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initial commit internlm2-chat-20b model

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config.json ADDED
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+ {
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+ "architectures": [
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+ "InternLM2ForCausalLM"
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+ ],
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+ "auto_map": {
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+ "AutoConfig": "configuration_internlm.InternLMConfig",
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+ "AutoModelForCausalLM": "modeling_internlm2.InternLM2ForCausalLM",
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+ "AutoModel": "modeling_internlm2.InternLM2ForCausalLM"
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+ },
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+ "bias": false,
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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": 6144,
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+ "initializer_range": 0.02,
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+ "intermediate_size": 16384,
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+ "max_position_embeddings": 32768,
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+ "model_type": "internlm",
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+ "num_attention_heads": 48,
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+ "num_hidden_layers": 48,
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+ "num_key_value_heads": 8,
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+ "pad_token_id": 2,
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+ "rms_norm_eps": 1e-05,
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+ "rope_scaling": {
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+ "factor": 1.0,
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+ "type": "dynamic"
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+ },
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+ "rope_theta": 1000000,
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+ "tie_word_embeddings": false,
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+ "torch_dtype": "bfloat16",
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+ "transformers_version": "4.36.2",
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+ "use_cache": true,
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+ "vocab_size": 92544
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+ }
configuration_internlm.py ADDED
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+ # coding=utf-8
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+ # Copyright (c) InternLM. All rights reserved.
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+ #
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+ # This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
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+ # and OPT implementations in this library. It has been modified from its
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+ # original forms to accommodate minor architectural differences compared
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+ # to GPT-NeoX and OPT used by the Meta AI team that trained the model.
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+ #
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+ # Licensed under the Apache License, Version 2.0 (the "License");
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+ # you may not use this file except in compliance with the License.
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+ # You may obtain a copy of the License at
12
+ #
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+ # http://www.apache.org/licenses/LICENSE-2.0
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+ #
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+ # Unless required by applicable law or agreed to in writing, software
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+ # distributed under the License is distributed on an "AS IS" BASIS,
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+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ # See the License for the specific language governing permissions and
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+ # limitations under the License.
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+ """ InternLM model configuration"""
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+
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+ from transformers.configuration_utils import PretrainedConfig
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+ from transformers.utils import logging
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+
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+ logger = logging.get_logger(__name__)
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+
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+ INTERNLM_PRETRAINED_CONFIG_ARCHIVE_MAP = {}
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+
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+
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+ class InternLMConfig(PretrainedConfig):
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+ r"""
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+ This is the configuration class to store the configuration of a [`InternLMModel`]. It is used to instantiate
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+ an InternLM model according to the specified arguments, defining the model architecture. Instantiating a
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+ configuration with the defaults will yield a similar configuration to that of the InternLM-7B.
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+
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+ Configuration objects inherit from [`PretrainedConfig`] and can be used to control the model outputs. Read the
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+ documentation from [`PretrainedConfig`] for more information.
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+
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+
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+ Args:
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+ vocab_size (`int`, *optional*, defaults to 32000):
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+ Vocabulary size of the InternLM model. Defines the number of different tokens that can be represented by the
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+ `inputs_ids` passed when calling [`InternLMModel`]
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+ hidden_size (`int`, *optional*, defaults to 4096):
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+ Dimension of the hidden representations.
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+ intermediate_size (`int`, *optional*, defaults to 11008):
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+ Dimension of the MLP representations.
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+ num_hidden_layers (`int`, *optional*, defaults to 32):
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+ Number of hidden layers in the Transformer encoder.
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+ num_attention_heads (`int`, *optional*, defaults to 32):
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+ Number of attention heads for each attention layer in the Transformer encoder.
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+ num_key_value_heads (`int`, *optional*):
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+ This is the number of key_value heads that should be used to implement Grouped Query Attention. If
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+ `num_key_value_heads=num_attention_heads`, the model will use Multi Head Attention (MHA), if
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+ `num_key_value_heads=1 the model will use Multi Query Attention (MQA) otherwise GQA is used. When
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+ converting a multi-head checkpoint to a GQA checkpoint, each group key and value head should be constructed
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+ by meanpooling all the original heads within that group. For more details checkout [this
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+ paper](https://arxiv.org/pdf/2305.13245.pdf). If it is not specified, will default to
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+ `num_attention_heads`.
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+ hidden_act (`str` or `function`, *optional*, defaults to `"silu"`):
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+ The non-linear activation function (function or string) in the decoder.
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+ max_position_embeddings (`int`, *optional*, defaults to 2048):
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+ The maximum sequence length that this model might ever be used with. Typically set this to something large
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+ just in case (e.g., 512 or 1024 or 2048).
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+ initializer_range (`float`, *optional*, defaults to 0.02):
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+ The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
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+ rms_norm_eps (`float`, *optional*, defaults to 1e-12):
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+ The epsilon used by the rms normalization layers.
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+ use_cache (`bool`, *optional*, defaults to `True`):
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+ Whether or not the model should return the last key/values attentions (not used by all models). Only
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+ relevant if `config.is_decoder=True`.
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+ tie_word_embeddings(`bool`, *optional*, defaults to `False`):
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+ Whether to tie weight embeddings
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+ Example:
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+
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+ ```python
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+ >>> from transformers import InternLMModel, InternLMConfig
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+
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+ >>> # Initializing a InternLM internlm-7b style configuration
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+ >>> configuration = InternLMConfig()
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+
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+ >>> # Initializing a model from the internlm-7b style configuration
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+ >>> model = InternLMModel(configuration)
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+
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+ >>> # Accessing the model configuration
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+ >>> configuration = model.config
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+ ```"""
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+ model_type = "internlm"
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+ _auto_class = "AutoConfig"
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+
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+ def __init__( # pylint: disable=W0102
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+ self,
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+ vocab_size=103168,
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+ hidden_size=4096,
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+ intermediate_size=11008,
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+ num_hidden_layers=32,
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+ num_attention_heads=32,
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+ num_key_value_heads=None,
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+ hidden_act="silu",
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+ max_position_embeddings=2048,
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+ initializer_range=0.02,
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+ rms_norm_eps=1e-6,
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+ use_cache=True,
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+ pad_token_id=0,
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+ bos_token_id=1,
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+ eos_token_id=2,
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+ tie_word_embeddings=False,
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+ bias=True,
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+ rope_theta=10000,
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+ rope_scaling=None,
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+ **kwargs,
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+ ):
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+ self.vocab_size = vocab_size
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+ self.max_position_embeddings = max_position_embeddings
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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.bias = bias
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+
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+ if num_key_value_heads is None:
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+ num_key_value_heads = num_attention_heads
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+ self.num_key_value_heads = num_key_value_heads
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+
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+ self.hidden_act = hidden_act
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+ self.initializer_range = initializer_range
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+ self.rms_norm_eps = rms_norm_eps
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+ self.use_cache = use_cache
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+ self.rope_theta = rope_theta
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+ self.rope_scaling = rope_scaling
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+ self._rope_scaling_validation()
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+ super().__init__(
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+ pad_token_id=pad_token_id,
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+ bos_token_id=bos_token_id,
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+ eos_token_id=eos_token_id,
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+ tie_word_embeddings=tie_word_embeddings,
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+ **kwargs,
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+ )
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+
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+ def _rope_scaling_validation(self):
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+ """
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+ Validate the `rope_scaling` configuration.
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+ """
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+ if self.rope_scaling is None:
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+ return
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+
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+ if not isinstance(self.rope_scaling, dict) or len(self.rope_scaling) != 2:
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+ raise ValueError(
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+ "`rope_scaling` must be a dictionary with with two fields, `type` and `factor`, "
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+ f"got {self.rope_scaling}"
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+ )
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+ rope_scaling_type = self.rope_scaling.get("type", None)
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+ rope_scaling_factor = self.rope_scaling.get("factor", None)
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+ if rope_scaling_type is None or rope_scaling_type not in ["linear", "dynamic"]:
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+ raise ValueError(
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+ f"`rope_scaling`'s type field must be one of ['linear', 'dynamic'], got {rope_scaling_type}"
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+ )
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+ if rope_scaling_factor is None or not isinstance(rope_scaling_factor, float) or rope_scaling_factor < 1.0:
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+ raise ValueError(f"`rope_scaling`'s factor field must be a float >= 1, got {rope_scaling_factor}")
generation_config.json ADDED
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+ "eos_token_id": 2,
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+ "pad_token_id": 2,
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+ "transformers_version": "4.36.2"
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+ }
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+ "model.layers.8.feed_forward.w2.weight": "model-00001-of-00004.safetensors",
333
+ "model.layers.8.feed_forward.w3.weight": "model-00001-of-00004.safetensors",
334
+ "model.layers.8.ffn_norm.weight": "model-00001-of-00004.safetensors",
335
+ "model.layers.9.attention.wo.weight": "model-00001-of-00004.safetensors",
336
+ "model.layers.9.attention.wqkv.weight": "model-00001-of-00004.safetensors",
337
+ "model.layers.9.attention_norm.weight": "model-00001-of-00004.safetensors",
338
+ "model.layers.9.feed_forward.w1.weight": "model-00001-of-00004.safetensors",
339
+ "model.layers.9.feed_forward.w2.weight": "model-00001-of-00004.safetensors",
340
+ "model.layers.9.feed_forward.w3.weight": "model-00001-of-00004.safetensors",
341
+ "model.layers.9.ffn_norm.weight": "model-00001-of-00004.safetensors",
342
+ "model.norm.weight": "model-00004-of-00004.safetensors",
343
+ "model.tok_embeddings.weight": "model-00001-of-00004.safetensors",
344
+ "output.weight": "model-00004-of-00004.safetensors"
345
+ }
346
+ }
modeling_internlm2.py ADDED
@@ -0,0 +1,1271 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ # coding=utf-8
2
+ # # Copyright (c) InternLM. 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 InternLM2 model."""
21
+ import math
22
+ import queue
23
+ import threading
24
+ import warnings
25
+ from typing import List, Optional, Tuple, Union
26
+
27
+ import torch
28
+ import torch.utils.checkpoint
29
+ from einops import rearrange
30
+ from torch import nn
31
+ from torch.nn import BCEWithLogitsLoss, CrossEntropyLoss, MSELoss
32
+ from transformers.activations import ACT2FN
33
+ from transformers.modeling_outputs import (
34
+ BaseModelOutputWithPast,
35
+ CausalLMOutputWithPast,
36
+ SequenceClassifierOutputWithPast,
37
+ )
38
+ from transformers.modeling_utils import PreTrainedModel
39
+ from transformers.utils import (
40
+ add_start_docstrings,
41
+ add_start_docstrings_to_model_forward,
42
+ logging,
43
+ replace_return_docstrings,
44
+ )
45
+
46
+ try:
47
+ from transformers.generation.streamers import BaseStreamer
48
+ except: # noqa # pylint: disable=bare-except
49
+ BaseStreamer = None
50
+
51
+ from .configuration_internlm import InternLMConfig as InternLM2Config
52
+
53
+ logger = logging.get_logger(__name__)
54
+
55
+ _CONFIG_FOR_DOC = "InternLM2Config"
56
+
57
+
58
+ # Copied from transformers.models.bart.modeling_bart._make_causal_mask
59
+ def _make_causal_mask(
60
+ input_ids_shape: torch.Size, dtype: torch.dtype, device: torch.device, past_key_values_length: int = 0
61
+ ):
62
+ """
63
+ Make causal mask used for bi-directional self-attention.
64
+ """
65
+ bsz, tgt_len = input_ids_shape
66
+ mask = torch.full((tgt_len, tgt_len), torch.tensor(torch.finfo(dtype).min, device=device), device=device)
67
+ mask_cond = torch.arange(mask.size(-1), device=device)
68
+ mask.masked_fill_(mask_cond < (mask_cond + 1).view(mask.size(-1), 1), 0)
69
+ mask = mask.to(dtype)
70
+
71
+ if past_key_values_length > 0:
72
+ mask = torch.cat([torch.zeros(tgt_len, past_key_values_length, dtype=dtype, device=device), mask], dim=-1)
73
+ return mask[None, None, :, :].expand(bsz, 1, tgt_len, tgt_len + past_key_values_length)
74
+
75
+
76
+ # Copied from transformers.models.bart.modeling_bart._expand_mask
77
+ def _expand_mask(mask: torch.Tensor, dtype: torch.dtype, tgt_len: Optional[int] = None):
78
+ """
79
+ Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
80
+ """
81
+ bsz, src_len = mask.size()
82
+ tgt_len = tgt_len if tgt_len is not None else src_len
83
+
84
+ expanded_mask = mask[:, None, None, :].expand(bsz, 1, tgt_len, src_len).to(dtype)
85
+
86
+ inverted_mask = 1.0 - expanded_mask
87
+
88
+ return inverted_mask.masked_fill(inverted_mask.to(torch.bool), torch.finfo(dtype).min)
89
+
90
+
91
+ class InternLM2RMSNorm(nn.Module):
92
+ def __init__(self, hidden_size, eps=1e-6):
93
+ """
94
+ InternLM2RMSNorm is equivalent to T5LayerNorm
95
+ """
96
+ super().__init__()
97
+ self.weight = nn.Parameter(torch.ones(hidden_size))
98
+ self.variance_epsilon = eps
99
+
100
+ def forward(self, hidden_states):
101
+ input_dtype = hidden_states.dtype
102
+ hidden_states = hidden_states.to(torch.float32)
103
+ variance = hidden_states.pow(2).mean(-1, keepdim=True)
104
+ hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
105
+ return self.weight * hidden_states.to(input_dtype)
106
+
107
+
108
+ class InternLM2RotaryEmbedding(nn.Module):
109
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
110
+ super().__init__()
111
+
112
+ self.dim = dim
113
+ self.max_position_embeddings = max_position_embeddings
114
+ self.base = base
115
+ inv_freq = 1.0 / (self.base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
116
+ self.register_buffer("inv_freq", inv_freq, persistent=False)
117
+
118
+ # Build here to make `torch.jit.trace` work.
119
+ self._set_cos_sin_cache(
120
+ seq_len=max_position_embeddings, device=self.inv_freq.device, dtype=torch.get_default_dtype()
121
+ )
122
+
123
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
124
+ self.max_seq_len_cached = seq_len
125
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
126
+
127
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
128
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
129
+ emb = torch.cat((freqs, freqs), dim=-1)
130
+ self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
131
+ self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
132
+
133
+ def forward(self, x, seq_len=None):
134
+ # x: [bs, num_attention_heads, seq_len, head_size]
135
+ if seq_len > self.max_seq_len_cached:
136
+ self._set_cos_sin_cache(seq_len=seq_len, device=x.device, dtype=x.dtype)
137
+
138
+ return (
139
+ self.cos_cached[:seq_len].to(dtype=x.dtype),
140
+ self.sin_cached[:seq_len].to(dtype=x.dtype),
141
+ )
142
+
143
+
144
+ class InternLM2LinearScalingRotaryEmbedding(InternLM2RotaryEmbedding):
145
+ """InternLM2RotaryEmbedding extended with linear scaling. Credits to the Reddit user /u/kaiokendev"""
146
+
147
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
148
+ self.scaling_factor = scaling_factor
149
+ super().__init__(dim, max_position_embeddings, base, device)
150
+
151
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
152
+ self.max_seq_len_cached = seq_len
153
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
154
+ t = t / self.scaling_factor
155
+
156
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
157
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
158
+ emb = torch.cat((freqs, freqs), dim=-1)
159
+ self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
160
+ self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
161
+
162
+
163
+ class InternLM2DynamicNTKScalingRotaryEmbedding(InternLM2RotaryEmbedding):
164
+ """InternLM2RotaryEmbedding extended with Dynamic NTK scaling.
165
+ Credits to the Reddit users /u/bloc97 and /u/emozilla.
166
+ """
167
+
168
+ def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None, scaling_factor=1.0):
169
+ self.scaling_factor = scaling_factor
170
+ super().__init__(dim, max_position_embeddings, base, device)
171
+
172
+ def _set_cos_sin_cache(self, seq_len, device, dtype):
173
+ self.max_seq_len_cached = seq_len
174
+
175
+ if seq_len > self.max_position_embeddings:
176
+ base = self.base * (
177
+ (self.scaling_factor * seq_len / self.max_position_embeddings) - (self.scaling_factor - 1)
178
+ ) ** (self.dim / (self.dim - 2))
179
+ inv_freq = 1.0 / (base ** (torch.arange(0, self.dim, 2).float().to(device) / self.dim))
180
+ self.register_buffer("inv_freq", inv_freq, persistent=False)
181
+
182
+ t = torch.arange(self.max_seq_len_cached, device=device, dtype=self.inv_freq.dtype)
183
+
184
+ freqs = torch.einsum("i,j->ij", t, self.inv_freq)
185
+ # Different from paper, but it uses a different permutation in order to obtain the same calculation
186
+ emb = torch.cat((freqs, freqs), dim=-1)
187
+ self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
188
+ self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
189
+
190
+
191
+ def rotate_half(x):
192
+ """Rotates half the hidden dims of the input."""
193
+ x1 = x[..., : x.shape[-1] // 2]
194
+ x2 = x[..., x.shape[-1] // 2 :]
195
+ return torch.cat((-x2, x1), dim=-1)
196
+
197
+
198
+ def apply_rotary_pos_emb(q, k, cos, sin, position_ids):
199
+ # The first two dimensions of cos and sin are always 1, so we can `squeeze` them.
200
+ cos = cos.squeeze(1).squeeze(0) # [seq_len, dim]
201
+ sin = sin.squeeze(1).squeeze(0) # [seq_len, dim]
202
+ cos = cos.unsqueeze(0).unsqueeze(0).expand(len(position_ids), -1, -1, -1)
203
+ sin = sin.unsqueeze(0).unsqueeze(0).expand(len(position_ids), -1, -1, -1)
204
+ if q.size(2) == 1:
205
+ q_embed = (q * cos[:, :, -1, :]) + (rotate_half(q) * sin[:, :, -1, :])
206
+ else:
207
+ q_embed = (q * cos) + (rotate_half(q) * sin)
208
+
209
+ if k.size(2) == 1:
210
+ k_embed = (k * cos[:, :, -1, :]) + (rotate_half(k) * sin[:, :, -1, :])
211
+ else:
212
+ k_embed = (k * cos) + (rotate_half(k) * sin)
213
+
214
+ return q_embed, k_embed
215
+
216
+
217
+ class InternLM2MLP(nn.Module):
218
+ def __init__(self, config):
219
+ super().__init__()
220
+ self.config = config
221
+ self.hidden_size = config.hidden_size
222
+ self.intermediate_size = config.intermediate_size
223
+ self.w1 = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
224
+ self.w3 = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
225
+ self.w2 = nn.Linear(self.intermediate_size, self.hidden_size, bias=False)
226
+ self.act_fn = ACT2FN[config.hidden_act]
227
+
228
+ def forward(self, x):
229
+ down_proj = self.w2(self.act_fn(self.w1(x)) * self.w3(x))
230
+
231
+ return down_proj
232
+
233
+
234
+ def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
235
+ """
236
+ This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
237
+ num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
238
+ """
239
+ batch, num_key_value_heads, slen, head_dim = hidden_states.shape
240
+ if n_rep == 1:
241
+ return hidden_states
242
+ hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
243
+ return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
244
+
245
+
246
+ class InternLM2Attention(nn.Module):
247
+ """Multi-headed attention from 'Attention Is All You Need' paper"""
248
+
249
+ def __init__(self, config: InternLM2Config):
250
+ super().__init__()
251
+ self.config = config
252
+ self.hidden_size = config.hidden_size
253
+ self.num_heads = config.num_attention_heads
254
+ self.head_dim = self.hidden_size // self.num_heads
255
+ self.num_key_value_heads = config.num_key_value_heads
256
+ self.num_key_value_groups = self.num_heads // self.num_key_value_heads
257
+ self.max_position_embeddings = config.max_position_embeddings
258
+ self.is_causal = True
259
+
260
+ if (self.head_dim * self.num_heads) != self.hidden_size:
261
+ raise ValueError(
262
+ f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
263
+ f" and `num_heads`: {self.num_heads})."
264
+ )
265
+
266
+ self.wqkv = nn.Linear(
267
+ self.hidden_size,
268
+ (self.num_heads + 2 * self.num_key_value_heads) * self.head_dim,
269
+ bias=config.bias,
270
+ )
271
+
272
+ self.wo = nn.Linear(self.num_heads * self.head_dim, self.hidden_size, bias=config.bias)
273
+ self._init_rope()
274
+
275
+ def _init_rope(self):
276
+ if self.config.rope_scaling is None:
277
+ self.rotary_emb = InternLM2RotaryEmbedding(
278
+ self.head_dim,
279
+ max_position_embeddings=self.max_position_embeddings,
280
+ base=self.config.rope_theta,
281
+ )
282
+ else:
283
+ scaling_type = self.config.rope_scaling["type"]
284
+ scaling_factor = self.config.rope_scaling["factor"]
285
+ if scaling_type == "dynamic":
286
+ self.rotary_emb = InternLM2DynamicNTKScalingRotaryEmbedding(
287
+ self.head_dim,
288
+ max_position_embeddings=self.max_position_embeddings,
289
+ base=self.config.rope_theta,
290
+ scaling_factor=scaling_factor
291
+ )
292
+ else:
293
+ raise ValueError("Currently we only support rotary embedding's type being 'dynamic'.")
294
+ return self.rotary_emb
295
+
296
+ def _shape(self, tensor: torch.Tensor, seq_len: int, bsz: int):
297
+ return tensor.view(bsz, seq_len, self.num_heads, self.head_dim).transpose(1, 2).contiguous()
298
+
299
+ def forward(
300
+ self,
301
+ hidden_states: torch.Tensor,
302
+ attention_mask: Optional[torch.Tensor] = None,
303
+ position_ids: Optional[torch.LongTensor] = None,
304
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
305
+ output_attentions: bool = False,
306
+ use_cache: bool = False,
307
+ **kwargs,
308
+ ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
309
+ if "padding_mask" in kwargs:
310
+ warnings.warn(
311
+ "Passing `padding_mask` is deprecated and will be removed in v4.37. "
312
+ "Please make sure use `attention_mask` instead.`"
313
+ )
314
+
315
+ bsz, q_len, _ = hidden_states.size()
316
+
317
+ qkv_states = self.wqkv(hidden_states)
318
+
319
+ qkv_states = rearrange(
320
+ qkv_states,
321
+ "b q (h gs d) -> b q h gs d",
322
+ gs=2 + self.num_key_value_groups,
323
+ d=self.head_dim,
324
+ )
325
+
326
+ query_states = qkv_states[..., : self.num_key_value_groups, :]
327
+ query_states = rearrange(query_states, "b q h gs d -> b q (h gs) d")
328
+ key_states = qkv_states[..., -2, :]
329
+ value_states = qkv_states[..., -1, :]
330
+
331
+ query_states = query_states.transpose(1, 2)
332
+ key_states = key_states.transpose(1, 2)
333
+ value_states = value_states.transpose(1, 2)
334
+
335
+ kv_seq_len = key_states.shape[-2]
336
+ if past_key_value is not None:
337
+ kv_seq_len += past_key_value[0].shape[-2]
338
+ cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
339
+ query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
340
+
341
+ if past_key_value is not None:
342
+ # reuse k, v, self_attention
343
+ key_states = torch.cat([past_key_value[0], key_states], dim=2)
344
+ value_states = torch.cat([past_key_value[1], value_states], dim=2)
345
+
346
+ past_key_value = (key_states, value_states) if use_cache else None
347
+
348
+ key_states = repeat_kv(key_states, self.num_key_value_groups)
349
+ value_states = repeat_kv(value_states, self.num_key_value_groups)
350
+
351
+ attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
352
+
353
+ if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
354
+ raise ValueError(
355
+ f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
356
+ f" {attn_weights.size()}"
357
+ )
358
+
359
+ if attention_mask is not None:
360
+ if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
361
+ raise ValueError(
362
+ f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
363
+ )
364
+ attn_weights = attn_weights + attention_mask
365
+
366
+ # upcast attention to fp32
367
+ attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
368
+ attn_output = torch.matmul(attn_weights, value_states)
369
+
370
+ if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
371
+ raise ValueError(
372
+ f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is"
373
+ f" {attn_output.size()}"
374
+ )
375
+
376
+ attn_output = attn_output.transpose(1, 2).contiguous()
377
+ attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
378
+
379
+ attn_output = self.wo(attn_output)
380
+
381
+ if not output_attentions:
382
+ attn_weights = None
383
+
384
+ return attn_output, attn_weights, past_key_value
385
+
386
+
387
+ class InternLM2FlashAttention2(InternLM2Attention):
388
+ """
389
+ InternLM2 flash attention module. This module inherits from `InternLM2Attention` as the weights of the module stays
390
+ untouched. The only required change would be on the forward pass where it needs to correctly call the public API of
391
+ flash attention and deal with padding tokens in case the input contains any of them.
392
+ """
393
+
394
+ def forward(
395
+ self,
396
+ hidden_states: torch.Tensor,
397
+ attention_mask: Optional[torch.LongTensor] = None,
398
+ position_ids: Optional[torch.LongTensor] = None,
399
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
400
+ output_attentions: bool = False,
401
+ use_cache: bool = False,
402
+ **kwargs,
403
+ ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
404
+ # InternLM2FlashAttention2 attention does not support output_attentions
405
+ if "padding_mask" in kwargs:
406
+ warnings.warn(
407
+ "Passing `padding_mask` is deprecated and will be removed in v4.37. "
408
+ "Please make sure use `attention_mask` instead.`"
409
+ )
410
+
411
+ # overwrite attention_mask with padding_mask
412
+ attention_mask = kwargs.pop("padding_mask")
413
+
414
+ output_attentions = False
415
+
416
+ bsz, q_len, _ = hidden_states.size()
417
+
418
+ qkv_states = self.wqkv(hidden_states)
419
+
420
+ qkv_states = rearrange(
421
+ qkv_states,
422
+ "b q (h gs d) -> b q h gs d",
423
+ gs=self.num_heads + 2 * self.num_key_value_heads,
424
+ d=self.head_dim,
425
+ q=q_len,
426
+ )
427
+
428
+ query_states = qkv_states[..., : self.num_key_value_groups, :]
429
+ query_states = rearrange(query_states, "b q h gs d -> b q (h gs) d")
430
+ key_states = qkv_states[..., -2, :]
431
+ value_states = qkv_states[..., -1, :]
432
+
433
+ kv_seq_len = key_states.shape[-2]
434
+ if past_key_value is not None:
435
+ kv_seq_len += past_key_value[0].shape[-2]
436
+
437
+ cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
438
+
439
+ query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
440
+
441
+ if past_key_value is not None:
442
+ # reuse k, v, self_attention
443
+ key_states = torch.cat([past_key_value[0], key_states], dim=2)
444
+ value_states = torch.cat([past_key_value[1], value_states], dim=2)
445
+
446
+ past_key_value = (key_states, value_states) if use_cache else None
447
+
448
+ query_states = query_states.transpose(1, 2)
449
+ key_states = key_states.transpose(1, 2)
450
+ value_states = value_states.transpose(1, 2)
451
+
452
+ dropout_rate = 0.0 if not self.training else self.attention_dropout
453
+
454
+ # In PEFT, usually we cast the layer norms in float32 for training stability reasons
455
+ # therefore the input hidden states gets silently casted in float32. Hence, we need
456
+ # cast them back in the correct dtype just to be sure everything works as expected.
457
+ # This might slowdown training & inference so it is recommended to not cast the LayerNorms
458
+ # in fp32. (InternLM2RMSNorm handles it correctly)
459
+
460
+ input_dtype = query_states.dtype
461
+ if input_dtype == torch.float32:
462
+ # Handle the case where the model is quantized
463
+ if hasattr(self.config, "_pre_quantization_dtype"):
464
+ target_dtype = self.config._pre_quantization_dtype
465
+ else:
466
+ target_dtype = self.q_proj.weight.dtype
467
+
468
+ logger.warning_once(
469
+ f"The input hidden states seems to be silently casted in float32, this might be related to"
470
+ f" the fact you have upcasted embedding or layer norm layers in float32. We will cast back "
471
+ f"the input in {target_dtype}."
472
+ )
473
+
474
+ query_states = query_states.to(target_dtype)
475
+ key_states = key_states.to(target_dtype)
476
+ value_states = value_states.to(target_dtype)
477
+
478
+ attn_output = self._flash_attention_forward(
479
+ query_states, key_states, value_states, attention_mask, q_len, dropout=dropout_rate
480
+ )
481
+
482
+ attn_output = attn_output.reshape(bsz, q_len, self.hidden_size).contiguous()
483
+ attn_output = self.wo(attn_output)
484
+
485
+ if not output_attentions:
486
+ attn_weights = None
487
+
488
+ return attn_output, attn_weights, past_key_value
489
+
490
+
491
+ class InternLM2DecoderLayer(nn.Module):
492
+ def __init__(self, config: InternLM2Config):
493
+ super().__init__()
494
+ self.hidden_size = config.hidden_size
495
+ self.attention = (
496
+ InternLM2Attention(config=config)
497
+ if not getattr(config, "_flash_attn_2_enabled", False)
498
+ else InternLM2FlashAttention2(config=config)
499
+ )
500
+ self.feed_forward = InternLM2MLP(config)
501
+ self.attention_norm = InternLM2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
502
+ self.ffn_norm = InternLM2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
503
+
504
+ def forward(
505
+ self,
506
+ hidden_states: torch.Tensor,
507
+ attention_mask: Optional[torch.Tensor] = None,
508
+ position_ids: Optional[torch.LongTensor] = None,
509
+ past_key_value: Optional[Tuple[torch.Tensor]] = None,
510
+ output_attentions: Optional[bool] = False,
511
+ use_cache: Optional[bool] = False,
512
+ **kwargs,
513
+ ) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]]:
514
+ """
515
+ Args:
516
+ hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
517
+ attention_mask (`torch.FloatTensor`, *optional*):
518
+ attention mask of size `(batch_size, sequence_length)` if flash attention is used or `(batch_size, 1,
519
+ query_sequence_length, key_sequence_length)` if default attention is used.
520
+ output_attentions (`bool`, *optional*):
521
+ Whether or not to return the attentions tensors of all attention layers. See `attentions` under
522
+ returned tensors for more detail.
523
+ use_cache (`bool`, *optional*):
524
+ If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
525
+ (see `past_key_values`).
526
+ past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
527
+ """
528
+ if "padding_mask" in kwargs:
529
+ warnings.warn(
530
+ "Passing `padding_mask` is deprecated and will be removed in v4.37. "
531
+ "Please make sure use `attention_mask` instead.`"
532
+ )
533
+
534
+ residual = hidden_states
535
+
536
+ hidden_states = self.attention_norm(hidden_states)
537
+
538
+ # Self Attention
539
+ hidden_states, self_attn_weights, present_key_value = self.attention(
540
+ hidden_states=hidden_states,
541
+ attention_mask=attention_mask,
542
+ position_ids=position_ids,
543
+ past_key_value=past_key_value,
544
+ output_attentions=output_attentions,
545
+ use_cache=use_cache,
546
+ **kwargs,
547
+ )
548
+ hidden_states = residual + hidden_states
549
+
550
+ # Fully Connected
551
+ residual = hidden_states
552
+ hidden_states = self.ffn_norm(hidden_states)
553
+ hidden_states = self.feed_forward(hidden_states)
554
+ hidden_states = residual + hidden_states
555
+
556
+ outputs = (hidden_states,)
557
+
558
+ if output_attentions:
559
+ outputs += (self_attn_weights,)
560
+
561
+ if use_cache:
562
+ outputs += (present_key_value,)
563
+
564
+ return outputs
565
+
566
+
567
+ InternLM2_START_DOCSTRING = r"""
568
+ This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
569
+ library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
570
+ etc.)
571
+
572
+ This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
573
+ Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
574
+ and behavior.
575
+
576
+ Parameters:
577
+ config ([`InternLM2Config`]):
578
+ Model configuration class with all the parameters of the model. Initializing with a config file does not
579
+ load the weights associated with the model, only the configuration. Check out the
580
+ [`~PreTrainedModel.from_pretrained`] method to load the model weights.
581
+ """
582
+
583
+
584
+ @add_start_docstrings(
585
+ "The bare InternLM2 Model outputting raw hidden-states without any specific head on top.",
586
+ InternLM2_START_DOCSTRING,
587
+ )
588
+ class InternLM2PreTrainedModel(PreTrainedModel):
589
+ config_class = InternLM2Config
590
+ base_model_prefix = "model"
591
+ supports_gradient_checkpointing = True
592
+ _no_split_modules = ["InternLM2DecoderLayer"]
593
+ _skip_keys_device_placement = "past_key_values"
594
+ _supports_flash_attn_2 = True
595
+
596
+ def _init_weights(self, module):
597
+ std = self.config.initializer_range
598
+ if isinstance(module, nn.Linear):
599
+ module.weight.data.normal_(mean=0.0, std=std)
600
+ if module.bias is not None:
601
+ module.bias.data.zero_()
602
+ elif isinstance(module, nn.Embedding):
603
+ module.weight.data.normal_(mean=0.0, std=std)
604
+ if module.padding_idx is not None:
605
+ module.weight.data[module.padding_idx].zero_()
606
+
607
+
608
+ InternLM2_INPUTS_DOCSTRING = r"""
609
+ Args:
610
+ input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
611
+ Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
612
+ it.
613
+
614
+ Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
615
+ [`PreTrainedTokenizer.__call__`] for details.
616
+
617
+ [What are input IDs?](../glossary#input-ids)
618
+ attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
619
+ Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
620
+
621
+ - 1 for tokens that are **not masked**,
622
+ - 0 for tokens that are **masked**.
623
+
624
+ [What are attention masks?](../glossary#attention-mask)
625
+
626
+ Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
627
+ [`PreTrainedTokenizer.__call__`] for details.
628
+
629
+ If `past_key_values` is used, optionally only the last `input_ids` have to be input (see
630
+ `past_key_values`).
631
+
632
+ If you want to change padding behavior, you should read [`modeling_opt._prepare_decoder_attention_mask`]
633
+ and modify to your needs. See diagram 1 in [the paper](https://arxiv.org/abs/1910.13461) for more
634
+ information on the default strategy.
635
+
636
+ - 1 indicates the head is **not masked**,
637
+ - 0 indicates the head is **masked**.
638
+ position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
639
+ Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
640
+ config.n_positions - 1]`.
641
+
642
+ [What are position IDs?](../glossary#position-ids)
643
+ past_key_values (`tuple(tuple(torch.FloatTensor))`, *optional*, returned when `use_cache=True` is passed or
644
+ when `config.use_cache=True`):
645
+ Tuple of `tuple(torch.FloatTensor)` of length `config.n_layers`, with each tuple having 2 tensors of shape
646
+ `(batch_size, num_heads, sequence_length, embed_size_per_head)`) and 2 additional tensors of shape
647
+ `(batch_size, num_heads, decoder_sequence_length, embed_size_per_head)`.
648
+
649
+ Contains pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
650
+ blocks) that can be used (see `past_key_values` input) to speed up sequential decoding.
651
+
652
+ If `past_key_values` are used, the user can optionally input only the last `input_ids` (those that don't
653
+ have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `input_ids`
654
+ of shape `(batch_size, sequence_length)`.
655
+ inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
656
+ Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
657
+ is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
658
+ model's internal embedding lookup matrix.
659
+ use_cache (`bool`, *optional*):
660
+ If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
661
+ `past_key_values`).
662
+ output_attentions (`bool`, *optional*):
663
+ Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
664
+ tensors for more detail.
665
+ output_hidden_states (`bool`, *optional*):
666
+ Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
667
+ more detail.
668
+ return_dict (`bool`, *optional*):
669
+ Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
670
+ """
671
+
672
+
673
+ @add_start_docstrings(
674
+ "The bare InternLM2 Model outputting raw hidden-states without any specific head on top.",
675
+ InternLM2_START_DOCSTRING,
676
+ )
677
+ class InternLM2Model(InternLM2PreTrainedModel):
678
+ """
679
+ Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`InternLM2DecoderLayer`]
680
+
681
+ Args:
682
+ config: InternLM2Config
683
+ """
684
+
685
+ _auto_class = "AutoModel"
686
+
687
+ def __init__(self, config: InternLM2Config):
688
+ super().__init__(config)
689
+ self.padding_idx = config.pad_token_id
690
+ self.vocab_size = config.vocab_size
691
+
692
+ self.tok_embeddings = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
693
+ self.layers = nn.ModuleList([InternLM2DecoderLayer(config) for _ in range(config.num_hidden_layers)])
694
+ self.norm = InternLM2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
695
+
696
+ self.gradient_checkpointing = False
697
+ # Initialize weights and apply final processing
698
+ self.post_init()
699
+
700
+ def get_input_embeddings(self):
701
+ return self.tok_embeddings
702
+
703
+ def set_input_embeddings(self, value):
704
+ self.tok_embeddings = value
705
+
706
+ # Copied from transformers.models.bart.modeling_bart.BartDecoder._prepare_decoder_attention_mask
707
+ def _prepare_decoder_attention_mask(self, attention_mask, input_shape, inputs_embeds, past_key_values_length):
708
+ # create causal mask
709
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
710
+ combined_attention_mask = None
711
+ if input_shape[-1] > 1:
712
+ combined_attention_mask = _make_causal_mask(
713
+ input_shape,
714
+ inputs_embeds.dtype,
715
+ device=inputs_embeds.device,
716
+ past_key_values_length=past_key_values_length,
717
+ )
718
+
719
+ if attention_mask is not None:
720
+ # [bsz, seq_len] -> [bsz, 1, tgt_seq_len, src_seq_len]
721
+ expanded_attn_mask = _expand_mask(attention_mask, inputs_embeds.dtype, tgt_len=input_shape[-1]).to(
722
+ inputs_embeds.device
723
+ )
724
+ combined_attention_mask = (
725
+ expanded_attn_mask if combined_attention_mask is None else expanded_attn_mask + combined_attention_mask
726
+ )
727
+
728
+ return combined_attention_mask
729
+
730
+ @add_start_docstrings_to_model_forward(InternLM2_INPUTS_DOCSTRING)
731
+ def forward(
732
+ self,
733
+ input_ids: torch.LongTensor = None,
734
+ attention_mask: Optional[torch.Tensor] = None,
735
+ position_ids: Optional[torch.LongTensor] = None,
736
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
737
+ inputs_embeds: Optional[torch.FloatTensor] = None,
738
+ use_cache: Optional[bool] = None,
739
+ output_attentions: Optional[bool] = None,
740
+ output_hidden_states: Optional[bool] = None,
741
+ return_dict: Optional[bool] = None,
742
+ ) -> Union[Tuple, BaseModelOutputWithPast]:
743
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
744
+ output_hidden_states = (
745
+ output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
746
+ )
747
+ use_cache = use_cache if use_cache is not None else self.config.use_cache
748
+
749
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
750
+
751
+ # retrieve input_ids and inputs_embeds
752
+ if input_ids is not None and inputs_embeds is not None:
753
+ raise ValueError("You cannot specify both input_ids and inputs_embeds at the same time")
754
+ elif input_ids is not None:
755
+ batch_size, seq_length = input_ids.shape[:2]
756
+ elif inputs_embeds is not None:
757
+ batch_size, seq_length = inputs_embeds.shape[:2]
758
+ else:
759
+ raise ValueError("You have to specify either input_ids or inputs_embeds")
760
+
761
+ seq_length_with_past = seq_length
762
+ past_key_values_length = 0
763
+ if past_key_values is not None:
764
+ past_key_values_length = past_key_values[0][0].shape[2]
765
+ seq_length_with_past = seq_length_with_past + past_key_values_length
766
+
767
+ if position_ids is None:
768
+ device = input_ids.device if input_ids is not None else inputs_embeds.device
769
+ position_ids = torch.arange(
770
+ past_key_values_length, seq_length + past_key_values_length, dtype=torch.long, device=device
771
+ )
772
+ position_ids = position_ids.unsqueeze(0)
773
+
774
+ if inputs_embeds is None:
775
+ inputs_embeds = self.tok_embeddings(input_ids)
776
+ # embed positions
777
+ if attention_mask is None:
778
+ attention_mask = torch.ones(
779
+ (batch_size, seq_length_with_past), dtype=torch.bool, device=inputs_embeds.device
780
+ )
781
+ attention_mask = self._prepare_decoder_attention_mask(
782
+ attention_mask, (batch_size, seq_length), inputs_embeds, past_key_values_length
783
+ )
784
+
785
+ # embed positions
786
+ hidden_states = inputs_embeds
787
+
788
+ if self.gradient_checkpointing and self.training:
789
+ if use_cache:
790
+ logger.warning_once(
791
+ "`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`..."
792
+ )
793
+ use_cache = False
794
+
795
+ # decoder layers
796
+ all_hidden_states = () if output_hidden_states else None
797
+ all_self_attns = () if output_attentions else None
798
+ next_decoder_cache = () if use_cache else None
799
+
800
+ for idx, decoder_layer in enumerate(self.layers):
801
+ if output_hidden_states:
802
+ all_hidden_states += (hidden_states,)
803
+
804
+ past_key_value = past_key_values[idx] if past_key_values is not None else None
805
+
806
+ if self.gradient_checkpointing and self.training:
807
+
808
+ def create_custom_forward(module):
809
+ def custom_forward(*inputs):
810
+ # None for past_key_value
811
+ return module(*inputs, output_attentions, None)
812
+
813
+ return custom_forward
814
+
815
+ layer_outputs = torch.utils.checkpoint.checkpoint(
816
+ create_custom_forward(decoder_layer),
817
+ hidden_states,
818
+ attention_mask,
819
+ position_ids,
820
+ None,
821
+ )
822
+ else:
823
+ layer_outputs = decoder_layer(
824
+ hidden_states,
825
+ attention_mask=attention_mask,
826
+ position_ids=position_ids,
827
+ past_key_value=past_key_value,
828
+ output_attentions=output_attentions,
829
+ use_cache=use_cache,
830
+ )
831
+
832
+ hidden_states = layer_outputs[0]
833
+
834
+ if use_cache:
835
+ next_decoder_cache += (layer_outputs[2 if output_attentions else 1],)
836
+
837
+ if output_attentions:
838
+ all_self_attns += (layer_outputs[1],)
839
+
840
+ hidden_states = self.norm(hidden_states)
841
+
842
+ # add hidden states from the last decoder layer
843
+ if output_hidden_states:
844
+ all_hidden_states += (hidden_states,)
845
+
846
+ next_cache = next_decoder_cache if use_cache else None
847
+ if not return_dict:
848
+ return tuple(v for v in [hidden_states, next_cache, all_hidden_states, all_self_attns] if v is not None)
849
+ return BaseModelOutputWithPast(
850
+ last_hidden_state=hidden_states,
851
+ past_key_values=next_cache,
852
+ hidden_states=all_hidden_states,
853
+ attentions=all_self_attns,
854
+ )
855
+
856
+
857
+ class InternLM2ForCausalLM(InternLM2PreTrainedModel):
858
+ _auto_class = "AutoModelForCausalLM"
859
+
860
+ _tied_weights_keys = ["output.weight"]
861
+
862
+ def __init__(self, config):
863
+ super().__init__(config)
864
+ self.model = InternLM2Model(config)
865
+ self.vocab_size = config.vocab_size
866
+ self.output = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
867
+
868
+ # Initialize weights and apply final processing
869
+ self.post_init()
870
+
871
+ def get_input_embeddings(self):
872
+ return self.model.tok_embeddings
873
+
874
+ def set_input_embeddings(self, value):
875
+ self.model.tok_embeddings = value
876
+
877
+ def get_output_embeddings(self):
878
+ return self.output
879
+
880
+ def set_output_embeddings(self, new_embeddings):
881
+ self.output = new_embeddings
882
+
883
+ def set_decoder(self, decoder):
884
+ self.model = decoder
885
+
886
+ def get_decoder(self):
887
+ return self.model
888
+
889
+ @add_start_docstrings_to_model_forward(InternLM2_INPUTS_DOCSTRING)
890
+ @replace_return_docstrings(output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
891
+ def forward(
892
+ self,
893
+ input_ids: torch.LongTensor = None,
894
+ attention_mask: Optional[torch.Tensor] = None,
895
+ position_ids: Optional[torch.LongTensor] = None,
896
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
897
+ inputs_embeds: Optional[torch.FloatTensor] = None,
898
+ labels: Optional[torch.LongTensor] = None,
899
+ use_cache: Optional[bool] = None,
900
+ output_attentions: Optional[bool] = None,
901
+ output_hidden_states: Optional[bool] = None,
902
+ return_dict: Optional[bool] = None,
903
+ ) -> Union[Tuple, CausalLMOutputWithPast]:
904
+ r"""
905
+ Args:
906
+ labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
907
+ Labels for computing the masked language modeling loss. Indices should either be in `[0, ...,
908
+ config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
909
+ (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`.
910
+
911
+ Returns:
912
+
913
+ Example:
914
+
915
+ ```python
916
+ >>> from transformers import AutoTokenizer, InternLM2ForCausalLM
917
+
918
+ >>> model = InternLM2ForCausalLM.from_pretrained(PATH_TO_CONVERTED_WEIGHTS)
919
+ >>> tokenizer = AutoTokenizer.from_pretrained(PATH_TO_CONVERTED_TOKENIZER)
920
+
921
+ >>> prompt = "Hey, are you conscious? Can you talk to me?"
922
+ >>> inputs = tokenizer(prompt, return_tensors="pt")
923
+
924
+ >>> # Generate
925
+ >>> generate_ids = model.generate(inputs.input_ids, max_length=30)
926
+ >>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
927
+ "Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
928
+ ```"""
929
+
930
+ output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
931
+ output_hidden_states = (
932
+ output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
933
+ )
934
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
935
+
936
+ # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
937
+ outputs = self.model(
938
+ input_ids=input_ids,
939
+ attention_mask=attention_mask,
940
+ position_ids=position_ids,
941
+ past_key_values=past_key_values,
942
+ inputs_embeds=inputs_embeds,
943
+ use_cache=use_cache,
944
+ output_attentions=output_attentions,
945
+ output_hidden_states=output_hidden_states,
946
+ return_dict=return_dict,
947
+ )
948
+
949
+ hidden_states = outputs[0]
950
+ logits = self.output(hidden_states)
951
+ logits = logits.float()
952
+
953
+ loss = None
954
+ if labels is not None:
955
+ # Shift so that tokens < n predict n
956
+ shift_logits = logits[..., :-1, :].contiguous()
957
+ shift_labels = labels[..., 1:].contiguous()
958
+ # Flatten the tokens
959
+ loss_fct = CrossEntropyLoss()
960
+ shift_logits = shift_logits.view(-1, self.config.vocab_size)
961
+ shift_labels = shift_labels.view(-1)
962
+ # Enable model parallelism
963
+ shift_labels = shift_labels.to(shift_logits.device)
964
+ loss = loss_fct(shift_logits, shift_labels)
965
+
966
+ if not return_dict:
967
+ output = (logits,) + outputs[1:]
968
+ return (loss,) + output if loss is not None else output
969
+
970
+ return CausalLMOutputWithPast(
971
+ loss=loss,
972
+ logits=logits,
973
+ past_key_values=outputs.past_key_values,
974
+ hidden_states=outputs.hidden_states,
975
+ attentions=outputs.attentions,
976
+ )
977
+
978
+ def prepare_inputs_for_generation(
979
+ self, input_ids, past_key_values=None, attention_mask=None, inputs_embeds=None, **kwargs
980
+ ):
981
+ if past_key_values is not None:
982
+ past_length = past_key_values[0][0].shape[2]
983
+
984
+ # Some generation methods already pass only the last input ID
985
+ if input_ids.shape[1] > past_length:
986
+ remove_prefix_length = past_length
987
+ else:
988
+ # Default to old behavior: keep only final ID
989
+ remove_prefix_length = input_ids.shape[1] - 1
990
+
991
+ input_ids = input_ids[:, remove_prefix_length:]
992
+
993
+ position_ids = kwargs.get("position_ids", None)
994
+ if attention_mask is not None and position_ids is None:
995
+ # create position_ids on the fly for batch generation
996
+ position_ids = attention_mask.long().cumsum(-1) - 1
997
+ position_ids.masked_fill_(attention_mask == 0, 1)
998
+ if past_key_values:
999
+ position_ids = position_ids[:, -input_ids.shape[1] :]
1000
+
1001
+ # if `inputs_embeds` are passed, we only want to use them in the 1st generation step
1002
+ if inputs_embeds is not None and past_key_values is None:
1003
+ model_inputs = {"inputs_embeds": inputs_embeds}
1004
+ else:
1005
+ model_inputs = {"input_ids": input_ids}
1006
+
1007
+ model_inputs.update(
1008
+ {
1009
+ "position_ids": position_ids,
1010
+ "past_key_values": past_key_values,
1011
+ "use_cache": kwargs.get("use_cache"),
1012
+ "attention_mask": attention_mask,
1013
+ }
1014
+ )
1015
+ return model_inputs
1016
+
1017
+ @staticmethod
1018
+ def _reorder_cache(past_key_values, beam_idx):
1019
+ reordered_past = ()
1020
+ for layer_past in past_key_values:
1021
+ reordered_past += (
1022
+ tuple(past_state.index_select(0, beam_idx.to(past_state.device)) for past_state in layer_past),
1023
+ )
1024
+ return reordered_past
1025
+
1026
+ def build_inputs(self, tokenizer, query: str, history: List[Tuple[str, str]] = [], meta_instruction=""):
1027
+ prompt = ""
1028
+ if meta_instruction:
1029
+ prompt += f"""<s>[UNUSED_TOKEN_146]system\n{meta_instruction}[UNUSED_TOKEN_145]\n"""
1030
+ else:
1031
+ prompt += "<s>"
1032
+ for record in history:
1033
+ prompt += f"""[UNUSED_TOKEN_146]user\n{record[0]}[UNUSED_TOKEN_145]\n[UNUSED_TOKEN_146]assistant\n{record[1]}[UNUSED_TOKEN_145]\n"""
1034
+ prompt += f"""[UNUSED_TOKEN_146]user\n{query}[UNUSED_TOKEN_145]\n[UNUSED_TOKEN_146]assistant\n"""
1035
+ print(prompt)
1036
+ return tokenizer([prompt], return_tensors="pt")
1037
+
1038
+ @torch.no_grad()
1039
+ def chat(
1040
+ self,
1041
+ tokenizer,
1042
+ query: str,
1043
+ history: List[Tuple[str, str]] = [],
1044
+ streamer: Optional[BaseStreamer] = None,
1045
+ max_new_tokens: int = 1024,
1046
+ do_sample: bool = True,
1047
+ temperature: float = 0.8,
1048
+ top_p: float = 0.8,
1049
+ meta_instruction: str = "You are an AI assistant whose name is InternLM (书生·浦语).\n"
1050
+ "- InternLM (书生·浦语) is a conversational language model that is developed by Shanghai AI Laboratory (上海人工智能实验室). It is designed to be helpful, honest, and harmless.\n"
1051
+ "- InternLM (书生·浦语) can understand and communicate fluently in the language chosen by the user such as English and 中文.",
1052
+ **kwargs,
1053
+ ):
1054
+ inputs = self.build_inputs(tokenizer, query, history, meta_instruction)
1055
+ inputs = {k: v.to(self.device) for k, v in inputs.items() if torch.is_tensor(v)}
1056
+ outputs = self.generate(
1057
+ **inputs,
1058
+ streamer=streamer,
1059
+ max_new_tokens=max_new_tokens,
1060
+ do_sample=do_sample,
1061
+ temperature=temperature,
1062
+ top_p=top_p,
1063
+ **kwargs,
1064
+ )
1065
+ outputs = outputs[0].cpu().tolist()[len(inputs["input_ids"][0]) :]
1066
+ response = tokenizer.decode(outputs, skip_special_tokens=True)
1067
+ response = response.split("[UNUSED_TOKEN_145]")[0]
1068
+ history = history + [(query, response)]
1069
+ return response, history
1070
+
1071
+ @torch.no_grad()
1072
+ def stream_chat(
1073
+ self,
1074
+ tokenizer,
1075
+ query: str,
1076
+ history: List[Tuple[str, str]] = [],
1077
+ max_new_tokens: int = 1024,
1078
+ do_sample: bool = True,
1079
+ temperature: float = 0.8,
1080
+ top_p: float = 0.8,
1081
+ **kwargs,
1082
+ ):
1083
+ """
1084
+ Return a generator in format: (response, history)
1085
+ Eg.
1086
+ ('你好,有什么可以帮助您的吗', [('你好', '你好,有什么可以帮助您的吗')])
1087
+ ('你好,有什么可以帮助您的吗?', [('你好', '你好,有什么可以帮助您的吗?')])
1088
+ """
1089
+ if BaseStreamer is None:
1090
+ raise ModuleNotFoundError(
1091
+ "The version of `transformers` is too low. Please make sure "
1092
+ "that you have installed `transformers>=4.28.0`."
1093
+ )
1094
+
1095
+ response_queue = queue.Queue(maxsize=20)
1096
+
1097
+ class ChatStreamer(BaseStreamer):
1098
+ def __init__(self, tokenizer) -> None:
1099
+ super().__init__()
1100
+ self.tokenizer = tokenizer
1101
+ self.queue = response_queue
1102
+ self.query = query
1103
+ self.history = history
1104
+ self.response = ""
1105
+ self.received_inputs = False
1106
+ self.queue.put((self.response, history + [(self.query, self.response)]))
1107
+
1108
+ def put(self, value):
1109
+ if len(value.shape) > 1 and value.shape[0] > 1:
1110
+ raise ValueError("ChatStreamer only supports batch size 1")
1111
+ elif len(value.shape) > 1:
1112
+ value = value[0]
1113
+
1114
+ if not self.received_inputs:
1115
+ # The first received value is input_ids, ignore here
1116
+ self.received_inputs = True
1117
+ return
1118
+
1119
+ token = self.tokenizer.decode([value[-1]], skip_special_tokens=True)
1120
+ if token.strip() != "[UNUSED_TOKEN_145]":
1121
+ self.response = self.response + token
1122
+ history = self.history + [(self.query, self.response)]
1123
+ self.queue.put((self.response, history))
1124
+
1125
+ def end(self):
1126
+ self.queue.put(None)
1127
+
1128
+ def stream_producer():
1129
+ return self.chat(
1130
+ tokenizer=tokenizer,
1131
+ query=query,
1132
+ streamer=ChatStreamer(tokenizer=tokenizer),
1133
+ history=history,
1134
+ max_new_tokens=max_new_tokens,
1135
+ do_sample=do_sample,
1136
+ temperature=temperature,
1137
+ top_p=top_p,
1138
+ **kwargs,
1139
+ )
1140
+
1141
+ def consumer():
1142
+ producer = threading.Thread(target=stream_producer)
1143
+ producer.start()
1144
+ while True:
1145
+ res = response_queue.get()
1146
+ if res is None:
1147
+ return
1148
+ yield res
1149
+
1150
+ return consumer()
1151
+
1152
+
1153
+ @add_start_docstrings(
1154
+ """
1155
+ The InternLM2 Model transformer with a sequence classification head on top (linear layer).
1156
+
1157
+ [`InternLM2ForSequenceClassification`] uses the last token in order to do the classification,
1158
+ as other causal models (e.g. GPT-2) do.
1159
+
1160
+ Since it does classification on the last token, it requires to know the position of the last token. If a
1161
+ `pad_token_id` is defined in the configuration, it finds the last token that is not a padding token in each row. If
1162
+ no `pad_token_id` is defined, it simply takes the last value in each row of the batch. Since it cannot guess the
1163
+ padding tokens when `inputs_embeds` are passed instead of `input_ids`, it does the same (take the last value in
1164
+ each row of the batch).
1165
+ """,
1166
+ InternLM2_START_DOCSTRING,
1167
+ )
1168
+ class InternLM2ForSequenceClassification(InternLM2PreTrainedModel):
1169
+ def __init__(self, config):
1170
+ super().__init__(config)
1171
+ self.num_labels = config.num_labels
1172
+ self.model = InternLM2Model(config)
1173
+ self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
1174
+
1175
+ # Initialize weights and apply final processing
1176
+ self.post_init()
1177
+
1178
+ def get_input_embeddings(self):
1179
+ return self.model.tok_embeddings
1180
+
1181
+ def set_input_embeddings(self, value):
1182
+ self.model.tok_embeddings = value
1183
+
1184
+ @add_start_docstrings_to_model_forward(InternLM2_INPUTS_DOCSTRING)
1185
+ def forward(
1186
+ self,
1187
+ input_ids: torch.LongTensor = None,
1188
+ attention_mask: Optional[torch.Tensor] = None,
1189
+ position_ids: Optional[torch.LongTensor] = None,
1190
+ past_key_values: Optional[List[torch.FloatTensor]] = None,
1191
+ inputs_embeds: Optional[torch.FloatTensor] = None,
1192
+ labels: Optional[torch.LongTensor] = None,
1193
+ use_cache: Optional[bool] = None,
1194
+ output_attentions: Optional[bool] = None,
1195
+ output_hidden_states: Optional[bool] = None,
1196
+ return_dict: Optional[bool] = None,
1197
+ ) -> Union[Tuple, SequenceClassifierOutputWithPast]:
1198
+ r"""
1199
+ labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
1200
+ Labels for computing the sequence classification/regression loss. Indices should be in `[0, ...,
1201
+ config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
1202
+ `config.num_labels > 1` a classification loss is computed (Cross-Entropy).
1203
+ """
1204
+ return_dict = return_dict if return_dict is not None else self.config.use_return_dict
1205
+
1206
+ transformer_outputs = self.model(
1207
+ input_ids,
1208
+ attention_mask=attention_mask,
1209
+ position_ids=position_ids,
1210
+ past_key_values=past_key_values,
1211
+ inputs_embeds=inputs_embeds,
1212
+ use_cache=use_cache,
1213
+ output_attentions=output_attentions,
1214
+ output_hidden_states=output_hidden_states,
1215
+ return_dict=return_dict,
1216
+ )
1217
+ hidden_states = transformer_outputs[0]
1218
+ logits = self.score(hidden_states)
1219
+
1220
+ if input_ids is not None:
1221
+ batch_size = input_ids.shape[0]
1222
+ else:
1223
+ batch_size = inputs_embeds.shape[0]
1224
+
1225
+ if self.config.pad_token_id is None and batch_size != 1:
1226
+ raise ValueError("Cannot handle batch sizes > 1 if no padding token is defined.")
1227
+ if self.config.pad_token_id is None:
1228
+ sequence_lengths = -1
1229
+ else:
1230
+ if input_ids is not None:
1231
+ sequence_lengths = (torch.eq(input_ids, self.config.pad_token_id).int().argmax(-1) - 1).to(
1232
+ logits.device
1233
+ )
1234
+ else:
1235
+ sequence_lengths = -1
1236
+
1237
+ pooled_logits = logits[torch.arange(batch_size, device=logits.device), sequence_lengths]
1238
+
1239
+ loss = None
1240
+ if labels is not None:
1241
+ labels = labels.to(logits.device)
1242
+ if self.config.problem_type is None:
1243
+ if self.num_labels == 1:
1244
+ self.config.problem_type = "regression"
1245
+ elif self.num_labels > 1 and (labels.dtype == torch.long or labels.dtype == torch.int):
1246
+ self.config.problem_type = "single_label_classification"
1247
+ else:
1248
+ self.config.problem_type = "multi_label_classification"
1249
+
1250
+ if self.config.problem_type == "regression":
1251
+ loss_fct = MSELoss()
1252
+ if self.num_labels == 1:
1253
+ loss = loss_fct(pooled_logits.squeeze(), labels.squeeze())
1254
+ else:
1255
+ loss = loss_fct(pooled_logits, labels)
1256
+ elif self.config.problem_type == "single_label_classification":
1257
+ loss_fct = CrossEntropyLoss()
1258
+ loss = loss_fct(pooled_logits.view(-1, self.num_labels), labels.view(-1))
1259
+ elif self.config.problem_type == "multi_label_classification":
1260
+ loss_fct = BCEWithLogitsLoss()
1261
+ loss = loss_fct(pooled_logits, labels)
1262
+ if not return_dict:
1263
+ output = (pooled_logits,) + transformer_outputs[1:]
1264
+ return ((loss,) + output) if loss is not None else output
1265
+
1266
+ return SequenceClassifierOutputWithPast(
1267
+ loss=loss,
1268
+ logits=pooled_logits,
1269
+ past_key_values=transformer_outputs.past_key_values,
1270
+ hidden_states=transformer_outputs.hidden_states,
1271
+ attentions=transformer_outputs.
special_tokens_map.json ADDED
@@ -0,0 +1,6 @@
 
 
 
 
 
 
 
1
+ {
2
+ "bos_token": "<s>",
3
+ "eos_token": "</s>",
4
+ "pad_token": "</s>",
5
+ "unk_token": "<unk>"
6
+ }
tokenization_internlm.py ADDED
@@ -0,0 +1,240 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ # coding=utf-8
2
+ # Copyright (c) InternLM. 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
+
21
+ """Tokenization classes for IntermLM."""
22
+ import os
23
+ from shutil import copyfile
24
+ from typing import Any, Dict, List, Optional, Tuple
25
+
26
+ import sentencepiece as spm
27
+ from transformers.tokenization_utils import PreTrainedTokenizer
28
+ from transformers.utils import logging
29
+
30
+ logger = logging.get_logger(__name__)
31
+
32
+ VOCAB_FILES_NAMES = {"vocab_file": "./tokenizer.model"}
33
+
34
+ PRETRAINED_VOCAB_FILES_MAP = {}
35
+
36
+
37
+ class InternLMTokenizer(PreTrainedTokenizer):
38
+ """
39
+ Construct a InternLM tokenizer. Based on byte-level Byte-Pair-Encoding.
40
+
41
+ Args:
42
+ vocab_file (`str`):
43
+ Path to the vocabulary file.
44
+ """
45
+
46
+ vocab_files_names = VOCAB_FILES_NAMES
47
+ pretrained_vocab_files_map = PRETRAINED_VOCAB_FILES_MAP
48
+ model_input_names = ["input_ids", "attention_mask"]
49
+ _auto_class = "AutoTokenizer"
50
+
51
+ def __init__(
52
+ self,
53
+ vocab_file,
54
+ unk_token="<unk>",
55
+ bos_token="<s>",
56
+ eos_token="</s>",
57
+ pad_token="</s>",
58
+ sp_model_kwargs: Optional[Dict[str, Any]] = None,
59
+ add_bos_token=True,
60
+ add_eos_token=False,
61
+ decode_with_prefix_space=False,
62
+ clean_up_tokenization_spaces=False,
63
+ **kwargs,
64
+ ):
65
+ self.sp_model_kwargs = {} if sp_model_kwargs is None else sp_model_kwargs
66
+ self.vocab_file = vocab_file
67
+ self.add_bos_token = add_bos_token
68
+ self.add_eos_token = add_eos_token
69
+ self.decode_with_prefix_space = decode_with_prefix_space
70
+ self.sp_model = spm.SentencePieceProcessor(**self.sp_model_kwargs)
71
+ self.sp_model.Load(vocab_file)
72
+ self._no_prefix_space_tokens = None
73
+ super().__init__(
74
+ bos_token=bos_token,
75
+ eos_token=eos_token,
76
+ unk_token=unk_token,
77
+ pad_token=pad_token,
78
+ clean_up_tokenization_spaces=clean_up_tokenization_spaces,
79
+ **kwargs,
80
+ )
81
+
82
+ """ Initialization"""
83
+
84
+ @property
85
+ def no_prefix_space_tokens(self):
86
+ if self._no_prefix_space_tokens is None:
87
+ vocab = self.convert_ids_to_tokens(list(range(self.vocab_size)))
88
+ self._no_prefix_space_tokens = {i for i, tok in enumerate(vocab) if not tok.startswith("▁")}
89
+ return self._no_prefix_space_tokens
90
+
91
+ @property
92
+ def vocab_size(self):
93
+ """Returns vocab size"""
94
+ return self.sp_model.get_piece_size()
95
+
96
+ @property
97
+ def bos_token_id(self) -> Optional[int]:
98
+ return self.sp_model.bos_id()
99
+
100
+ @property
101
+ def eos_token_id(self) -> Optional[int]:
102
+ return self.sp_model.eos_id()
103
+
104
+ def get_vocab(self):
105
+ """Returns vocab as a dict"""
106
+ vocab = {self.convert_ids_to_tokens(i): i for i in range(self.vocab_size)}
107
+ vocab.update(self.added_tokens_encoder)
108
+ return vocab
109
+
110
+ def _tokenize(self, text):
111
+ """Returns a tokenized string."""
112
+ return self.sp_model.encode(text, out_type=str)
113
+
114
+ def _convert_token_to_id(self, token):
115
+ """Converts a token (str) in an id using the vocab."""
116
+ return self.sp_model.piece_to_id(token)
117
+
118
+ def _convert_id_to_token(self, index):
119
+ """Converts an index (integer) in a token (str) using the vocab."""
120
+ token = self.sp_model.IdToPiece(index)
121
+ return token
122
+
123
+ def _maybe_add_prefix_space(self, tokens, decoded):
124
+ if tokens and tokens[0] not in self.no_prefix_space_tokens:
125
+ return " " + decoded
126
+ else:
127
+ return decoded
128
+
129
+ def convert_tokens_to_string(self, tokens):
130
+ """Converts a sequence of tokens (string) in a single string."""
131
+ current_sub_tokens = []
132
+ out_string = ""
133
+ prev_is_special = False
134
+ for token in tokens:
135
+ # make sure that special tokens are not decoded using sentencepiece model
136
+ if token in self.all_special_tokens:
137
+ if not prev_is_special:
138
+ out_string += " "
139
+ out_string += self.sp_model.decode(current_sub_tokens) + token
140
+ prev_is_special = True
141
+ current_sub_tokens = []
142
+ else:
143
+ current_sub_tokens.append(token)
144
+ prev_is_special = False
145
+ out_string += self.sp_model.decode(current_sub_tokens)
146
+ out_string = self.clean_up_tokenization(out_string)
147
+ out_string = self._maybe_add_prefix_space(tokens=tokens, decoded=out_string)
148
+ return out_string[1:]
149
+
150
+ def save_vocabulary(self, save_directory, filename_prefix: Optional[str] = None) -> Tuple[str]:
151
+ """
152
+ Save the vocabulary and special tokens file to a directory.
153
+
154
+ Args:
155
+ save_directory (`str`):
156
+ The directory in which to save the vocabulary.
157
+
158
+ Returns:
159
+ `Tuple(str)`: Paths to the files saved.
160
+ """
161
+ if not os.path.isdir(save_directory):
162
+ logger.error(f"Vocabulary path ({save_directory}) should be a directory")
163
+ return
164
+ out_vocab_file = os.path.join(
165
+ save_directory, (filename_prefix + "-" if filename_prefix else "") + VOCAB_FILES_NAMES["vocab_file"]
166
+ )
167
+
168
+ if os.path.abspath(self.vocab_file) != os.path.abspath(out_vocab_file) and os.path.isfile(self.vocab_file):
169
+ copyfile(self.vocab_file, out_vocab_file)
170
+ elif not os.path.isfile(self.vocab_file):
171
+ with open(out_vocab_file, "wb") as fi:
172
+ content_spiece_model = self.sp_model.serialized_model_proto()
173
+ fi.write(content_spiece_model)
174
+
175
+ return (out_vocab_file,)
176
+
177
+ def build_inputs_with_special_tokens(self, token_ids_0, token_ids_1=None):
178
+ if self.add_bos_token:
179
+ bos_token_ids = [self.bos_token_id]
180
+ else:
181
+ bos_token_ids = []
182
+
183
+ output = bos_token_ids + token_ids_0
184
+
185
+ if token_ids_1 is not None:
186
+ output = output + token_ids_1
187
+
188
+ if self.add_eos_token:
189
+ output = output + [self.eos_token_id]
190
+
191
+ return output
192
+
193
+ def get_special_tokens_mask(
194
+ self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None, already_has_special_tokens: bool = False
195
+ ) -> List[int]:
196
+ """
197
+ Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding
198
+ special tokens using the tokenizer `prepare_for_model` method.
199
+
200
+ Args:
201
+ token_ids_0 (`List[int]`):
202
+ List of IDs.
203
+ token_ids_1 (`List[int]`, *optional*):
204
+ Optional second list of IDs for sequence pairs.
205
+ already_has_special_tokens (`bool`, *optional*, defaults to `False`):
206
+ Whether or not the token list is already formatted with special tokens for the model.
207
+
208
+ Returns:
209
+ `List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
210
+ """
211
+ if already_has_special_tokens:
212
+ return super().get_special_tokens_mask(
213
+ token_ids_0=token_ids_0, token_ids_1=token_ids_1, already_has_special_tokens=True
214
+ )
215
+
216
+ if token_ids_1 is None:
217
+ return [1] + ([0] * len(token_ids_0)) + [1]
218
+ return [1] + ([0] * len(token_ids_0)) + [1, 1] + ([0] * len(token_ids_1)) + [1]
219
+
220
+ def create_token_type_ids_from_sequences(
221
+ self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
222
+ ) -> List[int]:
223
+ """
224
+ Create a mask from the two sequences passed to be used in a sequence-pair classification task. T5 does not make
225
+ use of token type ids, therefore a list of zeros is returned.
226
+
227
+ Args:
228
+ token_ids_0 (`List[int]`):
229
+ List of IDs.
230
+ token_ids_1 (`List[int]`, *optional*):
231
+ Optional second list of IDs for sequence pairs.
232
+
233
+ Returns:
234
+ `List[int]`: List of zeros.
235
+ """
236
+ eos = [self.eos_token_id]
237
+
238
+ if token_ids_1 is None:
239
+ return len(token_ids_0 + eos) * [0]
240
+ return len(token_ids_0 + eos + token_ids_1 + eos) * [0]
tokenizer.model ADDED
@@ -0,0 +1,3 @@
 
 
 
 
1
+ version https://git-lfs.github.com/spec/v1
2
+ oid sha256:f868398fc4e05ee1e8aeba95ddf18ddcc45b8bce55d5093bead5bbf80429b48b
3
+ size 1477754
tokenizer_config.json ADDED
@@ -0,0 +1,41 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1
+ {
2
+ "added_tokens_decoder": {
3
+ "0": {
4
+ "content": "<unk>",
5
+ "lstrip": false,
6
+ "normalized": false,
7
+ "rstrip": false,
8
+ "single_word": false,
9
+ "special": true
10
+ },
11
+ "1": {
12
+ "content": "<s>",
13
+ "lstrip": false,
14
+ "normalized": false,
15
+ "rstrip": false,
16
+ "single_word": false,
17
+ "special": true
18
+ },
19
+ "2": {
20
+ "content": "</s>",
21
+ "lstrip": false,
22
+ "normalized": false,
23
+ "rstrip": false,
24
+ "single_word": false,
25
+ "special": true
26
+ }
27
+ },
28
+ "auto_map": {
29
+ "AutoTokenizer": [
30
+ "tokenization_internlm.InternLMTokenizer",
31
+ null
32
+ ]
33
+ },
34
+ "bos_token": "<s>",
35
+ "clean_up_tokenization_spaces": false,
36
+ "eos_token": "</s>",
37
+ "model_max_length": 1000000000000000019884624838656,
38
+ "pad_token": "</s>",
39
+ "tokenizer_class": "InternLMTokenizer",
40
+ "unk_token": "<unk>"
41
+ }