init
Browse filesinitial 1
- config.json +41 -0
- configuration_telechat.py +90 -0
- generation_config.json +14 -0
- generation_utils.py +159 -0
- modeling_telechat.py +917 -0
- pytorch_model.bin.index.json +309 -0
- pytorch_model_00001-of-00032.bin +3 -0
- pytorch_model_00002-of-00032.bin +3 -0
- pytorch_model_00003-of-00032.bin +3 -0
- pytorch_model_00004-of-00032.bin +3 -0
- pytorch_model_00005-of-00032.bin +3 -0
config.json
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{
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"apply_residual_connection_post_layernorm": false,
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"architectures": [
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"TelechatForCausalLM"
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],
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"auto_map": {
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"AutoConfig": "configuration_telechat.TelechatConfig",
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"AutoModelForCausalLM": "modeling_telechat.TelechatForCausalLM"
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},
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"attention_dropout": 0.0,
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"attention_softmax_in_fp32": true,
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"bias_dropout_fusion": true,
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"bos_token_id": 1,
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"eos_token_id": 2,
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"hidden_dropout": 0.0,
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"hidden_size": 4096,
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"initializer_range": 0.02,
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"layer_norm_epsilon": 1e-05,
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"masked_softmax_fusion": true,
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"model_type": "telechat",
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"n_head": 32,
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"n_inner": null,
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"n_layer": 30,
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"offset_alibi": 100,
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"pad_token_id": 3,
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"pretraining_tp": 2,
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"seq_length": 8192,
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"skip_bias_add": true,
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"skip_bias_add_qkv": false,
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"slow_but_exact": false,
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"transformers_version": "4.24.0",
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"unk_token_id": 0,
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"use_cache": true,
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"vocab_size": 160256,
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"ffn_hidden_size": 12288,
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"flash_attn":true,
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"training_seqlen":4096,
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"logn":false,
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"embed_layernorm":false
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}
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configuration_telechat.py
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# coding=utf-8
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# Copyright 2022 the Big Science Workshop and HuggingFace Inc. team. All rights reserved.
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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
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#
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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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""" Telechat configuration"""
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from transformers.utils import logging
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from transformers.configuration_utils import PretrainedConfig
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logger = logging.get_logger(__name__)
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class TelechatConfig(PretrainedConfig):
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"""
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Args:
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vocab_size (`int`, *optional*, defaults to 160256): Vocabulary size of the Telechat model.
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hidden_size (`int`, *optional*, defaults to 4096): Dimensionality of the embeddings and hidden states.
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ffn_hidden_size (`int`, *optional*, defaults to 12288): Dimensionality of the feed-forward hidden states.
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n_layer (`int`, *optional*, defaults to 30): Number of hidden layers in the Transformer
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n_head (`int`, *optional*, defaults to 32): Number of attention heads for each attention layer.
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layer_norm_epsilon (`float`, *optional*, defaults to 1e-5): The epsilon to use in the layer normalization layers.
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initializer_range (`float`, *optional*, defaults to 0.02): The standard deviation of the truncated_normal_initializer for initializing all weight matrices.
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apply_residual_connection_post_layernorm (`bool`, *optional*, defaults to `False`): If enabled, use the layer norm of the hidden states as the residual in the transformer blocks
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hidden_dropout (`float`, *optional*, defaults to 0.0): Dropout rate of the dropout function on the bias dropout.
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attention_dropout (`float`, *optional*, defaults to 0.0): Dropout rate applied to the attention probs
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use_cache (`bool`, *optional*, defaults to `True`): Whether or not the model should return the last key/values attentions.
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training_seqlen (`int`, *optional*, defaults to 8192): Sequence length during last finetuning.
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logn (`bool`, *optional*, defaults to `True`): Whether or not to use logN during extrapolation.
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embed_layernorm (`bool`, *optional*, defaults to `True`): Whether or not to use embedding layernorm.
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"""
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model_type = "telechat"
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keys_to_ignore_at_inference = ["past_key_values"]
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attribute_map = {
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"num_hidden_layers": "n_layer",
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"num_attention_heads": "n_head",
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}
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def __init__(
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self,
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vocab_size=160256,
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hidden_size=4096,
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n_layer=30,
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n_head=32,
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layer_norm_epsilon=1e-5,
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initializer_range=0.02,
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use_cache=True,
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bos_token_id=1,
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eos_token_id=2,
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apply_residual_connection_post_layernorm=False,
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hidden_dropout=0.0,
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attention_dropout=0.0,
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ffn_hidden_size=12288,
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training_seqlen = 8192,
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logn = True,
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embed_layernorm = False,
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**kwargs,
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):
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self.vocab_size = vocab_size
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n_embed = kwargs.pop("n_embed", None)
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self.hidden_size = hidden_size if n_embed is None else n_embed
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self.n_layer = n_layer
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self.n_head = n_head
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self.layer_norm_epsilon = layer_norm_epsilon
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self.initializer_range = initializer_range
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self.use_cache = use_cache
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self.apply_residual_connection_post_layernorm = apply_residual_connection_post_layernorm
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self.hidden_dropout = hidden_dropout
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self.attention_dropout = attention_dropout
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self.bos_token_id = bos_token_id
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self.eos_token_id = eos_token_id
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self.logn = logn
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self.ffn_hidden_size = ffn_hidden_size
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self.training_seqlen = training_seqlen
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self.embed_layernorm = embed_layernorm
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super().__init__(bos_token_id=bos_token_id, eos_token_id=eos_token_id, **kwargs)
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generation_config.json
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{
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"max_length": 4096,
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"do_sample": false,
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"use_cache": true,
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"temperature": 0.3,
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"top_k": 5,
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"top_p": 0.85,
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"repetition_penalty": 1.03,
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"pad_token_id": 3,
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"bos_token_id": 160132,
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"eos_token_id": 160133,
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"user_token_id": 160130,
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"bot_token_id": 160131
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}
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generation_utils.py
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from typing import Optional
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from collections import deque
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from queue import Queue
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import copy
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class History:
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def __init__(self, tokenizer, history):
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'''
|
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init from a list of dict
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'''
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# use deque to meet some special situation
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self.input_history = deque()
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self.tokenizer = tokenizer
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if history:
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self._transfer_from_list(history)
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def _transfer_from_list(self, history):
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for message in history:
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content = message.get("content")
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message.update(self.tokenizer(content))
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self.input_history.append(message)
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def append(self, message):
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content = message.get("content")
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message.update(self.tokenizer(content))
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self.input_history.append(message)
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def append_left(self, message):
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content = message.get("content")
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message.update(self.tokenizer(content))
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self.input_history.appendleft(message)
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def pop(self):
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x = self.input_history.pop()
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return x
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def pop_left(self):
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x = self.pop_left()
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return x
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def update(self, content: str):
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x = self.input_history.pop()
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self.append({"role": x["role"], "content": content})
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def __len__(self):
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return self.input_history.__len__()
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def __str__(self):
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return self.input_history.__str__()
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def __copy__(self):
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new_instance = type(self)(self.tokenizer, [])
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new_instance.input_history = copy.copy(self.input_history)
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return new_instance
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def __deepcopy__(self, memodict={}):
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new_instance = type(self)(self.tokenizer, [])
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new_instance.input_history = copy.deepcopy(self.input_history)
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return new_instance
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+
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class TelechatIterTextStreamer:
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"""
|
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With reference to the TextIterStreamers in transformers, we have rewritten this class
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"""
|
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def __init__(
|
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self, tokenizer, history: History = None, skip_prompt: bool = False, timeout: Optional[float] = None,
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**decode_kwargs
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):
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+
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self.tokenizer = tokenizer
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self.history = history
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self.skip_prompt = skip_prompt
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self.timeout = timeout
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self.decode_kwargs = decode_kwargs
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self.text_queue = Queue()
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81 |
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self.token_cache = []
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self.cache_time = 0
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83 |
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self.text_until = ""
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self.stop_signal = None
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self.next_tokens_are_prompt = True
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self.history.append({"role": "bot", "content": self.text_until})
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def put(self, value):
|
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"""
|
91 |
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put printable text into queue
|
92 |
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"""
|
93 |
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if len(value.shape) > 1 and value.shape[0] > 1:
|
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raise ValueError("TextStreamer only supports batch size 1")
|
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elif len(value.shape) > 1:
|
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value = value[0]
|
97 |
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|
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if self.skip_prompt and self.next_tokens_are_prompt:
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self.next_tokens_are_prompt = False
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return
|
101 |
+
|
102 |
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if value[-1] == self.tokenizer.eos_token_id:
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return
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104 |
+
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105 |
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# there may be some smart way to decode.
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self.token_cache.extend(value.tolist())
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text = self.tokenizer.decode(self.token_cache, **self.decode_kwargs)
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108 |
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self.cache_time += 1
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109 |
+
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110 |
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if self._is_printable(text) or self.cache_time >= 6:
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self.text_until += text
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112 |
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self.token_cache = []
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113 |
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self.cache_time = 0
|
114 |
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115 |
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else:
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return
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117 |
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self.on_finalized_text(text)
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119 |
+
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120 |
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def end(self):
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"""Flushes any remaining cache and prints a newline to stdout."""
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122 |
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# Flush the cache, if it exists
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123 |
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text = ""
|
124 |
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if len(self.token_cache) > 0:
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text = self.tokenizer.decode(self.token_cache, **self.decode_kwargs)
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126 |
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self.text_until += text
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127 |
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self.on_finalized_text(text, stream_end=True)
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128 |
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self.clear_cache()
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129 |
+
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130 |
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def clear_cache(self):
|
131 |
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self.cache_time = 0
|
132 |
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self.token_cache = []
|
133 |
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self.text_until = ""
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134 |
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self.history = None
|
135 |
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self.next_tokens_are_prompt = True
|
136 |
+
|
137 |
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def on_finalized_text(self, text: str, stream_end: bool = False):
|
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"""Put the text tuple in the queue."""
|
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self.history.update(self.text_until)
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140 |
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self.text_queue.put((text, self.history), timeout=self.timeout)
|
141 |
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if stream_end:
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self.text_queue.put((self.stop_signal, self.history), timeout=self.timeout)
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143 |
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|
144 |
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@staticmethod
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145 |
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def _is_printable(cp):
|
146 |
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"""Checks whether tokens can be decoded or not"""
|
147 |
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if "�" in cp:
|
148 |
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return False
|
149 |
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return True
|
150 |
+
|
151 |
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def __iter__(self):
|
152 |
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return self
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153 |
+
|
154 |
+
def __next__(self):
|
155 |
+
value_now, history_until = self.text_queue.get(timeout=self.timeout)
|
156 |
+
if value_now == self.stop_signal:
|
157 |
+
raise StopIteration()
|
158 |
+
else:
|
159 |
+
return value_now, history_until
|
modeling_telechat.py
ADDED
@@ -0,0 +1,917 @@
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|
|
|
|
1 |
+
# coding=utf-8
|
2 |
+
# Copyright 2022 HuggingFace Inc. team and BigScience workshop.
|
3 |
+
#
|
4 |
+
# Licensed under the Apache License, Version 2.0 (the "License");
|
5 |
+
# you may not use this file except in compliance with the License.
|
6 |
+
# You may obtain a copy of the License at
|
7 |
+
#
|
8 |
+
# http://www.apache.org/licenses/LICENSE-2.0
|
9 |
+
#
|
10 |
+
# Unless required by applicable law or agreed to in writing, software
|
11 |
+
# distributed under the License is distributed on an "AS IS" BASIS,
|
12 |
+
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
13 |
+
# See the License for the specific language governing permissions and
|
14 |
+
# limitations under the License.
|
15 |
+
|
16 |
+
# Copyright (c) 2023, NVIDIA CORPORATION. All rights reserved.
|
17 |
+
|
18 |
+
# Copyright (c) 2021 EleutherAI
|
19 |
+
# This file is based on code by the authors denoted below and has been modified from its original version.
|
20 |
+
#
|
21 |
+
# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
|
22 |
+
#
|
23 |
+
# Licensed under the Apache License, Version 2.0 (the "License");
|
24 |
+
# you may not use this file except in compliance with the License.
|
25 |
+
# You may obtain a copy of the License at
|
26 |
+
#
|
27 |
+
# http://www.apache.org/licenses/LICENSE-2.0
|
28 |
+
#
|
29 |
+
# Unless required by applicable law or agreed to in writing, software
|
30 |
+
# distributed under the License is distributed on an "AS IS" BASIS,
|
31 |
+
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
32 |
+
# See the License for the specific language governing permissions and
|
33 |
+
# limitations under the License.
|
34 |
+
|
35 |
+
|
36 |
+
"""PyTorch TELECHAT model."""
|
37 |
+
|
38 |
+
import warnings
|
39 |
+
from typing import Optional, Tuple, Union, List, Dict
|
40 |
+
from threading import Thread
|
41 |
+
|
42 |
+
import torch
|
43 |
+
import math
|
44 |
+
import copy
|
45 |
+
from torch import nn
|
46 |
+
import torch.utils.checkpoint
|
47 |
+
from torch.nn import functional as F
|
48 |
+
from torch.nn import BCEWithLogitsLoss, CrossEntropyLoss, LayerNorm, MSELoss
|
49 |
+
from transformers.modeling_outputs import (
|
50 |
+
BaseModelOutputWithPastAndCrossAttentions,
|
51 |
+
CausalLMOutputWithCrossAttentions
|
52 |
+
)
|
53 |
+
from transformers.modeling_utils import PreTrainedModel
|
54 |
+
from transformers.utils import logging
|
55 |
+
from transformers import GenerationConfig
|
56 |
+
|
57 |
+
from .configuration_telechat import TelechatConfig
|
58 |
+
from .generation_utils import History, TelechatIterTextStreamer
|
59 |
+
|
60 |
+
logger = logging.get_logger(__name__)
|
61 |
+
|
62 |
+
_CHECKPOINT_FOR_DOC = "telechat"
|
63 |
+
_CONFIG_FOR_DOC = "TelechatConfig"
|
64 |
+
|
65 |
+
TELECHAT_PRETRAINED_MODEL_ARCHIVE_LIST = []
|
66 |
+
|
67 |
+
try:
|
68 |
+
from einops import rearrange
|
69 |
+
except ImportError:
|
70 |
+
rearrange = None
|
71 |
+
|
72 |
+
use_flash_attn = True
|
73 |
+
try:
|
74 |
+
from flash_attn.flash_attn_interface import flash_attn_unpadded_func
|
75 |
+
except ImportError:
|
76 |
+
try:
|
77 |
+
from flash_attn.flash_attn_interface import flash_attn_varlen_func as flash_attn_unpadded_func
|
78 |
+
except ImportError:
|
79 |
+
flash_attn_unpadded_func = None
|
80 |
+
|
81 |
+
|
82 |
+
class RotaryEmbedding(torch.nn.Module):
|
83 |
+
# Extracted from: https://github.com/EleutherAI/gpt-neox
|
84 |
+
def __init__(self, dim, config, base=10000, precision=torch.half):
|
85 |
+
super().__init__()
|
86 |
+
self.config = config
|
87 |
+
self.dim = dim
|
88 |
+
self.base = base
|
89 |
+
self.inv_freq = 1. / (base ** (torch.arange(0, dim, 2).float().half() / dim)).cuda()
|
90 |
+
self.max_seq_len_cached = None
|
91 |
+
self.cos_cached = None
|
92 |
+
self.sin_cached = None
|
93 |
+
self.precision = precision
|
94 |
+
|
95 |
+
def get_mscale(self, scale=1):
|
96 |
+
if scale <= 1:
|
97 |
+
return 1.0
|
98 |
+
return 0.1 * math.log(scale) + 1.0
|
99 |
+
|
100 |
+
def get_ntk_alpha(self, true_seq_len):
|
101 |
+
context_value = math.log(true_seq_len / 4096, 2) + 1
|
102 |
+
# ntk_alpha = 2 ** context_value - 1
|
103 |
+
ntk_alpha = 2 ** math.ceil(context_value) - 1
|
104 |
+
ntk_alpha = max(ntk_alpha, 1)
|
105 |
+
return ntk_alpha
|
106 |
+
|
107 |
+
def forward(self, x, seq_dim=0, seq_len=None):
|
108 |
+
if seq_len is None:
|
109 |
+
seq_len = x.shape[seq_dim]
|
110 |
+
seq_len = max(seq_len, self.config.training_seqlen)
|
111 |
+
ntk_alpha = self.get_ntk_alpha(seq_len)
|
112 |
+
self.mscale = float(self.get_mscale(seq_len / self.config.training_seqlen))
|
113 |
+
if True:
|
114 |
+
base = self.base * ntk_alpha ** (self.dim / (self.dim - 2))
|
115 |
+
self.inv_freq = 1.0 / (base ** (torch.arange(0, self.dim, 2, device=x.device).float() / self.dim))
|
116 |
+
self.max_seq_len_cached = seq_len
|
117 |
+
t = torch.arange(self.max_seq_len_cached, device=x.device, dtype=self.inv_freq.dtype)
|
118 |
+
freqs = torch.einsum('i,j->ij', t, self.inv_freq)
|
119 |
+
# Different from paper, but it uses a different permutation in order to obtain the same calculation
|
120 |
+
emb = torch.cat((freqs, freqs), dim=-1).to(x.device)
|
121 |
+
if self.precision == torch.bfloat16:
|
122 |
+
emb = emb.float()
|
123 |
+
# [sx, 1 (b * np), hn]
|
124 |
+
self.cos_cached = self.mscale * emb.cos()[:, None, :].half()
|
125 |
+
self.sin_cached = self.mscale * emb.sin()[:, None, :].half()
|
126 |
+
if self.precision == torch.bfloat16:
|
127 |
+
self.cos_cached = self.cos_cached.bfloat16()
|
128 |
+
self.sin_cached = self.sin_cached.bfloat16()
|
129 |
+
return self.cos_cached[:seq_len, ...], self.sin_cached[:seq_len, ...]
|
130 |
+
|
131 |
+
|
132 |
+
# rotary pos emb helpers:
|
133 |
+
def rotate_half(x):
|
134 |
+
x1, x2 = x[..., :x.shape[-1] // 2], x[..., x.shape[-1] // 2:]
|
135 |
+
return torch.cat((-x2, x1), dim=x1.ndim - 1) # dim=-1 triggers a bug in earlier torch versions
|
136 |
+
|
137 |
+
|
138 |
+
def apply_rotary_pos_emb_torch(q, k, cos, sin, offset: int = 0): # jitting fails with bf16
|
139 |
+
cos, sin = cos[offset:q.shape[0] + offset, ...], sin[offset:q.shape[0] + offset, ...]
|
140 |
+
return (q * cos) + (rotate_half(q) * sin), (k * cos) + (rotate_half(k) * sin)
|
141 |
+
|
142 |
+
|
143 |
+
class MixedFusedRMSNorm(nn.Module):
|
144 |
+
# Extracted from https://github.com/huggingface/transformers/blob/main/src/transformers/models/llama/modeling_llama.py
|
145 |
+
def __init__(self, hidden_size, eps=1e-6):
|
146 |
+
super().__init__()
|
147 |
+
self.weight = nn.Parameter(torch.ones(hidden_size))
|
148 |
+
self.variance_epsilon = eps
|
149 |
+
|
150 |
+
def forward(self, hidden_states):
|
151 |
+
input_dtype = hidden_states.dtype
|
152 |
+
hidden_states = hidden_states.to(torch.float32)
|
153 |
+
variance = hidden_states.pow(2).mean(-1, keepdim=True)
|
154 |
+
hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
|
155 |
+
return self.weight * hidden_states.to(input_dtype)
|
156 |
+
|
157 |
+
|
158 |
+
class FlashSelfAttention(torch.nn.Module):
|
159 |
+
# Extracted from https://github.com/microsoft/Megatron-DeepSpeed/blob/main/megatron/model/transformer.py
|
160 |
+
"""Implement the scaled dot product attention with softmax.
|
161 |
+
Arguments
|
162 |
+
---------
|
163 |
+
softmax_scale: The temperature to use for the softmax attention.
|
164 |
+
(default: 1/sqrt(d_keys) where d_keys is computed at
|
165 |
+
runtime)
|
166 |
+
attention_dropout: The dropout rate to apply to the attention
|
167 |
+
(default: 0.0)
|
168 |
+
"""
|
169 |
+
|
170 |
+
def __init__(self, causal=False, softmax_scale=None, attention_dropout=0.0,
|
171 |
+
device=None, dtype=None):
|
172 |
+
super().__init__()
|
173 |
+
assert flash_attn_unpadded_func is not None, ('Please install FlashAttention first, '
|
174 |
+
'e.g., with pip install flash-attn')
|
175 |
+
assert rearrange is not None, 'Please install einops first, e.g., with pip install einops'
|
176 |
+
self.causal = causal
|
177 |
+
self.softmax_scale = softmax_scale
|
178 |
+
self.dropout_p = attention_dropout
|
179 |
+
|
180 |
+
def forward(self, q, k, v):
|
181 |
+
"""Implements the multihead softmax attention.
|
182 |
+
Arguments
|
183 |
+
---------
|
184 |
+
q, k, v: The tensor containing the query, key, and value. (B, S, H, D)
|
185 |
+
"""
|
186 |
+
assert all((i.dtype in [torch.float16, torch.bfloat16] for i in (q, k, v)))
|
187 |
+
assert all((i.is_cuda for i in (q, k, v)))
|
188 |
+
|
189 |
+
batch_size, seqlen_q = q.shape[0], q.shape[1]
|
190 |
+
seqlen_k = k.shape[1]
|
191 |
+
|
192 |
+
q, k, v = [rearrange(x, 'b s ... -> (b s) ...') for x in [q, k, v]]
|
193 |
+
cu_seqlens_q = torch.arange(0, (batch_size + 1) * seqlen_q, step=seqlen_q, dtype=torch.int32,
|
194 |
+
device=q.device)
|
195 |
+
self.training = False
|
196 |
+
if self.training:
|
197 |
+
# during training q,k,v always have same seqlen
|
198 |
+
assert seqlen_k == seqlen_q
|
199 |
+
|
200 |
+
is_causal = self.causal
|
201 |
+
cu_seqlens_k = cu_seqlens_q
|
202 |
+
dropout_p = self.dropout_p
|
203 |
+
else:
|
204 |
+
# turn off FA causal mask after first inference autoregressive iteration
|
205 |
+
# only on first autoregressive step q,k,v have same seqlen
|
206 |
+
is_causal = seqlen_q == seqlen_k
|
207 |
+
cu_seqlens_k = torch.arange(0, (batch_size + 1) * seqlen_k, step=seqlen_k, dtype=torch.int32,
|
208 |
+
device=q.device)
|
209 |
+
dropout_p = 0
|
210 |
+
|
211 |
+
output = flash_attn_unpadded_func(
|
212 |
+
q, k, v, cu_seqlens_q, cu_seqlens_k, seqlen_q, seqlen_k,
|
213 |
+
dropout_p=dropout_p,
|
214 |
+
softmax_scale=self.softmax_scale, causal=is_causal
|
215 |
+
)
|
216 |
+
|
217 |
+
output = rearrange(output, '(b s) ... -> b s ...', b=batch_size)
|
218 |
+
return output
|
219 |
+
|
220 |
+
|
221 |
+
def _make_causal_mask(
|
222 |
+
input_ids_shape: torch.Size, device: torch.device, past_key_values_length: int
|
223 |
+
) -> torch.BoolTensor:
|
224 |
+
"""
|
225 |
+
Make causal mask used for self-attention.
|
226 |
+
"""
|
227 |
+
batch_size, target_length = input_ids_shape
|
228 |
+
mask = torch.empty((target_length, target_length + past_key_values_length), dtype=torch.bool, device=device)
|
229 |
+
# ONNX doesn't support `torch.Tensor.triu` properly, thus we use this workaround
|
230 |
+
seq_ids = torch.arange(target_length, device=device)
|
231 |
+
mask[:, past_key_values_length:] = seq_ids[:, None] < seq_ids[None, :]
|
232 |
+
|
233 |
+
if past_key_values_length > 0:
|
234 |
+
mask[:, :past_key_values_length] = False
|
235 |
+
|
236 |
+
expanded_mask = mask[None, None, :, :].expand(batch_size, 1, target_length, target_length + past_key_values_length)
|
237 |
+
return expanded_mask
|
238 |
+
|
239 |
+
|
240 |
+
def _expand_mask(mask: torch.Tensor, tgt_length: int) -> torch.BoolTensor:
|
241 |
+
"""
|
242 |
+
Expands attention_mask from `[batch_size, src_length]` to `[batch_size, 1, tgt_length, src_length]`.
|
243 |
+
"""
|
244 |
+
batch_size, src_length = mask.shape
|
245 |
+
tgt_length = tgt_length if tgt_length is not None else src_length
|
246 |
+
|
247 |
+
expanded_mask = ~(mask[:, None, None, :].to(torch.bool))
|
248 |
+
return expanded_mask.expand(batch_size, 1, tgt_length, src_length)
|
249 |
+
|
250 |
+
|
251 |
+
def dropout_add(x: torch.Tensor, residual: torch.Tensor, prob: float, training: bool) -> torch.Tensor:
|
252 |
+
"""
|
253 |
+
Dropout add function
|
254 |
+
|
255 |
+
Args:
|
256 |
+
x (`torch.tensor`, *required*):
|
257 |
+
input tensor
|
258 |
+
residual (`torch.tensor`, *required*):
|
259 |
+
residual tensor
|
260 |
+
prob (`float`, *required*):
|
261 |
+
dropout probability
|
262 |
+
training (`bool`, *required*):
|
263 |
+
training mode
|
264 |
+
"""
|
265 |
+
out = F.dropout(x, p=prob, training=training)
|
266 |
+
out = residual + out
|
267 |
+
return out
|
268 |
+
|
269 |
+
|
270 |
+
def telechat_gelu_forward(x: torch.Tensor) -> torch.Tensor:
|
271 |
+
"""
|
272 |
+
Custom bias GELU function. Adapted from Megatron-DeepSpeed code. Here we use a simple implementation (inference) to
|
273 |
+
make the model jitable.
|
274 |
+
|
275 |
+
Args:
|
276 |
+
x (`torch.tensor`, *required*):
|
277 |
+
input hidden states
|
278 |
+
"""
|
279 |
+
return x * 0.5 * (1.0 + torch.tanh(0.79788456 * x * (1 + 0.044715 * x * x)))
|
280 |
+
|
281 |
+
|
282 |
+
def telechat_gelu_back(g: torch.Tensor, x: torch.Tensor) -> torch.Tensor:
|
283 |
+
"""
|
284 |
+
gradient of tanh approximation of gelu gradient of actual gelu is: 0.5 * (1. + torch.erf(x * 0.70710678)) +
|
285 |
+
0.3989423 * x * torch.exp(-0.5 * x * x)
|
286 |
+
|
287 |
+
Args:
|
288 |
+
g (`torch.tensor`, *required*):
|
289 |
+
gradient output tensor
|
290 |
+
x (`torch.tensor`, *required*):
|
291 |
+
input tensor
|
292 |
+
"""
|
293 |
+
x = x[0] # x is a tuple of 1 element, needs to unpack it first
|
294 |
+
tanh_out = torch.tanh(0.79788456 * x * (1 + 0.044715 * x * x))
|
295 |
+
# sqrt(2/pi) * 3 * 0.044715 -> 0.1070322243
|
296 |
+
ff = 0.5 * x * ((1 - tanh_out * tanh_out) * (0.79788456 + 0.1070322243 * x * x)) + 0.5 * (1 + tanh_out)
|
297 |
+
return ff * g
|
298 |
+
|
299 |
+
|
300 |
+
class GeLUFunction(torch.autograd.Function):
|
301 |
+
@staticmethod
|
302 |
+
def forward(ctx, input: torch.Tensor) -> torch.Tensor:
|
303 |
+
ctx.save_for_backward(input)
|
304 |
+
return telechat_gelu_forward(input)
|
305 |
+
|
306 |
+
@staticmethod
|
307 |
+
def backward(ctx, grad_output: torch.Tensor) -> torch.Tensor:
|
308 |
+
input = ctx.saved_tensors
|
309 |
+
tmp = telechat_gelu_back(grad_output, input)
|
310 |
+
return tmp
|
311 |
+
|
312 |
+
|
313 |
+
class TelechatGelu(nn.Module):
|
314 |
+
"""
|
315 |
+
TelechatBiasGelu wrapper function that make use of the simple function on inference mode to make the model
|
316 |
+
torchscriptable and use the autograd function in training mode to get the accurate results of the gradients Partly
|
317 |
+
copied from Megatron-DeepSpeed code and adapted for our needs
|
318 |
+
|
319 |
+
See here why autograd functions are not torchscriptable: https://github.com/pytorch/pytorch/issues/22329
|
320 |
+
"""
|
321 |
+
|
322 |
+
def __init__(self):
|
323 |
+
super().__init__()
|
324 |
+
|
325 |
+
def forward(self, x: torch.Tensor) -> torch.Tensor:
|
326 |
+
if self.training:
|
327 |
+
return GeLUFunction.apply(x)
|
328 |
+
else:
|
329 |
+
return telechat_gelu_forward(x)
|
330 |
+
|
331 |
+
|
332 |
+
class TelechatAttention(nn.Module):
|
333 |
+
def __init__(self, config: TelechatConfig, layer_idx):
|
334 |
+
super().__init__()
|
335 |
+
self.kv_cache = None
|
336 |
+
self.layer_idx = layer_idx
|
337 |
+
|
338 |
+
self.hidden_size = config.hidden_size
|
339 |
+
self.num_heads = config.n_head
|
340 |
+
self.head_dim = self.hidden_size // self.num_heads
|
341 |
+
self.split_size = self.hidden_size
|
342 |
+
self.hidden_dropout = config.hidden_dropout
|
343 |
+
self.config = config
|
344 |
+
|
345 |
+
if self.head_dim * self.num_heads != self.hidden_size:
|
346 |
+
raise ValueError(
|
347 |
+
f"`hidden_size` must be divisible by num_heads (got `hidden_size`: {self.hidden_size} and `num_heads`:"
|
348 |
+
f" {self.num_heads})."
|
349 |
+
)
|
350 |
+
|
351 |
+
# Layer-wise attention scaling
|
352 |
+
self.inv_norm_factor = 1.0 / math.sqrt(self.head_dim)
|
353 |
+
self.beta = 1.0
|
354 |
+
|
355 |
+
self.num_key_value_heads = self.num_heads
|
356 |
+
kv_projection_size = self.head_dim * self.num_key_value_heads
|
357 |
+
self.num_key_value_groups = self.num_heads // self.num_key_value_heads
|
358 |
+
self.query = nn.Linear(self.hidden_size, self.hidden_size, bias=False)
|
359 |
+
self.key_value = nn.Linear(self.hidden_size, kv_projection_size * 2, bias=False)
|
360 |
+
self.dense = nn.Linear(self.hidden_size, self.hidden_size)
|
361 |
+
self.attention_dropout = nn.Dropout(config.attention_dropout)
|
362 |
+
self.rotary_emb = RotaryEmbedding(self.head_dim, config=config)
|
363 |
+
|
364 |
+
self.core_attention_flash = FlashSelfAttention(
|
365 |
+
causal=True, attention_dropout=config.attention_dropout
|
366 |
+
)
|
367 |
+
|
368 |
+
self.last_key_layer = None
|
369 |
+
|
370 |
+
def repeat_kv(self, hidden_states, n_rep):
|
371 |
+
slen, batch, num_key_value_heads_per_partition, head_dim = hidden_states.shape
|
372 |
+
if n_rep == 1:
|
373 |
+
return hidden_states
|
374 |
+
hidden_states = hidden_states[:, :, :, None, :].expand(slen, batch, num_key_value_heads_per_partition, n_rep,
|
375 |
+
head_dim)
|
376 |
+
return hidden_states.reshape(slen, batch, num_key_value_heads_per_partition * n_rep, head_dim)
|
377 |
+
|
378 |
+
def split_tensor_along_last_dim(self,
|
379 |
+
tensor: torch.Tensor,
|
380 |
+
num_partitions: int,
|
381 |
+
contiguous_split_chunks: bool = False,
|
382 |
+
):
|
383 |
+
|
384 |
+
# Get the size and dimension.
|
385 |
+
last_dim = tensor.dim() - 1
|
386 |
+
last_dim_size = tensor.size()[last_dim] // num_partitions
|
387 |
+
# Split.
|
388 |
+
tensor_list = torch.split(tensor, last_dim_size, dim=last_dim)
|
389 |
+
# Note: torch.split does not create contiguous tensors by default.
|
390 |
+
if contiguous_split_chunks:
|
391 |
+
return tuple(chunk.contiguous() for chunk in tensor_list)
|
392 |
+
|
393 |
+
return tensor_list
|
394 |
+
|
395 |
+
def _merge_heads(self, x: torch.Tensor) -> torch.Tensor:
|
396 |
+
batch_size_and_num_heads, seq_length, _ = x.shape
|
397 |
+
batch_size = batch_size_and_num_heads // self.num_heads
|
398 |
+
x = x.view(batch_size, self.num_heads, seq_length, self.head_dim)
|
399 |
+
x = x.permute(0, 2, 1, 3)
|
400 |
+
return x.reshape(batch_size, seq_length, self.num_heads * self.head_dim)
|
401 |
+
|
402 |
+
def forward(
|
403 |
+
self,
|
404 |
+
hidden_states: torch.Tensor,
|
405 |
+
residual: torch.Tensor,
|
406 |
+
attention_mask: torch.Tensor,
|
407 |
+
layer_past: Optional[Tuple[torch.Tensor, torch.Tensor]] = None,
|
408 |
+
use_cache: bool = False,
|
409 |
+
output_attentions: bool = False,
|
410 |
+
):
|
411 |
+
hidden_states = hidden_states.transpose(1, 0)
|
412 |
+
query_layer = self.query(hidden_states)
|
413 |
+
new_tensor_shape = query_layer.size()[:-1] + \
|
414 |
+
(self.num_heads,
|
415 |
+
self.head_dim)
|
416 |
+
query_layer = query_layer.view(*new_tensor_shape)
|
417 |
+
|
418 |
+
mixed_kv_layer = self.key_value(hidden_states)
|
419 |
+
new_tensor_shape = mixed_kv_layer.size()[:-1] + \
|
420 |
+
(self.num_key_value_heads,
|
421 |
+
2 * self.head_dim)
|
422 |
+
mixed_kv_layer = mixed_kv_layer.view(*new_tensor_shape)
|
423 |
+
(key_layer, value_layer) = self.split_tensor_along_last_dim(mixed_kv_layer, 2)
|
424 |
+
|
425 |
+
output_size = (query_layer.size(1),
|
426 |
+
query_layer.size(2),
|
427 |
+
query_layer.size(0),
|
428 |
+
key_layer.size(0))
|
429 |
+
|
430 |
+
query_layer = query_layer.view(output_size[2], output_size[0] * output_size[1], -1)
|
431 |
+
key_layer = key_layer.view(output_size[3], output_size[0] * output_size[1], -1)
|
432 |
+
|
433 |
+
apply_rotary_fn = apply_rotary_pos_emb_torch
|
434 |
+
|
435 |
+
seq_len = key_layer.shape[0]
|
436 |
+
offset = 0
|
437 |
+
|
438 |
+
if use_cache and layer_past != None:
|
439 |
+
past_key, past_value = layer_past
|
440 |
+
offset = past_key.shape[0]
|
441 |
+
seq_len += offset
|
442 |
+
|
443 |
+
cos, sin = self.rotary_emb(value_layer, seq_len=seq_len)
|
444 |
+
|
445 |
+
query_layer, key_layer = apply_rotary_fn(query_layer, key_layer, cos, sin, offset=offset)
|
446 |
+
if use_cache:
|
447 |
+
if layer_past != None:
|
448 |
+
past_key, past_value = layer_past
|
449 |
+
key_layer = torch.cat((past_key, key_layer[-1, ...].unsqueeze(0)), dim=0)
|
450 |
+
value_layer = torch.cat((past_value, value_layer[-1, ...].unsqueeze(0)), dim=0)
|
451 |
+
layer_past = key_layer, value_layer
|
452 |
+
s, bz, head, dim = value_layer.shape
|
453 |
+
s_key = key_layer.shape[0]
|
454 |
+
s_query = query_layer.shape[0]
|
455 |
+
query_layer = query_layer.reshape((s_query, bz, head, dim))
|
456 |
+
key_layer = key_layer.reshape((s_key, bz, head, dim))
|
457 |
+
|
458 |
+
if self.config.flash_attn:
|
459 |
+
q, k, v = [rearrange(x, 's b ... -> b s ...').contiguous() for x in
|
460 |
+
(query_layer, key_layer, value_layer)]
|
461 |
+
context_layer = self.core_attention_flash(q, k, v)
|
462 |
+
context_layer = rearrange(context_layer, 'b s h d -> b s (h d)').contiguous()
|
463 |
+
else:
|
464 |
+
##[sq, b, np, hn] -> [sq, b * np, hn]
|
465 |
+
query_layer = query_layer.reshape(s_query, bz * self.num_heads, dim)
|
466 |
+
# [sk, b, np, hn] -> [sk, b * np, hn]
|
467 |
+
key_layer = key_layer.reshape(s_key, bz * self.num_heads, dim)
|
468 |
+
matmul_result = self.inv_norm_factor * torch.einsum('bik,bkj->bij', query_layer.transpose(0, 1),
|
469 |
+
key_layer.transpose(0, 1).transpose(1, 2))
|
470 |
+
|
471 |
+
attention_scores = matmul_result.view(bz, self.num_heads, s_query, s_key)
|
472 |
+
|
473 |
+
input_dtype = attention_scores.dtype
|
474 |
+
if input_dtype == torch.float16:
|
475 |
+
attention_scores = attention_scores.to(torch.float)
|
476 |
+
attn_weights = torch.masked_fill(attention_scores, attention_mask, torch.finfo(attention_scores.dtype).min)
|
477 |
+
attention_probs = F.softmax(attn_weights, dim=-1).to(input_dtype) ##dtype = torch.float32
|
478 |
+
attention_probs = self.attention_dropout(attention_probs)
|
479 |
+
attention_probs_reshaped = attention_probs.view(bz * self.num_heads, s_query, s_key)
|
480 |
+
|
481 |
+
value_layer = value_layer.reshape(s_key, bz * self.num_heads, dim)
|
482 |
+
context_layer = torch.bmm(attention_probs_reshaped, value_layer.transpose(0, 1))
|
483 |
+
context_layer = self._merge_heads(context_layer)
|
484 |
+
|
485 |
+
output_tensor = self.dense(context_layer)
|
486 |
+
|
487 |
+
output_tensor = dropout_add(output_tensor, residual, self.hidden_dropout, self.training)
|
488 |
+
present = None
|
489 |
+
outputs = (output_tensor, present)
|
490 |
+
if output_attentions:
|
491 |
+
outputs += (attention_probs,)
|
492 |
+
|
493 |
+
return output_tensor, layer_past
|
494 |
+
|
495 |
+
|
496 |
+
class TelechatMLP(nn.Module):
|
497 |
+
def __init__(self, config: TelechatConfig):
|
498 |
+
super().__init__()
|
499 |
+
hidden_size = config.hidden_size
|
500 |
+
self.gate_proj = nn.Linear(hidden_size, config.ffn_hidden_size, bias=False)
|
501 |
+
self.up_proj = nn.Linear(hidden_size, config.ffn_hidden_size, bias=False)
|
502 |
+
self.down_proj = nn.Linear(config.ffn_hidden_size, hidden_size, bias=True)
|
503 |
+
self.hidden_dropout = config.hidden_dropout
|
504 |
+
|
505 |
+
def forward(self, hidden_states: torch.Tensor, residual: torch.Tensor) -> torch.Tensor:
|
506 |
+
intermediate_output = self.down_proj(F.silu(self.gate_proj(hidden_states)) * self.up_proj(hidden_states))
|
507 |
+
output = dropout_add(intermediate_output, residual, self.hidden_dropout, self.training)
|
508 |
+
return output
|
509 |
+
|
510 |
+
|
511 |
+
class TelechatBlock(nn.Module):
|
512 |
+
def __init__(self, config: TelechatConfig, layer_idx):
|
513 |
+
super().__init__()
|
514 |
+
hidden_size = config.hidden_size
|
515 |
+
|
516 |
+
self.input_layernorm = MixedFusedRMSNorm(hidden_size, eps=config.layer_norm_epsilon)
|
517 |
+
self.num_heads = config.n_head
|
518 |
+
self.layer_idx = layer_idx
|
519 |
+
self.self_attention = TelechatAttention(config, layer_idx)
|
520 |
+
self.post_attention_layernorm = MixedFusedRMSNorm(hidden_size, eps=config.layer_norm_epsilon)
|
521 |
+
|
522 |
+
self.mlp = TelechatMLP(config)
|
523 |
+
|
524 |
+
self.apply_residual_connection_post_layernorm = config.apply_residual_connection_post_layernorm
|
525 |
+
self.hidden_dropout = config.hidden_dropout
|
526 |
+
|
527 |
+
def forward(
|
528 |
+
self,
|
529 |
+
hidden_states: torch.Tensor,
|
530 |
+
attention_mask: torch.Tensor,
|
531 |
+
layer_past: Optional[Tuple[torch.Tensor, torch.Tensor]] = None,
|
532 |
+
use_cache: bool = False,
|
533 |
+
output_attentions: bool = False,
|
534 |
+
):
|
535 |
+
layernorm_output = self.input_layernorm(hidden_states)
|
536 |
+
if self.apply_residual_connection_post_layernorm:
|
537 |
+
residual = layernorm_output
|
538 |
+
else:
|
539 |
+
residual = hidden_states
|
540 |
+
|
541 |
+
attn_outputs = self.self_attention(
|
542 |
+
layernorm_output,
|
543 |
+
residual,
|
544 |
+
layer_past=layer_past,
|
545 |
+
attention_mask=attention_mask,
|
546 |
+
use_cache=use_cache,
|
547 |
+
output_attentions=output_attentions,
|
548 |
+
)
|
549 |
+
|
550 |
+
attention_output = attn_outputs[0]
|
551 |
+
outputs = attn_outputs[1:]
|
552 |
+
layernorm_output = self.post_attention_layernorm(attention_output)
|
553 |
+
|
554 |
+
if self.apply_residual_connection_post_layernorm:
|
555 |
+
residual = layernorm_output
|
556 |
+
else:
|
557 |
+
residual = attention_output
|
558 |
+
output = self.mlp(layernorm_output, residual)
|
559 |
+
|
560 |
+
if use_cache:
|
561 |
+
outputs = (output,) + outputs
|
562 |
+
else:
|
563 |
+
outputs = (output,) + outputs[1:]
|
564 |
+
|
565 |
+
return outputs
|
566 |
+
|
567 |
+
|
568 |
+
class TelechatPreTrainedModel(PreTrainedModel):
|
569 |
+
config_class = TelechatConfig
|
570 |
+
base_model_prefix = "transformer"
|
571 |
+
supports_gradient_checkpointing = True
|
572 |
+
_no_split_modules = ["TelechatBlock"]
|
573 |
+
_skip_keys_device_placement = "past_key_values"
|
574 |
+
|
575 |
+
def __init__(self, *inputs, **kwargs):
|
576 |
+
super().__init__(*inputs, **kwargs)
|
577 |
+
|
578 |
+
def _init_weights(self, module: nn.Module):
|
579 |
+
"""Initialize the weights."""
|
580 |
+
if isinstance(module, nn.Linear):
|
581 |
+
module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
|
582 |
+
if module.bias is not None:
|
583 |
+
module.bias.data.zero_()
|
584 |
+
|
585 |
+
elif isinstance(module, nn.Embedding):
|
586 |
+
module.weight.data.normal_(mean=0.0, std=self.config.initializer_range)
|
587 |
+
if module.padding_idx is not None:
|
588 |
+
module.weight.data[module.padding_idx].zero_()
|
589 |
+
|
590 |
+
elif isinstance(module, LayerNorm):
|
591 |
+
module.bias.data.zero_()
|
592 |
+
module.weight.data.fill_(1.0)
|
593 |
+
|
594 |
+
def _set_gradient_checkpointing(self, module: nn.Module, value: bool = False):
|
595 |
+
if isinstance(module, TelechatModel):
|
596 |
+
module.gradient_checkpointing = value
|
597 |
+
|
598 |
+
|
599 |
+
class TelechatModel(TelechatPreTrainedModel):
|
600 |
+
def __init__(self, config: TelechatConfig):
|
601 |
+
super().__init__(config)
|
602 |
+
|
603 |
+
self.embed_dim = config.hidden_size
|
604 |
+
self.num_heads = config.n_head
|
605 |
+
self.config = config
|
606 |
+
self.word_embeddings = nn.Embedding(config.vocab_size, self.embed_dim)
|
607 |
+
if self.config.embed_layernorm:
|
608 |
+
self.word_embeddings_layernorm = MixedFusedRMSNorm(self.embed_dim, eps=config.layer_norm_epsilon)
|
609 |
+
|
610 |
+
self.h = nn.ModuleList([TelechatBlock(config, _) for _ in range(config.num_hidden_layers)])
|
611 |
+
self.ln_f = MixedFusedRMSNorm(self.embed_dim, eps=config.layer_norm_epsilon)
|
612 |
+
self.gradient_checkpointing = False
|
613 |
+
self.post_init()
|
614 |
+
|
615 |
+
def get_input_embeddings(self):
|
616 |
+
return self.word_embeddings
|
617 |
+
|
618 |
+
def _prepare_attn_mask(
|
619 |
+
self, attention_mask: torch.Tensor, input_shape: Tuple[int, int], past_key_values_length: int
|
620 |
+
) -> torch.BoolTensor:
|
621 |
+
combined_attention_mask = None
|
622 |
+
device = attention_mask.device
|
623 |
+
_, src_length = input_shape
|
624 |
+
|
625 |
+
if src_length > 1:
|
626 |
+
combined_attention_mask = _make_causal_mask(
|
627 |
+
input_shape, device=device, past_key_values_length=past_key_values_length
|
628 |
+
)
|
629 |
+
expanded_attn_mask = _expand_mask(attention_mask, tgt_length=src_length)
|
630 |
+
combined_attention_mask = (
|
631 |
+
expanded_attn_mask if combined_attention_mask is None else expanded_attn_mask | combined_attention_mask
|
632 |
+
)
|
633 |
+
|
634 |
+
return combined_attention_mask
|
635 |
+
|
636 |
+
def set_input_embeddings(self, new_embeddings: torch.Tensor):
|
637 |
+
self.word_embeddings = new_embeddings
|
638 |
+
|
639 |
+
def forward(
|
640 |
+
self,
|
641 |
+
input_ids: Optional[torch.LongTensor] = None,
|
642 |
+
past_key_values: Optional[Tuple[Tuple[torch.Tensor, torch.Tensor], ...]] = None,
|
643 |
+
attention_mask: Optional[torch.Tensor] = None,
|
644 |
+
inputs_embeds: Optional[torch.LongTensor] = None,
|
645 |
+
use_cache: Optional[bool] = None,
|
646 |
+
output_attentions: Optional[bool] = None,
|
647 |
+
output_hidden_states: Optional[bool] = None,
|
648 |
+
return_dict: Optional[bool] = None,
|
649 |
+
**deprecated_arguments,
|
650 |
+
) -> Union[Tuple[torch.Tensor, ...], BaseModelOutputWithPastAndCrossAttentions]:
|
651 |
+
|
652 |
+
output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
|
653 |
+
output_hidden_states = (
|
654 |
+
output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
|
655 |
+
)
|
656 |
+
use_cache = use_cache if use_cache is not None else self.config.use_cache
|
657 |
+
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
658 |
+
|
659 |
+
if input_ids is not None:
|
660 |
+
batch_size, seq_length = input_ids.shape
|
661 |
+
elif inputs_embeds is not None:
|
662 |
+
batch_size, seq_length, _ = inputs_embeds.shape
|
663 |
+
|
664 |
+
if past_key_values is None:
|
665 |
+
past_key_values = tuple([None] * len(self.h))
|
666 |
+
|
667 |
+
if inputs_embeds is None:
|
668 |
+
inputs_embeds = self.word_embeddings(input_ids)
|
669 |
+
hidden_states = inputs_embeds
|
670 |
+
|
671 |
+
if self.config.embed_layernorm:
|
672 |
+
hidden_states = self.word_embeddings_layernorm(inputs_embeds)
|
673 |
+
|
674 |
+
presents = () if use_cache else None
|
675 |
+
all_self_attentions = () if output_attentions else None
|
676 |
+
all_hidden_states = () if output_hidden_states else None
|
677 |
+
|
678 |
+
if self.gradient_checkpointing and self.training:
|
679 |
+
if use_cache:
|
680 |
+
use_cache = False
|
681 |
+
|
682 |
+
seq_length_with_past = seq_length
|
683 |
+
past_key_values_length = 0
|
684 |
+
if past_key_values[0] is not None:
|
685 |
+
past_key_values_length = past_key_values[0][0].shape[2]
|
686 |
+
seq_length_with_past = seq_length_with_past + past_key_values_length
|
687 |
+
if attention_mask is None:
|
688 |
+
attention_mask = torch.ones((batch_size, seq_length_with_past), device=hidden_states.device)
|
689 |
+
else:
|
690 |
+
attention_mask = attention_mask.to(hidden_states.device)
|
691 |
+
causal_mask = self._prepare_attn_mask(
|
692 |
+
attention_mask,
|
693 |
+
input_shape=(batch_size, seq_length),
|
694 |
+
past_key_values_length=past_key_values_length,
|
695 |
+
)
|
696 |
+
|
697 |
+
for i, (block, layer_past) in enumerate(zip(self.h, past_key_values)):
|
698 |
+
if output_hidden_states:
|
699 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
700 |
+
|
701 |
+
if self.gradient_checkpointing and self.training:
|
702 |
+
|
703 |
+
def create_custom_forward(module):
|
704 |
+
def custom_forward(*inputs):
|
705 |
+
# None for past_key_value
|
706 |
+
return module(*inputs, use_cache=use_cache, output_attentions=output_attentions)
|
707 |
+
|
708 |
+
return custom_forward
|
709 |
+
|
710 |
+
outputs = torch.utils.checkpoint.checkpoint(
|
711 |
+
create_custom_forward(block),
|
712 |
+
hidden_states,
|
713 |
+
causal_mask,
|
714 |
+
layer_past,
|
715 |
+
)
|
716 |
+
else:
|
717 |
+
outputs = block(
|
718 |
+
hidden_states,
|
719 |
+
layer_past=layer_past,
|
720 |
+
attention_mask=causal_mask,
|
721 |
+
use_cache=use_cache,
|
722 |
+
output_attentions=output_attentions,
|
723 |
+
)
|
724 |
+
|
725 |
+
hidden_states = outputs[0]
|
726 |
+
if use_cache is True:
|
727 |
+
presents = presents + (outputs[1],)
|
728 |
+
|
729 |
+
if output_attentions:
|
730 |
+
all_self_attentions = all_self_attentions + (outputs[2 if use_cache else 1],)
|
731 |
+
hidden_states = self.ln_f(hidden_states)
|
732 |
+
if output_hidden_states:
|
733 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
734 |
+
if not return_dict:
|
735 |
+
return tuple(v for v in [hidden_states, presents, all_hidden_states, all_self_attentions] if v is not None)
|
736 |
+
return BaseModelOutputWithPastAndCrossAttentions(
|
737 |
+
last_hidden_state=hidden_states,
|
738 |
+
past_key_values=presents,
|
739 |
+
hidden_states=all_hidden_states,
|
740 |
+
attentions=all_self_attentions,
|
741 |
+
)
|
742 |
+
|
743 |
+
|
744 |
+
class TelechatForCausalLM(TelechatPreTrainedModel):
|
745 |
+
# _tied_weights_keys = ["lm_head.weight"]
|
746 |
+
_keys_to_ignore_on_load_missing = [r"lm_head.weight"]
|
747 |
+
|
748 |
+
def __init__(self, config: TelechatConfig):
|
749 |
+
super().__init__(config)
|
750 |
+
self.transformer = TelechatModel(config)
|
751 |
+
self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
|
752 |
+
self.post_init()
|
753 |
+
|
754 |
+
def get_output_embeddings(self):
|
755 |
+
return self.lm_head
|
756 |
+
|
757 |
+
def set_output_embeddings(self, new_embeddings: torch.Tensor):
|
758 |
+
self.lm_head = new_embeddings
|
759 |
+
|
760 |
+
def prepare_inputs_for_generation(
|
761 |
+
self,
|
762 |
+
input_ids: torch.LongTensor,
|
763 |
+
past_key_values: Optional[torch.Tensor] = None,
|
764 |
+
attention_mask: Optional[torch.Tensor] = None,
|
765 |
+
inputs_embeds: Optional[torch.Tensor] = None,
|
766 |
+
**kwargs,
|
767 |
+
) -> dict:
|
768 |
+
if past_key_values:
|
769 |
+
input_ids = input_ids[:, -1].unsqueeze(-1)
|
770 |
+
if inputs_embeds is not None and past_key_values is None:
|
771 |
+
model_inputs = {"inputs_embeds": inputs_embeds}
|
772 |
+
else:
|
773 |
+
model_inputs = {"input_ids": input_ids}
|
774 |
+
|
775 |
+
model_inputs.update(
|
776 |
+
{
|
777 |
+
"past_key_values": past_key_values,
|
778 |
+
"use_cache": kwargs.get("use_cache"),
|
779 |
+
"attention_mask": attention_mask,
|
780 |
+
}
|
781 |
+
)
|
782 |
+
return model_inputs
|
783 |
+
|
784 |
+
def forward(
|
785 |
+
self,
|
786 |
+
input_ids: Optional[torch.LongTensor] = None,
|
787 |
+
past_key_values: Optional[Tuple[Tuple[torch.Tensor, torch.Tensor], ...]] = None,
|
788 |
+
attention_mask: Optional[torch.Tensor] = None,
|
789 |
+
inputs_embeds: Optional[torch.Tensor] = None,
|
790 |
+
labels: Optional[torch.Tensor] = None,
|
791 |
+
use_cache: Optional[bool] = None,
|
792 |
+
output_attentions: Optional[bool] = None,
|
793 |
+
output_hidden_states: Optional[bool] = None,
|
794 |
+
return_dict: Optional[bool] = None,
|
795 |
+
**deprecated_arguments,
|
796 |
+
) -> Union[Tuple[torch.Tensor], CausalLMOutputWithCrossAttentions]:
|
797 |
+
|
798 |
+
return_dict = return_dict if return_dict is not None else self.config.use_return_dict
|
799 |
+
|
800 |
+
transformer_outputs = self.transformer(
|
801 |
+
input_ids,
|
802 |
+
past_key_values=past_key_values,
|
803 |
+
attention_mask=attention_mask,
|
804 |
+
inputs_embeds=inputs_embeds,
|
805 |
+
use_cache=use_cache,
|
806 |
+
output_attentions=output_attentions,
|
807 |
+
output_hidden_states=output_hidden_states,
|
808 |
+
return_dict=return_dict,
|
809 |
+
)
|
810 |
+
hidden_states = transformer_outputs[0]
|
811 |
+
lm_logits = self.lm_head(hidden_states)
|
812 |
+
|
813 |
+
loss = None
|
814 |
+
if labels is not None:
|
815 |
+
labels = labels.to(lm_logits.device)
|
816 |
+
shift_logits = lm_logits[..., :-1, :].contiguous()
|
817 |
+
shift_labels = labels[..., 1:].contiguous()
|
818 |
+
batch_size, seq_length, vocab_size = shift_logits.shape
|
819 |
+
loss_fct = CrossEntropyLoss()
|
820 |
+
loss = loss_fct(
|
821 |
+
shift_logits.view(batch_size * seq_length, vocab_size), shift_labels.view(batch_size * seq_length)
|
822 |
+
)
|
823 |
+
|
824 |
+
if not return_dict:
|
825 |
+
output = (lm_logits,) + transformer_outputs[1:]
|
826 |
+
return ((loss,) + output) if loss is not None else output
|
827 |
+
|
828 |
+
return CausalLMOutputWithCrossAttentions(
|
829 |
+
loss=loss,
|
830 |
+
logits=lm_logits,
|
831 |
+
past_key_values=transformer_outputs.past_key_values,
|
832 |
+
hidden_states=transformer_outputs.hidden_states,
|
833 |
+
attentions=transformer_outputs.attentions,
|
834 |
+
)
|
835 |
+
|
836 |
+
def chat(self, tokenizer, question: str = '', history: Union[List[Dict], History] = None, stream: bool = False,
|
837 |
+
generation_config: Optional[GenerationConfig] = None, **kwargs):
|
838 |
+
"""
|
839 |
+
Args:
|
840 |
+
tokenizer: the tokenizer of telechat
|
841 |
+
question: question which the model reply in this turn
|
842 |
+
history: history which will format the input for telechat
|
843 |
+
stream: if return the full text at last or yield the text in token
|
844 |
+
generation_config: configuration for generation
|
845 |
+
**kwargs: args which will update the generation config or pass to model forward
|
846 |
+
"""
|
847 |
+
generation_config = generation_config or self.generation_config
|
848 |
+
if not generation_config:
|
849 |
+
logger.error("generation_config is None")
|
850 |
+
raise ValueError("generation_config must not be None")
|
851 |
+
if not question:
|
852 |
+
logger.error("question is empty")
|
853 |
+
raise ValueError("question must not be empty")
|
854 |
+
if history is None:
|
855 |
+
history = []
|
856 |
+
|
857 |
+
# we update and check generate_config here for building inputs.
|
858 |
+
|
859 |
+
generation_config = copy.deepcopy(generation_config)
|
860 |
+
user_id = generation_config.user_token_id
|
861 |
+
bot_id = generation_config.bot_token_id
|
862 |
+
model_kwargs = generation_config.update(**kwargs)
|
863 |
+
generation_config.validate()
|
864 |
+
|
865 |
+
# transfer to History
|
866 |
+
if not isinstance(history, History):
|
867 |
+
history = History(tokenizer, history)
|
868 |
+
|
869 |
+
inputs = self.build_inputs_for_chat(tokenizer, question, history, generation_config, user_id, bot_id)
|
870 |
+
history.append({"role": "user", "content": question})
|
871 |
+
if stream:
|
872 |
+
streamer = TelechatIterTextStreamer(tokenizer, history,skip_prompt=True)
|
873 |
+
Thread(target=self.generate, kwargs=dict(
|
874 |
+
inputs=inputs.to(self.device), streamer=streamer,
|
875 |
+
generation_config=generation_config, **model_kwargs
|
876 |
+
)).start()
|
877 |
+
return streamer
|
878 |
+
else:
|
879 |
+
outputs = self.generate(inputs.to(self.device), generation_config=generation_config, **model_kwargs)
|
880 |
+
response = tokenizer.decode(outputs[0][len(inputs[0]):-1])
|
881 |
+
history.append({"role": "bot", "content": response})
|
882 |
+
return response, history
|
883 |
+
|
884 |
+
def build_inputs_for_chat(self, tokenizer, question, history, generation_config, usr_id, bot_id):
|
885 |
+
"""
|
886 |
+
check history and build inputs here
|
887 |
+
"""
|
888 |
+
# first tokenize question
|
889 |
+
q_token = tokenizer(question)
|
890 |
+
qa_history = copy.deepcopy(history)
|
891 |
+
|
892 |
+
# get the max length we should build our inputs in
|
893 |
+
model_max_length = self.config.seq_length
|
894 |
+
build_max_length = max(0, model_max_length - generation_config.max_new_tokens) \
|
895 |
+
if generation_config.max_new_tokens else max(0, generation_config.max_length)
|
896 |
+
if build_max_length < 3:
|
897 |
+
logger.warning("the model can not meet the requirements of input length,Please check config")
|
898 |
+
raise ValueError("")
|
899 |
+
|
900 |
+
# trunc left
|
901 |
+
input_tokens = [usr_id] + q_token["input_ids"][-build_max_length + 1:] + [bot_id]
|
902 |
+
length = len(input_tokens)
|
903 |
+
|
904 |
+
while len(qa_history) != 0:
|
905 |
+
message = qa_history.pop()
|
906 |
+
if message["role"] == "user":
|
907 |
+
tokens = [usr_id] + message["input_ids"]
|
908 |
+
elif message["role"] == "bot":
|
909 |
+
tokens = [bot_id] + message["input_ids"] + [generation_config.eos_token_id]
|
910 |
+
else:
|
911 |
+
tokens = []
|
912 |
+
if len(tokens) + length >= build_max_length:
|
913 |
+
break
|
914 |
+
else:
|
915 |
+
input_tokens = tokens + input_tokens
|
916 |
+
|
917 |
+
return torch.tensor([input_tokens], dtype=torch.int64)
|
pytorch_model.bin.index.json
ADDED
@@ -0,0 +1,309 @@
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|
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|
|
|
1 |
+
{
|
2 |
+
"metadata": {
|
3 |
+
"total_size": 14400036864
|
4 |
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},
|
5 |
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|
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