensor:
|
773 |
+
"""
|
774 |
+
Prepare a tensor to apply the RoPE mechanism.
|
775 |
+
|
776 |
+
Args:
|
777 |
+
x: Tensor of shape (batch_size, seq_len, num_heads, head_dim),
|
778 |
+
typically this is the key or query tensor.
|
779 |
+
|
780 |
+
Returns:
|
781 |
+
The even indices in the last dimension have their sign flipped.
|
782 |
+
Tensor of shape (batch_size, seq_len, num_heads, head_dim).
|
783 |
+
"""
|
784 |
+
# Split the tensor into two halves (odd and even indexed dimensions)
|
785 |
+
rotate_half = torch.stack((-x[..., 1::2], x[..., ::2]), dim=-1)
|
786 |
+
|
787 |
+
# Reshape the tensor to the original shape
|
788 |
+
rotate_half = rotate_half.view(rotate_half.shape[:-2] + (-1,))
|
789 |
+
return rotate_half
|
790 |
+
|
791 |
+
def _apply_rotary_pos_emb(
|
792 |
+
self, x: torch.Tensor, sincos: torch.Tensor
|
793 |
+
) -> torch.Tensor:
|
794 |
+
"""
|
795 |
+
Applies rotary embeddings to x.
|
796 |
+
|
797 |
+
Args:
|
798 |
+
x: Tensor of shape (batch_size, seq_len, num_heads, head_dim),
|
799 |
+
typically this is the key or query tensor.
|
800 |
+
sincos: Tuple of sine and cosine tensors for position encoding.
|
801 |
+
|
802 |
+
Returns:
|
803 |
+
RoPE embeddings tensor.
|
804 |
+
"""
|
805 |
+
sin_pos, cos_pos = sincos
|
806 |
+
|
807 |
+
# Reshape the sin and cos tensors for broadcasting
|
808 |
+
sin_pos = torch.repeat_interleave(sin_pos.unsqueeze(2), repeats=2, dim=-1)
|
809 |
+
cos_pos = torch.repeat_interleave(cos_pos.unsqueeze(2), repeats=2, dim=-1)
|
810 |
+
|
811 |
+
# Apply the rotary embedding mechanism
|
812 |
+
return (x * cos_pos) + (self._rotate_every_two(x) * sin_pos)
|
813 |
+
|
814 |
+
def __call__(
|
815 |
+
self, k: torch.Tensor, q: torch.Tensor, positions: Optional[torch.Tensor] = None
|
816 |
+
) -> tuple[torch.Tensor, torch.Tensor]:
|
817 |
+
"""
|
818 |
+
Applies rotary embeddings to k and q.
|
819 |
+
|
820 |
+
Args:
|
821 |
+
k: key tensor of shape (batch_size, seq_len, num_heads, head_dim),
|
822 |
+
q: value tensor of shape (batch_size, seq_len, num_heads, head_dim),
|
823 |
+
positions: optional positions offset useful when caching,
|
824 |
+
|
825 |
+
Returns:
|
826 |
+
RoPE embeddings for the keys and values.
|
827 |
+
"""
|
828 |
+
if self.sincos_cache is None:
|
829 |
+
device = k.device
|
830 |
+
self.sincos_cache = self._create_sinusoidal_positions(device=device)
|
831 |
+
|
832 |
+
batch_size, seq_len, num_heads, head_dim = k.shape
|
833 |
+
|
834 |
+
# Generate position ids
|
835 |
+
position_ids = (
|
836 |
+
torch.arange(seq_len, device=k.device).unsqueeze(0).expand(batch_size, -1)
|
837 |
+
)
|
838 |
+
|
839 |
+
if positions is not None:
|
840 |
+
position_ids += positions
|
841 |
+
|
842 |
+
# Retrieve sincos values using the position_ids
|
843 |
+
sincos = self.sincos_cache[position_ids] # type: ignore
|
844 |
+
|
845 |
+
# Split sincos into sin_pos and cos_pos
|
846 |
+
sincos = torch.chunk(sincos, 2, dim=-1)
|
847 |
+
|
848 |
+
# Apply rotary position embedding to key (k) and query (q)
|
849 |
+
k_rot = self._apply_rotary_pos_emb(k[..., : self.dim], sincos)
|
850 |
+
k_pass = k[..., self.dim :]
|
851 |
+
|
852 |
+
q_rot = self._apply_rotary_pos_emb(q[..., : self.dim], sincos)
|
853 |
+
q_pass = q[..., self.dim :]
|
854 |
+
|
855 |
+
# Concatenate the rotated and non-rotated parts
|
856 |
+
keys = torch.cat([k_rot, k_pass], dim=-1)
|
857 |
+
values = torch.cat([q_rot, q_pass], dim=-1)
|
858 |
+
|
859 |
+
return keys, values
|
860 |
+
|
861 |
+
|
862 |
+
class TorchGptGroupedQueryAttention(nn.Module):
|
863 |
+
def __init__(
|
864 |
+
self,
|
865 |
+
embed_dim: int,
|
866 |
+
num_heads: int,
|
867 |
+
rope_config: RotaryEmbeddingConfig,
|
868 |
+
num_kv_heads: int = None, # type: ignore
|
869 |
+
head_dim: int = None, # type: ignore
|
870 |
+
add_bias_attn: bool = False, # type: ignore
|
871 |
+
) -> None:
|
872 |
+
super().__init__()
|
873 |
+
self.num_heads = num_heads
|
874 |
+
self.num_kv_heads = num_kv_heads or num_heads
|
875 |
+
self.embed_dim = embed_dim
|
876 |
+
self.head_dim = head_dim or (embed_dim // num_heads)
|
877 |
+
self.add_bias_attn = add_bias_attn
|
878 |
+
self.rope = TorchRotaryEmbedding(rope_config)
|
879 |
+
|
880 |
+
self.query_linear = nn.Linear(
|
881 |
+
embed_dim, self.num_heads * self.head_dim, bias=add_bias_attn
|
882 |
+
)
|
883 |
+
self.key_linear = nn.Linear(
|
884 |
+
embed_dim, self.num_kv_heads * self.head_dim, bias=add_bias_attn
|
885 |
+
)
|
886 |
+
self.value_linear = nn.Linear(
|
887 |
+
embed_dim, self.num_kv_heads * self.head_dim, bias=add_bias_attn
|
888 |
+
)
|
889 |
+
self.out_linear = nn.Linear(
|
890 |
+
self.num_heads * self.head_dim, embed_dim, bias=add_bias_attn
|
891 |
+
)
|
892 |
+
|
893 |
+
def forward(
|
894 |
+
self,
|
895 |
+
query_inputs: torch.Tensor,
|
896 |
+
key_inputs: torch.Tensor,
|
897 |
+
value_inputs: torch.Tensor,
|
898 |
+
attention_mask: torch.Tensor = None,
|
899 |
+
) -> torch.Tensor:
|
900 |
+
batch_size, seq_len, _ = query_inputs.shape
|
901 |
+
|
902 |
+
queries = self.query_linear(query_inputs).view( # noqa
|
903 |
+
batch_size, seq_len, self.num_heads, self.head_dim
|
904 |
+
)
|
905 |
+
keys = self.key_linear(key_inputs).view( # noqa
|
906 |
+
batch_size, seq_len, self.num_kv_heads, self.head_dim
|
907 |
+
)
|
908 |
+
values = self.value_linear(value_inputs).view( # noqa
|
909 |
+
batch_size, seq_len, self.num_kv_heads, self.head_dim
|
910 |
+
)
|
911 |
+
|
912 |
+
keys, queries = self.rope(keys, queries)
|
913 |
+
|
914 |
+
n_rep = self.num_heads // self.num_kv_heads
|
915 |
+
keys = keys.repeat_interleave(n_rep, dim=2)
|
916 |
+
values = values.repeat_interleave(n_rep, dim=2)
|
917 |
+
|
918 |
+
attention_logits = torch.einsum("bthd,bThd->bhtT", queries, keys) / (
|
919 |
+
self.head_dim**0.5
|
920 |
+
)
|
921 |
+
|
922 |
+
if attention_mask is not None:
|
923 |
+
attention_logits = attention_logits.masked_fill(
|
924 |
+
attention_mask == 0, float("-inf")
|
925 |
+
)
|
926 |
+
|
927 |
+
attention_weights = nn.functional.softmax(attention_logits, dim=-1)
|
928 |
+
|
929 |
+
values = torch.einsum("bhtT,bThd->bthd", attention_weights, values)
|
930 |
+
values = values.contiguous().view(batch_size, seq_len, -1)
|
931 |
+
|
932 |
+
return self.out_linear(values)
|
933 |
+
|
934 |
+
|
935 |
+
class TorchGptDecoder(nn.Module):
|
936 |
+
def __init__(self, config: GptConfig, name: Optional[str] = None):
|
937 |
+
super().__init__()
|
938 |
+
self.config = config
|
939 |
+
|
940 |
+
self.token_embed = nn.Embedding(config.vocab_size, config.embed_dim)
|
941 |
+
|
942 |
+
if config.norm_type == "layer_norm":
|
943 |
+
self.final_norm = nn.LayerNorm(config.embed_dim)
|
944 |
+
elif config.norm_type == "RMS_norm":
|
945 |
+
self.final_norm = TorchRMSNorm(config.embed_dim, eps=config.rms_norm_eps)
|
946 |
+
else:
|
947 |
+
raise ValueError(f"unrecognized norm_type in config {config.norm_type}")
|
948 |
+
|
949 |
+
self.layers = nn.ModuleList(
|
950 |
+
[
|
951 |
+
TorchGptDecoderLayer(
|
952 |
+
embed_dim=config.embed_dim,
|
953 |
+
ffn_embed_dim=config.ffn_embed_dim,
|
954 |
+
num_heads=config.num_heads,
|
955 |
+
rope_config=config.rope_config,
|
956 |
+
norm_type=config.norm_type,
|
957 |
+
parallel_attention_ff=config.parallel_attention_ff,
|
958 |
+
add_bias_ffn=config.add_bias_ffn,
|
959 |
+
ffn_activation_name=config.ffn_activation_name,
|
960 |
+
use_glu_in_ffn=config.use_glu_in_ffn,
|
961 |
+
num_kv_heads=config.num_kv_heads, # type: ignore
|
962 |
+
add_bias_attn=config.add_bias_attn,
|
963 |
+
rms_norm_eps=config.rms_norm_eps,
|
964 |
+
)
|
965 |
+
for _ in range(config.num_layers)
|
966 |
+
]
|
967 |
+
)
|
968 |
+
|
969 |
+
self.lm_head = TorchSimpleLMHead(
|
970 |
+
embed_dim=config.embed_dim,
|
971 |
+
alphabet_size=config.vocab_size,
|
972 |
+
add_bias_lm_head=config.add_bias_lm_head,
|
973 |
+
)
|
974 |
+
|
975 |
+
def apply_transformer_layers(
|
976 |
+
self, embeddings: torch.Tensor, attention_mask: torch.Tensor = None
|
977 |
+
) -> torch.Tensor:
|
978 |
+
if attention_mask is None:
|
979 |
+
attention_mask = build_causal_attention_mask(
|
980 |
+
1, embeddings.shape[1], device=embeddings.device
|
981 |
+
)
|
982 |
+
for layer in self.layers:
|
983 |
+
embeddings = layer(embeddings, attention_mask)
|
984 |
+
|
985 |
+
return embeddings
|
986 |
+
|
987 |
+
def forward(
|
988 |
+
self, token_ids: torch.Tensor, attention_mask: torch.Tensor = None
|
989 |
+
) -> dict[str, torch.Tensor]:
|
990 |
+
if attention_mask is None:
|
991 |
+
attention_mask = build_causal_attention_mask(
|
992 |
+
1, token_ids.shape[1], device=token_ids.device
|
993 |
+
)
|
994 |
+
|
995 |
+
tokens_embeddings = self.token_embed(token_ids)
|
996 |
+
|
997 |
+
after_transformer_embeddings = self.apply_transformer_layers(
|
998 |
+
tokens_embeddings, attention_mask=attention_mask
|
999 |
+
)
|
1000 |
+
|
1001 |
+
embeddings = self.final_norm(after_transformer_embeddings)
|
1002 |
+
logits = self.lm_head(embeddings)
|
1003 |
+
return {"embeddings": embeddings, "logits": logits}
|
1004 |
+
|
1005 |
+
|
1006 |
+
class TorchSimpleLMHead(nn.Module):
|
1007 |
+
def __init__(
|
1008 |
+
self, embed_dim: int, alphabet_size: int, add_bias_lm_head: bool = True
|
1009 |
+
) -> None:
|
1010 |
+
super().__init__()
|
1011 |
+
self.fc = nn.Linear(embed_dim, alphabet_size, bias=add_bias_lm_head)
|
1012 |
+
|
1013 |
+
def forward(self, x: torch.Tensor) -> torch.Tensor:
|
1014 |
+
return self.fc(x)
|
1015 |
+
|
1016 |
+
|
1017 |
+
class TorchGptDecoderLayer(nn.Module):
|
1018 |
+
def __init__(
|
1019 |
+
self,
|
1020 |
+
embed_dim: int,
|
1021 |
+
ffn_embed_dim: int,
|
1022 |
+
num_heads: int,
|
1023 |
+
rope_config: RotaryEmbeddingConfig,
|
1024 |
+
norm_type: str,
|
1025 |
+
parallel_attention_ff: bool,
|
1026 |
+
add_bias_ffn: bool,
|
1027 |
+
ffn_activation_name: str,
|
1028 |
+
use_glu_in_ffn: bool,
|
1029 |
+
num_kv_heads: int,
|
1030 |
+
add_bias_attn: bool,
|
1031 |
+
rms_norm_eps: float = 1e-6,
|
1032 |
+
) -> None:
|
1033 |
+
super().__init__()
|
1034 |
+
self.num_heads = num_heads
|
1035 |
+
self.parallel_attention_ff = parallel_attention_ff
|
1036 |
+
self.use_glu_in_ffn = use_glu_in_ffn
|
1037 |
+
|
1038 |
+
# Self-Attention layer
|
1039 |
+
self.self_attn = TorchGptGroupedQueryAttention(
|
1040 |
+
embed_dim=embed_dim,
|
1041 |
+
num_heads=num_heads,
|
1042 |
+
num_kv_heads=num_kv_heads,
|
1043 |
+
rope_config=rope_config,
|
1044 |
+
add_bias_attn=add_bias_attn,
|
1045 |
+
)
|
1046 |
+
|
1047 |
+
# Normalization layers
|
1048 |
+
if norm_type == "layer_norm":
|
1049 |
+
self.attn_norm = nn.LayerNorm(embed_dim)
|
1050 |
+
if not self.parallel_attention_ff:
|
1051 |
+
self.ffn_norm = nn.LayerNorm(embed_dim)
|
1052 |
+
elif norm_type == "RMS_norm":
|
1053 |
+
self.attn_norm = TorchRMSNorm(embed_dim, eps=rms_norm_eps)
|
1054 |
+
if not self.parallel_attention_ff:
|
1055 |
+
self.ffn_norm = TorchRMSNorm(embed_dim, eps=rms_norm_eps)
|
1056 |
+
else:
|
1057 |
+
raise ValueError(f"unrecognized norm_type: {norm_type}")
|
1058 |
+
|
1059 |
+
# Feedforward network
|
1060 |
+
self.activation = get_activation_fn(ffn_activation_name)
|
1061 |
+
ffn_hidden_dim = ffn_embed_dim * (2 if use_glu_in_ffn else 1)
|
1062 |
+
self.fc1 = nn.Linear(embed_dim, ffn_hidden_dim, bias=add_bias_ffn)
|
1063 |
+
self.fc2 = nn.Linear(ffn_embed_dim, embed_dim, bias=add_bias_ffn)
|
1064 |
+
|
1065 |
+
def forward(
|
1066 |
+
self, embeddings: torch.Tensor, attention_mask: torch.Tensor
|
1067 |
+
) -> torch.Tensor:
|
1068 |
+
residuals = embeddings
|
1069 |
+
|
1070 |
+
if self.parallel_attention_ff:
|
1071 |
+
# Parallel Attention + MLP
|
1072 |
+
embeddings_normed = self.attn_norm(embeddings)
|
1073 |
+
|
1074 |
+
attn_output, _ = self.self_attn(
|
1075 |
+
embeddings_normed,
|
1076 |
+
embeddings_normed,
|
1077 |
+
embeddings_normed,
|
1078 |
+
attn_mask=attention_mask,
|
1079 |
+
)
|
1080 |
+
ffn_output = self.mlp(embeddings_normed) # type: ignore
|
1081 |
+
|
1082 |
+
return residuals + attn_output + ffn_output
|
1083 |
+
else:
|
1084 |
+
# Sequential Attention + MLP
|
1085 |
+
normed_embeddings = self.attn_norm(embeddings)
|
1086 |
+
|
1087 |
+
attn_output = embeddings + self.self_attn(
|
1088 |
+
normed_embeddings,
|
1089 |
+
normed_embeddings,
|
1090 |
+
normed_embeddings,
|
1091 |
+
attention_mask=attention_mask,
|
1092 |
+
)
|
1093 |
+
|
1094 |
+
normed_embeddings2 = self.ffn_norm(attn_output)
|
1095 |
+
ffn_output = self.mlp(normed_embeddings2) # type: ignore
|
1096 |
+
return attn_output + ffn_output # Residual connection
|
1097 |
+
|
1098 |
+
def mlp(self, x: torch.Tensor) -> torch.Tensor:
|
1099 |
+
"""Applies the feedforward network (MLP) with optional GLU."""
|
1100 |
+
ffn_output = self.fc1(x)
|
1101 |
+
|
1102 |
+
if self.use_glu_in_ffn:
|
1103 |
+
ffn_output1, ffn_output2 = ffn_output.chunk(2, dim=-1)
|
1104 |
+
ffn_output = self.activation(ffn_output1) * ffn_output2
|
1105 |
+
else:
|
1106 |
+
ffn_output = self.activation(ffn_output)
|
1107 |
+
|
1108 |
+
return self.fc2(ffn_output)
|
1109 |
+
|
1110 |
+
|
1111 |
+
class TorchRMSNorm(nn.Module):
|
1112 |
+
def __init__(self, dim: int, eps: float = 1e-6) -> None:
|
1113 |
+
super().__init__()
|
1114 |
+
self.eps = eps
|
1115 |
+
self.scale = nn.Parameter(torch.ones(dim))
|
1116 |
+
|
1117 |
+
def forward(self, x: torch.Tensor) -> torch.Tensor:
|
1118 |
+
return (
|
1119 |
+
x
|
1120 |
+
* self.scale
|
1121 |
+
/ torch.sqrt(torch.mean(x**2, dim=-1, keepdim=True) + self.eps)
|
1122 |
+
)
|
1123 |
+
|
1124 |
+
|
1125 |
+
def get_activation_fn(activation_name: str): # type: ignore
|
1126 |
+
activations = {
|
1127 |
+
"gelu": nn.functional.gelu,
|
1128 |
+
"relu": nn.functional.relu,
|
1129 |
+
"swish": nn.functional.silu,
|
1130 |
+
"silu": nn.functional.silu,
|
1131 |
+
}
|
1132 |
+
return activations.get(activation_name, nn.functional.relu)
|
1133 |
+
|
1134 |
+
|
1135 |
+
def build_causal_attention_mask(
|
1136 |
+
batch_size: int, seq_len: int, device: torch.device
|
1137 |
+
) -> torch.Tensor:
|
1138 |
+
"""
|
1139 |
+
Builds a batch of causal masks of shape (batch_size, 1, seq_len, seq_len) to feed
|
1140 |
+
to an attention layer.
|
1141 |
+
|
1142 |
+
Args:
|
1143 |
+
batch_size: Batch size.
|
1144 |
+
seq_len: Length of the sequences.
|
1145 |
+
|
1146 |
+
Returns:
|
1147 |
+
Batch of causal masks.
|
1148 |
+
"""
|
1149 |
+
mask = torch.ones((batch_size, 1, seq_len, seq_len), device=device)
|
1150 |
+
causal_mask = torch.tril(mask)
|
1151 |
+
return causal_mask
|
1152 |
+
|
1153 |
+
|
1154 |
+
@dataclass
|
1155 |
+
class RotaryEmbeddingConfigBis:
|
1156 |
+
"""
|
1157 |
+
Parameters to initialize the RotaryEmbedding layer. The rescaling factor allows
|
1158 |
+
to adapt the rotary embeddings to larger lengths than what was used for training.
|
1159 |
+
One of this strategy is presented in the Yarn paper: https://arxiv.org/pdf/2309.00071.pdf. # noqa
|
1160 |
+
Args:
|
1161 |
+
"""
|
1162 |
+
|
1163 |
+
rescaling_factor: Optional[float]
|
1164 |
+
|
1165 |
+
|
1166 |
+
class RotaryEmbeddingBis(torch.nn.Module):
|
1167 |
+
"""
|
1168 |
+
Rotary position embeddings based on those in
|
1169 |
+
[RoFormer](https://huggingface.co/docs/transformers/model_doc/roformer).
|
1170 |
+
Query and keys are transformed by rotation
|
1171 |
+
matrices which depend on their relative positions.
|
1172 |
+
"""
|
1173 |
+
|
1174 |
+
def __init__(self, dim: int, rotary_embedding_config: RotaryEmbeddingConfigBis):
|
1175 |
+
super().__init__()
|
1176 |
+
|
1177 |
+
# Extract argument from the config
|
1178 |
+
self.rescaling_factor = rotary_embedding_config.rescaling_factor
|
1179 |
+
self.upper_freq = 10000
|
1180 |
+
self.dim = dim
|
1181 |
+
|
1182 |
+
self._seq_len_cached = None
|
1183 |
+
self._cos_cached = None
|
1184 |
+
self._sin_cached = None
|
1185 |
+
|
1186 |
+
def _apply_rotary_pos_emb(
|
1187 |
+
self,
|
1188 |
+
heads: torch.Tensor,
|
1189 |
+
cos: torch.Tensor,
|
1190 |
+
sin: torch.Tensor,
|
1191 |
+
) -> torch.Tensor:
|
1192 |
+
""" """
|
1193 |
+
x_first, x_second = (
|
1194 |
+
heads[..., : heads.shape[-1] // 2],
|
1195 |
+
heads[..., heads.shape[-1] // 2 :],
|
1196 |
+
)
|
1197 |
+
|
1198 |
+
first_part = x_first * cos - x_second * sin
|
1199 |
+
second_part = x_second * cos + x_first * sin
|
1200 |
+
|
1201 |
+
return torch.cat((first_part, second_part), dim=-1)
|
1202 |
+
|
1203 |
+
def _compute_cos_sin_tables(
|
1204 |
+
self, x: torch.Tensor, inv_freq: torch.Tensor, seq_dimension: int = 2
|
1205 |
+
) -> tuple[torch.Tensor, torch.Tensor]:
|
1206 |
+
seq_len = x.shape[seq_dimension]
|
1207 |
+
# Reset the tables if the sequence length has changed,
|
1208 |
+
# or if we're on a new device (possibly due to tracing for instance)
|
1209 |
+
self._seq_len_cached = seq_len
|
1210 |
+
t = torch.arange(x.shape[seq_dimension], device=x.device).type_as(inv_freq)
|
1211 |
+
# freqs = torch.outer(t, inv_freq)
|
1212 |
+
freqs = torch.einsum("i, j -> ij", t, inv_freq)
|
1213 |
+
|
1214 |
+
self._cos_cached = torch.cos(freqs)[None, :, None, :]
|
1215 |
+
self._sin_cached = torch.sin(freqs)[None, :, None, :]
|
1216 |
+
# emb = torch.cat((freqs, freqs), dim=-1).to(x.device)
|
1217 |
+
|
1218 |
+
# self._cos_cached = emb.cos()[None, None, :, :]
|
1219 |
+
# self._sin_cached = emb.sin()[None, None, :, :]
|
1220 |
+
|
1221 |
+
return self._cos_cached, self._sin_cached
|
1222 |
+
|
1223 |
+
def forward(
|
1224 |
+
self, q: torch.Tensor, k: torch.Tensor
|
1225 |
+
) -> Tuple[torch.Tensor, torch.Tensor]:
|
1226 |
+
if self.rescaling_factor is None:
|
1227 |
+
inv_freq = 1.0 / (
|
1228 |
+
self.upper_freq
|
1229 |
+
** (torch.arange(0, self.dim, 2, device=q.device).float() / self.dim)
|
1230 |
+
)
|
1231 |
+
else:
|
1232 |
+
updated_base = self.upper_freq * (
|
1233 |
+
self.rescaling_factor ** (self.dim / (self.dim - 2))
|
1234 |
+
)
|
1235 |
+
inv_freq = 1.0 / (
|
1236 |
+
updated_base
|
1237 |
+
** (torch.arange(0, self.dim, 2, device=q.device).float() / self.dim)
|
1238 |
+
)
|
1239 |
+
|
1240 |
+
self._cos_cached, self._sin_cached = self._compute_cos_sin_tables(
|
1241 |
+
q,
|
1242 |
+
inv_freq,
|
1243 |
+
seq_dimension=-3,
|
1244 |
+
)
|
1245 |
+
|
1246 |
+
return (
|
1247 |
+
self._apply_rotary_pos_emb(q, self._cos_cached, self._sin_cached),
|
1248 |
+
self._apply_rotary_pos_emb(k, self._cos_cached, self._sin_cached),
|
1249 |
+
)
|
1250 |
+
|
1251 |
+
|
1252 |
+
class MultiHeadAttention(nn.Module):
|
1253 |
+
def __init__(
|
1254 |
+
self,
|
1255 |
+
num_heads: int,
|
1256 |
+
key_size: int,
|
1257 |
+
rotary_embedding_config: Optional[RotaryEmbeddingConfigBis] = None,
|
1258 |
+
add_bias_kv: bool = False,
|
1259 |
+
value_size: Optional[int] = None,
|
1260 |
+
model_size: Optional[int] = None,
|
1261 |
+
name: Optional[str] = None,
|
1262 |
+
):
|
1263 |
+
super().__init__()
|
1264 |
+
if not model_size:
|
1265 |
+
model_size = key_size * num_heads
|
1266 |
+
if not value_size:
|
1267 |
+
value_size = key_size
|
1268 |
+
self.model_size = model_size
|
1269 |
+
self.key_size = key_size
|
1270 |
+
self.value_size = value_size
|
1271 |
+
self.add_bias_kv = add_bias_kv
|
1272 |
+
self.name = name
|
1273 |
+
self.num_heads = num_heads
|
1274 |
+
self._rotary_embedding_config = rotary_embedding_config
|
1275 |
+
|
1276 |
+
self.w_k = nn.Linear(self.model_size, self.num_heads * self.key_size)
|
1277 |
+
self.w_q = nn.Linear(self.model_size, self.num_heads * self.key_size)
|
1278 |
+
self.w_v = nn.Linear(self.model_size, self.num_heads * self.value_size)
|
1279 |
+
self.output = nn.Linear(self.num_heads * self.value_size, self.model_size)
|
1280 |
+
if self._rotary_embedding_config:
|
1281 |
+
self._rotary_embedding = RotaryEmbeddingBis(
|
1282 |
+
self.key_size, self._rotary_embedding_config
|
1283 |
+
)
|
1284 |
+
|
1285 |
+
def apply_rotary_embeddings(
|
1286 |
+
self,
|
1287 |
+
query: torch.Tensor,
|
1288 |
+
key: torch.Tensor,
|
1289 |
+
) -> tuple[torch.Tensor, torch.Tensor]:
|
1290 |
+
""" """
|
1291 |
+
query, key = self._rotary_embedding(query, key)
|
1292 |
+
return query, key
|
1293 |
+
|
1294 |
+
def forward(
|
1295 |
+
self,
|
1296 |
+
query: torch.Tensor,
|
1297 |
+
key: torch.Tensor,
|
1298 |
+
value: torch.Tensor,
|
1299 |
+
attention_mask: Optional[torch.Tensor] = None,
|
1300 |
+
attention_weight_bias: Optional[torch.Tensor] = None,
|
1301 |
+
) -> dict[str, torch.Tensor]:
|
1302 |
+
"""
|
1303 |
+
Returns:
|
1304 |
+
dictionary containing attention weights
|
1305 |
+
and outputs.
|
1306 |
+
"""
|
1307 |
+
key_heads = self.w_k(key).reshape(
|
1308 |
+
(*key.shape[:-1], self.num_heads, self.key_size)
|
1309 |
+
)
|
1310 |
+
query_heads = self.w_q(query).reshape(
|
1311 |
+
(*query.shape[:-1], self.num_heads, self.key_size)
|
1312 |
+
)
|
1313 |
+
value_heads = self.w_v(value).reshape(
|
1314 |
+
(*value.shape[:-1], self.num_heads, self.value_size)
|
1315 |
+
)
|
1316 |
+
if self._rotary_embedding_config:
|
1317 |
+
query_heads, key_heads = self.apply_rotary_embeddings(
|
1318 |
+
query_heads, key_heads
|
1319 |
+
)
|
1320 |
+
attention_weights = torch.einsum(
|
1321 |
+
"...thd, ...Thd -> ...htT", query_heads, key_heads
|
1322 |
+
)
|
1323 |
+
sqrt_key_size = np.sqrt(self.key_size)
|
1324 |
+
attention_weights = attention_weights / sqrt_key_size
|
1325 |
+
if attention_mask is not None:
|
1326 |
+
attention_weights = torch.where(attention_mask, attention_weights, -1e30)
|
1327 |
+
if attention_weight_bias is not None:
|
1328 |
+
attention_weights = F.softmax(
|
1329 |
+
attention_weights + attention_weight_bias, dim=-1
|
1330 |
+
)
|
1331 |
+
else:
|
1332 |
+
attention_weights = F.softmax(attention_weights, dim=-1)
|
1333 |
+
value_out = torch.einsum(
|
1334 |
+
"...htT, ...Thd->...thd", attention_weights, value_heads
|
1335 |
+
)
|
1336 |
+
value_out = value_out.reshape((*value_out.shape[:-2], -1))
|
1337 |
+
embeddings = self.output(value_out)
|
1338 |
+
|
1339 |
+
return {"attention_weights": attention_weights, "embeddings": embeddings}
|
1340 |
+
|
1341 |
+
|
1342 |
+
class SelfAttentionBlock(nn.Module):
|
1343 |
+
def __init__(
|
1344 |
+
self,
|
1345 |
+
num_heads: int,
|
1346 |
+
embed_dim: int,
|
1347 |
+
ffn_embed_dim: int,
|
1348 |
+
key_size: Optional[int] = None,
|
1349 |
+
add_bias_kv: bool = False,
|
1350 |
+
add_bias_fnn: bool = True,
|
1351 |
+
ffn_activation_name: str = "gelu-no-approx",
|
1352 |
+
use_glu_in_ffn: bool = False,
|
1353 |
+
layer_norm_eps: float = 1e-5, # this is the default haiku value
|
1354 |
+
pre_layer_norm: bool = True,
|
1355 |
+
name: Optional[str] = None,
|
1356 |
+
rotary_embedding_config: Optional[RotaryEmbeddingConfigBis] = None,
|
1357 |
+
):
|
1358 |
+
super().__init__()
|
1359 |
+
if key_size is None:
|
1360 |
+
if embed_dim % num_heads != 0:
|
1361 |
+
raise ValueError(
|
1362 |
+
f"The embedding dimension should be divisible by the number of "
|
1363 |
+
f"heads, however provided embedding dimension is {embed_dim} and "
|
1364 |
+
f"the number of heads is {num_heads}."
|
1365 |
+
)
|
1366 |
+
else:
|
1367 |
+
key_size = embed_dim // num_heads
|
1368 |
+
|
1369 |
+
# Get ffn activation function
|
1370 |
+
self._pre_layer_norm = pre_layer_norm
|
1371 |
+
self._use_glu_in_fnn = use_glu_in_ffn
|
1372 |
+
# Define layers
|
1373 |
+
if use_glu_in_ffn:
|
1374 |
+
# user should multiply ffn_embed_dim by 2/3 when using GLU
|
1375 |
+
# to keep total number of parameters equal
|
1376 |
+
# see https://arxiv.org/pdf/2002.05202.pdf. for more details
|
1377 |
+
# we multiply by 2 here as the output will be split in 2 for GLU
|
1378 |
+
self.fc1 = nn.Linear(embed_dim, int(2 * ffn_embed_dim), bias=add_bias_fnn)
|
1379 |
+
else:
|
1380 |
+
self.fc1 = nn.Linear(embed_dim, ffn_embed_dim, bias=add_bias_fnn)
|
1381 |
+
|
1382 |
+
self.fc2 = nn.Linear(ffn_embed_dim, embed_dim, bias=add_bias_fnn)
|
1383 |
+
|
1384 |
+
self.layer_norm_self_attention = nn.LayerNorm(
|
1385 |
+
embed_dim,
|
1386 |
+
)
|
1387 |
+
self.layer_norm_mlp = nn.LayerNorm(embed_dim)
|
1388 |
+
if ffn_activation_name == "swish":
|
1389 |
+
self._ffn_activation_fn = nn.SiLU()
|
1390 |
+
elif ffn_activation_name == "gelu-no-approx":
|
1391 |
+
self._ffn_activation_fn = nn.GELU(approximate="tanh")
|
1392 |
+
else:
|
1393 |
+
self._ffn_activation_fn = getattr(torch.nn, ffn_activation_name)
|
1394 |
+
|
1395 |
+
self.mha = MultiHeadAttention(
|
1396 |
+
num_heads=num_heads,
|
1397 |
+
key_size=key_size,
|
1398 |
+
add_bias_kv=add_bias_kv,
|
1399 |
+
model_size=embed_dim,
|
1400 |
+
name="self_attention",
|
1401 |
+
rotary_embedding_config=rotary_embedding_config,
|
1402 |
+
)
|
1403 |
+
|
1404 |
+
def mlp(self, embed: torch.Tensor) -> torch.Tensor:
|
1405 |
+
|
1406 |
+
if self._pre_layer_norm:
|
1407 |
+
x = self.layer_norm_mlp(embed)
|
1408 |
+
else:
|
1409 |
+
x = embed
|
1410 |
+
|
1411 |
+
if self._use_glu_in_fnn:
|
1412 |
+
x = self.fc1(x)
|
1413 |
+
x1, x2 = torch.split(x, split_size_or_sections=x.shape[-1] // 2, dim=-1)
|
1414 |
+
x = self._ffn_activation_fn(x1) * x2
|
1415 |
+
else:
|
1416 |
+
x = self._ffn_activation_fn(self.fc1(x))
|
1417 |
+
x = self.fc2(x)
|
1418 |
+
|
1419 |
+
if not self._pre_layer_norm:
|
1420 |
+
x = self.layer_norm_mlp(x + embed)
|
1421 |
+
return x
|
1422 |
+
|
1423 |
+
def forward(
|
1424 |
+
self,
|
1425 |
+
x: torch.Tensor,
|
1426 |
+
attention_mask: Optional[torch.Tensor] = None,
|
1427 |
+
attention_weight_bias: Optional[torch.Tensor] = None,
|
1428 |
+
) -> dict[str, torch.Tensor]:
|
1429 |
+
|
1430 |
+
res = x
|
1431 |
+
if self._pre_layer_norm:
|
1432 |
+
x = self.layer_norm_self_attention(x)
|
1433 |
+
|
1434 |
+
output: dict[str, torch.Tensor] = self.mha(
|
1435 |
+
x,
|
1436 |
+
x,
|
1437 |
+
x,
|
1438 |
+
attention_mask=attention_mask,
|
1439 |
+
attention_weight_bias=attention_weight_bias,
|
1440 |
+
)
|
1441 |
+
|
1442 |
+
if not self._pre_layer_norm:
|
1443 |
+
output["embeddings"] = self.layer_norm_self_attention(
|
1444 |
+
output["embeddings"] + res
|
1445 |
+
)
|
1446 |
+
|
1447 |
+
x = output["embeddings"]
|
1448 |
+
else:
|
1449 |
+
x = output["embeddings"]
|
1450 |
+
x = res + x
|
1451 |
+
|
1452 |
+
# MLP
|
1453 |
+
if not self._pre_layer_norm:
|
1454 |
+
x = self.mlp(x)
|
1455 |
+
else:
|
1456 |
+
x = x + self.mlp(x)
|
1457 |
+
|
1458 |
+
output["embeddings"] = x
|
1459 |
+
return output
|
1460 |
+
|
1461 |
+
|
1462 |
+
class RobertaLMHead(nn.Module):
|
1463 |
+
"""
|
1464 |
+
Roberta Language Model head. Transforms final attention layer output into a
|
1465 |
+
distribution over tokens at each position.
|
1466 |
+
"""
|
1467 |
+
|
1468 |
+
def __init__(self, embed_dim: int, alphabet_size: int):
|
1469 |
+
"""
|
1470 |
+
Args:
|
1471 |
+
embed_dim: Embedding dimension.
|
1472 |
+
alphabet_size: Number of tokens in the alphabet.
|
1473 |
+
"""
|
1474 |
+
super().__init__()
|
1475 |
+
self.embed_dim = embed_dim
|
1476 |
+
self.alphabet_size = alphabet_size
|
1477 |
+
|
1478 |
+
# Define layers
|
1479 |
+
self._first_layer_norm = nn.LayerNorm(embed_dim, elementwise_affine=True)
|
1480 |
+
self._fc1 = nn.Linear(embed_dim, embed_dim)
|
1481 |
+
self._second_layer_norm = nn.LayerNorm(embed_dim, elementwise_affine=True)
|
1482 |
+
self._final_fc = nn.Linear(embed_dim, alphabet_size)
|
1483 |
+
|
1484 |
+
def forward(self, x: torch.Tensor) -> dict:
|
1485 |
+
x = self._first_layer_norm(x)
|
1486 |
+
embeddings = x
|
1487 |
+
x = self._fc1(x)
|
1488 |
+
x = nn.functional.gelu(x)
|
1489 |
+
x = self._second_layer_norm(x)
|
1490 |
+
logits = self._final_fc(x)
|
1491 |
+
return {"embeddings": embeddings, "logits": logits}
|
1492 |
+
|
1493 |
+
|
1494 |
+
class TorchNucleotideTransformer(nn.Module):
|
1495 |
+
def __init__(
|
1496 |
+
self,
|
1497 |
+
nt_config: NucleotideTransformerConfig,
|
1498 |
+
):
|
1499 |
+
super(TorchNucleotideTransformer, self).__init__()
|
1500 |
+
self.nt_config = nt_config
|
1501 |
+
|
1502 |
+
# Other cases are not implemented
|
1503 |
+
assert nt_config.positional_embedding is None
|
1504 |
+
assert nt_config.lm_head == "roberta"
|
1505 |
+
assert nt_config.use_rotary_embedding is True
|
1506 |
+
assert nt_config.token_dropout is False
|
1507 |
+
assert nt_config.emb_layer_norm_before is False
|
1508 |
+
assert nt_config.mask_before_attention is False
|
1509 |
+
assert nt_config.bias_word_embedding is False
|
1510 |
+
assert nt_config.use_gradient_checkpointing is False
|
1511 |
+
|
1512 |
+
self.embed_layer = nn.Embedding(nt_config.alphabet_size, nt_config.embed_dim)
|
1513 |
+
|
1514 |
+
self.lm_head = RobertaLMHead(
|
1515 |
+
embed_dim=nt_config.embed_dim,
|
1516 |
+
alphabet_size=nt_config.alphabet_size,
|
1517 |
+
)
|
1518 |
+
|
1519 |
+
self.rotary_embedding_config = RotaryEmbeddingConfigBis(
|
1520 |
+
rescaling_factor=nt_config.rescaling_factor
|
1521 |
+
)
|
1522 |
+
|
1523 |
+
self.attention_blocks = nn.ModuleList(
|
1524 |
+
[
|
1525 |
+
SelfAttentionBlock( # type: ignore
|
1526 |
+
num_heads=nt_config.attention_heads,
|
1527 |
+
embed_dim=nt_config.embed_dim,
|
1528 |
+
key_size=nt_config.key_size,
|
1529 |
+
ffn_embed_dim=nt_config.ffn_embed_dim,
|
1530 |
+
add_bias_kv=nt_config.add_bias_kv,
|
1531 |
+
add_bias_fnn=nt_config.add_bias_ffn,
|
1532 |
+
ffn_activation_name=nt_config.ffn_activation_name,
|
1533 |
+
use_glu_in_ffn=nt_config.use_glu_in_ffn,
|
1534 |
+
rotary_embedding_config=self.rotary_embedding_config,
|
1535 |
+
layer_norm_eps=nt_config.layer_norm_eps,
|
1536 |
+
pre_layer_norm=nt_config.pre_layer_norm,
|
1537 |
+
)
|
1538 |
+
for _ in range(nt_config.num_layers)
|
1539 |
+
]
|
1540 |
+
)
|
1541 |
+
|
1542 |
+
def forward(
|
1543 |
+
self, tokens: torch.Tensor, attention_mask: torch.Tensor = None
|
1544 |
+
) -> torch.Tensor:
|
1545 |
+
"""
|
1546 |
+
Computes the embeddings based on the input tokens.
|
1547 |
+
|
1548 |
+
Args:
|
1549 |
+
tokens: Input tokens out of the tokenizer of shape (batch_size, seq_len).
|
1550 |
+
attention_mask: Attention mask of shape (batch_size, 1, seq_len, seq_len).
|
1551 |
+
If no mask is provided, a mask by default which equals 1 over all non
|
1552 |
+
pad tokens and 0 over pad tokens is computed.
|
1553 |
+
|
1554 |
+
Returns:
|
1555 |
+
Dictionary containing the final embeddings and logits.
|
1556 |
+
"""
|
1557 |
+
x = self.embed_layer(tokens)
|
1558 |
+
|
1559 |
+
# RoBERTa's mask scaling factor
|
1560 |
+
x = self.nt_config.embed_scale * x
|
1561 |
+
|
1562 |
+
if attention_mask is None:
|
1563 |
+
attention_mask = build_padding_attention_mask(
|
1564 |
+
tokens=tokens, pad_token_id=self.nt_config.pad_token_id
|
1565 |
+
)
|
1566 |
+
|
1567 |
+
for layer in self.attention_blocks:
|
1568 |
+
x = layer(x, attention_mask)["embeddings"]
|
1569 |
+
|
1570 |
+
assert self.nt_config.lm_head == "roberta"
|
1571 |
+
x = self.lm_head(x)["embeddings"]
|
1572 |
+
|
1573 |
+
return x
|
1574 |
+
|
1575 |
+
|
1576 |
+
def build_padding_attention_mask(
|
1577 |
+
tokens: torch.Tensor, pad_token_id: int
|
1578 |
+
) -> torch.Tensor:
|
1579 |
+
"""
|
1580 |
+
Builds a padding mask from a sequence of tokens by masking <pad> in the attention.
|
1581 |
+
|
1582 |
+
Args:
|
1583 |
+
tokens: Batch of sequences of shape (batch_size, seq_len).
|
1584 |
+
pad_token_id: Int corresponding to the <pad> token to mask.
|
1585 |
+
|
1586 |
+
Returns:
|
1587 |
+
Batch of attention masks, masking out <pad> tokens.
|
1588 |
+
"""
|
1589 |
+
padding_mask = tokens != pad_token_id
|
1590 |
+
padding_mask = padding_mask.unsqueeze(1)
|
1591 |
+
padding_mask = torch.einsum("bhT, bht -> bhtT", padding_mask, padding_mask)
|
1592 |
+
return padding_mask
|
1593 |
+
|
1594 |
+
|
1595 |
+
class TorchBioBrainEncoder(nn.Module):
|
1596 |
+
def __init__(
|
1597 |
+
self,
|
1598 |
+
nt_config: NucleotideTransformerConfig,
|
1599 |
+
):
|
1600 |
+
super(TorchBioBrainEncoder, self).__init__()
|
1601 |
+
self.nt_config = nt_config
|
1602 |
+
self.nt_model = TorchNucleotideTransformer(self.nt_config)
|
1603 |
+
|
1604 |
+
def forward(
|
1605 |
+
self,
|
1606 |
+
bio_token_ids: torch.Tensor,
|
1607 |
+
) -> torch.Tensor:
|
1608 |
+
"""
|
1609 |
+
Args:
|
1610 |
+
bio_token_ids (torch.Tensor):
|
1611 |
+
Shape (batch_size, num_bio_tokens)
|
1612 |
+
|
1613 |
+
Returns:
|
1614 |
+
torch.Tensor:
|
1615 |
+
Shape (batch_size, num_bio_tokens, embed_dim)
|
1616 |
+
"""
|
1617 |
+
bio_embeddings = self.nt_model(tokens=bio_token_ids)
|
1618 |
+
|
1619 |
+
return bio_embeddings
|
1620 |
+
|
1621 |
+
|
1622 |
+
class TorchMultiModalPerceiverResamplerBlock(nn.Module):
|
1623 |
+
def __init__(
|
1624 |
+
self,
|
1625 |
+
num_heads: int,
|
1626 |
+
embed_dim: int,
|
1627 |
+
ffn_embed_dim: int,
|
1628 |
+
key_size: Optional[int] = None,
|
1629 |
+
add_bias_kv: bool = False,
|
1630 |
+
add_bias_ffn: bool = True,
|
1631 |
+
ffn_activation_name: str = "gelu",
|
1632 |
+
use_glu_in_ffn: bool = False,
|
1633 |
+
):
|
1634 |
+
super().__init__()
|
1635 |
+
|
1636 |
+
if key_size is None:
|
1637 |
+
if embed_dim % num_heads != 0:
|
1638 |
+
raise ValueError(
|
1639 |
+
f"Embedding dimension {embed_dim} should be divisible by "
|
1640 |
+
f"num_heads {num_heads}."
|
1641 |
+
)
|
1642 |
+
key_size = embed_dim // num_heads
|
1643 |
+
|
1644 |
+
self.num_heads = num_heads
|
1645 |
+
self.embed_dim = embed_dim
|
1646 |
+
self.ffn_embed_dim = ffn_embed_dim * 2 if use_glu_in_ffn else ffn_embed_dim
|
1647 |
+
self.use_glu_in_ffn = use_glu_in_ffn
|
1648 |
+
|
1649 |
+
self.cross_attention_1 = MultiHeadAttention(
|
1650 |
+
num_heads=num_heads, key_size=key_size, add_bias_kv=add_bias_kv
|
1651 |
+
)
|
1652 |
+
self.cross_attention_2 = MultiHeadAttention(
|
1653 |
+
num_heads=num_heads, key_size=key_size, add_bias_kv=add_bias_kv
|
1654 |
+
)
|
1655 |
+
|
1656 |
+
self.norm_cross_attention_1 = nn.LayerNorm(embed_dim)
|
1657 |
+
self.norm_cross_attention_2 = nn.LayerNorm(embed_dim)
|
1658 |
+
self.norm_mlp = nn.LayerNorm(embed_dim)
|
1659 |
+
|
1660 |
+
self.fc1 = nn.Linear(embed_dim, self.ffn_embed_dim, bias=add_bias_ffn)
|
1661 |
+
self.fc2 = nn.Linear(self.ffn_embed_dim, embed_dim, bias=add_bias_ffn)
|
1662 |
+
|
1663 |
+
self.activation_fn = getattr(
|
1664 |
+
nn.functional, ffn_activation_name, nn.functional.gelu
|
1665 |
+
)
|
1666 |
+
|
1667 |
+
def mlp(self, x: torch.Tensor) -> torch.Tensor:
|
1668 |
+
x = self.norm_mlp(x)
|
1669 |
+
if self.use_glu_in_ffn:
|
1670 |
+
x1, x2 = torch.chunk(self.fc1(x), 2, dim=-1)
|
1671 |
+
x = self.activation_fn(x1) * x2
|
1672 |
+
else:
|
1673 |
+
x = self.activation_fn(self.fc1(x))
|
1674 |
+
return self.fc2(x)
|
1675 |
+
|
1676 |
+
def forward(
|
1677 |
+
self,
|
1678 |
+
x: torch.Tensor,
|
1679 |
+
cross_attention_embeddings_1: torch.Tensor,
|
1680 |
+
cross_attention_embeddings_2: torch.Tensor,
|
1681 |
+
attention_mask_1: Optional[torch.Tensor] = None,
|
1682 |
+
attention_mask_2: Optional[torch.Tensor] = None,
|
1683 |
+
) -> Dict[str, torch.Tensor]:
|
1684 |
+
res = x
|
1685 |
+
x = self.norm_cross_attention_1(x)
|
1686 |
+
|
1687 |
+
attn_output = self.cross_attention_1(
|
1688 |
+
query=x,
|
1689 |
+
key=cross_attention_embeddings_1,
|
1690 |
+
value=cross_attention_embeddings_1,
|
1691 |
+
attention_mask=attention_mask_1,
|
1692 |
+
)["embeddings"]
|
1693 |
+
x = res + attn_output
|
1694 |
+
|
1695 |
+
res = x
|
1696 |
+
x = self.norm_cross_attention_2(x)
|
1697 |
+
attn_output = self.cross_attention_2(
|
1698 |
+
query=x,
|
1699 |
+
key=cross_attention_embeddings_2,
|
1700 |
+
value=cross_attention_embeddings_2,
|
1701 |
+
attention_mask=attention_mask_2,
|
1702 |
+
)["embeddings"]
|
1703 |
+
x = res + attn_output
|
1704 |
+
|
1705 |
+
x = x + self.mlp(x)
|
1706 |
+
|
1707 |
+
return {"embeddings": x}
|
1708 |
+
|
1709 |
+
|
1710 |
+
class TorchMultiModalPerceiverResampler(nn.Module):
|
1711 |
+
"""
|
1712 |
+
Perceiver Resampler model, made of successive PerceiverResamplerBlocks.
|
1713 |
+
"""
|
1714 |
+
|
1715 |
+
def __init__(
|
1716 |
+
self,
|
1717 |
+
config: PerceiverResamplerConfig,
|
1718 |
+
name: Optional[str] = None,
|
1719 |
+
):
|
1720 |
+
"""
|
1721 |
+
Initialize a Perceiver Resampler model.
|
1722 |
+
|
1723 |
+
Args:
|
1724 |
+
config: Dataclass containing model hyperparameters.
|
1725 |
+
name: Name for module (custom will break weight loading).
|
1726 |
+
"""
|
1727 |
+
super().__init__()
|
1728 |
+
self.config = config
|
1729 |
+
self.name = name
|
1730 |
+
self.layers = nn.ModuleList(
|
1731 |
+
[
|
1732 |
+
TorchMultiModalPerceiverResamplerBlock(
|
1733 |
+
num_heads=self.config.attention_heads,
|
1734 |
+
embed_dim=self.config.embed_dim,
|
1735 |
+
key_size=self.config.key_size,
|
1736 |
+
ffn_embed_dim=self.config.ffn_embed_dim,
|
1737 |
+
add_bias_kv=self.config.add_bias_kv,
|
1738 |
+
add_bias_ffn=self.config.add_bias_ffn,
|
1739 |
+
ffn_activation_name=self.config.ffn_activation_name,
|
1740 |
+
use_glu_in_ffn=self.config.use_glu_in_ffn,
|
1741 |
+
)
|
1742 |
+
for _ in range(self.config.num_layers)
|
1743 |
+
]
|
1744 |
+
)
|
1745 |
+
|
1746 |
+
self.latent_queries = torch.nn.Parameter(
|
1747 |
+
torch.randn(self.config.resampled_length, self.config.embed_dim)
|
1748 |
+
* (
|
1749 |
+
1.0
|
1750 |
+
/ torch.sqrt(torch.tensor(self.config.embed_dim, dtype=torch.float32))
|
1751 |
+
)
|
1752 |
+
)
|
1753 |
+
|
1754 |
+
def apply_attention_blocks(
|
1755 |
+
self,
|
1756 |
+
x: torch.Tensor,
|
1757 |
+
xf_1: torch.Tensor,
|
1758 |
+
xf_2: torch.Tensor,
|
1759 |
+
outs: Dict[str, torch.Tensor],
|
1760 |
+
attention_mask_1: Optional[torch.Tensor] = None,
|
1761 |
+
attention_mask_2: Optional[torch.Tensor] = None,
|
1762 |
+
) -> Tuple[torch.Tensor, Dict[str, torch.Tensor]]:
|
1763 |
+
"""
|
1764 |
+
Create the blocks of attention layers and applies them.
|
1765 |
+
"""
|
1766 |
+
for layer in self.layers:
|
1767 |
+
concat_input_1 = torch.cat([xf_1, x], dim=1)
|
1768 |
+
concat_input_2 = torch.cat([xf_2, x], dim=1)
|
1769 |
+
|
1770 |
+
output = layer(
|
1771 |
+
x=x,
|
1772 |
+
cross_attention_embeddings_1=concat_input_1,
|
1773 |
+
cross_attention_embeddings_2=concat_input_2,
|
1774 |
+
attention_mask_1=attention_mask_1,
|
1775 |
+
attention_mask_2=attention_mask_2,
|
1776 |
+
)
|
1777 |
+
x = output["embeddings"]
|
1778 |
+
|
1779 |
+
return x, outs
|
1780 |
+
|
1781 |
+
def forward(
|
1782 |
+
self,
|
1783 |
+
input_embeddings_1: torch.Tensor,
|
1784 |
+
input_embeddings_2: torch.Tensor,
|
1785 |
+
attention_mask_1: Optional[torch.Tensor] = None,
|
1786 |
+
attention_mask_2: Optional[torch.Tensor] = None,
|
1787 |
+
) -> Dict[str, torch.Tensor]:
|
1788 |
+
"""
|
1789 |
+
Computes the embeddings based on the input tokens.
|
1790 |
+
"""
|
1791 |
+
assert (
|
1792 |
+
input_embeddings_1.shape[-1] == self.config.embed_dim
|
1793 |
+
), "The input embedding dim should match the model embed dim"
|
1794 |
+
assert (
|
1795 |
+
input_embeddings_2.shape[-1] == self.config.embed_dim
|
1796 |
+
), "The input embedding dim should match the model embed dim"
|
1797 |
+
|
1798 |
+
batch_size = input_embeddings_1.shape[0]
|
1799 |
+
|
1800 |
+
latent_queries = self.latent_queries.unsqueeze(0).repeat(batch_size, 1, 1)
|
1801 |
+
|
1802 |
+
outs: Dict[str, torch.Tensor] = {}
|
1803 |
+
x = latent_queries
|
1804 |
+
|
1805 |
+
x, outs = self.apply_attention_blocks(
|
1806 |
+
x=x,
|
1807 |
+
xf_1=input_embeddings_1,
|
1808 |
+
xf_2=input_embeddings_2,
|
1809 |
+
outs=outs,
|
1810 |
+
attention_mask_1=attention_mask_1,
|
1811 |
+
attention_mask_2=attention_mask_2,
|
1812 |
+
)
|
1813 |
+
|
1814 |
+
outs["embeddings"] = x
|
1815 |
+
|
1816 |
+
return outs
|
1817 |
+
|
1818 |
+
|
1819 |
+
class TorchMultiModalPerceiverResamplerProjection(nn.Module):
|
1820 |
+
def __init__(
|
1821 |
+
self,
|
1822 |
+
perceiver_resampler_config: PerceiverResamplerConfig,
|
1823 |
+
input_embed_dim: int,
|
1824 |
+
embed_dim: int,
|
1825 |
+
bio_pad_token_id: int,
|
1826 |
+
english_pad_token_id: int,
|
1827 |
+
english_vocab_size: int,
|
1828 |
+
):
|
1829 |
+
super().__init__()
|
1830 |
+
self.config = perceiver_resampler_config
|
1831 |
+
self.input_embed_dim = input_embed_dim
|
1832 |
+
self.embed_dim = embed_dim
|
1833 |
+
self.bio_pad_token_id = bio_pad_token_id
|
1834 |
+
self.english_pad_token_id = english_pad_token_id
|
1835 |
+
self.english_vocab_size = english_vocab_size
|
1836 |
+
|
1837 |
+
self.bio_projection = nn.Linear(input_embed_dim, embed_dim)
|
1838 |
+
self.token_embedding = nn.Embedding(english_vocab_size, embed_dim)
|
1839 |
+
self.perceiver_resampler = TorchMultiModalPerceiverResampler(config=self.config)
|
1840 |
+
|
1841 |
+
def forward(
|
1842 |
+
self,
|
1843 |
+
bio_token_ids: torch.Tensor,
|
1844 |
+
bio_embeddings: torch.Tensor,
|
1845 |
+
english_token_ids: torch.Tensor,
|
1846 |
+
) -> torch.Tensor:
|
1847 |
+
"""
|
1848 |
+
Args:
|
1849 |
+
bio_token_ids (torch.Tensor):
|
1850 |
+
Shape (batch_size, num_bio_tokens)
|
1851 |
+
|
1852 |
+
bio_embeddings (torch.Tensor):
|
1853 |
+
Shape (batch_size, num_bio_tokens, embed_dim)
|
1854 |
+
|
1855 |
+
english_token_ids (torch.Tensor):
|
1856 |
+
Shape (batch_size, num_english_tokens)
|
1857 |
+
"""
|
1858 |
+
projected_bio_embeddings = self.bio_projection(bio_embeddings)
|
1859 |
+
english_embeddings = self.token_embedding(english_token_ids)
|
1860 |
+
|
1861 |
+
bio_attention_mask = build_perceiver_padding_attention_mask(
|
1862 |
+
bio_token_ids, self.config.resampled_length, self.bio_pad_token_id
|
1863 |
+
)
|
1864 |
+
english_attention_mask = build_perceiver_padding_attention_mask(
|
1865 |
+
english_token_ids, self.config.resampled_length, self.english_pad_token_id
|
1866 |
+
)
|
1867 |
+
|
1868 |
+
projected_embeddings = self.perceiver_resampler(
|
1869 |
+
input_embeddings_1=projected_bio_embeddings,
|
1870 |
+
attention_mask_1=bio_attention_mask,
|
1871 |
+
input_embeddings_2=english_embeddings,
|
1872 |
+
attention_mask_2=english_attention_mask,
|
1873 |
+
)["embeddings"]
|
1874 |
+
|
1875 |
+
return projected_embeddings
|
1876 |
+
|
1877 |
+
|
1878 |
+
def build_perceiver_padding_attention_mask(
|
1879 |
+
tokens: torch.Tensor, resampled_length: int, pad_token_id: int
|
1880 |
+
) -> torch.Tensor:
|
1881 |
+
batch_size, seq_len = tokens.shape
|
1882 |
+
padding_mask = tokens != pad_token_id # (batch_size, seq_len)
|
1883 |
+
|
1884 |
+
padding_mask = torch.cat(
|
1885 |
+
[
|
1886 |
+
padding_mask,
|
1887 |
+
torch.ones(
|
1888 |
+
(batch_size, resampled_length), dtype=torch.bool, device=tokens.device
|
1889 |
+
),
|
1890 |
+
],
|
1891 |
+
dim=1,
|
1892 |
+
) # (batch_size, seq_len + resampled_length)
|
1893 |
+
|
1894 |
+
padding_mask = padding_mask[:, None, None, :]
|
1895 |
+
padding_mask = padding_mask.repeat(1, 1, resampled_length, 1) # noqa
|
1896 |
+
return padding_mask
|
config.json
CHANGED
@@ -7,17 +7,32 @@
|
|
7 |
"AutoModel": "chatNT.TorchMultiOmicsModel"
|
8 |
},
|
9 |
"bio_pad_token_id": 1,
|
10 |
-
"custom_pipelines": {
|
11 |
-
"ChatNT-text-generation": {
|
12 |
-
"impl": "text_generation.TextGenerationPipeline",
|
13 |
-
"pt": [
|
14 |
-
"AutoModel"
|
15 |
-
],
|
16 |
-
"tf": []
|
17 |
-
}
|
18 |
-
},
|
19 |
"english_pad_token_id": 2,
|
20 |
-
"
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
21 |
"add_bias_ffn": false,
|
22 |
"add_bias_kv": false,
|
23 |
"alphabet_size": 4107,
|
@@ -50,30 +65,6 @@
|
|
50 |
"use_gradient_checkpointing": false,
|
51 |
"use_rotary_embedding": true
|
52 |
},
|
53 |
-
"gpt_config": {
|
54 |
-
"add_bias_attn": false,
|
55 |
-
"add_bias_ffn": false,
|
56 |
-
"add_bias_lm_head": false,
|
57 |
-
"embed_dim": 4096,
|
58 |
-
"eos_token_id": 2,
|
59 |
-
"ffn_activation_name": "silu",
|
60 |
-
"ffn_embed_dim": 11008,
|
61 |
-
"norm_type": "RMS_norm",
|
62 |
-
"num_heads": 32,
|
63 |
-
"num_kv_heads": 32,
|
64 |
-
"num_layers": 32,
|
65 |
-
"parallel_attention_ff": false,
|
66 |
-
"rms_norm_eps": 1e-06,
|
67 |
-
"rope_config": {
|
68 |
-
"dim": 128,
|
69 |
-
"max_seq_len": 2048,
|
70 |
-
"theta": 10000.0
|
71 |
-
},
|
72 |
-
"use_glu_in_ffn": true,
|
73 |
-
"use_gradient_checkpointing": false,
|
74 |
-
"vocab_size": 32000
|
75 |
-
},
|
76 |
-
"model_type": "ChatNT",
|
77 |
"perceiver_resampler_config": {
|
78 |
"add_bias_ffn": true,
|
79 |
"add_bias_kv": false,
|
|
|
7 |
"AutoModel": "chatNT.TorchMultiOmicsModel"
|
8 |
},
|
9 |
"bio_pad_token_id": 1,
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
10 |
"english_pad_token_id": 2,
|
11 |
+
"gpt_config": {
|
12 |
+
"add_bias_attn": false,
|
13 |
+
"add_bias_ffn": false,
|
14 |
+
"add_bias_lm_head": false,
|
15 |
+
"embed_dim": 4096,
|
16 |
+
"eos_token_id": 2,
|
17 |
+
"ffn_activation_name": "silu",
|
18 |
+
"ffn_embed_dim": 11008,
|
19 |
+
"norm_type": "RMS_norm",
|
20 |
+
"num_heads": 32,
|
21 |
+
"num_kv_heads": 32,
|
22 |
+
"num_layers": 32,
|
23 |
+
"parallel_attention_ff": false,
|
24 |
+
"rms_norm_eps": 1e-06,
|
25 |
+
"rope_config": {
|
26 |
+
"dim": 128,
|
27 |
+
"max_seq_len": 2048,
|
28 |
+
"theta": 10000.0
|
29 |
+
},
|
30 |
+
"use_glu_in_ffn": true,
|
31 |
+
"use_gradient_checkpointing": false,
|
32 |
+
"vocab_size": 32000
|
33 |
+
},
|
34 |
+
"model_type": "ChatNT",
|
35 |
+
"nt_config": {
|
36 |
"add_bias_ffn": false,
|
37 |
"add_bias_kv": false,
|
38 |
"alphabet_size": 4107,
|
|
|
65 |
"use_gradient_checkpointing": false,
|
66 |
"use_rotary_embedding": true
|
67 |
},
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
68 |
"perceiver_resampler_config": {
|
69 |
"add_bias_ffn": true,
|
70 |
"add_bias_kv": false,
|
model-00001-of-00004.safetensors
ADDED
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
1 |
+
version https://git-lfs.github.com/spec/v1
|
2 |
+
oid sha256:08ad2c4dfd29e6d52694c7a6e2888d8904bad60eb7bf8979832dbc14802c6988
|
3 |
+
size 4998275134
|
model-00002-of-00004.safetensors
ADDED
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
1 |
+
version https://git-lfs.github.com/spec/v1
|
2 |
+
oid sha256:187615f3a8661430364e2e824d5b0a0363c9cf5b3d8512f33c44015b0be27343
|
3 |
+
size 4890784808
|
model-00003-of-00004.safetensors
ADDED
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
1 |
+
version https://git-lfs.github.com/spec/v1
|
2 |
+
oid sha256:916b86538557669e3a74c00d4d58ae44e494c4439aba8c2d6ee51baf05f62ebe
|
3 |
+
size 4985672264
|
model-00004-of-00004.safetensors
ADDED
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
1 |
+
version https://git-lfs.github.com/spec/v1
|
2 |
+
oid sha256:8524670292b2f477cd558fd76b3372840949dadd0b0a6c386519b05a82faebe6
|
3 |
+
size 1212565848
|
model.safetensors.index.json
ADDED
@@ -0,0 +1,763 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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|
|
|
|
|
|
|
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|
|
|
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|
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|
|
|
|
|
|
|
|
|
|
|
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|
|
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|
|
|
|
|
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|
|
|
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|
|
|
|
|
|
|
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|
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|
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|
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|
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|
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