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LICENSE.txt ADDED
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+ LLAMA 2 COMMUNITY LICENSE AGREEMENT
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+ Llama 2 Version Release Date: July 18, 2023
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Notice ADDED
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+ Llama 2 is licensed under the LLAMA 2 Community License, Copyright © Meta Platforms, Inc. All Rights Reserved.
USE_POLICY.md ADDED
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+ # Llama 2 Acceptable Use Policy
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+
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+ Meta is committed to promoting safe and fair use of its tools and features, including Llama 2. If you access or use Llama 2, you agree to this Acceptable Use Policy (“Policy”). The most recent copy of this policy can be found at [ai.meta.com/llama/use-policy](http://ai.meta.com/llama/use-policy).
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+
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+ ## Prohibited Uses
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+ We want everyone to use Llama 2 safely and responsibly. You agree you will not use, or allow others to use, Llama 2 to:
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+ Please report any violation of this Policy, software “bug,” or other problems that could lead to a violation of this Policy through one of the following means:
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+
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+ * Reporting issues with the model: [github.com/facebookresearch/llama](http://github.com/facebookresearch/llama)
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+ * Reporting risky content generated by the model: [developers.facebook.com/llama_output_feedback](http://developers.facebook.com/llama_output_feedback)
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+ * Reporting bugs and security concerns: [facebook.com/whitehat/info](http://facebook.com/whitehat/info)
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+ * Reporting violations of the Acceptable Use Policy or unlicensed uses of Llama: [LlamaUseReport@meta.com](mailto:LlamaUseReport@meta.com)
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+
added_tokens.json ADDED
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+ {
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+ "<pad>": 32000
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+ }
config.json ADDED
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+ {
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+ "_name_or_path": "NousResearch/Llama-2-7b-hf",
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+ "architectures": [
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+ "LlamaForCausalLM"
5
+ ],
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+ "auto_map": {
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+ "AutoConfig": "configuration_llama.LlamaConfig",
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+ "AutoModel": "modeling_llama.LlamaModel",
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+ "AutoModelForCausalLM": "modeling_llama.LlamaForCausalLM",
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+ "AutoModelForSequenceClassification": "modeling_llama.LlamaForSequenceClassification"
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+ },
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+ "bos_token_id": 1,
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+ "eos_token_id": 2,
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+ "hidden_act": "silu",
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+ "hidden_size": 4096,
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+ "initializer_range": 0.02,
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+ "intermediate_size": 11008,
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+ "max_position_embeddings": 8192,
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+ "model_type": "llama",
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+ "num_attention_heads": 32,
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+ "num_hidden_layers": 32,
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+ "num_key_value_heads": 32,
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+ "pad_token_id": 0,
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+ "pretraining_tp": 1,
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+ "rms_norm_eps": 1e-05,
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+ "rope_scaling": {
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+ "type": "linear",
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+ "factor": 2.0
29
+ },
30
+ "tie_word_embeddings": false,
31
+ "torch_dtype": "bfloat16",
32
+ "transformers_version": "4.32.0.dev0",
33
+ "use_cache": true,
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+ "vocab_size": 32000
35
+ }
configuration_llama.py ADDED
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1
+ # coding=utf-8
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+ # Copyright 2022 EleutherAI and the HuggingFace Inc. team. All rights reserved.
3
+ #
4
+ # This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
5
+ # and OPT implementations in this library. It has been modified from its
6
+ # original forms to accommodate minor architectural differences compared
7
+ # to GPT-NeoX and OPT used by the Meta AI team that trained the model.
8
+ #
9
+ # Licensed under the Apache License, Version 2.0 (the "License");
10
+ # you may not use this file except in compliance with the License.
11
+ # You may obtain a copy of the License at
12
+ #
13
+ # http://www.apache.org/licenses/LICENSE-2.0
14
+ #
15
+ # Unless required by applicable law or agreed to in writing, software
16
+ # distributed under the License is distributed on an "AS IS" BASIS,
17
+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18
+ # See the License for the specific language governing permissions and
19
+ # limitations under the License.
20
+ """ LLaMA model configuration"""
21
+
22
+ from transformers.configuration_utils import PretrainedConfig
23
+ from transformers.utils import logging
24
+
25
+
26
+ logger = logging.get_logger(__name__)
27
+
28
+ LLAMA_PRETRAINED_CONFIG_ARCHIVE_MAP = {}
29
+
30
+
31
+ class LlamaConfig(PretrainedConfig):
32
+ r"""
33
+ This is the configuration class to store the configuration of a [`LlamaModel`]. It is used to instantiate an LLaMA
34
+ model according to the specified arguments, defining the model architecture. Instantiating a configuration with the
35
+ defaults will yield a similar configuration to that of the LLaMA-7B.
36
+
37
+ Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
38
+ documentation from [`PretrainedConfig`] for more information.
39
+
40
+
41
+ Args:
42
+ vocab_size (`int`, *optional*, defaults to 32000):
43
+ Vocabulary size of the LLaMA model. Defines the number of different tokens that can be represented by the
44
+ `inputs_ids` passed when calling [`LlamaModel`]
45
+ hidden_size (`int`, *optional*, defaults to 4096):
46
+ Dimension of the hidden representations.
47
+ intermediate_size (`int`, *optional*, defaults to 11008):
48
+ Dimension of the MLP representations.
49
+ num_hidden_layers (`int`, *optional*, defaults to 32):
50
+ Number of hidden layers in the Transformer encoder.
51
+ num_attention_heads (`int`, *optional*, defaults to 32):
52
+ Number of attention heads for each attention layer in the Transformer encoder.
53
+ num_key_value_heads (`int`, *optional*):
54
+ This is the number of key_value heads that should be used to implement Grouped Query Attention. If
55
+ `num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if
56
+ `num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When
57
+ converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed
58
+ by meanpooling all the original heads within that group. For more details checkout [this
59
+ paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to
60
+ `num_attention_heads`.
61
+ pretraining_tp (`int`, *optional*, defaults to `1`):
62
+ Experimental feature. Tensor parallelism rank used during pretraining. Please refer to [this
63
+ document](https://huggingface.co/docs/transformers/parallelism) to understand more about it. This value is
64
+ necessary to ensure exact reproducibility of the pretraining results. Please refer to [this
65
+ issue](https://github.com/pytorch/pytorch/issues/76232).
66
+ hidden_act (`str` or `function`, *optional*, defaults to `"silu"`):
67
+ The non-linear activation function (function or string) in the decoder.
68
+ max_position_embeddings (`int`, *optional*, defaults to 2048):
69
+ The maximum sequence length that this model might ever be used with. Typically set this to something large
70
+ just in case (e.g., 512 or 1024 or 2048).
71
+ initializer_range (`float`, *optional*, defaults to 0.02):
72
+ The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
73
+ rms_norm_eps (`float`, *optional*, defaults to 1e-12):
74
+ The epsilon used by the rms normalization layers.
75
+ use_cache (`bool`, *optional*, defaults to `True`):
76
+ Whether or not the model should return the last key/values attentions (not used by all models). Only
77
+ relevant if `config.is_decoder=True`.
78
+ tie_word_embeddings(`bool`, *optional*, defaults to `False`):
79
+ Whether to tie weight embeddings
80
+ rope_scaling (`Dict`, *optional*):
81
+ Dictionary containing the scaling configuration for the RoPE embeddings. Currently supports three scaling
82
+ strategies: linear and dynamic. Their scaling factor must be an float greater than 1. The expected format
83
+ is `{"type": strategy name, "factor": scaling factor}`. When using this flag, don't update
84
+ `max_position_embeddings` to the expected new maximum. See the following thread for more information on how
85
+ these scaling strategies behave:
86
+ https://www.reddit.com/r/LocalLLaMA/comments/14mrgpr/dynamically_scaled_rope_further_increases/. This is an
87
+ experimental feature, subject to breaking API changes in future versions.
88
+
89
+ Example:
90
+
91
+ ```python
92
+ >>> from transformers import LlamaModel, LlamaConfig
93
+
94
+ >>> # Initializing a LLaMA llama-7b style configuration
95
+ >>> configuration = LlamaConfig()
96
+
97
+ >>> # Initializing a model from the llama-7b style configuration
98
+ >>> model = LlamaModel(configuration)
99
+
100
+ >>> # Accessing the model configuration
101
+ >>> configuration = model.config
102
+ ```"""
103
+ model_type = "llama"
104
+ keys_to_ignore_at_inference = ["past_key_values"]
105
+
106
+ def __init__(
107
+ self,
108
+ vocab_size=32000,
109
+ hidden_size=4096,
110
+ intermediate_size=11008,
111
+ num_hidden_layers=32,
112
+ num_attention_heads=32,
113
+ num_key_value_heads=None,
114
+ hidden_act="silu",
115
+ max_position_embeddings=2048,
116
+ initializer_range=0.02,
117
+ rms_norm_eps=1e-6,
118
+ use_cache=True,
119
+ pad_token_id=0,
120
+ bos_token_id=1,
121
+ eos_token_id=2,
122
+ pretraining_tp=1,
123
+ tie_word_embeddings=False,
124
+ rope_scaling=None,
125
+ **kwargs,
126
+ ):
127
+ self.vocab_size = vocab_size
128
+ self.max_position_embeddings = max_position_embeddings
129
+ self.hidden_size = hidden_size
130
+ self.intermediate_size = intermediate_size
131
+ self.num_hidden_layers = num_hidden_layers
132
+ self.num_attention_heads = num_attention_heads
133
+
134
+ # for backward compatibility
135
+ if num_key_value_heads is None:
136
+ num_key_value_heads = num_attention_heads
137
+
138
+ self.num_key_value_heads = num_key_value_heads
139
+ self.hidden_act = hidden_act
140
+ self.initializer_range = initializer_range
141
+ self.rms_norm_eps = rms_norm_eps
142
+ self.pretraining_tp = pretraining_tp
143
+ self.use_cache = use_cache
144
+ self.rope_scaling = rope_scaling
145
+ self._rope_scaling_validation()
146
+
147
+ super().__init__(
148
+ pad_token_id=pad_token_id,
149
+ bos_token_id=bos_token_id,
150
+ eos_token_id=eos_token_id,
151
+ tie_word_embeddings=tie_word_embeddings,
152
+ **kwargs,
153
+ )
154
+
155
+ def _rope_scaling_validation(self):
156
+ """
157
+ Validate the `rope_scaling` configuration.
158
+ """
159
+ if self.rope_scaling is None:
160
+ return
161
+
162
+ if not isinstance(self.rope_scaling, dict) or len(self.rope_scaling) != 2:
163
+ raise ValueError(
164
+ "`rope_scaling` must be a dictionary with with two fields, `name` and `factor`, "
165
+ f"got {self.rope_scaling}"
166
+ )
167
+ rope_scaling_type = self.rope_scaling.get("type", None)
168
+ rope_scaling_factor = self.rope_scaling.get("factor", None)
169
+ if rope_scaling_type is None or rope_scaling_type not in ["linear", "dynamic"]:
170
+ raise ValueError(
171
+ f"`rope_scaling`'s name field must be one of ['linear', 'dynamic'], got {rope_scaling_type}"
172
+ )
173
+ if rope_scaling_factor is None or not isinstance(rope_scaling_factor, float) or rope_scaling_factor <= 1.0:
174
+ raise ValueError(f"`rope_scaling`'s factor field must be an float > 1, got {rope_scaling_factor}")
generation_config.json ADDED
@@ -0,0 +1,9 @@
 
 
 
 
 
 
 
 
 
 
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+ {
2
+ "_from_model_config": true,
3
+ "bos_token_id": 1,
4
+ "eos_token_id": 2,
5
+ "pad_token_id": 32000,
6
+ "temperature": 0.9,
7
+ "top_p": 0.6,
8
+ "transformers_version": "4.32.0.dev0"
9
+ }
model.safetensors ADDED
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+ oid sha256:dd396e26f8cb792dfff27a955e379c43f84082f3686444b412903e459d53f211
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+ size 3889391512
modeling_llama.py ADDED
@@ -0,0 +1,1013 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ # coding=utf-8
2
+ # Copyright 2022 EleutherAI and the HuggingFace Inc. team. All rights reserved.
3
+ #
4
+ # This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
5
+ # and OPT implementations in this library. It has been modified from its
6
+ # original forms to accommodate minor architectural differences compared
7
+ # to GPT-NeoX and OPT used by the Meta AI team that trained the model.
8
+ #
9
+ # Licensed under the Apache License, Version 2.0 (the "License");
10
+ # you may not use this file except in compliance with the License.
11
+ # You may obtain a copy of the License at
12
+ #
13
+ # http://www.apache.org/licenses/LICENSE-2.0
14
+ #
15
+ # Unless required by applicable law or agreed to in writing, software
16
+ # distributed under the License is distributed on an "AS IS" BASIS,
17
+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18
+ # See the License for the specific language governing permissions and
19
+ # limitations under the License.
20
+ """ PyTorch LLaMA model."""
21
+ import math
22
+ from typing import List, Optional, Tuple, Union
23
+
24
+ import torch
25
+ import torch.nn.functional as F
26
+ import torch.utils.checkpoint
27
+ from torch import nn
28
+ from torch.nn import BCEWithLogitsLoss, CrossEntropyLoss, MSELoss
29
+
30
+ from transformers.activations import ACT2FN
31
+ from transformers.modeling_outputs import BaseModelOutputWithPast, CausalLMOutputWithPast, SequenceClassifierOutputWithPast
32
+ from transformers.modeling_utils import PreTrainedModel
33
+ from transformers.utils import add_start_docstrings, add_start_docstrings_to_model_forward, logging, replace_return_docstrings
34
+ from .configuration_llama import LlamaConfig
35
+
36
+
37
+ logger = logging.get_logger(__name__)
38
+
39
+ _CONFIG_FOR_DOC = "LlamaConfig"
40
+
41
+
42
+ # Copied from transformers.models.bart.modeling_bart._make_causal_mask
43
+ def _make_causal_mask(
44
+ input_ids_shape: torch.Size, dtype: torch.dtype, device: torch.device, past_key_values_length: int = 0
45
+ ):
46
+ """
47
+ Make causal mask used for bi-directional self-attention.
48
+ """
49
+ bsz, tgt_len = input_ids_shape
50
+ mask = torch.full((tgt_len, tgt_len), torch.finfo(dtype).min, device=device)
51
+ mask_cond = torch.arange(mask.size(-1), device=device)
52
+ mask.masked_fill_(mask_cond < (mask_cond + 1).view(mask.size(-1), 1), 0)
53
+ mask = mask.to(dtype)
54
+
55
+ if past_key_values_length > 0:
56
+ mask = torch.cat([torch.zeros(tgt_len, past_key_values_length, dtype=dtype, device=device), mask], dim=-1)
57
+ return mask[None, None, :, :].expand(bsz, 1, tgt_len, tgt_len + past_key_values_length)
58
+
59
+
60
+ # Copied from transformers.models.bart.modeling_bart._expand_mask
61
+ def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int] = None):
62
+ """
63
+ Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
64
+ """
65
+ bsz, src_len = mask.size()
66
+ tgt_len = tgt_len if tgt_len is not None else src_len
67
+
68
+ expanded_mask = mask[:, None, None, :].expand(bsz, 1, tgt_len, src_len).to(dtype)
69
+
70
+ inverted_mask = 1.0 - expanded_mask
71
+
72
+ return inverted_mask.masked_fill(inverted_mask.to(torch.bool), torch.finfo(dtype).min)
73
+
74
+
75
+ class LlamaRMSNorm(nn.Module):
76
+ def __init__(self, hidden_size, eps=1e-6):
77
+ """
78
+ LlamaRMSNorm is equivalent to T5LayerNorm
79
+ """
80
+ super().__init__()
81
+ self.weight = nn.Parameter(torch.ones(hidden_size))
82
+ self.variance_epsilon = eps
83
+
84
+ def forward(self, hidden_states):
85
+ input_dtype = hidden_states.dtype
86
+ hidden_states = hidden_states.to(torch.float32)
87
+ variance = hidden_states.pow(2).mean(-1, keepdim=True)
88
+ hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
89
+ return self.weight * hidden_states.to(input_dtype)
90
+
91
+
92
+ class LlamaRotaryEmbedding(torch.nn.Module):
93
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
94
+ super().__init__()
95
+
96
+ self.dim = dim
97
+ self.max_position_embeddings = max_position_embeddings
98
+ self.base = base
99
+ inv_freq = 1.0 / (self.base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
100
+ self.register_buffer("inv_freq", inv_freq)
101
+
102
+ # Build here to make `torch.jit.trace` work.
103
+ self._set_cos_sin_cache(
104
+ seq_len=max_position_embeddings, device=self.inv_freq.device, dtype=torch.get_default_dtype()
105
+ )
106
+
107
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
108
+ self.max_seq_len_cached = seq_len
109
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
110
+
111
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
112
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
113
+ emb = torch.cat((freqs, freqs), dim=-1)
114
+ self.register_buffer("cos_cached", emb.cos()[None, None, :, :].to(dtype), persistent=False)
115
+ self.register_buffer("sin_cached", emb.sin()[None, None, :, :].to(dtype), persistent=False)
116
+
117
+ def forward(self, x, seq_len=None):
118
+ # x: [bs, num_attention_heads, seq_len, head_size]
119
+ if seq_len > self.max_seq_len_cached:
120
+ self._set_cos_sin_cache(seq_len=seq_len, device=x.device, dtype=x.dtype)
121
+
122
+ return (
123
+ self.cos_cached[:, :, :seq_len, ...].to(dtype=x.dtype),
124
+ self.sin_cached[:, :, :seq_len, ...].to(dtype=x.dtype),
125
+ )
126
+
127
+
128
+ class LlamaLinearScalingRotaryEmbedding(LlamaRotaryEmbedding):
129
+ """LlamaRotaryEmbedding extended with linear scaling. Credits to the Reddit user /u/kaiokendev"""
130
+
131
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
132
+ self.scaling_factor = scaling_factor
133
+ super().__init__(dim, max_position_embeddings, base, device)
134
+
135
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
136
+ self.max_seq_len_cached = seq_len
137
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
138
+ t = t / self.scaling_factor
139
+
140
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
141
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
142
+ emb = torch.cat((freqs, freqs), dim=-1)
143
+ self.register_buffer("cos_cached", emb.cos()[None, None, :, :].to(dtype), persistent=False)
144
+ self.register_buffer("sin_cached", emb.sin()[None, None, :, :].to(dtype), persistent=False)
145
+
146
+
147
+ class LlamaDynamicNTKScalingRotaryEmbedding(LlamaRotaryEmbedding):
148
+ """LlamaRotaryEmbedding extended with Dynamic NTK scaling. Credits to the Reddit users /u/bloc97 and /u/emozilla"""
149
+
150
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
151
+ self.scaling_factor = scaling_factor
152
+ super().__init__(dim, max_position_embeddings, base, device)
153
+
154
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
155
+ self.max_seq_len_cached = seq_len
156
+
157
+ if seq_len > self.max_position_embeddings:
158
+ base = self.base * (
159
+ (self.scaling_factor * seq_len / self.max_position_embeddings) - (self.scaling_factor - 1)
160
+ ) ** (self.dim / (self.dim - 2))
161
+ inv_freq = 1.0 / (base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
162
+ self.register_buffer("inv_freq", inv_freq)
163
+
164
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
165
+
166
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
167
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
168
+ emb = torch.cat((freqs, freqs), dim=-1)
169
+ self.register_buffer("cos_cached", emb.cos()[None, None, :, :].to(dtype), persistent=False)
170
+ self.register_buffer("sin_cached", emb.sin()[None, None, :, :].to(dtype), persistent=False)
171
+
172
+
173
+ def rotate_half(x):
174
+ """Rotates half the hidden dims of the input."""
175
+ x1 = x[..., : x.shape[-1] // 2]
176
+ x2 = x[..., x.shape[-1] // 2 :]
177
+ return torch.cat((-x2, x1), dim=-1)
178
+
179
+
180
+ def apply_rotary_pos_emb(q, k, cos, sin, position_ids):
181
+ # The first two dimensions of cos and sin are always 1, so we can `squeeze` them.
182
+ cos = cos.squeeze(1).squeeze(0) # [seq_len, dim]
183
+ sin = sin.squeeze(1).squeeze(0) # [seq_len, dim]
184
+ cos = cos[position_ids].unsqueeze(1) # [bs, 1, seq_len, dim]
185
+ sin = sin[position_ids].unsqueeze(1) # [bs, 1, seq_len, dim]
186
+ q_embed = (q * cos) + (rotate_half(q) * sin)
187
+ k_embed = (k * cos) + (rotate_half(k) * sin)
188
+ return q_embed, k_embed
189
+
190
+
191
+ class LlamaMLP(nn.Module):
192
+ def __init__(self, config):
193
+ super().__init__()
194
+ self.config = config
195
+ self.hidden_size = config.hidden_size
196
+ self.intermediate_size = config.intermediate_size
197
+ self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
198
+ self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
199
+ self.down_proj = nn.Linear(self.intermediate_size, self.hidden_size, bias=False)
200
+ self.act_fn = ACT2FN[config.hidden_act]
201
+
202
+ def forward(self, x):
203
+ if self.config.pretraining_tp > 1:
204
+ slice = self.intermediate_size // self.config.pretraining_tp
205
+ gate_proj_slices = self.gate_proj.weight.split(slice, dim=0)
206
+ up_proj_slices = self.up_proj.weight.split(slice, dim=0)
207
+ down_proj_slices = self.down_proj.weight.split(slice, dim=1)
208
+
209
+ gate_proj = torch.cat(
210
+ [F.linear(x, gate_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1
211
+ )
212
+ up_proj = torch.cat([F.linear(x, up_proj_slices[i]) for i in range(self.config.pretraining_tp)], dim=-1)
213
+
214
+ intermediate_states = (self.act_fn(gate_proj) * up_proj).split(slice, dim=2)
215
+ down_proj = [
216
+ F.linear(intermediate_states[i], down_proj_slices[i]) for i in range(self.config.pretraining_tp)
217
+ ]
218
+ down_proj = sum(down_proj)
219
+ else:
220
+ down_proj = self.down_proj(self.act_fn(self.gate_proj(x)) * self.up_proj(x))
221
+
222
+ return down_proj
223
+
224
+
225
+ def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
226
+ """
227
+ This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
228
+ num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
229
+ """
230
+ batch, num_key_value_heads, slen, head_dim = hidden_states.shape
231
+ if n_rep == 1:
232
+ return hidden_states
233
+ hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
234
+ return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
235
+
236
+
237
+ class LlamaAttention(nn.Module):
238
+ """Multi-headed attention from 'Attention Is All You Need' paper"""
239
+
240
+ def __init__(self, config: LlamaConfig):
241
+ super().__init__()
242
+ self.config = config
243
+ self.hidden_size = config.hidden_size
244
+ self.num_heads = config.num_attention_heads
245
+ self.head_dim = self.hidden_size // self.num_heads
246
+ self.num_key_value_heads = config.num_key_value_heads
247
+ self.num_key_value_groups = self.num_heads // self.num_key_value_heads
248
+ self.max_position_embeddings = config.max_position_embeddings
249
+
250
+ if (self.head_dim * self.num_heads) != self.hidden_size:
251
+ raise ValueError(
252
+ f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
253
+ f" and `num_heads`: {self.num_heads})."
254
+ )
255
+ self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=False)
256
+ self.k_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=False)
257
+ self.v_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=False)
258
+ self.o_proj = nn.Linear(self.num_heads * self.head_dim, self.hidden_size, bias=False)
259
+ self._init_rope()
260
+
261
+ def _init_rope(self):
262
+ if self.config.rope_scaling is None:
263
+ self.rotary_emb = LlamaRotaryEmbedding(self.head_dim, max_position_embeddings=self.max_position_embeddings)
264
+ else:
265
+ scaling_type = self.config.rope_scaling["type"]
266
+ scaling_factor = self.config.rope_scaling["factor"]
267
+ if scaling_type == "linear":
268
+ self.rotary_emb = LlamaLinearScalingRotaryEmbedding(
269
+ self.head_dim, max_position_embeddings=self.max_position_embeddings, scaling_factor=scaling_factor
270
+ )
271
+ elif scaling_type == "dynamic":
272
+ self.rotary_emb = LlamaDynamicNTKScalingRotaryEmbedding(
273
+ self.head_dim, max_position_embeddings=self.max_position_embeddings, scaling_factor=scaling_factor
274
+ )
275
+ else:
276
+ raise ValueError(f"Unknown RoPE scaling type {scaling_type}")
277
+
278
+ def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int):
279
+ return tensor.view(bsz, seq_len, self.num_heads, self.head_dim).transpose(1, 2).contiguous()
280
+
281
+ def forward(
282
+ self,
283
+ hidden_states: torch.Tensor,
284
+ attention_mask: Optional[torch.Tensor] = None,
285
+ position_ids: Optional[torch.LongTensor] = None,
286
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
287
+ output_attentions: bool = False,
288
+ use_cache: bool = False,
289
+ ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
290
+ bsz, q_len, _ = hidden_states.size()
291
+
292
+ if self.config.pretraining_tp > 1:
293
+ key_value_slicing = (self.num_key_value_heads * self.head_dim) // self.config.pretraining_tp
294
+ query_slices = self.q_proj.weight.split(
295
+ (self.num_heads * self.head_dim) // self.config.pretraining_tp, dim=0
296
+ )
297
+ key_slices = self.k_proj.weight.split(key_value_slicing, dim=0)
298
+ value_slices = self.v_proj.weight.split(key_value_slicing, dim=0)
299
+
300
+ query_states = [F.linear(hidden_states, query_slices[i]) for i in range(self.config.pretraining_tp)]
301
+ query_states = torch.cat(query_states, dim=-1)
302
+
303
+ key_states = [F.linear(hidden_states, key_slices[i]) for i in range(self.config.pretraining_tp)]
304
+ key_states = torch.cat(key_states, dim=-1)
305
+
306
+ value_states = [F.linear(hidden_states, value_slices[i]) for i in range(self.config.pretraining_tp)]
307
+ value_states = torch.cat(value_states, dim=-1)
308
+
309
+ else:
310
+ query_states = self.q_proj(hidden_states)
311
+ key_states = self.k_proj(hidden_states)
312
+ value_states = self.v_proj(hidden_states)
313
+
314
+ query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
315
+ key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
316
+ value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
317
+
318
+ kv_seq_len = key_states.shape[-2]
319
+ if past_key_value is not None:
320
+ kv_seq_len += past_key_value[0].shape[-2]
321
+ cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
322
+ query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
323
+
324
+ if past_key_value is not None:
325
+ # reuse k, v, self_attention
326
+ key_states = torch.cat([past_key_value[0], key_states], dim=2)
327
+ value_states = torch.cat([past_key_value[1], value_states], dim=2)
328
+
329
+ past_key_value = (key_states, value_states) if use_cache else None
330
+
331
+ # repeat k/v heads if n_kv_heads < n_heads
332
+ key_states = repeat_kv(key_states, self.num_key_value_groups)
333
+ value_states = repeat_kv(value_states, self.num_key_value_groups)
334
+
335
+ attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
336
+
337
+ if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
338
+ raise ValueError(
339
+ f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
340
+ f" {attn_weights.size()}"
341
+ )
342
+
343
+ if attention_mask is not None:
344
+ if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
345
+ raise ValueError(
346
+ f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
347
+ )
348
+ attn_weights = attn_weights + attention_mask
349
+
350
+ # upcast attention to fp32
351
+ attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
352
+ attn_output = torch.matmul(attn_weights, value_states)
353
+
354
+ if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
355
+ raise ValueError(
356
+ f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is"
357
+ f" {attn_output.size()}"
358
+ )
359
+
360
+ attn_output = attn_output.transpose(1, 2).contiguous()
361
+ attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
362
+
363
+ if self.config.pretraining_tp > 1:
364
+ attn_output = attn_output.split(self.hidden_size // self.config.pretraining_tp, dim=2)
365
+ o_proj_slices = self.o_proj.weight.split(self.hidden_size // self.config.pretraining_tp, dim=1)
366
+ attn_output = sum([F.linear(attn_output[i], o_proj_slices[i]) for i in range(self.config.pretraining_tp)])
367
+ else:
368
+ attn_output = self.o_proj(attn_output)
369
+
370
+ if not output_attentions:
371
+ attn_weights = None
372
+
373
+ return attn_output, attn_weights, past_key_value
374
+
375
+
376
+ class LlamaDecoderLayer(nn.Module):
377
+ def __init__(self, config: LlamaConfig):
378
+ super().__init__()
379
+ self.hidden_size = config.hidden_size
380
+ self.self_attn = LlamaAttention(config=config)
381
+ self.mlp = LlamaMLP(config)
382
+ self.input_layernorm = LlamaRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
383
+ self.post_attention_layernorm = LlamaRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
384
+
385
+ def forward(
386
+ self,
387
+ hidden_states: torch.Tensor,
388
+ attention_mask: Optional[torch.Tensor] = None,
389
+ position_ids: Optional[torch.LongTensor] = None,
390
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
391
+ output_attentions: Optional[bool] = False,
392
+ use_cache: Optional[bool] = False,
393
+ ) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]]:
394
+ """
395
+ Args:
396
+ hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
397
+ attention_mask (`torch.FloatTensor`, *optional*): attention mask of size
398
+ `(batch, 1, tgt_len, src_len)` where padding elements are indicated by very large negative values.
399
+ output_attentions (`bool`, *optional*):
400
+ Whether or not to return the attentions tensors of all attention layers. See `attentions` under
401
+ returned tensors for more detail.
402
+ use_cache (`bool`, *optional*):
403
+ If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
404
+ (see `past_key_values`).
405
+ past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
406
+ """
407
+
408
+ residual = hidden_states
409
+
410
+ hidden_states = self.input_layernorm(hidden_states)
411
+
412
+ # Self Attention
413
+ hidden_states, self_attn_weights, present_key_value = self.self_attn(
414
+ hidden_states=hidden_states,
415
+ attention_mask=attention_mask,
416
+ position_ids=position_ids,
417
+ past_key_value=past_key_value,
418
+ output_attentions=output_attentions,
419
+ use_cache=use_cache,
420
+ )
421
+ hidden_states = residual + hidden_states
422
+
423
+ # Fully Connected
424
+ residual = hidden_states
425
+ hidden_states = self.post_attention_layernorm(hidden_states)
426
+ hidden_states = self.mlp(hidden_states)
427
+ hidden_states = residual + hidden_states
428
+
429
+ outputs = (hidden_states,)
430
+
431
+ if output_attentions:
432
+ outputs += (self_attn_weights,)
433
+
434
+ if use_cache:
435
+ outputs += (present_key_value,)
436
+
437
+ return outputs
438
+
439
+
440
+ LLAMA_START_DOCSTRING = r"""
441
+ This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
442
+ library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
443
+ etc.)
444
+
445
+ This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
446
+ Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
447
+ and behavior.
448
+
449
+ Parameters:
450
+ config ([`LlamaConfig`]):
451
+ Model configuration class with all the parameters of the model. Initializing with a config file does not
452
+ load the weights associated with the model, only the configuration. Check out the
453
+ [`~PreTrainedModel.from_pretrained`] method to load the model weights.
454
+ """
455
+
456
+
457
+ @add_start_docstrings(
458
+ "The bare LLaMA Model outputting raw hidden-states without any specific head on top.",
459
+ LLAMA_START_DOCSTRING,
460
+ )
461
+ class LlamaPreTrainedModel(PreTrainedModel):
462
+ config_class = LlamaConfig
463
+ base_model_prefix = "model"
464
+ supports_gradient_checkpointing = True
465
+ _no_split_modules = ["LlamaDecoderLayer"]
466
+ _skip_keys_device_placement = "past_key_values"
467
+
468
+ def _init_weights(self, module):
469
+ std = self.config.initializer_range
470
+ if isinstance(module, nn.Linear):
471
+ module.weight.data.normal_(mean=0.0, std=std)
472
+ if module.bias is not None:
473
+ module.bias.data.zero_()
474
+ elif isinstance(module, nn.Embedding):
475
+ module.weight.data.normal_(mean=0.0, std=std)
476
+ if module.padding_idx is not None:
477
+ module.weight.data[module.padding_idx].zero_()
478
+
479
+ def _set_gradient_checkpointing(self, module, value=False):
480
+ if isinstance(module, LlamaModel):
481
+ module.gradient_checkpointing = value
482
+
483
+
484
+ LLAMA_INPUTS_DOCSTRING = r"""
485
+ Args:
486
+ input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
487
+ Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
488
+ it.
489
+
490
+ Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
491
+ [`PreTrainedTokenizer.__call__`] for details.
492
+
493
+ [What are input IDs?](../glossary#input-ids)
494
+ attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
495
+ Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
496
+
497
+ - 1 for tokens that are **not masked**,
498
+ - 0 for tokens that are **masked**.
499
+
500
+ [What are attention masks?](../glossary#attention-mask)
501
+
502
+ Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
503
+ [`PreTrainedTokenizer.__call__`] for details.
504
+
505
+ If `past_key_values` is used, optionally only the last `decoder_input_ids` have to be input (see
506
+ `past_key_values`).
507
+
508
+ If you want to change padding behavior, you should read [`modeling_opt._prepare_decoder_attention_mask`]
509
+ and modify to your needs. See diagram 1 in [the paper](https://arxiv.org/abs/1910.13461) for more
510
+ information on the default strategy.
511
+
512
+ - 1 indicates the head is **not masked**,
513
+ - 0 indicates the head is **masked**.
514
+ position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
515
+ Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
516
+ config.n_positions - 1]`.
517
+
518
+ [What are position IDs?](../glossary#position-ids)
519
+ past_key_values (`tuple(tuple(torch.FloatTensor))`, *optional*, returned when `use_cache=True` is passed or when `config.use_cache=True`):
520
+ Tuple of `tuple(torch.FloatTensor)` of length `config.n_layers`, with each tuple having 2 tensors of shape
521
+ `(batch_size, num_heads, sequence_length, embed_size_per_head)`) and 2 additional tensors of shape
522
+ `(batch_size, num_heads, encoder_sequence_length, embed_size_per_head)`.
523
+
524
+ Contains pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
525
+ blocks) that can be used (see `past_key_values` input) to speed up sequential decoding.
526
+
527
+ If `past_key_values` are used, the user can optionally input only the last `decoder_input_ids` (those that
528
+ don't have their past key value states given to this model) of shape `(batch_size, 1)` instead of all
529
+ `decoder_input_ids` of shape `(batch_size, sequence_length)`.
530
+ inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
531
+ Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
532
+ is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
533
+ model's internal embedding lookup matrix.
534
+ use_cache (`bool`, *optional*):
535
+ If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
536
+ `past_key_values`).
537
+ output_attentions (`bool`, *optional*):
538
+ Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
539
+ tensors for more detail.
540
+ output_hidden_states (`bool`, *optional*):
541
+ Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
542
+ more detail.
543
+ return_dict (`bool`, *optional*):
544
+ Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
545
+ """
546
+
547
+
548
+ @add_start_docstrings(
549
+ "The bare LLaMA Model outputting raw hidden-states without any specific head on top.",
550
+ LLAMA_START_DOCSTRING,
551
+ )
552
+ class LlamaModel(LlamaPreTrainedModel):
553
+ """
554
+ Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`LlamaDecoderLayer`]
555
+
556
+ Args:
557
+ config: LlamaConfig
558
+ """
559
+
560
+ def __init__(self, config: LlamaConfig):
561
+ super().__init__(config)
562
+ self.padding_idx = config.pad_token_id
563
+ self.vocab_size = config.vocab_size
564
+
565
+ self.embed_tokens = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
566
+ self.layers = nn.ModuleList([LlamaDecoderLayer(config) for _ in range(config.num_hidden_layers)])
567
+ self.norm = LlamaRMSNorm(config.hidden_size, eps=config.rms_norm_eps)
568
+
569
+ self.gradient_checkpointing = False
570
+ # Initialize weights and apply final processing
571
+ self.post_init()
572
+
573
+ def get_input_embeddings(self):
574
+ return self.embed_tokens
575
+
576
+ def set_input_embeddings(self, value):
577
+ self.embed_tokens = value
578
+
579
+ # Copied from transformers.models.bart.modeling_bart.BartDecoder._prepare_decoder_attention_mask
580
+ def _prepare_decoder_attention_mask(self, attention_mask, input_shape, inputs_embeds, past_key_values_length):
581
+ # create causal mask
582
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
583
+ combined_attention_mask = None
584
+ if input_shape[-1] > 1:
585
+ combined_attention_mask = _make_causal_mask(
586
+ input_shape,
587
+ inputs_embeds.dtype,
588
+ device=inputs_embeds.device,
589
+ past_key_values_length=past_key_values_length,
590
+ )
591
+
592
+ if attention_mask is not None:
593
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
594
+ expanded_attn_mask = _expand_mask(attention_mask, inputs_embeds.dtype, tgt_len=input_shape[-1]).to(
595
+ inputs_embeds.device
596
+ )
597
+ combined_attention_mask = (
598
+ expanded_attn_mask if combined_attention_mask is None else expanded_attn_mask + combined_attention_mask
599
+ )
600
+
601
+ return combined_attention_mask
602
+
603
+ @add_start_docstrings_to_model_forward(LLAMA_INPUTS_DOCSTRING)
604
+ def forward(
605
+ self,
606
+ input_ids: torch.LongTensor = None,
607
+ attention_mask: Optional[torch.Tensor] = None,
608
+ position_ids: Optional[torch.LongTensor] = None,
609
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
610
+ inputs_embeds: Optional[torch.FloatTensor] = None,
611
+ use_cache: Optional[bool] = None,
612
+ output_attentions: Optional[bool] = None,
613
+ output_hidden_states: Optional[bool] = None,
614
+ return_dict: Optional[bool] = None,
615
+ ) -> Union[Tuple, BaseModelOutputWithPast]:
616
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
617
+ output_hidden_states = (
618
+ output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
619
+ )
620
+ use_cache = use_cache if use_cache is not None else self.config.use_cache
621
+
622
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
623
+
624
+ # retrieve input_ids and inputs_embeds
625
+ if input_ids is not None and inputs_embeds is not None:
626
+ raise ValueError("You cannot specify both decoder_input_ids and decoder_inputs_embeds at the same time")
627
+ elif input_ids is not None:
628
+ batch_size, seq_length = input_ids.shape
629
+ elif inputs_embeds is not None:
630
+ batch_size, seq_length, _ = inputs_embeds.shape
631
+ else:
632
+ raise ValueError("You have to specify either decoder_input_ids or decoder_inputs_embeds")
633
+
634
+ seq_length_with_past = seq_length
635
+ past_key_values_length = 0
636
+
637
+ if past_key_values is not None:
638
+ past_key_values_length = past_key_values[0][0].shape[2]
639
+ seq_length_with_past = seq_length_with_past + past_key_values_length
640
+
641
+ if position_ids is None:
642
+ device = input_ids.device if input_ids is not None else inputs_embeds.device
643
+ position_ids = torch.arange(
644
+ past_key_values_length, seq_length + past_key_values_length, dtype=torch.long, device=device
645
+ )
646
+ position_ids = position_ids.unsqueeze(0).view(-1, seq_length)
647
+ else:
648
+ position_ids = position_ids.view(-1, seq_length).long()
649
+
650
+ if inputs_embeds is None:
651
+ inputs_embeds = self.embed_tokens(input_ids)
652
+ # embed positions
653
+ if attention_mask is None:
654
+ attention_mask = torch.ones(
655
+ (batch_size, seq_length_with_past), dtype=torch.bool, device=inputs_embeds.device
656
+ )
657
+ attention_mask = self._prepare_decoder_attention_mask(
658
+ attention_mask, (batch_size, seq_length), inputs_embeds, past_key_values_length
659
+ )
660
+
661
+ hidden_states = inputs_embeds
662
+
663
+ if self.gradient_checkpointing and self.training:
664
+ if use_cache:
665
+ logger.warning_once(
666
+ "`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`..."
667
+ )
668
+ use_cache = False
669
+
670
+ # decoder layers
671
+ all_hidden_states = () if output_hidden_states else None
672
+ all_self_attns = () if output_attentions else None
673
+ next_decoder_cache = () if use_cache else None
674
+
675
+ for idx, decoder_layer in enumerate(self.layers):
676
+ if output_hidden_states:
677
+ all_hidden_states += (hidden_states,)
678
+
679
+ past_key_value = past_key_values[idx] if past_key_values is not None else None
680
+
681
+ if self.gradient_checkpointing and self.training:
682
+
683
+ def create_custom_forward(module):
684
+ def custom_forward(*inputs):
685
+ # None for past_key_value
686
+ return module(*inputs, output_attentions, None)
687
+
688
+ return custom_forward
689
+
690
+ layer_outputs = torch.utils.checkpoint.checkpoint(
691
+ create_custom_forward(decoder_layer),
692
+ hidden_states,
693
+ attention_mask,
694
+ position_ids,
695
+ None,
696
+ )
697
+ else:
698
+ layer_outputs = decoder_layer(
699
+ hidden_states,
700
+ attention_mask=attention_mask,
701
+ position_ids=position_ids,
702
+ past_key_value=past_key_value,
703
+ output_attentions=output_attentions,
704
+ use_cache=use_cache,
705
+ )
706
+
707
+ hidden_states = layer_outputs[0]
708
+
709
+ if use_cache:
710
+ next_decoder_cache += (layer_outputs[2 if output_attentions else 1],)
711
+
712
+ if output_attentions:
713
+ all_self_attns += (layer_outputs[1],)
714
+
715
+ hidden_states = self.norm(hidden_states)
716
+
717
+ # add hidden states from the last decoder layer
718
+ if output_hidden_states:
719
+ all_hidden_states += (hidden_states,)
720
+
721
+ next_cache = next_decoder_cache if use_cache else None
722
+ if not return_dict:
723
+ return tuple(v for v in [hidden_states, next_cache, all_hidden_states, all_self_attns] if v is not None)
724
+ return BaseModelOutputWithPast(
725
+ last_hidden_state=hidden_states,
726
+ past_key_values=next_cache,
727
+ hidden_states=all_hidden_states,
728
+ attentions=all_self_attns,
729
+ )
730
+
731
+
732
+ class LlamaForCausalLM(LlamaPreTrainedModel):
733
+ _tied_weights_keys = ["lm_head.weight"]
734
+
735
+ def __init__(self, config):
736
+ super().__init__(config)
737
+ self.model = LlamaModel(config)
738
+ self.vocab_size = config.vocab_size
739
+ self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
740
+
741
+ # Initialize weights and apply final processing
742
+ self.post_init()
743
+
744
+ def get_input_embeddings(self):
745
+ return self.model.embed_tokens
746
+
747
+ def set_input_embeddings(self, value):
748
+ self.model.embed_tokens = value
749
+
750
+ def get_output_embeddings(self):
751
+ return self.lm_head
752
+
753
+ def set_output_embeddings(self, new_embeddings):
754
+ self.lm_head = new_embeddings
755
+
756
+ def set_decoder(self, decoder):
757
+ self.model = decoder
758
+
759
+ def get_decoder(self):
760
+ return self.model
761
+
762
+ @add_start_docstrings_to_model_forward(LLAMA_INPUTS_DOCSTRING)
763
+ @replace_return_docstrings(output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
764
+ def forward(
765
+ self,
766
+ input_ids: torch.LongTensor = None,
767
+ attention_mask: Optional[torch.Tensor] = None,
768
+ position_ids: Optional[torch.LongTensor] = None,
769
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
770
+ inputs_embeds: Optional[torch.FloatTensor] = None,
771
+ labels: Optional[torch.LongTensor] = None,
772
+ use_cache: Optional[bool] = None,
773
+ output_attentions: Optional[bool] = None,
774
+ output_hidden_states: Optional[bool] = None,
775
+ return_dict: Optional[bool] = None,
776
+ ) -> Union[Tuple, CausalLMOutputWithPast]:
777
+ r"""
778
+ Args:
779
+ labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
780
+ Labels for computing the masked language modeling loss. Indices should either be in `[0, ...,
781
+ config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
782
+ (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`.
783
+
784
+ Returns:
785
+
786
+ Example:
787
+
788
+ ```python
789
+ >>> from transformers import AutoTokenizer, LlamaForCausalLM
790
+
791
+ >>> model = LlamaForCausalLM.from_pretrained(PATH_TO_CONVERTED_WEIGHTS)
792
+ >>> tokenizer = AutoTokenizer.from_pretrained(PATH_TO_CONVERTED_TOKENIZER)
793
+
794
+ >>> prompt = "Hey, are you conscious? Can you talk to me?"
795
+ >>> inputs = tokenizer(prompt, return_tensors="pt")
796
+
797
+ >>> # Generate
798
+ >>> generate_ids = model.generate(inputs.input_ids, max_length=30)
799
+ >>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
800
+ "Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
801
+ ```"""
802
+
803
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
804
+ output_hidden_states = (
805
+ output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
806
+ )
807
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
808
+
809
+ # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
810
+ outputs = self.model(
811
+ input_ids=input_ids,
812
+ attention_mask=attention_mask,
813
+ position_ids=position_ids,
814
+ past_key_values=past_key_values,
815
+ inputs_embeds=inputs_embeds,
816
+ use_cache=use_cache,
817
+ output_attentions=output_attentions,
818
+ output_hidden_states=output_hidden_states,
819
+ return_dict=return_dict,
820
+ )
821
+
822
+ hidden_states = outputs[0]
823
+ if self.config.pretraining_tp > 1:
824
+ lm_head_slices = self.lm_head.weight.split(self.vocab_size // self.config.pretraining_tp, dim=0)
825
+ logits = [F.linear(hidden_states, lm_head_slices[i]) for i in range(self.config.pretraining_tp)]
826
+ logits = torch.cat(logits, dim=-1)
827
+ else:
828
+ logits = self.lm_head(hidden_states)
829
+ logits = logits.float()
830
+
831
+ loss = None
832
+ if labels is not None:
833
+ # Shift so that tokens < n predict n
834
+ shift_logits = logits[..., :-1, :].contiguous()
835
+ shift_labels = labels[..., 1:].contiguous()
836
+ # Flatten the tokens
837
+ loss_fct = CrossEntropyLoss()
838
+ shift_logits = shift_logits.view(-1, self.config.vocab_size)
839
+ shift_labels = shift_labels.view(-1)
840
+ # Enable model parallelism
841
+ shift_labels = shift_labels.to(shift_logits.device)
842
+ loss = loss_fct(shift_logits, shift_labels)
843
+
844
+ if not return_dict:
845
+ output = (logits,) + outputs[1:]
846
+ return (loss,) + output if loss is not None else output
847
+
848
+ return CausalLMOutputWithPast(
849
+ loss=loss,
850
+ logits=logits,
851
+ past_key_values=outputs.past_key_values,
852
+ hidden_states=outputs.hidden_states,
853
+ attentions=outputs.attentions,
854
+ )
855
+
856
+ def prepare_inputs_for_generation(
857
+ self, input_ids, past_key_values=None, attention_mask=None, inputs_embeds=None, **kwargs
858
+ ):
859
+ if past_key_values:
860
+ input_ids = input_ids[:, -1:]
861
+
862
+ position_ids = kwargs.get("position_ids", None)
863
+ if attention_mask is not None and position_ids is None:
864
+ # create position_ids on the fly for batch generation
865
+ position_ids = attention_mask.long().cumsum(-1) - 1
866
+ position_ids.masked_fill_(attention_mask == 0, 1)
867
+ if past_key_values:
868
+ position_ids = position_ids[:, -1].unsqueeze(-1)
869
+
870
+ # if `inputs_embeds` are passed, we only want to use them in the 1st generation step
871
+ if inputs_embeds is not None and past_key_values is None:
872
+ model_inputs = {"inputs_embeds": inputs_embeds}
873
+ else:
874
+ model_inputs = {"input_ids": input_ids}
875
+
876
+ model_inputs.update(
877
+ {
878
+ "position_ids": position_ids,
879
+ "past_key_values": past_key_values,
880
+ "use_cache": kwargs.get("use_cache"),
881
+ "attention_mask": attention_mask,
882
+ }
883
+ )
884
+ return model_inputs
885
+
886
+ @staticmethod
887
+ def _reorder_cache(past_key_values, beam_idx):
888
+ reordered_past = ()
889
+ for layer_past in past_key_values:
890
+ reordered_past += (
891
+ tuple(past_state.index_select(0, beam_idx.to(past_state.device)) for past_state in layer_past),
892
+ )
893
+ return reordered_past
894
+
895
+
896
+ @add_start_docstrings(
897
+ """
898
+ The LLaMa Model transformer with a sequence classification head on top (linear layer).
899
+
900
+ [`LlamaForSequenceClassification`] uses the last token in order to do the classification, as other causal models
901
+ (e.g. GPT-2) do.
902
+
903
+ Since it does classification on the last token, it requires to know the position of the last token. If a
904
+ `pad_token_id` is defined in the configuration, it finds the last token that is not a padding token in each row. If
905
+ no `pad_token_id` is defined, it simply takes the last value in each row of the batch. Since it cannot guess the
906
+ padding tokens when `inputs_embeds` are passed instead of `input_ids`, it does the same (take the last value in
907
+ each row of the batch).
908
+ """,
909
+ LLAMA_START_DOCSTRING,
910
+ )
911
+ class LlamaForSequenceClassification(LlamaPreTrainedModel):
912
+ def __init__(self, config):
913
+ super().__init__(config)
914
+ self.num_labels = config.num_labels
915
+ self.model = LlamaModel(config)
916
+ self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
917
+
918
+ # Initialize weights and apply final processing
919
+ self.post_init()
920
+
921
+ def get_input_embeddings(self):
922
+ return self.model.embed_tokens
923
+
924
+ def set_input_embeddings(self, value):
925
+ self.model.embed_tokens = value
926
+
927
+ @add_start_docstrings_to_model_forward(LLAMA_INPUTS_DOCSTRING)
928
+ def forward(
929
+ self,
930
+ input_ids: torch.LongTensor = None,
931
+ attention_mask: Optional[torch.Tensor] = None,
932
+ position_ids: Optional[torch.LongTensor] = None,
933
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
934
+ inputs_embeds: Optional[torch.FloatTensor] = None,
935
+ labels: Optional[torch.LongTensor] = None,
936
+ use_cache: Optional[bool] = None,
937
+ output_attentions: Optional[bool] = None,
938
+ output_hidden_states: Optional[bool] = None,
939
+ return_dict: Optional[bool] = None,
940
+ ) -> Union[Tuple, SequenceClassifierOutputWithPast]:
941
+ r"""
942
+ labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
943
+ Labels for computing the sequence classification/regression loss. Indices should be in `[0, ...,
944
+ config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
945
+ `config.num_labels > 1` a classification loss is computed (Cross-Entropy).
946
+ """
947
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
948
+
949
+ transformer_outputs = self.model(
950
+ input_ids,
951
+ attention_mask=attention_mask,
952
+ position_ids=position_ids,
953
+ past_key_values=past_key_values,
954
+ inputs_embeds=inputs_embeds,
955
+ use_cache=use_cache,
956
+ output_attentions=output_attentions,
957
+ output_hidden_states=output_hidden_states,
958
+ return_dict=return_dict,
959
+ )
960
+ hidden_states = transformer_outputs[0]
961
+ logits = self.score(hidden_states)
962
+
963
+ if input_ids is not None:
964
+ batch_size = input_ids.shape[0]
965
+ else:
966
+ batch_size = inputs_embeds.shape[0]
967
+
968
+ if self.config.pad_token_id is None and batch_size != 1:
969
+ raise ValueError("Cannot handle batch sizes > 1 if no padding token is defined.")
970
+ if self.config.pad_token_id is None:
971
+ sequence_lengths = -1
972
+ else:
973
+ if input_ids is not None:
974
+ sequence_lengths = (torch.ne(input_ids, self.config.pad_token_id).sum(-1) - 1).to(logits.device)
975
+ else:
976
+ sequence_lengths = -1
977
+
978
+ pooled_logits = logits[torch.arange(batch_size, device=logits.device), sequence_lengths]
979
+
980
+ loss = None
981
+ if labels is not None:
982
+ labels = labels.to(logits.device)
983
+ if self.config.problem_type is None:
984
+ if self.num_labels == 1:
985
+ self.config.problem_type = "regression"
986
+ elif self.num_labels > 1 and (labels.dtype == torch.long or labels.dtype == torch.int):
987
+ self.config.problem_type = "single_label_classification"
988
+ else:
989
+ self.config.problem_type = "multi_label_classification"
990
+
991
+ if self.config.problem_type == "regression":
992
+ loss_fct = MSELoss()
993
+ if self.num_labels == 1:
994
+ loss = loss_fct(pooled_logits.squeeze(), labels.squeeze())
995
+ else:
996
+ loss = loss_fct(pooled_logits, labels)
997
+ elif self.config.problem_type == "single_label_classification":
998
+ loss_fct = CrossEntropyLoss()
999
+ loss = loss_fct(pooled_logits.view(-1, self.num_labels), labels.view(-1))
1000
+ elif self.config.problem_type == "multi_label_classification":
1001
+ loss_fct = BCEWithLogitsLoss()
1002
+ loss = loss_fct(pooled_logits, labels)
1003
+ if not return_dict:
1004
+ output = (pooled_logits,) + transformer_outputs[1:]
1005
+ return ((loss,) + output) if loss is not None else output
1006
+
1007
+ return SequenceClassifierOutputWithPast(
1008
+ loss=loss,
1009
+ logits=pooled_logits,
1010
+ past_key_values=transformer_outputs.past_key_values,
1011
+ hidden_states=transformer_outputs.hidden_states,
1012
+ attentions=transformer_outputs.attentions,
1013
+ )
quant_config.json ADDED
@@ -0,0 +1,6 @@
 
 
 
 
 
 
 
1
+ {
2
+ "zero_point": true,
3
+ "q_group_size": 128,
4
+ "w_bit": 4,
5
+ "version": "GEMM"
6
+ }
special_tokens_map.json ADDED
@@ -0,0 +1,24 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ {
2
+ "bos_token": {
3
+ "content": "<s>",
4
+ "lstrip": false,
5
+ "normalized": true,
6
+ "rstrip": false,
7
+ "single_word": false
8
+ },
9
+ "eos_token": {
10
+ "content": "</s>",
11
+ "lstrip": false,
12
+ "normalized": true,
13
+ "rstrip": false,
14
+ "single_word": false
15
+ },
16
+ "pad_token": "<unk>",
17
+ "unk_token": {
18
+ "content": "<unk>",
19
+ "lstrip": false,
20
+ "normalized": true,
21
+ "rstrip": false,
22
+ "single_word": false
23
+ }
24
+ }
tokenizer.json ADDED
The diff for this file is too large to render. See raw diff
 
tokenizer.model ADDED
@@ -0,0 +1,3 @@
 
 
 
 
1
+ version https://git-lfs.github.com/spec/v1
2
+ oid sha256:9e556afd44213b6bd1be2b850ebbbd98f5481437a8021afaf58ee7fb1818d347
3
+ size 499723
tokenizer_config.json ADDED
@@ -0,0 +1,34 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ {
2
+ "add_bos_token": true,
3
+ "add_eos_token": false,
4
+ "bos_token": {
5
+ "__type": "AddedToken",
6
+ "content": "<s>",
7
+ "lstrip": false,
8
+ "normalized": true,
9
+ "rstrip": false,
10
+ "single_word": false
11
+ },
12
+ "clean_up_tokenization_spaces": false,
13
+ "eos_token": {
14
+ "__type": "AddedToken",
15
+ "content": "</s>",
16
+ "lstrip": false,
17
+ "normalized": true,
18
+ "rstrip": false,
19
+ "single_word": false
20
+ },
21
+ "legacy": false,
22
+ "model_max_length": 8192,
23
+ "pad_token": null,
24
+ "sp_model_kwargs": {},
25
+ "tokenizer_class": "LlamaTokenizer",
26
+ "unk_token": {
27
+ "__type": "AddedToken",
28
+ "content": "<unk>",
29
+ "lstrip": false,
30
+ "normalized": true,
31
+ "rstrip": false,
32
+ "single_word": false
33
+ }
34
+ }