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| 1 | +# coding=utf-8 |
| 2 | +# Copyright (c) The InternLM team and The HuggingFace Inc. team. All rights reserved. |
| 3 | +# |
| 4 | +# This code is based on transformers/src/transformers/models/llama/configuration_llama.py |
| 5 | +# |
| 6 | +# Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | +# you may not use this file except in compliance with the License. |
| 8 | +# You may obtain a copy of the License at |
| 9 | +# |
| 10 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | +# |
| 12 | +# Unless required by applicable law or agreed to in writing, software |
| 13 | +# distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | +# See the License for the specific language governing permissions and |
| 16 | +# limitations under the License. |
| 17 | +""" InternLM2 model configuration""" |
| 18 | + |
| 19 | +from transformers.configuration_utils import PretrainedConfig |
| 20 | +from transformers.utils import logging |
| 21 | + |
| 22 | +logger = logging.get_logger(__name__) |
| 23 | + |
| 24 | +INTERNLM2_PRETRAINED_CONFIG_ARCHIVE_MAP = {} |
| 25 | + |
| 26 | + |
| 27 | +# Modified from transformers.model.llama.configuration_llama.LlamaConfig |
| 28 | +class InternLM2Config(PretrainedConfig): |
| 29 | + r""" |
| 30 | + This is the configuration class to store the configuration of a [`InternLM2Model`]. It is used to instantiate |
| 31 | + an InternLM2 model according to the specified arguments, defining the model architecture. Instantiating a |
| 32 | + configuration with the defaults will yield a similar configuration to that of the InternLM2-7B. |
| 33 | +
|
| 34 | + Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the |
| 35 | + documentation from [`PretrainedConfig`] for more information. |
| 36 | +
|
| 37 | +
|
| 38 | + Args: |
| 39 | + vocab_size (`int`, *optional*, defaults to 32000): |
| 40 | + Vocabulary size of the InternLM2 model. Defines the number of different tokens that can be represented by the |
| 41 | + `inputs_ids` passed when calling [`InternLM2Model`] |
| 42 | + hidden_size (`int`, *optional*, defaults to 4096): |
| 43 | + Dimension of the hidden representations. |
| 44 | + intermediate_size (`int`, *optional*, defaults to 11008): |
| 45 | + Dimension of the MLP representations. |
| 46 | + num_hidden_layers (`int`, *optional*, defaults to 32): |
| 47 | + Number of hidden layers in the Transformer encoder. |
| 48 | + num_attention_heads (`int`, *optional*, defaults to 32): |
| 49 | + Number of attention heads for each attention layer in the Transformer encoder. |
| 50 | + num_key_value_heads (`int`, *optional*): |
| 51 | + This is the number of key_value heads that should be used to implement Grouped Query Attention. If |
| 52 | + `num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if |
| 53 | + `num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When |
| 54 | + converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed |
| 55 | + by meanpooling all the original heads within that group. For more details checkout [this |
| 56 | + paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to |
| 57 | + `num_attention_heads`. |
| 58 | + hidden_act (`str` or `function`, *optional*, defaults to `"silu"`): |
| 59 | + The non-linear activation function (function or string) in the decoder. |
| 60 | + max_position_embeddings (`int`, *optional*, defaults to 2048): |
| 61 | + The maximum sequence length that this model might ever be used with. Typically set this to something large |
| 62 | + just in case (e.g., 512 or 1024 or 2048). |
| 63 | + initializer_range (`float`, *optional*, defaults to 0.02): |
| 64 | + The standard deviation of the truncated_normal_initializer for initializing all weight matrices. |
| 65 | + rms_norm_eps (`float`, *optional*, defaults to 1e-12): |
| 66 | + The epsilon used by the rms normalization layers. |
| 67 | + use_cache (`bool`, *optional*, defaults to `True`): |
| 68 | + Whether or not the model should return the last key/values attentions (not used by all models). Only |
| 69 | + relevant if `config.is_decoder=True`. |
| 70 | + tie_word_embeddings(`bool`, *optional*, defaults to `False`): |
| 71 | + Whether to tie weight embeddings |
| 72 | + Example: |
| 73 | +
|
| 74 | + """ |
| 75 | + model_type = "internlm2" |
| 76 | + _auto_class = "AutoConfig" |
| 77 | + |
| 78 | + def __init__( # pylint: disable=W0102 |
| 79 | + self, |
| 80 | + vocab_size=103168, |
| 81 | + hidden_size=4096, |
| 82 | + intermediate_size=11008, |
| 83 | + num_hidden_layers=32, |
| 84 | + num_attention_heads=32, |
| 85 | + num_key_value_heads=None, |
| 86 | + hidden_act="silu", |
| 87 | + max_position_embeddings=2048, |
| 88 | + initializer_range=0.02, |
| 89 | + rms_norm_eps=1e-6, |
| 90 | + use_cache=True, |
| 91 | + pad_token_id=0, |
| 92 | + bos_token_id=1, |
| 93 | + eos_token_id=2, |
| 94 | + tie_word_embeddings=False, |
| 95 | + bias=True, |
| 96 | + rope_theta=10000, |
| 97 | + rope_scaling=None, |
| 98 | + attn_implementation="eager", |
| 99 | + **kwargs, |
| 100 | + ): |
| 101 | + self.vocab_size = vocab_size |
| 102 | + self.max_position_embeddings = max_position_embeddings |
| 103 | + self.hidden_size = hidden_size |
| 104 | + self.intermediate_size = intermediate_size |
| 105 | + self.num_hidden_layers = num_hidden_layers |
| 106 | + self.num_attention_heads = num_attention_heads |
| 107 | + self.bias = bias |
| 108 | + |
| 109 | + if num_key_value_heads is None: |
| 110 | + num_key_value_heads = num_attention_heads |
| 111 | + self.num_key_value_heads = num_key_value_heads |
| 112 | + |
| 113 | + self.hidden_act = hidden_act |
| 114 | + self.initializer_range = initializer_range |
| 115 | + self.rms_norm_eps = rms_norm_eps |
| 116 | + self.use_cache = use_cache |
| 117 | + self.rope_theta = rope_theta |
| 118 | + self.rope_scaling = rope_scaling |
| 119 | + self._rope_scaling_validation() |
| 120 | + |
| 121 | + self.attn_implementation = attn_implementation |
| 122 | + if self.attn_implementation is None: |
| 123 | + self.attn_implementation = "eager" |
| 124 | + super().__init__( |
| 125 | + pad_token_id=pad_token_id, |
| 126 | + bos_token_id=bos_token_id, |
| 127 | + eos_token_id=eos_token_id, |
| 128 | + tie_word_embeddings=tie_word_embeddings, |
| 129 | + **kwargs, |
| 130 | + ) |
| 131 | + |
| 132 | + def _rope_scaling_validation(self): |
| 133 | + """ |
| 134 | + Validate the `rope_scaling` configuration. |
| 135 | + """ |
| 136 | + if self.rope_scaling is None: |
| 137 | + return |
| 138 | + |
| 139 | + if not isinstance(self.rope_scaling, dict) or len(self.rope_scaling) != 2: |
| 140 | + raise ValueError( |
| 141 | + "`rope_scaling` must be a dictionary with with two fields, `type` and `factor`, " |
| 142 | + f"got {self.rope_scaling}" |
| 143 | + ) |
| 144 | + rope_scaling_type = self.rope_scaling.get("type", None) |
| 145 | + rope_scaling_factor = self.rope_scaling.get("factor", None) |
| 146 | + if rope_scaling_type is None or rope_scaling_type not in ["linear", "dynamic"]: |
| 147 | + raise ValueError( |
| 148 | + f"`rope_scaling`'s type field must be one of ['linear', 'dynamic'], got {rope_scaling_type}" |
| 149 | + ) |
| 150 | + if rope_scaling_factor is None or not isinstance(rope_scaling_factor, float) or rope_scaling_factor < 1.0: |
| 151 | + raise ValueError(f"`rope_scaling`'s factor field must be a float >= 1, got {rope_scaling_factor}") |
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