Upload folder using huggingface_hub
Browse files- config.json +49 -0
- configuration_qwen.py +65 -0
- generation_config.json +11 -0
- modeling_qwen.py +1264 -0
- pytorch_model-00001-of-00010.bin +3 -0
- pytorch_model-00002-of-00010.bin +3 -0
- pytorch_model-00003-of-00010.bin +3 -0
- pytorch_model-00004-of-00010.bin +3 -0
- pytorch_model-00005-of-00010.bin +3 -0
- pytorch_model-00006-of-00010.bin +3 -0
- pytorch_model-00007-of-00010.bin +3 -0
- pytorch_model-00008-of-00010.bin +3 -0
- pytorch_model-00009-of-00010.bin +3 -0
- pytorch_model-00010-of-00010.bin +3 -0
- pytorch_model.bin.index.json +860 -0
- qwen_generation_utils.py +420 -0
- visual.py +375 -0
config.json
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{
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"_name_or_path": "./",
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"architectures": [
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"QWenLMHeadModel"
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],
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"attn_dropout_prob": 0.0,
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"auto_map": {
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"AutoConfig": "configuration_qwen.QWenConfig",
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"AutoModelForCausalLM": "modeling_qwen.QWenLMHeadModel"
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},
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"bf16": true,
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"emb_dropout_prob": 0.0,
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"fp16": false,
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"fp32": false,
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"hidden_size": 4096,
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"initializer_range": 0.02,
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"intermediate_size": 22016,
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"kv_channels": 128,
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"layer_norm_epsilon": 1e-06,
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"max_position_embeddings": 8192,
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"model_type": "qwen",
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"no_bias": true,
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"num_attention_heads": 32,
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"num_hidden_layers": 32,
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"onnx_safe": null,
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"rotary_emb_base": 10000,
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"rotary_pct": 1.0,
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"scale_attn_weights": true,
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"seq_length": 2048,
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"tie_word_embeddings": false,
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"tokenizer_type": "QWenTokenizer",
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"torch_dtype": "bfloat16",
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"transformers_version": "4.31.0",
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"use_cache": true,
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"use_dynamic_ntk": true,
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"use_flash_attn": false,
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"use_logn_attn": true,
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"visual": {
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"heads": 16,
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"image_size": 448,
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"image_start_id": 151857,
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"layers": 48,
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"mlp_ratio": 4.9231,
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"output_dim": 4096,
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"patch_size": 14,
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"width": 1664
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},
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"vocab_size": 151936
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}
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configuration_qwen.py
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# Copyright (c) Alibaba Cloud.
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#
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# This source code is licensed under the license found in the
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# LICENSE file in the root directory of this source tree.
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from transformers import PretrainedConfig
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class QWenConfig(PretrainedConfig):
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model_type = "qwen"
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keys_to_ignore_at_inference = ["past_key_values"]
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def __init__(
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self,
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vocab_size=151936,
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hidden_size=4096,
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num_hidden_layers=32,
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num_attention_heads=32,
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emb_dropout_prob=0.0,
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attn_dropout_prob=0.0,
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layer_norm_epsilon=1e-6,
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initializer_range=0.02,
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max_position_embeddings=8192,
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scale_attn_weights=True,
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use_cache=True,
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bf16=False,
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fp16=False,
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fp32=False,
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kv_channels=128,
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rotary_pct=1.0,
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rotary_emb_base=10000,
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use_dynamic_ntk=True,
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use_logn_attn=True,
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use_flash_attn="auto",
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intermediate_size=22016,
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no_bias=True,
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tie_word_embeddings=False,
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**kwargs,
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):
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self.vocab_size = vocab_size
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self.hidden_size = hidden_size
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self.intermediate_size = intermediate_size
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self.num_hidden_layers = num_hidden_layers
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self.num_attention_heads = num_attention_heads
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self.emb_dropout_prob = emb_dropout_prob
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self.attn_dropout_prob = attn_dropout_prob
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self.layer_norm_epsilon = layer_norm_epsilon
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self.initializer_range = initializer_range
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self.scale_attn_weights = scale_attn_weights
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self.use_cache = use_cache
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self.max_position_embeddings = max_position_embeddings
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self.bf16 = bf16
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self.fp16 = fp16
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self.fp32 = fp32
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self.kv_channels = kv_channels
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self.rotary_pct = rotary_pct
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self.rotary_emb_base = rotary_emb_base
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self.use_dynamic_ntk = use_dynamic_ntk
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self.use_logn_attn = use_logn_attn
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self.use_flash_attn = use_flash_attn
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self.no_bias = no_bias
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super().__init__(
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tie_word_embeddings=tie_word_embeddings,
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**kwargs
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)
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generation_config.json
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{
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"chat_format": "chatml",
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"do_sample": true,
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"eos_token_id": 151643,
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"max_new_tokens": 512,
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"max_window_size": 6144,
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"pad_token_id": 151643,
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"top_k": 0,
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"top_p": 0.4,
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"transformers_version": "4.31.0"
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}
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modeling_qwen.py
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|
| 1 |
+
# Copyright (c) Alibaba Cloud.
|
| 2 |
+
#
|
| 3 |
+
# This source code is licensed under the license found in the
|
| 4 |
+
# LICENSE file in the root directory of this source tree.
|
| 5 |
+
|
| 6 |
+
import importlib
|
| 7 |
+
import math
|
| 8 |
+
from typing import TYPE_CHECKING, Optional, Tuple, Union, Callable, List, Any, Generator
|
| 9 |
+
|
| 10 |
+
import torch
|
| 11 |
+
import torch.nn.functional as F
|
| 12 |
+
import torch.utils.checkpoint
|
| 13 |
+
from torch.cuda.amp import autocast
|
| 14 |
+
|
| 15 |
+
from torch.nn import CrossEntropyLoss
|
| 16 |
+
from transformers import PreTrainedTokenizer, GenerationConfig, StoppingCriteriaList
|
| 17 |
+
from transformers.generation.logits_process import LogitsProcessorList
|
| 18 |
+
|
| 19 |
+
if TYPE_CHECKING:
|
| 20 |
+
from transformers.generation.streamers import BaseStreamer
|
| 21 |
+
from transformers.generation.utils import GenerateOutput
|
| 22 |
+
from transformers.modeling_outputs import (
|
| 23 |
+
BaseModelOutputWithPast,
|
| 24 |
+
CausalLMOutputWithPast,
|
| 25 |
+
)
|
| 26 |
+
from transformers.modeling_utils import PreTrainedModel
|
| 27 |
+
from transformers.utils import logging
|
| 28 |
+
|
| 29 |
+
try:
|
| 30 |
+
from einops import rearrange
|
| 31 |
+
except ImportError:
|
| 32 |
+
rearrange = None
|
| 33 |
+
from torch import nn
|
| 34 |
+
|
| 35 |
+
SUPPORT_CUDA = torch.cuda.is_available()
|
| 36 |
+
SUPPORT_BF16 = SUPPORT_CUDA and torch.cuda.is_bf16_supported()
|
| 37 |
+
SUPPORT_FP16 = SUPPORT_CUDA and torch.cuda.get_device_capability(0)[0] >= 7
|
| 38 |
+
|
| 39 |
+
from .configuration_qwen import QWenConfig
|
| 40 |
+
from .qwen_generation_utils import (
|
| 41 |
+
HistoryType,
|
| 42 |
+
make_context,
|
| 43 |
+
decode_tokens,
|
| 44 |
+
get_stop_words_ids,
|
| 45 |
+
StopWordsLogitsProcessor,
|
| 46 |
+
)
|
| 47 |
+
from .visual import VisionTransformer
|
| 48 |
+
|
| 49 |
+
|
| 50 |
+
logger = logging.get_logger(__name__)
|
| 51 |
+
|
| 52 |
+
_CHECKPOINT_FOR_DOC = "qwen"
|
| 53 |
+
_CONFIG_FOR_DOC = "QWenConfig"
|
| 54 |
+
|
| 55 |
+
QWen_PRETRAINED_MODEL_ARCHIVE_LIST = ["qwen-7b"]
|
| 56 |
+
|
| 57 |
+
_ERROR_BAD_CHAT_FORMAT = """\
|
| 58 |
+
We detect you are probably using the pretrained model (rather than chat model) for chatting, since the chat_format in generation_config is not "chatml".
|
| 59 |
+
If you are directly using the model downloaded from Huggingface, please make sure you are using our "Qwen/Qwen-7B-Chat" Huggingface model (rather than "Qwen/Qwen-7B") when you call model.chat().
|
| 60 |
+
我们检测到您可能在使用预训练模型(而非chat模型)进行多轮chat,因为您当前在generation_config指定的chat_format,并未设置为我们在对话中所支持的"chatml"格式。
|
| 61 |
+
如果您在直接使用我们从Huggingface提供的模型,请确保您在调用model.chat()时,使用的是"Qwen/Qwen-7B-Chat"模型(而非"Qwen/Qwen-7B"预训练模型)。
|
| 62 |
+
"""
|
| 63 |
+
|
| 64 |
+
_SENTINEL = object()
|
| 65 |
+
_ERROR_STREAM_IN_CHAT = """\
|
| 66 |
+
Pass argument `stream` to model.chat() is buggy, deprecated, and marked for removal. Please use model.chat_stream(...) instead of model.chat(..., stream=True).
|
| 67 |
+
向model.chat()传入参数stream的用法可能存在Bug,该用法已被废弃,将在未来被移除。请使用model.chat_stream(...)代替model.chat(..., stream=True)。
|
| 68 |
+
"""
|
| 69 |
+
|
| 70 |
+
apply_rotary_emb_func = None
|
| 71 |
+
rms_norm = None
|
| 72 |
+
flash_attn_unpadded_func = None
|
| 73 |
+
|
| 74 |
+
|
| 75 |
+
def _import_flash_attn():
|
| 76 |
+
global apply_rotary_emb_func, rms_norm, flash_attn_unpadded_func
|
| 77 |
+
try:
|
| 78 |
+
from flash_attn.layers.rotary import apply_rotary_emb_func as __apply_rotary_emb_func
|
| 79 |
+
apply_rotary_emb_func = __apply_rotary_emb_func
|
| 80 |
+
except ImportError:
|
| 81 |
+
logger.warn(
|
| 82 |
+
"Warning: import flash_attn rotary fail, please install FlashAttention rotary to get higher efficiency "
|
| 83 |
+
"https://github.com/Dao-AILab/flash-attention/tree/main/csrc/rotary"
|
| 84 |
+
)
|
| 85 |
+
|
| 86 |
+
try:
|
| 87 |
+
from flash_attn.ops.rms_norm import rms_norm as __rms_norm
|
| 88 |
+
rms_norm = __rms_norm
|
| 89 |
+
except ImportError:
|
| 90 |
+
logger.warn(
|
| 91 |
+
"Warning: import flash_attn rms_norm fail, please install FlashAttention layer_norm to get higher efficiency "
|
| 92 |
+
"https://github.com/Dao-AILab/flash-attention/tree/main/csrc/layer_norm"
|
| 93 |
+
)
|
| 94 |
+
|
| 95 |
+
try:
|
| 96 |
+
import flash_attn
|
| 97 |
+
if not hasattr(flash_attn, '__version__'):
|
| 98 |
+
from flash_attn.flash_attn_interface import flash_attn_unpadded_func as __flash_attn_unpadded_func
|
| 99 |
+
else:
|
| 100 |
+
if int(flash_attn.__version__.split(".")[0]) >= 2:
|
| 101 |
+
from flash_attn.flash_attn_interface import flash_attn_varlen_func as __flash_attn_unpadded_func
|
| 102 |
+
else:
|
| 103 |
+
from flash_attn.flash_attn_interface import flash_attn_unpadded_func as __flash_attn_unpadded_func
|
| 104 |
+
flash_attn_unpadded_func = __flash_attn_unpadded_func
|
| 105 |
+
except ImportError:
|
| 106 |
+
logger.warn(
|
| 107 |
+
"Warning: import flash_attn fail, please install FlashAttention to get higher efficiency "
|
| 108 |
+
"https://github.com/Dao-AILab/flash-attention"
|
| 109 |
+
)
|
| 110 |
+
|
| 111 |
+
# Copied from transformers.models.bart.modeling_bart._make_causal_mask
|
| 112 |
+
def _make_causal_mask(
|
| 113 |
+
input_ids_shape: torch.Size, dtype: torch.dtype, device: torch.device, past_key_values_length: int = 0
|
| 114 |
+
):
|
| 115 |
+
"""
|
| 116 |
+
Make causal mask used for bi-directional self-attention.
|
| 117 |
+
"""
|
| 118 |
+
bsz, tgt_len = input_ids_shape
|
| 119 |
+
mask = torch.full((tgt_len, tgt_len), torch.finfo(dtype).min, device=device)
|
| 120 |
+
mask_cond = torch.arange(mask.size(-1), device=device)
|
| 121 |
+
mask.masked_fill_(mask_cond < (mask_cond + 1).view(mask.size(-1), 1), 0)
|
| 122 |
+
mask = mask.to(dtype)
|
| 123 |
+
|
| 124 |
+
if past_key_values_length > 0:
|
| 125 |
+
mask = torch.cat([torch.zeros(tgt_len, past_key_values_length, dtype=dtype, device=device), mask], dim=-1)
|
| 126 |
+
return mask[None, None, :, :].expand(bsz, 1, tgt_len, tgt_len + past_key_values_length)
|
| 127 |
+
|
| 128 |
+
|
| 129 |
+
# Copied from transformers.models.bart.modeling_bart._expand_mask
|
| 130 |
+
def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int] = None):
|
| 131 |
+
"""
|
| 132 |
+
Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
|
| 133 |
+
"""
|
| 134 |
+
bsz, src_len = mask.size()
|
| 135 |
+
tgt_len = tgt_len if tgt_len is not None else src_len
|
| 136 |
+
|
| 137 |
+
expanded_mask = mask[:, None, None, :].expand(bsz, 1, tgt_len, src_len).to(dtype)
|
| 138 |
+
|
| 139 |
+
inverted_mask = 1.0 - expanded_mask
|
| 140 |
+
|
| 141 |
+
return inverted_mask.masked_fill(inverted_mask.to(torch.bool), torch.finfo(dtype).min)
|
| 142 |
+
|
| 143 |
+
|
| 144 |
+
class FlashSelfAttention(torch.nn.Module):
|
| 145 |
+
def __init__(
|
| 146 |
+
self,
|
| 147 |
+
causal=False,
|
| 148 |
+
softmax_scale=None,
|
| 149 |
+
attention_dropout=0.0,
|
| 150 |
+
):
|
| 151 |
+
super().__init__()
|
| 152 |
+
assert flash_attn_unpadded_func is not None, (
|
| 153 |
+
"Please install FlashAttention first, " "e.g., with pip install flash-attn"
|
| 154 |
+
)
|
| 155 |
+
assert (
|
| 156 |
+
rearrange is not None
|
| 157 |
+
), "Please install einops first, e.g., with pip install einops"
|
| 158 |
+
self.causal = causal
|
| 159 |
+
self.softmax_scale = softmax_scale
|
| 160 |
+
self.dropout_p = attention_dropout
|
| 161 |
+
|
| 162 |
+
def forward(self, q, k, v):
|
| 163 |
+
assert all((i.dtype in [torch.float16, torch.bfloat16] for i in (q, k, v)))
|
| 164 |
+
assert all((i.is_cuda for i in (q, k, v)))
|
| 165 |
+
batch_size, seqlen_q = q.shape[0], q.shape[1]
|
| 166 |
+
seqlen_k = k.shape[1]
|
| 167 |
+
q, k, v = [rearrange(x, "b s ... -> (b s) ...") for x in [q, k, v]]
|
| 168 |
+
cu_seqlens_q = torch.arange(
|
| 169 |
+
0,
|
| 170 |
+
(batch_size + 1) * seqlen_q,
|
| 171 |
+
step=seqlen_q,
|
| 172 |
+
dtype=torch.int32,
|
| 173 |
+
device=q.device,
|
| 174 |
+
)
|
| 175 |
+
|
| 176 |
+
if self.training:
|
| 177 |
+
assert seqlen_k == seqlen_q
|
| 178 |
+
|
| 179 |
+
is_causal = self.causal
|
| 180 |
+
cu_seqlens_k = cu_seqlens_q
|
| 181 |
+
else:
|
| 182 |
+
is_causal = seqlen_q == seqlen_k
|
| 183 |
+
cu_seqlens_k = torch.arange(
|
| 184 |
+
0,
|
| 185 |
+
(batch_size + 1) * seqlen_k,
|
| 186 |
+
step=seqlen_k,
|
| 187 |
+
dtype=torch.int32,
|
| 188 |
+
device=q.device,
|
| 189 |
+
)
|
| 190 |
+
self.dropout_p = 0
|
| 191 |
+
output = flash_attn_unpadded_func(
|
| 192 |
+
q,
|
| 193 |
+
k,
|
| 194 |
+
v,
|
| 195 |
+
cu_seqlens_q,
|
| 196 |
+
cu_seqlens_k,
|
| 197 |
+
seqlen_q,
|
| 198 |
+
seqlen_k,
|
| 199 |
+
self.dropout_p,
|
| 200 |
+
softmax_scale=self.softmax_scale,
|
| 201 |
+
causal=is_causal,
|
| 202 |
+
)
|
| 203 |
+
|
| 204 |
+
output = rearrange(output, "(b s) ... -> b s ...", b=batch_size)
|
| 205 |
+
return output
|
| 206 |
+
|
| 207 |
+
|
| 208 |
+
class QWenAttention(nn.Module):
|
| 209 |
+
def __init__(self, config):
|
| 210 |
+
super().__init__()
|
| 211 |
+
|
| 212 |
+
max_positions = config.max_position_embeddings
|
| 213 |
+
self.register_buffer(
|
| 214 |
+
"bias",
|
| 215 |
+
torch.tril(
|
| 216 |
+
torch.ones((max_positions, max_positions), dtype=torch.bool)
|
| 217 |
+
).view(1, 1, max_positions, max_positions),
|
| 218 |
+
persistent=False,
|
| 219 |
+
)
|
| 220 |
+
self.register_buffer("masked_bias", torch.tensor(-1e4), persistent=False)
|
| 221 |
+
self.seq_length = config.seq_length
|
| 222 |
+
|
| 223 |
+
self.hidden_size = config.hidden_size
|
| 224 |
+
self.split_size = config.hidden_size
|
| 225 |
+
self.num_heads = config.num_attention_heads
|
| 226 |
+
self.head_dim = self.hidden_size // self.num_heads
|
| 227 |
+
|
| 228 |
+
self.use_flash_attn = config.use_flash_attn
|
| 229 |
+
self.scale_attn_weights = True
|
| 230 |
+
|
| 231 |
+
self.projection_size = config.kv_channels * config.num_attention_heads
|
| 232 |
+
|
| 233 |
+
assert self.projection_size % config.num_attention_heads == 0
|
| 234 |
+
self.hidden_size_per_attention_head = (
|
| 235 |
+
self.projection_size // config.num_attention_heads
|
| 236 |
+
)
|
| 237 |
+
|
| 238 |
+
self.c_attn = nn.Linear(config.hidden_size, 3 * self.projection_size)
|
| 239 |
+
|
| 240 |
+
self.c_proj = nn.Linear(
|
| 241 |
+
config.hidden_size, self.projection_size, bias=not config.no_bias
|
| 242 |
+
)
|
| 243 |
+
|
| 244 |
+
self.is_fp32 = not (config.bf16 or config.fp16)
|
| 245 |
+
if (
|
| 246 |
+
self.use_flash_attn
|
| 247 |
+
and flash_attn_unpadded_func is not None
|
| 248 |
+
and not self.is_fp32
|
| 249 |
+
):
|
| 250 |
+
self.core_attention_flash = FlashSelfAttention(
|
| 251 |
+
causal=True, attention_dropout=config.attn_dropout_prob
|
| 252 |
+
)
|
| 253 |
+
|
| 254 |
+
self.bf16 = config.bf16
|
| 255 |
+
|
| 256 |
+
if config.rotary_pct == 1.0:
|
| 257 |
+
self.rotary_ndims = None
|
| 258 |
+
else:
|
| 259 |
+
assert config.rotary_pct < 1
|
| 260 |
+
self.rotary_ndims = int(
|
| 261 |
+
self.hidden_size_per_attention_head * config.rotary_pct
|
| 262 |
+
)
|
| 263 |
+
dim = (
|
| 264 |
+
self.rotary_ndims
|
| 265 |
+
if self.rotary_ndims is not None
|
| 266 |
+
else self.hidden_size_per_attention_head
|
| 267 |
+
)
|
| 268 |
+
self.rotary_emb = RotaryEmbedding(dim, base=config.rotary_emb_base)
|
| 269 |
+
|
| 270 |
+
self.use_dynamic_ntk = config.use_dynamic_ntk
|
| 271 |
+
self.use_logn_attn = config.use_logn_attn
|
| 272 |
+
|
| 273 |
+
logn_list = [
|
| 274 |
+
math.log(i, self.seq_length) if i > self.seq_length else 1
|
| 275 |
+
for i in range(1, 32768)
|
| 276 |
+
]
|
| 277 |
+
self.logn_tensor = torch.tensor(logn_list)[None, :, None, None]
|
| 278 |
+
self._ntk_cached = 1.0
|
| 279 |
+
|
| 280 |
+
self.attn_dropout = nn.Dropout(config.attn_dropout_prob)
|
| 281 |
+
|
| 282 |
+
def _attn(self, query, key, value, attention_mask=None, head_mask=None):
|
| 283 |
+
attn_weights = torch.matmul(query, key.transpose(-1, -2))
|
| 284 |
+
|
| 285 |
+
if self.scale_attn_weights:
|
| 286 |
+
attn_weights = attn_weights / torch.full(
|
| 287 |
+
[],
|
| 288 |
+
value.size(-1) ** 0.5,
|
| 289 |
+
dtype=attn_weights.dtype,
|
| 290 |
+
device=attn_weights.device,
|
| 291 |
+
)
|
| 292 |
+
|
| 293 |
+
query_length, key_length = query.size(-2), key.size(-2)
|
| 294 |
+
# causal_mask = self.bias[
|
| 295 |
+
# :, :, key_length - query_length : key_length, :key_length
|
| 296 |
+
# ]
|
| 297 |
+
# mask_value = torch.finfo(attn_weights.dtype).min
|
| 298 |
+
# mask_value = torch.full([], mask_value, dtype=attn_weights.dtype).to(
|
| 299 |
+
# attn_weights.device
|
| 300 |
+
# )
|
| 301 |
+
# attn_weights = torch.where(
|
| 302 |
+
# causal_mask, attn_weights.to(attn_weights.dtype), mask_value
|
| 303 |
+
# )
|
| 304 |
+
attn_weights = attn_weights + attention_mask
|
| 305 |
+
|
| 306 |
+
attn_weights = nn.functional.softmax(attn_weights, dim=-1)
|
| 307 |
+
|
| 308 |
+
attn_weights = attn_weights.type(value.dtype)
|
| 309 |
+
attn_weights = self.attn_dropout(attn_weights)
|
| 310 |
+
|
| 311 |
+
if head_mask is not None:
|
| 312 |
+
attn_weights = attn_weights * head_mask
|
| 313 |
+
|
| 314 |
+
attn_output = torch.matmul(attn_weights, value)
|
| 315 |
+
attn_output = attn_output.transpose(1, 2)
|
| 316 |
+
|
| 317 |
+
return attn_output, attn_weights
|
| 318 |
+
|
| 319 |
+
def _upcast_and_reordered_attn(
|
| 320 |
+
self, query, key, value, attention_mask=None, head_mask=None
|
| 321 |
+
):
|
| 322 |
+
bsz, num_heads, q_seq_len, dk = query.size()
|
| 323 |
+
_, _, k_seq_len, _ = key.size()
|
| 324 |
+
|
| 325 |
+
attn_weights = torch.empty(
|
| 326 |
+
bsz * num_heads,
|
| 327 |
+
q_seq_len,
|
| 328 |
+
k_seq_len,
|
| 329 |
+
dtype=torch.float32,
|
| 330 |
+
device=query.device,
|
| 331 |
+
)
|
| 332 |
+
|
| 333 |
+
scale_factor = 1.0
|
| 334 |
+
if self.scale_attn_weights:
|
| 335 |
+
scale_factor /= float(value.size(-1)) ** 0.5
|
| 336 |
+
|
| 337 |
+
with autocast(enabled=False):
|
| 338 |
+
q, k = query.reshape(-1, q_seq_len, dk), key.transpose(-1, -2).reshape(
|
| 339 |
+
-1, dk, k_seq_len
|
| 340 |
+
)
|
| 341 |
+
attn_weights = torch.baddbmm(
|
| 342 |
+
attn_weights, q.float(), k.float(), beta=0, alpha=scale_factor
|
| 343 |
+
)
|
| 344 |
+
attn_weights = attn_weights.reshape(bsz, num_heads, q_seq_len, k_seq_len)
|
| 345 |
+
|
| 346 |
+
query_length, key_length = query.size(-2), key.size(-2)
|
| 347 |
+
causal_mask = self.bias[
|
| 348 |
+
:, :, key_length - query_length : key_length, :key_length
|
| 349 |
+
]
|
| 350 |
+
mask_value = torch.finfo(attn_weights.dtype).min
|
| 351 |
+
mask_value = torch.tensor(mask_value, dtype=attn_weights.dtype).to(
|
| 352 |
+
attn_weights.device
|
| 353 |
+
)
|
| 354 |
+
attn_weights = torch.where(causal_mask, attn_weights, mask_value)
|
| 355 |
+
|
| 356 |
+
if attention_mask is not None:
|
| 357 |
+
attn_weights = attn_weights + attention_mask
|
| 358 |
+
|
| 359 |
+
attn_weights = nn.functional.softmax(attn_weights, dim=-1)
|
| 360 |
+
|
| 361 |
+
if attn_weights.dtype != torch.float32:
|
| 362 |
+
raise RuntimeError(
|
| 363 |
+
"Error with upcasting, attn_weights does not have dtype torch.float32"
|
| 364 |
+
)
|
| 365 |
+
attn_weights = attn_weights.type(value.dtype)
|
| 366 |
+
attn_weights = self.attn_dropout(attn_weights)
|
| 367 |
+
|
| 368 |
+
if head_mask is not None:
|
| 369 |
+
attn_weights = attn_weights * head_mask
|
| 370 |
+
|
| 371 |
+
attn_output = torch.matmul(attn_weights, value)
|
| 372 |
+
|
| 373 |
+
return attn_output, attn_weights
|
| 374 |
+
|
| 375 |
+
def _split_heads(self, tensor, num_heads, attn_head_size):
|
| 376 |
+
new_shape = tensor.size()[:-1] + (num_heads, attn_head_size)
|
| 377 |
+
tensor = tensor.view(new_shape)
|
| 378 |
+
return tensor
|
| 379 |
+
|
| 380 |
+
def _merge_heads(self, tensor, num_heads, attn_head_size):
|
| 381 |
+
tensor = tensor.contiguous()
|
| 382 |
+
new_shape = tensor.size()[:-2] + (num_heads * attn_head_size,)
|
| 383 |
+
return tensor.view(new_shape)
|
| 384 |
+
|
| 385 |
+
def forward(
|
| 386 |
+
self,
|
| 387 |
+
hidden_states: Optional[Tuple[torch.FloatTensor]],
|
| 388 |
+
layer_past: Optional[Tuple[torch.Tensor]] = None,
|
| 389 |
+
attention_mask: Optional[torch.FloatTensor] = None,
|
| 390 |
+
head_mask: Optional[torch.FloatTensor] = None,
|
| 391 |
+
encoder_hidden_states: Optional[torch.Tensor] = None,
|
| 392 |
+
encoder_attention_mask: Optional[torch.FloatTensor] = None,
|
| 393 |
+
output_attentions: Optional[bool] = False,
|
| 394 |
+
use_cache: Optional[bool] = False,
|
| 395 |
+
):
|
| 396 |
+
|
| 397 |
+
mixed_x_layer = self.c_attn(hidden_states)
|
| 398 |
+
query, key, value = mixed_x_layer.split(self.split_size, dim=2)
|
| 399 |
+
|
| 400 |
+
query = self._split_heads(query, self.num_heads, self.head_dim)
|
| 401 |
+
key = self._split_heads(key, self.num_heads, self.head_dim)
|
| 402 |
+
value = self._split_heads(value, self.num_heads, self.head_dim)
|
| 403 |
+
|
| 404 |
+
kv_seq_len = hidden_states.size()[1]
|
| 405 |
+
if layer_past:
|
| 406 |
+
# layer past[0] shape: bs * seq_len * head_num * dim
|
| 407 |
+
kv_seq_len += layer_past[0].shape[1]
|
| 408 |
+
if (
|
| 409 |
+
self.use_dynamic_ntk
|
| 410 |
+
and kv_seq_len == hidden_states.size()[1]
|
| 411 |
+
and not self.training
|
| 412 |
+
):
|
| 413 |
+
context_value = math.log(kv_seq_len / self.seq_length, 2) + 1
|
| 414 |
+
ntk_alpha = 2 ** math.ceil(context_value) - 1
|
| 415 |
+
ntk_alpha = max(ntk_alpha, 1)
|
| 416 |
+
self._ntk_cached = ntk_alpha
|
| 417 |
+
else:
|
| 418 |
+
ntk_alpha = self._ntk_cached
|
| 419 |
+
rotary_pos_emb = self.rotary_emb(kv_seq_len, ntk_alpha=ntk_alpha).to(
|
| 420 |
+
hidden_states.device
|
| 421 |
+
)
|
| 422 |
+
|
| 423 |
+
if rotary_pos_emb is not None:
|
| 424 |
+
if isinstance(rotary_pos_emb, tuple):
|
| 425 |
+
rotary_pos_emb = rotary_pos_emb
|
| 426 |
+
else:
|
| 427 |
+
rotary_pos_emb = (rotary_pos_emb,) * 2
|
| 428 |
+
|
| 429 |
+
if rotary_pos_emb is not None:
|
| 430 |
+
q_pos_emb, k_pos_emb = rotary_pos_emb
|
| 431 |
+
# Slice the pos emb for current inference
|
| 432 |
+
cur_len = query.shape[1]
|
| 433 |
+
q_pos_emb = q_pos_emb[:, -cur_len:, :, :]
|
| 434 |
+
k_pos_emb = k_pos_emb[:, -cur_len:, :, :]
|
| 435 |
+
query = apply_rotary_pos_emb(query, q_pos_emb)
|
| 436 |
+
key = apply_rotary_pos_emb(key, k_pos_emb)
|
| 437 |
+
|
| 438 |
+
if layer_past is not None:
|
| 439 |
+
past_key, past_value = layer_past[0], layer_past[1]
|
| 440 |
+
key = torch.cat((past_key, key), dim=1)
|
| 441 |
+
value = torch.cat((past_value, value), dim=1)
|
| 442 |
+
|
| 443 |
+
if use_cache:
|
| 444 |
+
present = (key, value)
|
| 445 |
+
else:
|
| 446 |
+
present = None
|
| 447 |
+
|
| 448 |
+
if self.use_logn_attn and not self.training:
|
| 449 |
+
if self.logn_tensor.device != query.device or self.logn_tensor.dtype != query.dtype:
|
| 450 |
+
self.logn_tensor = self.logn_tensor.to(query.device).type_as(query)
|
| 451 |
+
seq_start = key.size(1) - query.size(1)
|
| 452 |
+
seq_end = key.size(1)
|
| 453 |
+
logn_tensor = self.logn_tensor[:, seq_start:seq_end, :, :]
|
| 454 |
+
query = query * logn_tensor.expand_as(query)
|
| 455 |
+
|
| 456 |
+
if (
|
| 457 |
+
self.use_flash_attn
|
| 458 |
+
and flash_attn_unpadded_func is not None
|
| 459 |
+
and not self.is_fp32
|
| 460 |
+
and query.is_cuda
|
| 461 |
+
):
|
| 462 |
+
q, k, v = query, key, value
|
| 463 |
+
context_layer = self.core_attention_flash(q, k, v)
|
| 464 |
+
|
| 465 |
+
context_layer = rearrange(
|
| 466 |
+
context_layer, "b s h d -> b s (h d)"
|
| 467 |
+
).contiguous()
|
| 468 |
+
else:
|
| 469 |
+
query = query.permute(0, 2, 1, 3)
|
| 470 |
+
key = key.permute(0, 2, 1, 3)
|
| 471 |
+
value = value.permute(0, 2, 1, 3)
|
| 472 |
+
attn_output, attn_weight = self._attn(
|
| 473 |
+
query, key, value, attention_mask, head_mask
|
| 474 |
+
)
|
| 475 |
+
context_layer = self._merge_heads(
|
| 476 |
+
attn_output, self.num_heads, self.head_dim
|
| 477 |
+
)
|
| 478 |
+
|
| 479 |
+
attn_output = self.c_proj(context_layer)
|
| 480 |
+
outputs = (attn_output, present)
|
| 481 |
+
if output_attentions:
|
| 482 |
+
if (
|
| 483 |
+
self.use_flash_attn
|
| 484 |
+
and flash_attn_unpadded_func is not None
|
| 485 |
+
and not self.is_fp32
|
| 486 |
+
):
|
| 487 |
+
raise ValueError("Cannot output attentions while using flash-attn")
|
| 488 |
+
else:
|
| 489 |
+
outputs += (attn_weight,)
|
| 490 |
+
|
| 491 |
+
return outputs
|
| 492 |
+
|
| 493 |
+
|
| 494 |
+
class QWenMLP(nn.Module):
|
| 495 |
+
def __init__(self, config):
|
| 496 |
+
super().__init__()
|
| 497 |
+
self.w1 = nn.Linear(
|
| 498 |
+
config.hidden_size, config.intermediate_size // 2, bias=not config.no_bias
|
| 499 |
+
)
|
| 500 |
+
self.w2 = nn.Linear(
|
| 501 |
+
config.hidden_size, config.intermediate_size // 2, bias=not config.no_bias
|
| 502 |
+
)
|
| 503 |
+
ff_dim_in = config.intermediate_size // 2
|
| 504 |
+
self.c_proj = nn.Linear(ff_dim_in, config.hidden_size, bias=not config.no_bias)
|
| 505 |
+
|
| 506 |
+
def forward(self, hidden_states):
|
| 507 |
+
a1 = self.w1(hidden_states)
|
| 508 |
+
a2 = self.w2(hidden_states)
|
| 509 |
+
intermediate_parallel = a1 * F.silu(a2)
|
| 510 |
+
output = self.c_proj(intermediate_parallel)
|
| 511 |
+
return output
|
| 512 |
+
|
| 513 |
+
|
| 514 |
+
class QWenBlock(nn.Module):
|
| 515 |
+
def __init__(self, config):
|
| 516 |
+
super().__init__()
|
| 517 |
+
hidden_size = config.hidden_size
|
| 518 |
+
self.bf16 = config.bf16
|
| 519 |
+
|
| 520 |
+
self.ln_1 = RMSNorm(
|
| 521 |
+
hidden_size,
|
| 522 |
+
eps=config.layer_norm_epsilon,
|
| 523 |
+
)
|
| 524 |
+
self.attn = QWenAttention(config)
|
| 525 |
+
self.ln_2 = RMSNorm(
|
| 526 |
+
hidden_size,
|
| 527 |
+
eps=config.layer_norm_epsilon,
|
| 528 |
+
)
|
| 529 |
+
|
| 530 |
+
self.mlp = QWenMLP(config)
|
| 531 |
+
|
| 532 |
+
def forward(
|
| 533 |
+
self,
|
| 534 |
+
hidden_states: Optional[Tuple[torch.FloatTensor]],
|
| 535 |
+
layer_past: Optional[Tuple[torch.Tensor]] = None,
|
| 536 |
+
attention_mask: Optional[torch.FloatTensor] = None,
|
| 537 |
+
head_mask: Optional[torch.FloatTensor] = None,
|
| 538 |
+
encoder_hidden_states: Optional[torch.Tensor] = None,
|
| 539 |
+
encoder_attention_mask: Optional[torch.FloatTensor] = None,
|
| 540 |
+
use_cache: Optional[bool] = False,
|
| 541 |
+
output_attentions: Optional[bool] = False,
|
| 542 |
+
):
|
| 543 |
+
layernorm_output = self.ln_1(hidden_states)
|
| 544 |
+
|
| 545 |
+
attn_outputs = self.attn(
|
| 546 |
+
layernorm_output,
|
| 547 |
+
layer_past=layer_past,
|
| 548 |
+
attention_mask=attention_mask,
|
| 549 |
+
head_mask=head_mask,
|
| 550 |
+
use_cache=use_cache,
|
| 551 |
+
output_attentions=output_attentions,
|
| 552 |
+
)
|
| 553 |
+
attn_output = attn_outputs[0]
|
| 554 |
+
|
| 555 |
+
outputs = attn_outputs[1:]
|
| 556 |
+
|
| 557 |
+
residual = hidden_states
|
| 558 |
+
layernorm_input = attn_output + residual
|
| 559 |
+
|
| 560 |
+
layernorm_output = self.ln_2(layernorm_input)
|
| 561 |
+
|
| 562 |
+
residual = layernorm_input
|
| 563 |
+
mlp_output = self.mlp(layernorm_output)
|
| 564 |
+
hidden_states = residual + mlp_output
|
| 565 |
+
|
| 566 |
+
if use_cache:
|
| 567 |
+
outputs = (hidden_states,) + outputs
|
| 568 |
+
else:
|
| 569 |
+
outputs = (hidden_states,) + outputs[1:]
|
| 570 |
+
|
| 571 |
+
return outputs
|
| 572 |
+
|
| 573 |
+
|
| 574 |
+
class QWenPreTrainedModel(PreTrainedModel):
|
| 575 |
+
config_class = QWenConfig
|
| 576 |
+
base_model_prefix = "transformer"
|
| 577 |
+
is_parallelizable = False
|
| 578 |
+
supports_gradient_checkpointing = True
|
| 579 |
+
_no_split_modules = ["QWenBlock"]
|
| 580 |
+
|
| 581 |
+
def __init__(self, *inputs, **kwargs):
|
| 582 |
+
super().__init__(*inputs, **kwargs)
|
| 583 |
+
|
| 584 |
+
def _init_weights(self, module):
|
| 585 |
+
"""Initialize the weights."""
|
| 586 |
+
if isinstance(module, nn.Linear):
|
| 587 |
+
module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
|
| 588 |
+
if module.bias is not None:
|
| 589 |
+
module.bias.data.zero_()
|
| 590 |
+
elif isinstance(module, nn.Embedding):
|
| 591 |
+
module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
|
| 592 |
+
if module.padding_idx is not None:
|
| 593 |
+
module.weight.data[module.padding_idx].zero_()
|
| 594 |
+
elif isinstance(module, RMSNorm):
|
| 595 |
+
module.weight.data.fill_(1.0)
|
| 596 |
+
|
| 597 |
+
for name, p in module.named_parameters():
|
| 598 |
+
if name == "c_proj.weight":
|
| 599 |
+
p.data.normal_(
|
| 600 |
+
mean=0.0,
|
| 601 |
+
std=(
|
| 602 |
+
self.config.initializer_range
|
| 603 |
+
/ math.sqrt(2 * self.config.num_hidden_layers)
|
| 604 |
+
),
|
| 605 |
+
)
|
| 606 |
+
|
| 607 |
+
def _set_gradient_checkpointing(self, module, value=False):
|
| 608 |
+
if isinstance(module, QWenModel):
|
| 609 |
+
module.gradient_checkpointing = value
|
| 610 |
+
|
| 611 |
+
|
| 612 |
+
class QWenModel(QWenPreTrainedModel):
|
| 613 |
+
_keys_to_ignore_on_load_missing = ["attn.masked_bias"]
|
| 614 |
+
|
| 615 |
+
def __init__(self, config):
|
| 616 |
+
super().__init__(config)
|
| 617 |
+
self.vocab_size = config.vocab_size
|
| 618 |
+
self.num_hidden_layers = config.num_hidden_layers
|
| 619 |
+
self.embed_dim = config.hidden_size
|
| 620 |
+
|
| 621 |
+
self.gradient_checkpointing = False
|
| 622 |
+
|
| 623 |
+
self.wte = nn.Embedding(self.vocab_size, self.embed_dim)
|
| 624 |
+
|
| 625 |
+
self.drop = nn.Dropout(config.emb_dropout_prob)
|
| 626 |
+
self.h = nn.ModuleList(
|
| 627 |
+
[
|
| 628 |
+
QWenBlock(
|
| 629 |
+
config,
|
| 630 |
+
)
|
| 631 |
+
for i in range(config.num_hidden_layers)
|
| 632 |
+
]
|
| 633 |
+
)
|
| 634 |
+
self.ln_f = RMSNorm(
|
| 635 |
+
self.embed_dim,
|
| 636 |
+
eps=config.layer_norm_epsilon,
|
| 637 |
+
)
|
| 638 |
+
|
| 639 |
+
self.visual = VisionTransformer(**config.visual)
|
| 640 |
+
|
| 641 |
+
self.post_init()
|
| 642 |
+
|
| 643 |
+
def get_input_embeddings(self):
|
| 644 |
+
return self.wte
|
| 645 |
+
|
| 646 |
+
def set_input_embeddings(self, new_embeddings):
|
| 647 |
+
self.wte = new_embeddings
|
| 648 |
+
|
| 649 |
+
# Copied from transformers.models.bart.modeling_bart.BartDecoder._prepare_decoder_attention_mask
|
| 650 |
+
def _prepare_decoder_attention_mask(self, attention_mask, input_shape, inputs_embeds, past_key_values_length):
|
| 651 |
+
# create causal mask
|
| 652 |
+
# [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
|
| 653 |
+
combined_attention_mask = None
|
| 654 |
+
if input_shape[-1] > 1:
|
| 655 |
+
combined_attention_mask = _make_causal_mask(
|
| 656 |
+
input_shape,
|
| 657 |
+
inputs_embeds.dtype,
|
| 658 |
+
device=inputs_embeds.device,
|
| 659 |
+
past_key_values_length=past_key_values_length,
|
| 660 |
+
)
|
| 661 |
+
|
| 662 |
+
if attention_mask is not None:
|
| 663 |
+
# [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
|
| 664 |
+
expanded_attn_mask = _expand_mask(attention_mask, inputs_embeds.dtype, tgt_len=input_shape[-1]).to(
|
| 665 |
+
inputs_embeds.device
|
| 666 |
+
)
|
| 667 |
+
combined_attention_mask = (
|
| 668 |
+
expanded_attn_mask if combined_attention_mask is None else expanded_attn_mask + combined_attention_mask
|
| 669 |
+
)
|
| 670 |
+
|
| 671 |
+
return combined_attention_mask
|
| 672 |
+
|
| 673 |
+
|
| 674 |
+
def forward(
|
| 675 |
+
self,
|
| 676 |
+
input_ids: Optional[torch.LongTensor] = None,
|
| 677 |
+
past_key_values: Optional[Tuple[Tuple[torch.Tensor]]] = None,
|
| 678 |
+
attention_mask: Optional[torch.FloatTensor] = None,
|
| 679 |
+
token_type_ids: Optional[torch.LongTensor] = None,
|
| 680 |
+
position_ids: Optional[torch.LongTensor] = None,
|
| 681 |
+
head_mask: Optional[torch.FloatTensor] = None,
|
| 682 |
+
inputs_embeds: Optional[torch.FloatTensor] = None,
|
| 683 |
+
encoder_hidden_states: Optional[torch.Tensor] = None,
|
| 684 |
+
encoder_attention_mask: Optional[torch.FloatTensor] = None,
|
| 685 |
+
use_cache: Optional[bool] = None,
|
| 686 |
+
output_attentions: Optional[bool] = None,
|
| 687 |
+
output_hidden_states: Optional[bool] = None,
|
| 688 |
+
return_dict: Optional[bool] = None,
|
| 689 |
+
):
|
| 690 |
+
if past_key_values is None and torch.any(input_ids == self.config.visual['image_start_id']):
|
| 691 |
+
bos_pos = torch.where(input_ids == self.config.visual['image_start_id'])
|
| 692 |
+
eos_pos = torch.where(input_ids == self.config.visual['image_start_id'] + 1)
|
| 693 |
+
assert (bos_pos[0] == eos_pos[0]).all()
|
| 694 |
+
img_pos = torch.stack((bos_pos[0], bos_pos[1], eos_pos[1]), dim=1)
|
| 695 |
+
images = []
|
| 696 |
+
for i, a, b in img_pos:
|
| 697 |
+
image = input_ids[i][a + 1 : b - 1].tolist()
|
| 698 |
+
image = image[ : image.index(self.config.visual['image_start_id'] + 2)]
|
| 699 |
+
images.append(bytes(image).decode('utf-8'))
|
| 700 |
+
|
| 701 |
+
images = self.visual.encode(images)
|
| 702 |
+
assert images.shape[0] == len(images)
|
| 703 |
+
else:
|
| 704 |
+
images = None
|
| 705 |
+
|
| 706 |
+
output_attentions = (
|
| 707 |
+
output_attentions
|
| 708 |
+
if output_attentions is not None
|
| 709 |
+
else self.config.output_attentions
|
| 710 |
+
)
|
| 711 |
+
output_hidden_states = (
|
| 712 |
+
output_hidden_states
|
| 713 |
+
if output_hidden_states is not None
|
| 714 |
+
else self.config.output_hidden_states
|
| 715 |
+
)
|
| 716 |
+
use_cache = use_cache if use_cache is not None else self.config.use_cache
|
| 717 |
+
return_dict = (
|
| 718 |
+
return_dict if return_dict is not None else self.config.use_return_dict
|
| 719 |
+
)
|
| 720 |
+
|
| 721 |
+
if input_ids is not None and inputs_embeds is not None:
|
| 722 |
+
raise ValueError(
|
| 723 |
+
"You cannot specify both input_ids and inputs_embeds at the same time"
|
| 724 |
+
)
|
| 725 |
+
elif input_ids is not None:
|
| 726 |
+
input_shape = input_ids.size()
|
| 727 |
+
input_ids = input_ids.view(-1, input_shape[-1])
|
| 728 |
+
batch_size = input_ids.shape[0]
|
| 729 |
+
elif inputs_embeds is not None:
|
| 730 |
+
input_shape = inputs_embeds.size()[:-1]
|
| 731 |
+
batch_size = inputs_embeds.shape[0]
|
| 732 |
+
else:
|
| 733 |
+
raise ValueError("You have to specify either input_ids or inputs_embeds")
|
| 734 |
+
|
| 735 |
+
device = input_ids.device if input_ids is not None else inputs_embeds.device
|
| 736 |
+
|
| 737 |
+
if token_type_ids is not None:
|
| 738 |
+
token_type_ids = token_type_ids.view(-1, input_shape[-1])
|
| 739 |
+
if position_ids is not None:
|
| 740 |
+
position_ids = position_ids.view(-1, input_shape[-1])
|
| 741 |
+
|
| 742 |
+
if past_key_values is None:
|
| 743 |
+
past_length = 0
|
| 744 |
+
past_key_values = tuple([None] * len(self.h))
|
| 745 |
+
else:
|
| 746 |
+
past_length = past_key_values[0][0].size(-2)
|
| 747 |
+
|
| 748 |
+
if position_ids is None:
|
| 749 |
+
position_ids = torch.arange(
|
| 750 |
+
past_length,
|
| 751 |
+
input_shape[-1] + past_length,
|
| 752 |
+
dtype=torch.long,
|
| 753 |
+
device=device,
|
| 754 |
+
)
|
| 755 |
+
position_ids = position_ids.unsqueeze(0).view(-1, input_shape[-1])
|
| 756 |
+
|
| 757 |
+
encoder_attention_mask = None
|
| 758 |
+
head_mask = self.get_head_mask(head_mask, self.config.num_hidden_layers)
|
| 759 |
+
|
| 760 |
+
if inputs_embeds is None:
|
| 761 |
+
inputs_embeds = self.wte(input_ids)
|
| 762 |
+
|
| 763 |
+
if batch_size <= 0:
|
| 764 |
+
raise ValueError("batch_size has to be defined and > 0")
|
| 765 |
+
attention_mask = self._prepare_decoder_attention_mask(
|
| 766 |
+
attention_mask, input_shape, inputs_embeds, past_length
|
| 767 |
+
)
|
| 768 |
+
|
| 769 |
+
hidden_states = inputs_embeds
|
| 770 |
+
|
| 771 |
+
hidden_states = self.drop(hidden_states)
|
| 772 |
+
if images is not None:
|
| 773 |
+
for idx, (i, a, b) in enumerate(img_pos):
|
| 774 |
+
hidden_states[i][a + 1 : b] = images[idx]
|
| 775 |
+
output_shape = input_shape + (hidden_states.size(-1),)
|
| 776 |
+
|
| 777 |
+
if self.gradient_checkpointing and self.training:
|
| 778 |
+
if use_cache:
|
| 779 |
+
logger.warning_once(
|
| 780 |
+
"`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`..."
|
| 781 |
+
)
|
| 782 |
+
use_cache = False
|
| 783 |
+
|
| 784 |
+
presents = () if use_cache else None
|
| 785 |
+
all_self_attentions = () if output_attentions else None
|
| 786 |
+
all_hidden_states = () if output_hidden_states else None
|
| 787 |
+
for i, (block, layer_past) in enumerate(zip(self.h, past_key_values)):
|
| 788 |
+
|
| 789 |
+
if output_hidden_states:
|
| 790 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 791 |
+
|
| 792 |
+
if self.gradient_checkpointing and self.training:
|
| 793 |
+
|
| 794 |
+
def create_custom_forward(module):
|
| 795 |
+
def custom_forward(*inputs):
|
| 796 |
+
# None for past_key_value
|
| 797 |
+
return module(*inputs, use_cache, output_attentions)
|
| 798 |
+
|
| 799 |
+
return custom_forward
|
| 800 |
+
|
| 801 |
+
outputs = torch.utils.checkpoint.checkpoint(
|
| 802 |
+
create_custom_forward(block),
|
| 803 |
+
hidden_states,
|
| 804 |
+
None,
|
| 805 |
+
attention_mask,
|
| 806 |
+
head_mask[i],
|
| 807 |
+
encoder_hidden_states,
|
| 808 |
+
encoder_attention_mask,
|
| 809 |
+
)
|
| 810 |
+
else:
|
| 811 |
+
outputs = block(
|
| 812 |
+
hidden_states,
|
| 813 |
+
layer_past=layer_past,
|
| 814 |
+
attention_mask=attention_mask,
|
| 815 |
+
head_mask=head_mask[i],
|
| 816 |
+
encoder_hidden_states=encoder_hidden_states,
|
| 817 |
+
encoder_attention_mask=encoder_attention_mask,
|
| 818 |
+
use_cache=use_cache,
|
| 819 |
+
output_attentions=output_attentions,
|
| 820 |
+
)
|
| 821 |
+
|
| 822 |
+
hidden_states = outputs[0]
|
| 823 |
+
if use_cache is True:
|
| 824 |
+
presents = presents + (outputs[2 if output_attentions else 1],)
|
| 825 |
+
|
| 826 |
+
if output_attentions:
|
| 827 |
+
all_self_attentions = all_self_attentions + (outputs[1],)
|
| 828 |
+
|
| 829 |
+
hidden_states = self.ln_f(hidden_states)
|
| 830 |
+
hidden_states = hidden_states.view(output_shape)
|
| 831 |
+
# Add last hidden state
|
| 832 |
+
if output_hidden_states:
|
| 833 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 834 |
+
|
| 835 |
+
if not return_dict:
|
| 836 |
+
return tuple(
|
| 837 |
+
v for v in [hidden_states, presents, all_hidden_states] if v is not None
|
| 838 |
+
)
|
| 839 |
+
|
| 840 |
+
return BaseModelOutputWithPast(
|
| 841 |
+
last_hidden_state=hidden_states,
|
| 842 |
+
past_key_values=presents,
|
| 843 |
+
hidden_states=all_hidden_states,
|
| 844 |
+
attentions=all_self_attentions,
|
| 845 |
+
)
|
| 846 |
+
|
| 847 |
+
|
| 848 |
+
class QWenLMHeadModel(QWenPreTrainedModel):
|
| 849 |
+
_keys_to_ignore_on_load_missing = [r"h\.\d+\.attn\.rotary_emb\.inv_freq"]
|
| 850 |
+
_keys_to_ignore_on_load_unexpected = [r"h\.\d+\.attn\.masked_bias"]
|
| 851 |
+
|
| 852 |
+
def __init__(self, config):
|
| 853 |
+
super().__init__(config)
|
| 854 |
+
assert (
|
| 855 |
+
config.bf16 + config.fp16 + config.fp32 <= 1
|
| 856 |
+
), "Only one of \"bf16\", \"fp16\", \"fp32\" can be true"
|
| 857 |
+
|
| 858 |
+
autoset_precision = config.bf16 + config.fp16 + config.fp32 == 0
|
| 859 |
+
|
| 860 |
+
if autoset_precision:
|
| 861 |
+
if SUPPORT_BF16:
|
| 862 |
+
logger.warn(
|
| 863 |
+
"The model is automatically converting to bf16 for faster inference. "
|
| 864 |
+
"If you want to disable the automatic precision, please manually add bf16/fp16/fp32=True to \"AutoModelForCausalLM.from_pretrained\"."
|
| 865 |
+
)
|
| 866 |
+
config.bf16 = True
|
| 867 |
+
elif SUPPORT_FP16:
|
| 868 |
+
logger.warn(
|
| 869 |
+
"The model is automatically converting to fp16 for faster inference. "
|
| 870 |
+
"If you want to disable the automatic precision, please manually add bf16/fp16/fp32=True to \"AutoModelForCausalLM.from_pretrained\"."
|
| 871 |
+
)
|
| 872 |
+
config.fp16 = True
|
| 873 |
+
else:
|
| 874 |
+
config.fp32 = True
|
| 875 |
+
|
| 876 |
+
if config.bf16 and SUPPORT_CUDA and not SUPPORT_BF16:
|
| 877 |
+
logger.warn("Your device does NOT seem to support bf16, you can switch to fp16 or fp32 by by passing fp16/fp32=True in \"AutoModelForCausalLM.from_pretrained\".")
|
| 878 |
+
if config.fp16 and SUPPORT_CUDA and not SUPPORT_FP16:
|
| 879 |
+
logger.warn("Your device does NOT support faster inference with fp16, please switch to fp32 which is likely to be faster")
|
| 880 |
+
if config.fp32:
|
| 881 |
+
if SUPPORT_BF16:
|
| 882 |
+
logger.warn("Your device support faster inference by passing bf16=True in \"AutoModelForCausalLM.from_pretrained\".")
|
| 883 |
+
elif SUPPORT_FP16:
|
| 884 |
+
logger.warn("Your device support faster inference by passing fp16=True in \"AutoModelForCausalLM.from_pretrained\".")
|
| 885 |
+
|
| 886 |
+
if config.use_flash_attn == "auto":
|
| 887 |
+
if config.bf16 or config.fp16:
|
| 888 |
+
logger.warn("Try importing flash-attention for faster inference...")
|
| 889 |
+
config.use_flash_attn = True
|
| 890 |
+
else:
|
| 891 |
+
config.use_flash_attn = False
|
| 892 |
+
if config.use_flash_attn and config.fp32:
|
| 893 |
+
logger.warn("Flash attention will be disabled because it does NOT support fp32.")
|
| 894 |
+
|
| 895 |
+
if config.use_flash_attn:
|
| 896 |
+
_import_flash_attn()
|
| 897 |
+
|
| 898 |
+
self.transformer = QWenModel(config)
|
| 899 |
+
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
| 900 |
+
|
| 901 |
+
if config.bf16:
|
| 902 |
+
self.transformer.bfloat16()
|
| 903 |
+
self.lm_head.bfloat16()
|
| 904 |
+
if config.fp16:
|
| 905 |
+
self.transformer.half()
|
| 906 |
+
self.lm_head.half()
|
| 907 |
+
self.post_init()
|
| 908 |
+
|
| 909 |
+
def get_output_embeddings(self):
|
| 910 |
+
return self.lm_head
|
| 911 |
+
|
| 912 |
+
def set_output_embeddings(self, new_embeddings):
|
| 913 |
+
self.lm_head = new_embeddings
|
| 914 |
+
|
| 915 |
+
def prepare_inputs_for_generation(
|
| 916 |
+
self, input_ids, past_key_values=None, inputs_embeds=None, **kwargs
|
| 917 |
+
):
|
| 918 |
+
token_type_ids = kwargs.get("token_type_ids", None)
|
| 919 |
+
if past_key_values:
|
| 920 |
+
input_ids = input_ids[:, -1].unsqueeze(-1)
|
| 921 |
+
if token_type_ids is not None:
|
| 922 |
+
token_type_ids = token_type_ids[:, -1].unsqueeze(-1)
|
| 923 |
+
|
| 924 |
+
attention_mask = kwargs.get("attention_mask", None)
|
| 925 |
+
position_ids = kwargs.get("position_ids", None)
|
| 926 |
+
|
| 927 |
+
if attention_mask is not None and position_ids is None:
|
| 928 |
+
position_ids = attention_mask.long().cumsum(-1) - 1
|
| 929 |
+
position_ids.masked_fill_(attention_mask == 0, 1)
|
| 930 |
+
if past_key_values:
|
| 931 |
+
position_ids = position_ids[:, -1].unsqueeze(-1)
|
| 932 |
+
else:
|
| 933 |
+
position_ids = None
|
| 934 |
+
|
| 935 |
+
if inputs_embeds is not None and past_key_values is None:
|
| 936 |
+
model_inputs = {"inputs_embeds": inputs_embeds}
|
| 937 |
+
else:
|
| 938 |
+
model_inputs = {"input_ids": input_ids}
|
| 939 |
+
|
| 940 |
+
model_inputs.update(
|
| 941 |
+
{
|
| 942 |
+
"past_key_values": past_key_values,
|
| 943 |
+
"use_cache": kwargs.get("use_cache"),
|
| 944 |
+
"position_ids": position_ids,
|
| 945 |
+
"attention_mask": attention_mask,
|
| 946 |
+
"token_type_ids": token_type_ids,
|
| 947 |
+
}
|
| 948 |
+
)
|
| 949 |
+
return model_inputs
|
| 950 |
+
|
| 951 |
+
def forward(
|
| 952 |
+
self,
|
| 953 |
+
input_ids: Optional[torch.LongTensor] = None,
|
| 954 |
+
past_key_values: Optional[Tuple[Tuple[torch.Tensor]]] = None,
|
| 955 |
+
attention_mask: Optional[torch.FloatTensor] = None,
|
| 956 |
+
token_type_ids: Optional[torch.LongTensor] = None,
|
| 957 |
+
position_ids: Optional[torch.LongTensor] = None,
|
| 958 |
+
head_mask: Optional[torch.FloatTensor] = None,
|
| 959 |
+
inputs_embeds: Optional[torch.FloatTensor] = None,
|
| 960 |
+
encoder_hidden_states: Optional[torch.Tensor] = None,
|
| 961 |
+
encoder_attention_mask: Optional[torch.FloatTensor] = None,
|
| 962 |
+
labels: Optional[torch.LongTensor] = None,
|
| 963 |
+
use_cache: Optional[bool] = None,
|
| 964 |
+
output_attentions: Optional[bool] = None,
|
| 965 |
+
output_hidden_states: Optional[bool] = None,
|
| 966 |
+
return_dict: Optional[bool] = None,
|
| 967 |
+
) -> Union[Tuple, CausalLMOutputWithPast]:
|
| 968 |
+
|
| 969 |
+
return_dict = (
|
| 970 |
+
return_dict if return_dict is not None else self.config.use_return_dict
|
| 971 |
+
)
|
| 972 |
+
|
| 973 |
+
transformer_outputs = self.transformer(
|
| 974 |
+
input_ids,
|
| 975 |
+
past_key_values=past_key_values,
|
| 976 |
+
attention_mask=attention_mask,
|
| 977 |
+
token_type_ids=token_type_ids,
|
| 978 |
+
position_ids=position_ids,
|
| 979 |
+
head_mask=head_mask,
|
| 980 |
+
inputs_embeds=inputs_embeds,
|
| 981 |
+
encoder_hidden_states=encoder_hidden_states,
|
| 982 |
+
encoder_attention_mask=encoder_attention_mask,
|
| 983 |
+
use_cache=use_cache,
|
| 984 |
+
output_attentions=output_attentions,
|
| 985 |
+
output_hidden_states=output_hidden_states,
|
| 986 |
+
return_dict=return_dict,
|
| 987 |
+
)
|
| 988 |
+
hidden_states = transformer_outputs[0]
|
| 989 |
+
|
| 990 |
+
lm_logits = self.lm_head(hidden_states)
|
| 991 |
+
|
| 992 |
+
loss = None
|
| 993 |
+
if labels is not None:
|
| 994 |
+
labels = labels.to(lm_logits.device)
|
| 995 |
+
shift_logits = lm_logits[..., :-1, :].contiguous()
|
| 996 |
+
shift_labels = labels[..., 1:].contiguous()
|
| 997 |
+
loss_fct = CrossEntropyLoss()
|
| 998 |
+
loss = loss_fct(
|
| 999 |
+
shift_logits.view(-1, shift_logits.size(-1)), shift_labels.view(-1)
|
| 1000 |
+
)
|
| 1001 |
+
|
| 1002 |
+
if not return_dict:
|
| 1003 |
+
output = (lm_logits,) + transformer_outputs[1:]
|
| 1004 |
+
return ((loss,) + output) if loss is not None else output
|
| 1005 |
+
|
| 1006 |
+
return CausalLMOutputWithPast(
|
| 1007 |
+
loss=loss,
|
| 1008 |
+
logits=lm_logits,
|
| 1009 |
+
past_key_values=transformer_outputs.past_key_values,
|
| 1010 |
+
hidden_states=transformer_outputs.hidden_states,
|
| 1011 |
+
attentions=transformer_outputs.attentions,
|
| 1012 |
+
)
|
| 1013 |
+
|
| 1014 |
+
@staticmethod
|
| 1015 |
+
def _reorder_cache(
|
| 1016 |
+
past_key_values: Tuple[Tuple[torch.Tensor]], beam_idx: torch.Tensor
|
| 1017 |
+
) -> Tuple[Tuple[torch.Tensor]]:
|
| 1018 |
+
|
| 1019 |
+
return tuple(
|
| 1020 |
+
tuple(
|
| 1021 |
+
past_state.index_select(0, beam_idx.to(past_state.device))
|
| 1022 |
+
for past_state in layer_past
|
| 1023 |
+
)
|
| 1024 |
+
for layer_past in past_key_values
|
| 1025 |
+
)
|
| 1026 |
+
|
| 1027 |
+
def chat(
|
| 1028 |
+
self,
|
| 1029 |
+
tokenizer: PreTrainedTokenizer,
|
| 1030 |
+
query: str,
|
| 1031 |
+
history: Optional[HistoryType],
|
| 1032 |
+
system: str = "You are a helpful assistant.",
|
| 1033 |
+
append_history: bool = True,
|
| 1034 |
+
stream: Optional[bool] = _SENTINEL,
|
| 1035 |
+
stop_words_ids: Optional[List[List[int]]] = None,
|
| 1036 |
+
**kwargs,
|
| 1037 |
+
) -> Tuple[str, HistoryType]:
|
| 1038 |
+
assert stream is _SENTINEL, _ERROR_STREAM_IN_CHAT
|
| 1039 |
+
assert self.generation_config.chat_format == 'chatml', _ERROR_BAD_CHAT_FORMAT
|
| 1040 |
+
if history is None:
|
| 1041 |
+
history = []
|
| 1042 |
+
if stop_words_ids is None:
|
| 1043 |
+
stop_words_ids = []
|
| 1044 |
+
|
| 1045 |
+
max_window_size = kwargs.get('max_window_size', None)
|
| 1046 |
+
if max_window_size is None:
|
| 1047 |
+
max_window_size = self.generation_config.max_window_size
|
| 1048 |
+
raw_text, context_tokens = make_context(
|
| 1049 |
+
tokenizer,
|
| 1050 |
+
query,
|
| 1051 |
+
history=history,
|
| 1052 |
+
system=system,
|
| 1053 |
+
max_window_size=max_window_size,
|
| 1054 |
+
chat_format=self.generation_config.chat_format,
|
| 1055 |
+
)
|
| 1056 |
+
|
| 1057 |
+
stop_words_ids.extend(get_stop_words_ids(
|
| 1058 |
+
self.generation_config.chat_format, tokenizer
|
| 1059 |
+
))
|
| 1060 |
+
input_ids = torch.tensor([context_tokens]).to(self.device)
|
| 1061 |
+
outputs = self.generate(
|
| 1062 |
+
input_ids,
|
| 1063 |
+
stop_words_ids = stop_words_ids,
|
| 1064 |
+
return_dict_in_generate = False,
|
| 1065 |
+
**kwargs,
|
| 1066 |
+
)
|
| 1067 |
+
|
| 1068 |
+
response = decode_tokens(
|
| 1069 |
+
outputs[0],
|
| 1070 |
+
tokenizer,
|
| 1071 |
+
raw_text_len=len(raw_text),
|
| 1072 |
+
context_length=len(context_tokens),
|
| 1073 |
+
chat_format=self.generation_config.chat_format,
|
| 1074 |
+
verbose=False,
|
| 1075 |
+
errors='replace'
|
| 1076 |
+
)
|
| 1077 |
+
|
| 1078 |
+
if append_history:
|
| 1079 |
+
history.append((query, response))
|
| 1080 |
+
|
| 1081 |
+
return response, history
|
| 1082 |
+
|
| 1083 |
+
def chat_stream(
|
| 1084 |
+
self,
|
| 1085 |
+
tokenizer: PreTrainedTokenizer,
|
| 1086 |
+
query: str,
|
| 1087 |
+
history: Optional[HistoryType],
|
| 1088 |
+
system: str = "You are a helpful assistant.",
|
| 1089 |
+
stop_words_ids: Optional[List[List[int]]] = None,
|
| 1090 |
+
logits_processor: Optional[LogitsProcessorList] = None,
|
| 1091 |
+
**kwargs,
|
| 1092 |
+
) -> Generator[str, Any, None]:
|
| 1093 |
+
assert self.generation_config.chat_format == 'chatml', _ERROR_BAD_CHAT_FORMAT
|
| 1094 |
+
if history is None:
|
| 1095 |
+
history = []
|
| 1096 |
+
if stop_words_ids is None:
|
| 1097 |
+
stop_words_ids = []
|
| 1098 |
+
|
| 1099 |
+
max_window_size = kwargs.get('max_window_size', None)
|
| 1100 |
+
if max_window_size is None:
|
| 1101 |
+
max_window_size = self.generation_config.max_window_size
|
| 1102 |
+
raw_text, context_tokens = make_context(
|
| 1103 |
+
tokenizer,
|
| 1104 |
+
query,
|
| 1105 |
+
history=history,
|
| 1106 |
+
system=system,
|
| 1107 |
+
max_window_size=max_window_size,
|
| 1108 |
+
chat_format=self.generation_config.chat_format,
|
| 1109 |
+
)
|
| 1110 |
+
|
| 1111 |
+
stop_words_ids.extend(get_stop_words_ids(
|
| 1112 |
+
self.generation_config.chat_format, tokenizer
|
| 1113 |
+
))
|
| 1114 |
+
if stop_words_ids is not None:
|
| 1115 |
+
stop_words_logits_processor = StopWordsLogitsProcessor(
|
| 1116 |
+
stop_words_ids=stop_words_ids,
|
| 1117 |
+
eos_token_id=self.generation_config.eos_token_id,
|
| 1118 |
+
)
|
| 1119 |
+
if logits_processor is None:
|
| 1120 |
+
logits_processor = LogitsProcessorList([stop_words_logits_processor])
|
| 1121 |
+
else:
|
| 1122 |
+
logits_processor.append(stop_words_logits_processor)
|
| 1123 |
+
input_ids = torch.tensor([context_tokens]).to(self.device)
|
| 1124 |
+
|
| 1125 |
+
from transformers_stream_generator.main import NewGenerationMixin, StreamGenerationConfig
|
| 1126 |
+
self.__class__.generate_stream = NewGenerationMixin.generate
|
| 1127 |
+
self.__class__.sample_stream = NewGenerationMixin.sample_stream
|
| 1128 |
+
stream_config = StreamGenerationConfig(**self.generation_config.to_dict(), do_stream=True)
|
| 1129 |
+
def stream_generator():
|
| 1130 |
+
outputs = []
|
| 1131 |
+
for token in self.generate_stream(
|
| 1132 |
+
input_ids,
|
| 1133 |
+
return_dict_in_generate=False,
|
| 1134 |
+
generation_config=stream_config,
|
| 1135 |
+
logits_processor=logits_processor,
|
| 1136 |
+
seed=-1,
|
| 1137 |
+
**kwargs):
|
| 1138 |
+
outputs.append(token.item())
|
| 1139 |
+
yield tokenizer.decode(outputs, skip_special_tokens=True, errors='ignore')
|
| 1140 |
+
|
| 1141 |
+
return stream_generator()
|
| 1142 |
+
|
| 1143 |
+
def generate(
|
| 1144 |
+
self,
|
| 1145 |
+
inputs: Optional[torch.Tensor] = None,
|
| 1146 |
+
generation_config: Optional[GenerationConfig] = None,
|
| 1147 |
+
logits_processor: Optional[LogitsProcessorList] = None,
|
| 1148 |
+
stopping_criteria: Optional[StoppingCriteriaList] = None,
|
| 1149 |
+
prefix_allowed_tokens_fn: Optional[
|
| 1150 |
+
Callable[[int, torch.Tensor], List[int]]
|
| 1151 |
+
] = None,
|
| 1152 |
+
synced_gpus: Optional[bool] = None,
|
| 1153 |
+
assistant_model: Optional["PreTrainedModel"] = None,
|
| 1154 |
+
streamer: Optional["BaseStreamer"] = None,
|
| 1155 |
+
**kwargs,
|
| 1156 |
+
) -> Union[GenerateOutput, torch.LongTensor]:
|
| 1157 |
+
# Process stop_words_ids.
|
| 1158 |
+
stop_words_ids = kwargs.pop("stop_words_ids", None)
|
| 1159 |
+
if stop_words_ids is None and generation_config is not None:
|
| 1160 |
+
stop_words_ids = getattr(generation_config, "stop_words_ids", None)
|
| 1161 |
+
if stop_words_ids is None:
|
| 1162 |
+
stop_words_ids = getattr(self.generation_config, "stop_words_ids", None)
|
| 1163 |
+
|
| 1164 |
+
if stop_words_ids is not None:
|
| 1165 |
+
stop_words_logits_processor = StopWordsLogitsProcessor(
|
| 1166 |
+
stop_words_ids=stop_words_ids,
|
| 1167 |
+
eos_token_id=self.generation_config.eos_token_id,
|
| 1168 |
+
)
|
| 1169 |
+
if logits_processor is None:
|
| 1170 |
+
logits_processor = LogitsProcessorList([stop_words_logits_processor])
|
| 1171 |
+
else:
|
| 1172 |
+
logits_processor.append(stop_words_logits_processor)
|
| 1173 |
+
|
| 1174 |
+
return super().generate(
|
| 1175 |
+
inputs,
|
| 1176 |
+
generation_config=generation_config,
|
| 1177 |
+
logits_processor=logits_processor,
|
| 1178 |
+
stopping_criteria=stopping_criteria,
|
| 1179 |
+
prefix_allowed_tokens_fn=prefix_allowed_tokens_fn,
|
| 1180 |
+
synced_gpus=synced_gpus,
|
| 1181 |
+
assistant_model=assistant_model,
|
| 1182 |
+
streamer=streamer,
|
| 1183 |
+
**kwargs,
|
| 1184 |
+
)
|
| 1185 |
+
|
| 1186 |
+
|
| 1187 |
+
class RotaryEmbedding(torch.nn.Module):
|
| 1188 |
+
def __init__(self, dim, base=10000):
|
| 1189 |
+
super().__init__()
|
| 1190 |
+
self.dim = dim
|
| 1191 |
+
self.base = base
|
| 1192 |
+
self.inv_freq = 1.0 / (base ** (torch.arange(0, dim, 2).float() / dim))
|
| 1193 |
+
if importlib.util.find_spec("einops") is None:
|
| 1194 |
+
raise RuntimeError("einops is required for Rotary Embedding")
|
| 1195 |
+
|
| 1196 |
+
self._rotary_pos_emb_cache = None
|
| 1197 |
+
self._seq_len_cached = 0
|
| 1198 |
+
self._ntk_alpha_cached = 1.0
|
| 1199 |
+
|
| 1200 |
+
def update_rotary_pos_emb_cache(self, max_seq_len, offset=0, ntk_alpha=1.0):
|
| 1201 |
+
seqlen = max_seq_len + offset
|
| 1202 |
+
if seqlen > self._seq_len_cached or ntk_alpha != self._ntk_alpha_cached:
|
| 1203 |
+
base = self.base * ntk_alpha ** (self.dim / (self.dim - 2))
|
| 1204 |
+
self.inv_freq = 1.0 / (
|
| 1205 |
+
base
|
| 1206 |
+
** (
|
| 1207 |
+
torch.arange(0, self.dim, 2, device=self.inv_freq.device).float()
|
| 1208 |
+
/ self.dim
|
| 1209 |
+
)
|
| 1210 |
+
)
|
| 1211 |
+
self._seq_len_cached = max(2 * seqlen, 16)
|
| 1212 |
+
self._ntk_alpha_cached = ntk_alpha
|
| 1213 |
+
seq = torch.arange(self._seq_len_cached, device=self.inv_freq.device)
|
| 1214 |
+
freqs = torch.outer(seq.type_as(self.inv_freq), self.inv_freq)
|
| 1215 |
+
emb = torch.cat((freqs, freqs), dim=-1)
|
| 1216 |
+
from einops import rearrange
|
| 1217 |
+
|
| 1218 |
+
self._rotary_pos_emb_cache = rearrange(emb, "n d -> 1 n 1 d")
|
| 1219 |
+
|
| 1220 |
+
def forward(self, max_seq_len, offset=0, ntk_alpha=1.0):
|
| 1221 |
+
self.update_rotary_pos_emb_cache(max_seq_len, offset, ntk_alpha)
|
| 1222 |
+
return self._rotary_pos_emb_cache[:, offset : offset + max_seq_len]
|
| 1223 |
+
|
| 1224 |
+
|
| 1225 |
+
def _rotate_half(x):
|
| 1226 |
+
from einops import rearrange
|
| 1227 |
+
|
| 1228 |
+
x = rearrange(x, "... (j d) -> ... j d", j=2)
|
| 1229 |
+
x1, x2 = x.unbind(dim=-2)
|
| 1230 |
+
return torch.cat((-x2, x1), dim=-1)
|
| 1231 |
+
|
| 1232 |
+
|
| 1233 |
+
def apply_rotary_pos_emb(t, freqs):
|
| 1234 |
+
if apply_rotary_emb_func is not None and t.is_cuda:
|
| 1235 |
+
t_ = t.float()
|
| 1236 |
+
freqs = freqs.squeeze(0).squeeze(1)
|
| 1237 |
+
cos = freqs[:, : freqs.shape[-1] // 2].cos()
|
| 1238 |
+
sin = freqs[:, : freqs.shape[-1] // 2].sin()
|
| 1239 |
+
output = apply_rotary_emb_func(t_, cos, sin).type_as(t)
|
| 1240 |
+
return output
|
| 1241 |
+
else:
|
| 1242 |
+
rot_dim = freqs.shape[-1]
|
| 1243 |
+
t_, t_pass_ = t[..., :rot_dim], t[..., rot_dim:]
|
| 1244 |
+
t_ = t_.float()
|
| 1245 |
+
t_pass_ = t_pass_.float()
|
| 1246 |
+
t_ = (t_ * freqs.cos()) + (_rotate_half(t_) * freqs.sin())
|
| 1247 |
+
return torch.cat((t_, t_pass_), dim=-1).type_as(t)
|
| 1248 |
+
|
| 1249 |
+
|
| 1250 |
+
class RMSNorm(torch.nn.Module):
|
| 1251 |
+
def __init__(self, dim: int, eps: float = 1e-6):
|
| 1252 |
+
super().__init__()
|
| 1253 |
+
self.eps = eps
|
| 1254 |
+
self.weight = nn.Parameter(torch.ones(dim))
|
| 1255 |
+
|
| 1256 |
+
def _norm(self, x):
|
| 1257 |
+
return x * torch.rsqrt(x.pow(2).mean(-1, keepdim=True) + self.eps)
|
| 1258 |
+
|
| 1259 |
+
def forward(self, x):
|
| 1260 |
+
if rms_norm is not None and x.is_cuda:
|
| 1261 |
+
return rms_norm(x, self.weight, self.eps)
|
| 1262 |
+
else:
|
| 1263 |
+
output = self._norm(x.float()).type_as(x)
|
| 1264 |
+
return output * self.weight
|
pytorch_model-00001-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:8096d6aefba5b263f06ecd9f19b76e1780fefe2aa7010eab4f1235b18253e8f7
|
| 3 |
+
size 1964070447
|
pytorch_model-00002-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
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| 2 |
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|
| 3 |
+
size 1933792141
|
pytorch_model-00003-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
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| 2 |
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oid sha256:7fce23c694efdf7b28c152f9ac77ba40a5e114d066708fab8079db0ee967db93
|
| 3 |
+
size 1933792141
|
pytorch_model-00004-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:0fcc2950c12804b413838b291bbd302b375a2caf80aa5ec5dd5588e9083675bd
|
| 3 |
+
size 1990406779
|
pytorch_model-00005-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:8a83706861cd18b0b7a58a67022b92a13d94d6c740fa003a0c4a44bc18938988
|
| 3 |
+
size 1923281531
|
pytorch_model-00006-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:4af6fbf1423f86de3f88942ec2460641a22570d1c41347625043d9933e51c3ca
|
| 3 |
+
size 1933783675
|
pytorch_model-00007-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:5171efa571c59248f314a4ebfb56d5f4dede27f89a126d17ce5400eb6220d82f
|
| 3 |
+
size 1933792205
|
pytorch_model-00008-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:5f79876d7cc162272687daac6dd09778b4bce04895bc44f67c53cc4a9b803fc5
|
| 3 |
+
size 1975364669
|
pytorch_model-00009-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:02b652b95c6dffc2754d2cc3d8166b35c542726a571b979fc2b59417c218f196
|
| 3 |
+
size 1994925011
|
pytorch_model-00010-of-00010.bin
ADDED
|
@@ -0,0 +1,3 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
version https://git-lfs.github.com/spec/v1
|
| 2 |
+
oid sha256:23baadda455bbc1f5238bd7b1eb2386e1d17312c8cfaa3f9a3e5bdde44883aa4
|
| 3 |
+
size 1730968463
|
pytorch_model.bin.index.json
ADDED
|
@@ -0,0 +1,860 @@
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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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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|
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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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|
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|
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|
|
|
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|
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|
|
|
|
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| 858 |
+
"transformer.wte.weight": "pytorch_model-00001-of-00010.bin"
|
| 859 |
+
}
|
| 860 |
+
}
|
qwen_generation_utils.py
ADDED
|
@@ -0,0 +1,420 @@
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|
|
|
| 1 |
+
# Copyright (c) Alibaba Cloud.
|
| 2 |
+
#
|
| 3 |
+
# This source code is licensed under the license found in the
|
| 4 |
+
# LICENSE file in the root directory of this source tree.
|
| 5 |
+
|
| 6 |
+
"""Generation support."""
|
| 7 |
+
|
| 8 |
+
from typing import Tuple, List, Union, Iterable
|
| 9 |
+
|
| 10 |
+
import numpy as np
|
| 11 |
+
import torch
|
| 12 |
+
import torch.nn.functional as F
|
| 13 |
+
from transformers import PreTrainedTokenizer
|
| 14 |
+
from transformers import logging
|
| 15 |
+
from transformers.generation import LogitsProcessor
|
| 16 |
+
|
| 17 |
+
logger = logging.get_logger(__name__)
|
| 18 |
+
|
| 19 |
+
# Types.
|
| 20 |
+
HistoryType = List[Tuple[str, str]]
|
| 21 |
+
TokensType = List[int]
|
| 22 |
+
BatchTokensType = List[List[int]]
|
| 23 |
+
|
| 24 |
+
|
| 25 |
+
def pad_batch(batch: BatchTokensType, pad_id: int, seq_length: int) -> BatchTokensType:
|
| 26 |
+
for tokens in batch:
|
| 27 |
+
context_length = len(tokens)
|
| 28 |
+
if context_length < seq_length:
|
| 29 |
+
tokens.extend([pad_id] * (seq_length - context_length))
|
| 30 |
+
return batch
|
| 31 |
+
|
| 32 |
+
|
| 33 |
+
def get_ltor_masks_and_position_ids(
|
| 34 |
+
data,
|
| 35 |
+
eod_token,
|
| 36 |
+
reset_position_ids,
|
| 37 |
+
reset_attention_mask,
|
| 38 |
+
eod_mask_loss,
|
| 39 |
+
):
|
| 40 |
+
"""Build masks and position id for left to right model."""
|
| 41 |
+
|
| 42 |
+
# Extract batch size and sequence length.
|
| 43 |
+
micro_batch_size, seq_length = data.size()
|
| 44 |
+
|
| 45 |
+
# Attention mask (lower triangular).
|
| 46 |
+
if reset_attention_mask:
|
| 47 |
+
att_mask_batch = micro_batch_size
|
| 48 |
+
else:
|
| 49 |
+
att_mask_batch = 1
|
| 50 |
+
attention_mask = torch.tril(
|
| 51 |
+
torch.ones((att_mask_batch, seq_length, seq_length), device=data.device)
|
| 52 |
+
).view(att_mask_batch, 1, seq_length, seq_length)
|
| 53 |
+
|
| 54 |
+
# Loss mask.
|
| 55 |
+
loss_mask = torch.ones(data.size(), dtype=torch.float, device=data.device)
|
| 56 |
+
if eod_mask_loss:
|
| 57 |
+
loss_mask[data == eod_token] = 0.0
|
| 58 |
+
|
| 59 |
+
# Position ids.
|
| 60 |
+
position_ids = torch.arange(seq_length, dtype=torch.long, device=data.device)
|
| 61 |
+
position_ids = position_ids.unsqueeze(0).expand_as(data)
|
| 62 |
+
# We need to clone as the ids will be modifed based on batch index.
|
| 63 |
+
if reset_position_ids:
|
| 64 |
+
position_ids = position_ids.clone()
|
| 65 |
+
|
| 66 |
+
if reset_position_ids or reset_attention_mask:
|
| 67 |
+
# Loop through the batches:
|
| 68 |
+
for b in range(micro_batch_size):
|
| 69 |
+
|
| 70 |
+
# Find indecies where EOD token is.
|
| 71 |
+
eod_index = position_ids[b, data[b] == eod_token]
|
| 72 |
+
# Detach indecies from positions if going to modify positions.
|
| 73 |
+
if reset_position_ids:
|
| 74 |
+
eod_index = eod_index.clone()
|
| 75 |
+
|
| 76 |
+
# Loop through EOD indecies:
|
| 77 |
+
prev_index = 0
|
| 78 |
+
for j in range(eod_index.size()[0]):
|
| 79 |
+
i = eod_index[j]
|
| 80 |
+
# Mask attention loss.
|
| 81 |
+
if reset_attention_mask:
|
| 82 |
+
attention_mask[b, 0, (i + 1) :, : (i + 1)] = 0
|
| 83 |
+
# Reset positions.
|
| 84 |
+
if reset_position_ids:
|
| 85 |
+
position_ids[b, (i + 1) :] -= i + 1 - prev_index
|
| 86 |
+
prev_index = i + 1
|
| 87 |
+
|
| 88 |
+
# Convert attention mask to binary:
|
| 89 |
+
attention_mask = attention_mask < 0.5
|
| 90 |
+
|
| 91 |
+
return attention_mask, loss_mask, position_ids
|
| 92 |
+
|
| 93 |
+
|
| 94 |
+
def get_batch(context_tokens: torch.LongTensor, eod_id: int):
|
| 95 |
+
"""Generate batch from context tokens."""
|
| 96 |
+
# Move to GPU.
|
| 97 |
+
tokens = context_tokens.contiguous().to(context_tokens.device)
|
| 98 |
+
# Get the attention mask and postition ids.
|
| 99 |
+
attention_mask, _, position_ids = get_ltor_masks_and_position_ids(
|
| 100 |
+
tokens,
|
| 101 |
+
eod_id,
|
| 102 |
+
reset_position_ids=False,
|
| 103 |
+
reset_attention_mask=False,
|
| 104 |
+
eod_mask_loss=False,
|
| 105 |
+
)
|
| 106 |
+
return tokens, attention_mask, position_ids
|
| 107 |
+
|
| 108 |
+
|
| 109 |
+
def get_stop_words_ids(chat_format, tokenizer):
|
| 110 |
+
if chat_format == "raw":
|
| 111 |
+
stop_words_ids = [tokenizer.encode("Human:"), [tokenizer.eod_id]]
|
| 112 |
+
elif chat_format == "chatml":
|
| 113 |
+
stop_words_ids = [[tokenizer.im_end_id], [tokenizer.im_start_id]]
|
| 114 |
+
else:
|
| 115 |
+
raise NotImplementedError(f"Unknown chat format {chat_format!r}")
|
| 116 |
+
return stop_words_ids
|
| 117 |
+
|
| 118 |
+
|
| 119 |
+
def make_context(
|
| 120 |
+
tokenizer: PreTrainedTokenizer,
|
| 121 |
+
query: str,
|
| 122 |
+
history: List[Tuple[str, str]] = None,
|
| 123 |
+
system: str = "",
|
| 124 |
+
max_window_size: int = 6144,
|
| 125 |
+
chat_format: str = "chatml",
|
| 126 |
+
):
|
| 127 |
+
if history is None:
|
| 128 |
+
history = []
|
| 129 |
+
|
| 130 |
+
if chat_format == "chatml":
|
| 131 |
+
im_start, im_end = "<|im_start|>", "<|im_end|>"
|
| 132 |
+
im_start_tokens = [tokenizer.im_start_id]
|
| 133 |
+
im_end_tokens = [tokenizer.im_end_id]
|
| 134 |
+
nl_tokens = tokenizer.encode("\n")
|
| 135 |
+
|
| 136 |
+
def _tokenize_str(role, content):
|
| 137 |
+
return f"{role}\n{content}", tokenizer.encode(
|
| 138 |
+
role, allowed_special=set(tokenizer.IMAGE_ST)
|
| 139 |
+
) + nl_tokens + tokenizer.encode(content, allowed_special=set(tokenizer.IMAGE_ST))
|
| 140 |
+
|
| 141 |
+
system_text, system_tokens_part = _tokenize_str("system", system)
|
| 142 |
+
system_tokens = im_start_tokens + system_tokens_part + im_end_tokens
|
| 143 |
+
|
| 144 |
+
raw_text = ""
|
| 145 |
+
context_tokens = []
|
| 146 |
+
|
| 147 |
+
for turn_query, turn_response in reversed(history):
|
| 148 |
+
query_text, query_tokens_part = _tokenize_str("user", turn_query)
|
| 149 |
+
query_tokens = im_start_tokens + query_tokens_part + im_end_tokens
|
| 150 |
+
if turn_response is not None:
|
| 151 |
+
response_text, response_tokens_part = _tokenize_str(
|
| 152 |
+
"assistant", turn_response
|
| 153 |
+
)
|
| 154 |
+
response_tokens = im_start_tokens + response_tokens_part + im_end_tokens
|
| 155 |
+
|
| 156 |
+
next_context_tokens = nl_tokens + query_tokens + nl_tokens + response_tokens
|
| 157 |
+
prev_chat = (
|
| 158 |
+
f"\n{im_start}{query_text}{im_end}\n{im_start}{response_text}{im_end}"
|
| 159 |
+
)
|
| 160 |
+
else:
|
| 161 |
+
next_context_tokens = nl_tokens + query_tokens + nl_tokens
|
| 162 |
+
prev_chat = f"\n{im_start}{query_text}{im_end}\n"
|
| 163 |
+
|
| 164 |
+
current_context_size = (
|
| 165 |
+
len(system_tokens) + len(next_context_tokens) + len(context_tokens)
|
| 166 |
+
)
|
| 167 |
+
if current_context_size < max_window_size:
|
| 168 |
+
context_tokens = next_context_tokens + context_tokens
|
| 169 |
+
raw_text = prev_chat + raw_text
|
| 170 |
+
else:
|
| 171 |
+
break
|
| 172 |
+
|
| 173 |
+
context_tokens = system_tokens + context_tokens
|
| 174 |
+
raw_text = f"{im_start}{system_text}{im_end}" + raw_text
|
| 175 |
+
context_tokens += (
|
| 176 |
+
nl_tokens
|
| 177 |
+
+ im_start_tokens
|
| 178 |
+
+ _tokenize_str("user", query)[1]
|
| 179 |
+
+ im_end_tokens
|
| 180 |
+
+ nl_tokens
|
| 181 |
+
+ im_start_tokens
|
| 182 |
+
+ tokenizer.encode("assistant")
|
| 183 |
+
+ nl_tokens
|
| 184 |
+
)
|
| 185 |
+
raw_text += f"\n{im_start}user\n{query}{im_end}\n{im_start}assistant\n"
|
| 186 |
+
|
| 187 |
+
elif chat_format == "raw":
|
| 188 |
+
raw_text = query
|
| 189 |
+
context_tokens = tokenizer.encode(raw_text)
|
| 190 |
+
else:
|
| 191 |
+
raise NotImplementedError(f"Unknown chat format {chat_format!r}")
|
| 192 |
+
|
| 193 |
+
return raw_text, context_tokens
|
| 194 |
+
|
| 195 |
+
|
| 196 |
+
def _decode_default(
|
| 197 |
+
tokens: List[int],
|
| 198 |
+
*,
|
| 199 |
+
stop_words: List[str],
|
| 200 |
+
eod_words: List[str],
|
| 201 |
+
tokenizer: PreTrainedTokenizer,
|
| 202 |
+
raw_text_len: int,
|
| 203 |
+
verbose: bool = False,
|
| 204 |
+
return_end_reason: bool = False,
|
| 205 |
+
errors: str='replace',
|
| 206 |
+
):
|
| 207 |
+
trim_decode_tokens = tokenizer.decode(tokens, errors=errors)[raw_text_len:]
|
| 208 |
+
if verbose:
|
| 209 |
+
print("\nRaw Generate: ", trim_decode_tokens)
|
| 210 |
+
|
| 211 |
+
end_reason = f"Gen length {len(tokens)}"
|
| 212 |
+
for stop_word in stop_words:
|
| 213 |
+
trim_decode_tokens = trim_decode_tokens.replace(stop_word, "").strip()
|
| 214 |
+
for eod_word in eod_words:
|
| 215 |
+
if eod_word in trim_decode_tokens:
|
| 216 |
+
end_reason = f"Gen {eod_word!r}"
|
| 217 |
+
trim_decode_tokens = trim_decode_tokens.split(eod_word)[0]
|
| 218 |
+
trim_decode_tokens = trim_decode_tokens.strip()
|
| 219 |
+
if verbose:
|
| 220 |
+
print("\nEnd Reason:", end_reason)
|
| 221 |
+
print("\nGenerate: ", trim_decode_tokens)
|
| 222 |
+
|
| 223 |
+
if return_end_reason:
|
| 224 |
+
return trim_decode_tokens, end_reason
|
| 225 |
+
else:
|
| 226 |
+
return trim_decode_tokens
|
| 227 |
+
|
| 228 |
+
|
| 229 |
+
def _decode_chatml(
|
| 230 |
+
tokens: List[int],
|
| 231 |
+
*,
|
| 232 |
+
stop_words: List[str],
|
| 233 |
+
eod_token_ids: List[int],
|
| 234 |
+
tokenizer: PreTrainedTokenizer,
|
| 235 |
+
raw_text_len: int,
|
| 236 |
+
context_length: int,
|
| 237 |
+
verbose: bool = False,
|
| 238 |
+
return_end_reason: bool = False,
|
| 239 |
+
errors: str='replace'
|
| 240 |
+
):
|
| 241 |
+
end_reason = f"Gen length {len(tokens)}"
|
| 242 |
+
eod_token_idx = context_length
|
| 243 |
+
for eod_token_idx in range(context_length, len(tokens)):
|
| 244 |
+
if tokens[eod_token_idx] in eod_token_ids:
|
| 245 |
+
end_reason = f"Gen {tokenizer.decode([tokens[eod_token_idx]])!r}"
|
| 246 |
+
break
|
| 247 |
+
|
| 248 |
+
trim_decode_tokens = tokenizer.decode(tokens[:eod_token_idx], errors=errors)[raw_text_len:]
|
| 249 |
+
if verbose:
|
| 250 |
+
print("\nRaw Generate w/o EOD:", tokenizer.decode(tokens, errors=errors)[raw_text_len:])
|
| 251 |
+
print("\nRaw Generate:", trim_decode_tokens)
|
| 252 |
+
print("\nEnd Reason:", end_reason)
|
| 253 |
+
for stop_word in stop_words:
|
| 254 |
+
trim_decode_tokens = trim_decode_tokens.replace(stop_word, "").strip()
|
| 255 |
+
trim_decode_tokens = trim_decode_tokens.strip()
|
| 256 |
+
if verbose:
|
| 257 |
+
print("\nGenerate:", trim_decode_tokens)
|
| 258 |
+
|
| 259 |
+
if return_end_reason:
|
| 260 |
+
return trim_decode_tokens, end_reason
|
| 261 |
+
else:
|
| 262 |
+
return trim_decode_tokens
|
| 263 |
+
|
| 264 |
+
|
| 265 |
+
def decode_tokens(
|
| 266 |
+
tokens: Union[torch.LongTensor, TokensType],
|
| 267 |
+
tokenizer: PreTrainedTokenizer,
|
| 268 |
+
raw_text_len: int,
|
| 269 |
+
context_length: int,
|
| 270 |
+
chat_format: str,
|
| 271 |
+
verbose: bool = False,
|
| 272 |
+
return_end_reason: bool = False,
|
| 273 |
+
errors: str="replace",
|
| 274 |
+
) -> str:
|
| 275 |
+
if torch.is_tensor(tokens):
|
| 276 |
+
tokens = tokens.cpu().numpy().tolist()
|
| 277 |
+
|
| 278 |
+
if chat_format == "chatml":
|
| 279 |
+
return _decode_chatml(
|
| 280 |
+
tokens,
|
| 281 |
+
stop_words=[],
|
| 282 |
+
eod_token_ids=[tokenizer.im_start_id, tokenizer.im_end_id],
|
| 283 |
+
tokenizer=tokenizer,
|
| 284 |
+
raw_text_len=raw_text_len,
|
| 285 |
+
context_length=context_length,
|
| 286 |
+
verbose=verbose,
|
| 287 |
+
return_end_reason=return_end_reason,
|
| 288 |
+
errors=errors,
|
| 289 |
+
)
|
| 290 |
+
elif chat_format == "raw":
|
| 291 |
+
return _decode_default(
|
| 292 |
+
tokens,
|
| 293 |
+
stop_words=["<|endoftext|>"],
|
| 294 |
+
eod_words=["<|endoftext|>"],
|
| 295 |
+
tokenizer=tokenizer,
|
| 296 |
+
raw_text_len=raw_text_len,
|
| 297 |
+
verbose=verbose,
|
| 298 |
+
return_end_reason=return_end_reason,
|
| 299 |
+
errors=errors,
|
| 300 |
+
)
|
| 301 |
+
else:
|
| 302 |
+
raise NotImplementedError(f"Unknown chat format {chat_format!r}")
|
| 303 |
+
|
| 304 |
+
|
| 305 |
+
class StopWordsLogitsProcessor(LogitsProcessor):
|
| 306 |
+
"""
|
| 307 |
+
:class:`transformers.LogitsProcessor` that enforces that when specified sequences appear, stop geration.
|
| 308 |
+
|
| 309 |
+
Args:
|
| 310 |
+
stop_words_ids (:obj:`List[List[int]]`):
|
| 311 |
+
List of list of token ids of stop ids. In order to get the tokens of the words
|
| 312 |
+
that should not appear in the generated text, use :obj:`tokenizer(bad_word,
|
| 313 |
+
add_prefix_space=True).input_ids`.
|
| 314 |
+
eos_token_id (:obj:`int`):
|
| 315 |
+
The id of the `end-of-sequence` token.
|
| 316 |
+
"""
|
| 317 |
+
|
| 318 |
+
def __init__(self, stop_words_ids: Iterable[Iterable[int]], eos_token_id: int):
|
| 319 |
+
|
| 320 |
+
if not isinstance(stop_words_ids, List) or len(stop_words_ids) == 0:
|
| 321 |
+
raise ValueError(
|
| 322 |
+
f"`stop_words_ids` has to be a non-emtpy list, but is {stop_words_ids}."
|
| 323 |
+
)
|
| 324 |
+
if any(not isinstance(bad_word_ids, list) for bad_word_ids in stop_words_ids):
|
| 325 |
+
raise ValueError(
|
| 326 |
+
f"`stop_words_ids` has to be a list of lists, but is {stop_words_ids}."
|
| 327 |
+
)
|
| 328 |
+
if any(
|
| 329 |
+
any(
|
| 330 |
+
(not isinstance(token_id, (int, np.integer)) or token_id < 0)
|
| 331 |
+
for token_id in stop_word_ids
|
| 332 |
+
)
|
| 333 |
+
for stop_word_ids in stop_words_ids
|
| 334 |
+
):
|
| 335 |
+
raise ValueError(
|
| 336 |
+
f"Each list in `stop_words_ids` has to be a list of positive integers, but is {stop_words_ids}."
|
| 337 |
+
)
|
| 338 |
+
|
| 339 |
+
self.stop_words_ids = list(
|
| 340 |
+
filter(
|
| 341 |
+
lambda bad_token_seq: bad_token_seq != [eos_token_id], stop_words_ids
|
| 342 |
+
)
|
| 343 |
+
)
|
| 344 |
+
self.eos_token_id = eos_token_id
|
| 345 |
+
for stop_token_seq in self.stop_words_ids:
|
| 346 |
+
assert (
|
| 347 |
+
len(stop_token_seq) > 0
|
| 348 |
+
), "Stop words token sequences {} cannot have an empty list".format(
|
| 349 |
+
stop_words_ids
|
| 350 |
+
)
|
| 351 |
+
|
| 352 |
+
def __call__(
|
| 353 |
+
self, input_ids: torch.LongTensor, scores: torch.FloatTensor
|
| 354 |
+
) -> torch.FloatTensor:
|
| 355 |
+
stopped_samples = self._calc_stopped_samples(input_ids)
|
| 356 |
+
for i, should_stop in enumerate(stopped_samples):
|
| 357 |
+
if should_stop:
|
| 358 |
+
scores[i, self.eos_token_id] = float(2**15)
|
| 359 |
+
return scores
|
| 360 |
+
|
| 361 |
+
def _tokens_match(self, prev_tokens: torch.LongTensor, tokens: List[int]) -> bool:
|
| 362 |
+
if len(tokens) == 0:
|
| 363 |
+
# if bad word tokens is just one token always ban it
|
| 364 |
+
return True
|
| 365 |
+
elif len(tokens) > len(prev_tokens):
|
| 366 |
+
# if bad word tokens are longer then prev input_ids they can't be equal
|
| 367 |
+
return False
|
| 368 |
+
elif prev_tokens[-len(tokens) :].tolist() == tokens:
|
| 369 |
+
# if tokens match
|
| 370 |
+
return True
|
| 371 |
+
else:
|
| 372 |
+
return False
|
| 373 |
+
|
| 374 |
+
def _calc_stopped_samples(self, prev_input_ids: Iterable[int]) -> Iterable[int]:
|
| 375 |
+
stopped_samples = []
|
| 376 |
+
for prev_input_ids_slice in prev_input_ids:
|
| 377 |
+
match = False
|
| 378 |
+
for stop_token_seq in self.stop_words_ids:
|
| 379 |
+
if self._tokens_match(prev_input_ids_slice, stop_token_seq):
|
| 380 |
+
# if tokens do not match continue
|
| 381 |
+
match = True
|
| 382 |
+
break
|
| 383 |
+
stopped_samples.append(match)
|
| 384 |
+
|
| 385 |
+
return stopped_samples
|
| 386 |
+
|
| 387 |
+
|
| 388 |
+
def top_k_logits(logits, top_k=0, top_p=0.0, filter_value=-float("Inf")):
|
| 389 |
+
"""This function has been mostly taken from huggingface conversational
|
| 390 |
+
ai code at
|
| 391 |
+
https://medium.com/huggingface/how-to-build-a-state-of-the-art-
|
| 392 |
+
conversational-ai-with-transfer-learning-2d818ac26313"""
|
| 393 |
+
|
| 394 |
+
if top_k > 0:
|
| 395 |
+
# Remove all tokens with a probability less than the
|
| 396 |
+
# last token of the top-k
|
| 397 |
+
indices_to_remove = logits < torch.topk(logits, top_k)[0][..., -1, None]
|
| 398 |
+
logits[indices_to_remove] = filter_value
|
| 399 |
+
|
| 400 |
+
if top_p > 0.0:
|
| 401 |
+
# Cconvert to 1D
|
| 402 |
+
sorted_logits, sorted_indices = torch.sort(logits, descending=True, dim=-1)
|
| 403 |
+
cumulative_probs = torch.cumsum(F.softmax(sorted_logits, dim=-1), dim=-1)
|
| 404 |
+
|
| 405 |
+
# Remove tokens with cumulative probability above the threshold
|
| 406 |
+
sorted_indices_to_remove = cumulative_probs > top_p
|
| 407 |
+
# Shift the indices to the right to keep also the first token
|
| 408 |
+
# above the threshold
|
| 409 |
+
sorted_indices_to_remove[..., 1:] = sorted_indices_to_remove[..., :-1].clone()
|
| 410 |
+
sorted_indices_to_remove[..., 0] = 0
|
| 411 |
+
for i in range(sorted_indices.size(0)):
|
| 412 |
+
indices_to_remove = sorted_indices[i][sorted_indices_to_remove[i]]
|
| 413 |
+
logits[i][indices_to_remove] = filter_value
|
| 414 |
+
|
| 415 |
+
return logits
|
| 416 |
+
|
| 417 |
+
|
| 418 |
+
def switch(val1, val2, boolean):
|
| 419 |
+
boolean = boolean.type_as(val1)
|
| 420 |
+
return (1 - boolean) * val1 + boolean * val2
|
visual.py
ADDED
|
@@ -0,0 +1,375 @@
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|
| 1 |
+
from collections import OrderedDict
|
| 2 |
+
import math
|
| 3 |
+
import requests
|
| 4 |
+
from io import BytesIO
|
| 5 |
+
from functools import partial
|
| 6 |
+
from PIL import Image
|
| 7 |
+
from typing import Callable, Optional, Sequence, Tuple, List
|
| 8 |
+
|
| 9 |
+
import torch
|
| 10 |
+
from torch import nn
|
| 11 |
+
from torch.nn import functional as F
|
| 12 |
+
from torch.utils.checkpoint import checkpoint
|
| 13 |
+
from torch.nn.init import trunc_normal_
|
| 14 |
+
from torchvision import transforms
|
| 15 |
+
from torchvision.transforms import InterpolationMode
|
| 16 |
+
|
| 17 |
+
|
| 18 |
+
def get_abs_pos(abs_pos, tgt_size):
|
| 19 |
+
# abs_pos: L, C
|
| 20 |
+
# tgt_size: M
|
| 21 |
+
# return: M, C
|
| 22 |
+
src_size = int(math.sqrt(abs_pos.size(0)))
|
| 23 |
+
tgt_size = int(math.sqrt(tgt_size))
|
| 24 |
+
dtype = abs_pos.dtype
|
| 25 |
+
|
| 26 |
+
if src_size != tgt_size:
|
| 27 |
+
return F.interpolate(
|
| 28 |
+
abs_pos.float().reshape(1, src_size, src_size, -1).permute(0, 3, 1, 2),
|
| 29 |
+
size=(tgt_size, tgt_size),
|
| 30 |
+
mode="bicubic",
|
| 31 |
+
align_corners=False,
|
| 32 |
+
).permute(0, 2, 3, 1).flatten(0, 2).to(dtype=dtype)
|
| 33 |
+
else:
|
| 34 |
+
return abs_pos
|
| 35 |
+
|
| 36 |
+
|
| 37 |
+
class Resampler(nn.Module):
|
| 38 |
+
def __init__(
|
| 39 |
+
self,
|
| 40 |
+
grid_size,
|
| 41 |
+
embed_dim,
|
| 42 |
+
num_heads,
|
| 43 |
+
kv_dim=None,
|
| 44 |
+
norm_layer=nn.LayerNorm
|
| 45 |
+
):
|
| 46 |
+
super().__init__()
|
| 47 |
+
self.num_queries = grid_size ** 2
|
| 48 |
+
self.embed_dim = embed_dim
|
| 49 |
+
self.num_heads = num_heads
|
| 50 |
+
|
| 51 |
+
self.pos_embed = nn.Parameter(torch.randn(embed_dim, grid_size)).requires_grad_(False)
|
| 52 |
+
|
| 53 |
+
self.query = nn.Parameter(torch.zeros(self.num_queries, embed_dim))
|
| 54 |
+
trunc_normal_(self.query, std=.02)
|
| 55 |
+
|
| 56 |
+
if kv_dim is not None and kv_dim != embed_dim:
|
| 57 |
+
self.kv_proj = nn.Linear(kv_dim, embed_dim, bias=False)
|
| 58 |
+
else:
|
| 59 |
+
self.kv_proj = nn.Identity()
|
| 60 |
+
|
| 61 |
+
self.attn = nn.MultiheadAttention(embed_dim, num_heads)
|
| 62 |
+
self.ln_q = norm_layer(embed_dim)
|
| 63 |
+
self.ln_kv = norm_layer(embed_dim)
|
| 64 |
+
|
| 65 |
+
self.apply(self._init_weights)
|
| 66 |
+
|
| 67 |
+
def _init_weights(self, m):
|
| 68 |
+
if isinstance(m, nn.Linear):
|
| 69 |
+
trunc_normal_(m.weight, std=.02)
|
| 70 |
+
if isinstance(m, nn.Linear) and m.bias is not None:
|
| 71 |
+
nn.init.constant_(m.bias, 0)
|
| 72 |
+
elif isinstance(m, nn.LayerNorm):
|
| 73 |
+
nn.init.constant_(m.bias, 0)
|
| 74 |
+
nn.init.constant_(m.weight, 1.0)
|
| 75 |
+
|
| 76 |
+
def forward(self, x, attn_mask=None):
|
| 77 |
+
|
| 78 |
+
pos_embed = get_abs_pos(self.pos_embed, x.size(1))
|
| 79 |
+
|
| 80 |
+
x = self.kv_proj(x)
|
| 81 |
+
x = self.ln_kv(x).permute(1, 0, 2)
|
| 82 |
+
|
| 83 |
+
N = x.shape[1]
|
| 84 |
+
q = self.ln_q(self.query)
|
| 85 |
+
out = self.attn(
|
| 86 |
+
self._repeat(q, N) + self.pos_embed.unsqueeze(1),
|
| 87 |
+
x + pos_embed.unsqueeze(1),
|
| 88 |
+
x,
|
| 89 |
+
attn_mask=attn_mask)[0]
|
| 90 |
+
return out.permute(1, 0, 2)
|
| 91 |
+
|
| 92 |
+
def _repeat(self, query, N: int):
|
| 93 |
+
return query.unsqueeze(1).repeat(1, N, 1)
|
| 94 |
+
|
| 95 |
+
|
| 96 |
+
class VisualAttention(nn.Module):
|
| 97 |
+
"""self-attention layer class.
|
| 98 |
+
|
| 99 |
+
Self-attention layer takes input with size [s, b, h]
|
| 100 |
+
and returns output of the same size.
|
| 101 |
+
"""
|
| 102 |
+
|
| 103 |
+
def __init__(self, embed_dim, num_heads,
|
| 104 |
+
bias=True, kdim=None, vdim=None):
|
| 105 |
+
super(VisualAttention, self).__init__()
|
| 106 |
+
self.embed_dim = embed_dim
|
| 107 |
+
self.kdim = kdim if kdim is not None else embed_dim
|
| 108 |
+
self.vdim = vdim if vdim is not None else embed_dim
|
| 109 |
+
self._qkv_same_embed_dim = self.kdim == embed_dim and self.vdim == embed_dim
|
| 110 |
+
|
| 111 |
+
self.num_heads = num_heads
|
| 112 |
+
|
| 113 |
+
# Per attention head and per partition values.
|
| 114 |
+
assert embed_dim % num_heads == 0
|
| 115 |
+
self.hidden_size_per_attention_head = embed_dim // num_heads
|
| 116 |
+
self.num_attention_heads_per_partition = num_heads
|
| 117 |
+
self.hidden_size_per_partition = embed_dim
|
| 118 |
+
|
| 119 |
+
# Strided linear layer.
|
| 120 |
+
assert self._qkv_same_embed_dim, 'Only Support SelfAttention Currently'
|
| 121 |
+
self.in_proj = nn.Linear(embed_dim, 3 * embed_dim)
|
| 122 |
+
self.out_proj = nn.Linear(embed_dim, embed_dim)
|
| 123 |
+
self.norm_factor = math.sqrt(self.hidden_size_per_attention_head)
|
| 124 |
+
|
| 125 |
+
def forward(self, query, key, value, attn_mask = None):
|
| 126 |
+
# query/key/value: [sq, b, h]
|
| 127 |
+
sq, b, _ = query.size()
|
| 128 |
+
|
| 129 |
+
assert query is key, 'Only Support Self-Attention Currently'
|
| 130 |
+
sk = sq
|
| 131 |
+
mixed_x_layer = self.in_proj(query)
|
| 132 |
+
|
| 133 |
+
# [sq, b, (np * 3 * hn)] --> [sq, b, np, 3 * hn]
|
| 134 |
+
new_tensor_shape = mixed_x_layer.size()[:-1] + \
|
| 135 |
+
(self.num_attention_heads_per_partition,
|
| 136 |
+
3 * self.hidden_size_per_attention_head)
|
| 137 |
+
mixed_x_layer = mixed_x_layer.view(*new_tensor_shape)
|
| 138 |
+
|
| 139 |
+
# [sq, b, np, 3 * hn] --> 3 [sq, b, np, hn]
|
| 140 |
+
query_layer, key_layer, value_layer = mixed_x_layer.split(
|
| 141 |
+
self.hidden_size_per_attention_head, dim=-1)
|
| 142 |
+
|
| 143 |
+
# [sq, b, np, hn] -> [sq, b * np, hn]
|
| 144 |
+
query_layer = query_layer.view(sq,
|
| 145 |
+
b * self.num_attention_heads_per_partition,
|
| 146 |
+
self.hidden_size_per_attention_head).transpose(0, 1)
|
| 147 |
+
# [sk, b, np, hn] -> [sk, b * np, hn]
|
| 148 |
+
key_layer = key_layer.view(sk,
|
| 149 |
+
b * self.num_attention_heads_per_partition,
|
| 150 |
+
self.hidden_size_per_attention_head).transpose(0, 1)
|
| 151 |
+
|
| 152 |
+
q_scaled = query_layer / self.norm_factor
|
| 153 |
+
if attn_mask is not None:
|
| 154 |
+
attention_probs = torch.baddbmm(attn_mask, q_scaled, key_layer.transpose(-2, -1))
|
| 155 |
+
else:
|
| 156 |
+
attention_probs = torch.bmm(q_scaled, key_layer.transpose(-2, -1))
|
| 157 |
+
attention_probs = attention_probs.softmax(dim=-1)
|
| 158 |
+
|
| 159 |
+
value_layer = value_layer.view(sk,
|
| 160 |
+
b * self.num_attention_heads_per_partition,
|
| 161 |
+
self.hidden_size_per_attention_head).transpose(0, 1)
|
| 162 |
+
|
| 163 |
+
# matmul: [b * np, sq, hn]
|
| 164 |
+
context_layer = torch.bmm(attention_probs, value_layer)
|
| 165 |
+
|
| 166 |
+
# change view [b, np, sq, hn]
|
| 167 |
+
context_layer = context_layer.view(b,
|
| 168 |
+
self.num_attention_heads_per_partition,
|
| 169 |
+
sq, self.hidden_size_per_attention_head)
|
| 170 |
+
|
| 171 |
+
# [b, np, sq, hn] --> [sq, b, np, hn]
|
| 172 |
+
context_layer = context_layer.permute(2, 0, 1, 3).contiguous()
|
| 173 |
+
|
| 174 |
+
# [sq, b, np, hn] --> [sq, b, hp]
|
| 175 |
+
new_context_layer_shape = context_layer.size()[:-2] + \
|
| 176 |
+
(self.hidden_size_per_partition,)
|
| 177 |
+
context_layer = context_layer.view(*new_context_layer_shape)
|
| 178 |
+
|
| 179 |
+
output = self.out_proj(context_layer)
|
| 180 |
+
|
| 181 |
+
return output
|
| 182 |
+
|
| 183 |
+
|
| 184 |
+
class VisualAttentionBlock(nn.Module):
|
| 185 |
+
def __init__(
|
| 186 |
+
self,
|
| 187 |
+
d_model: int,
|
| 188 |
+
n_head: int,
|
| 189 |
+
mlp_ratio: float = 4.0,
|
| 190 |
+
act_layer: Callable = nn.GELU,
|
| 191 |
+
norm_layer: Callable = nn.LayerNorm,
|
| 192 |
+
is_cross_attention: bool = False,
|
| 193 |
+
):
|
| 194 |
+
super().__init__()
|
| 195 |
+
|
| 196 |
+
self.ln_1 = norm_layer(d_model)
|
| 197 |
+
if is_cross_attention:
|
| 198 |
+
self.ln_1_kv = norm_layer(d_model)
|
| 199 |
+
|
| 200 |
+
self.ln_2 = norm_layer(d_model)
|
| 201 |
+
mlp_width = int(d_model * mlp_ratio)
|
| 202 |
+
self.attn = VisualAttention(d_model, n_head)
|
| 203 |
+
self.mlp = nn.Sequential(OrderedDict([
|
| 204 |
+
("c_fc", nn.Linear(d_model, mlp_width)),
|
| 205 |
+
("gelu", act_layer()),
|
| 206 |
+
("c_proj", nn.Linear(mlp_width, d_model))
|
| 207 |
+
]))
|
| 208 |
+
|
| 209 |
+
def attention(
|
| 210 |
+
self,
|
| 211 |
+
q_x: torch.Tensor,
|
| 212 |
+
k_x: Optional[torch.Tensor] = None,
|
| 213 |
+
v_x: Optional[torch.Tensor] = None,
|
| 214 |
+
attn_mask: Optional[torch.Tensor] = None,
|
| 215 |
+
):
|
| 216 |
+
k_x = k_x if k_x is not None else q_x
|
| 217 |
+
v_x = v_x if v_x is not None else q_x
|
| 218 |
+
|
| 219 |
+
attn_mask = attn_mask.to(q_x.dtype) if attn_mask is not None else None
|
| 220 |
+
return self.attn(q_x, k_x, v_x, attn_mask=attn_mask)
|
| 221 |
+
|
| 222 |
+
def forward(
|
| 223 |
+
self,
|
| 224 |
+
q_x: torch.Tensor,
|
| 225 |
+
k_x: Optional[torch.Tensor] = None,
|
| 226 |
+
v_x: Optional[torch.Tensor] = None,
|
| 227 |
+
attn_mask: Optional[torch.Tensor] = None,
|
| 228 |
+
):
|
| 229 |
+
k_x = self.ln_1_kv(k_x) if hasattr(self, "ln_1_kv") and k_x is not None else None
|
| 230 |
+
v_x = self.ln_1_kv(v_x) if hasattr(self, "ln_1_kv") and v_x is not None else None
|
| 231 |
+
|
| 232 |
+
x = q_x + self.attention(q_x=self.ln_1(q_x), k_x=k_x, v_x=v_x, attn_mask=attn_mask)
|
| 233 |
+
x = x + self.mlp(self.ln_2(x))
|
| 234 |
+
return x
|
| 235 |
+
|
| 236 |
+
|
| 237 |
+
class Transformer(nn.Module):
|
| 238 |
+
def __init__(
|
| 239 |
+
self,
|
| 240 |
+
width: int,
|
| 241 |
+
layers: int,
|
| 242 |
+
heads: int,
|
| 243 |
+
mlp_ratio: float = 4.0,
|
| 244 |
+
act_layer: Callable = nn.GELU,
|
| 245 |
+
norm_layer: Callable = nn.LayerNorm,
|
| 246 |
+
):
|
| 247 |
+
super().__init__()
|
| 248 |
+
self.width = width
|
| 249 |
+
self.layers = layers
|
| 250 |
+
self.grad_checkpointing = False
|
| 251 |
+
|
| 252 |
+
self.resblocks = nn.ModuleList([
|
| 253 |
+
VisualAttentionBlock(
|
| 254 |
+
width, heads, mlp_ratio, act_layer=act_layer, norm_layer=norm_layer)
|
| 255 |
+
for _ in range(layers)
|
| 256 |
+
])
|
| 257 |
+
|
| 258 |
+
def get_cast_dtype(self) -> torch.dtype:
|
| 259 |
+
return self.resblocks[0].mlp.c_fc.weight.dtype
|
| 260 |
+
|
| 261 |
+
def get_cast_device(self) -> torch.device:
|
| 262 |
+
return self.resblocks[0].mlp.c_fc.weight.device
|
| 263 |
+
|
| 264 |
+
def forward(self, x: torch.Tensor, attn_mask: Optional[torch.Tensor] = None):
|
| 265 |
+
for r in self.resblocks:
|
| 266 |
+
if self.grad_checkpointing and not torch.jit.is_scripting():
|
| 267 |
+
# TODO: handle kwargs https://github.com/pytorch/pytorch/issues/79887#issuecomment-1161758372
|
| 268 |
+
x = checkpoint(r, x, None, None, attn_mask)
|
| 269 |
+
else:
|
| 270 |
+
x = r(x, attn_mask=attn_mask)
|
| 271 |
+
return x
|
| 272 |
+
|
| 273 |
+
|
| 274 |
+
class VisionTransformer(nn.Module):
|
| 275 |
+
|
| 276 |
+
def __init__(
|
| 277 |
+
self,
|
| 278 |
+
image_size: int,
|
| 279 |
+
patch_size: int,
|
| 280 |
+
width: int,
|
| 281 |
+
layers: int,
|
| 282 |
+
heads: int,
|
| 283 |
+
mlp_ratio: float,
|
| 284 |
+
n_queries: int = 256,
|
| 285 |
+
output_dim: int = 512,
|
| 286 |
+
**kwargs
|
| 287 |
+
):
|
| 288 |
+
super().__init__()
|
| 289 |
+
image_height, image_width = self.image_size = (image_size, image_size)
|
| 290 |
+
patch_height, patch_width = self.patch_size = (patch_size, patch_size)
|
| 291 |
+
self.grid_size = (image_height // patch_height, image_width // patch_width)
|
| 292 |
+
self.output_dim = output_dim
|
| 293 |
+
|
| 294 |
+
mean = (0.48145466, 0.4578275, 0.40821073)
|
| 295 |
+
std = (0.26862954, 0.26130258, 0.27577711)
|
| 296 |
+
self.image_transform = transforms.Compose([
|
| 297 |
+
transforms.Resize(
|
| 298 |
+
(image_size, image_size),
|
| 299 |
+
interpolation=InterpolationMode.BICUBIC
|
| 300 |
+
),
|
| 301 |
+
transforms.ToTensor(),
|
| 302 |
+
transforms.Normalize(mean=mean, std=std),
|
| 303 |
+
])
|
| 304 |
+
|
| 305 |
+
self.conv1 = nn.Conv2d(in_channels=3, out_channels=width, kernel_size=patch_size, stride=patch_size, bias=False)
|
| 306 |
+
|
| 307 |
+
# class embeddings and positional embeddings
|
| 308 |
+
scale = width ** -0.5
|
| 309 |
+
self.positional_embedding = nn.Parameter(scale * torch.randn(self.grid_size[0] * self.grid_size[1], width))
|
| 310 |
+
|
| 311 |
+
norm_layer = partial(nn.LayerNorm, eps=1e-6)
|
| 312 |
+
act_layer = nn.GELU
|
| 313 |
+
|
| 314 |
+
self.ln_pre = norm_layer(width)
|
| 315 |
+
self.transformer = Transformer(
|
| 316 |
+
width,
|
| 317 |
+
layers,
|
| 318 |
+
heads,
|
| 319 |
+
mlp_ratio,
|
| 320 |
+
act_layer=act_layer,
|
| 321 |
+
norm_layer=norm_layer,
|
| 322 |
+
)
|
| 323 |
+
|
| 324 |
+
self.attn_pool = Resampler(
|
| 325 |
+
grid_size=int(math.sqrt(n_queries)),
|
| 326 |
+
embed_dim=output_dim,
|
| 327 |
+
num_heads=output_dim // 128,
|
| 328 |
+
kv_dim=width,
|
| 329 |
+
norm_layer=norm_layer,
|
| 330 |
+
)
|
| 331 |
+
self.ln_post = norm_layer(output_dim)
|
| 332 |
+
self.proj = nn.Parameter((output_dim** -0.5) * torch.randn(output_dim, output_dim))
|
| 333 |
+
|
| 334 |
+
@torch.jit.ignore
|
| 335 |
+
def set_grad_checkpointing(self, enable=True):
|
| 336 |
+
self.transformer.grad_checkpointing = enable
|
| 337 |
+
|
| 338 |
+
def forward(self, x: torch.Tensor):
|
| 339 |
+
x = x.to(
|
| 340 |
+
dtype=self.transformer.get_cast_dtype(),
|
| 341 |
+
device=self.transformer.get_cast_device(),
|
| 342 |
+
)
|
| 343 |
+
# to patches
|
| 344 |
+
x = self.conv1(x) # shape = [*, width, grid, grid]
|
| 345 |
+
x = x.reshape(x.shape[0], x.shape[1], -1) # shape = [*, width, grid ** 2]
|
| 346 |
+
x = x.permute(0, 2, 1) # shape = [*, grid ** 2, width]
|
| 347 |
+
|
| 348 |
+
x = x + get_abs_pos(self.positional_embedding, x.size(1))
|
| 349 |
+
|
| 350 |
+
x = self.ln_pre(x)
|
| 351 |
+
|
| 352 |
+
x = x.permute(1, 0, 2) # NLD -> LND
|
| 353 |
+
x = self.transformer(x)
|
| 354 |
+
x = x.permute(1, 0, 2) # LND -> NLD
|
| 355 |
+
|
| 356 |
+
if self.attn_pool:
|
| 357 |
+
x = self.attn_pool(x)
|
| 358 |
+
x = self.ln_post(x)
|
| 359 |
+
x = x @ self.proj
|
| 360 |
+
|
| 361 |
+
return x
|
| 362 |
+
|
| 363 |
+
def encode(self, image_paths: List[str]):
|
| 364 |
+
images = []
|
| 365 |
+
for image_path in image_paths:
|
| 366 |
+
if image_path.startswith("http://") or image_path.startswith("https://"):
|
| 367 |
+
image = Image.open(requests.get(image_path, stream=True).raw)
|
| 368 |
+
elif image_path.startswith("oss://"):
|
| 369 |
+
raise NotImplementedError
|
| 370 |
+
else:
|
| 371 |
+
image = Image.open(image_path)
|
| 372 |
+
image = image.convert("RGB")
|
| 373 |
+
images.append(self.image_transform(image))
|
| 374 |
+
images = torch.stack(images, dim=0)
|
| 375 |
+
return self(images)
|