YuYan: Pre-training of Language Models for Story Generation
YuYan is a series of Chinese language models with different size, developed by Fuxi AI lab, Netease.Inc. They are trained on a large Chinese novel dataset of high quality.
YuYan is in the same family of decoder-only models like GPT2 and GPT-3. As such, it was pretrained using the self-supervised causal language modedling objective.
Because the training data is mainly the novel, the model is good at generating the next plot given the story context.
Model Inference Acceleration
As the model size increases, the model inference time increases and more computational resources are required.
Therefore, we developed our own transformer model inference acceleration framework, EET. More details are in Easy and Efficient Transformer: Scalable Inference Solution For Large NLP Model.
We combine our language model with the EET inference framework to provide industrial-grade inference reasoning performance.
How to use
Our model is trained based on the fairseq. As a result, the inference and finetuning depend on it.
For inference, we modify some parts of the original fairseq codes. Mainly
fairseq-0.12.2/fairseq/sequence_generator.py
We integrate the EET with sequence_generator. We replace the eos token to a token unlikely to be sampled to ensure the generated text length. The repetition penalty trick is also modified. You can change the penalty strength by adjusting the value of self.ban_weight.
Then, to keep the eos token in the final generated text, we change the line 75 include_eos=False to include_eos=True in
fairseq-0.12.2/fairseq/data/dictionary.py
Finally, to pass in parameters in python scripts, we remove the line 67 ~ line 69 in
fairseq-0.12.2/fairseq/dataclass/utils.py
Below are the install tutorial.
# install pytorch
pip install torch==1.8.1 # install pytorch
# install fairseq
unzip fairseq-0.12.2.zip
cd fairseq-0.12.2
pip install.
# install EET
git clone https://github.com/NetEase-FuXi/EET.git
cd EET
pip install .
# install transformers (EET requirements)
pip install transformers==4.23
# make a folder, move the dictionary file and model file into it.
mkdir transformer_lm_gpt2_medium
mv dict.txt transformer_lm_gpt2_medium/
mv checkpoint_best.pt transformer_lm_gpt2_medium/
inference.py is a script to provide a interface to initialize the EET object and sequence_generator. In addition, It includes some pre-process and post-process functions for text input and output. You can modify the script according to your needs.
After the environment is ready, several lines of codes can realize the inference.
from inference import Inference
model_path = "transformer_lm_gpt2_medium/checkpoint_best.pt"
data_path = "transformer_lm_gpt2_medium"
eet_batch_size = 10 # max inference batch size, adjust according to cuda memory
inference = Inference(model_path, data_path, eet_batch_size)
inp = "田园一听这话，轻挑的嘴角放了下来，两腿叉开，踱着方步，跨过汤婆子，一屁股坐在了老人面前。</s>刘萌和健军一左一右站在他身旁，像是王朝、马汉护着包公断案。"
text = inference([inp] * 10, append_right_eos=True)
This interface supports batch inputs, so if you need to generate multiple results for one input, you can copy the input multiple times. The interface supports results generated for multiple different inputs, e.g.
text = inference(["四个月后，正是草长花秾的暮春季节。</s>令狐冲和盈盈新婚燕尔，携手共赴华山。","院子中传来急促的脚步声，他停下手中的招式，将开元刀插入刀鞘。"])
Citation
If you find the technical report or resource is useful, please cite the following technical report in your paper.
@inproceedings{li-etal-2022-easy,
title = "Easy and Efficient Transformer: Scalable Inference Solution For Large {NLP} Model",
author = "Li, Gongzheng and
Xi, Yadong and
Ding, Jingzhen and
Wang, Duan and
Luo, Ziyang and
Zhang, Rongsheng and
Liu, Bai and
Fan, Changjie and
Mao, Xiaoxi and
Zhao, Zeng",
booktitle = "Proceedings of the 2022 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies: Industry Track",
month = jul,
year = "2022",
address = "Hybrid: Seattle, Washington + Online",
publisher = "Association for Computational Linguistics",
url = "https://aclanthology.org/2022.naacl-industry.8",
doi = "10.18653/v1/2022.naacl-industry.8",
pages = "62--68"
}
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