baichuan2

Baichuan2

In this directory, you will find examples on how you could apply BigDL-LLM INT4 optimizations on Baichuan2 models. For illustration purposes, we utilize the baichuan-inc/Baichuan2-13B-Chat as a reference Baichuan model.

0. Requirements

To run these examples with BigDL-LLM, we have some recommended requirements for your machine, please refer to here for more information.

Example: Predict Tokens using generate() API

In the example generate.py, we show a basic use case for a Baichuan model to predict the next N tokens using generate() API, with BigDL-LLM INT4 optimizations.

1. Install

We suggest using conda to manage environment:

conda create -n llm python=3.9
conda activate llm

pip install bigdl-llm[all] # install bigdl-llm with 'all' option
pip install transformers_stream_generator  # additional package required for Baichuan-13B-Chat to conduct generation

2. Run

python ./generate.py --repo-id-or-model-path REPO_ID_OR_MODEL_PATH --prompt PROMPT --n-predict N_PREDICT

Arguments info:

• --repo-id-or-model-path REPO_ID_OR_MODEL_PATH: argument defining the huggingface repo id for the Baichuan2 model to be downloaded, or the path to the huggingface checkpoint folder. It is default to be 'baichuan-inc/Baichuan2-13B-Chat'.
• --prompt PROMPT: argument defining the prompt to be infered (with integrated prompt format for chat). It is default to be 'AI是什么？'.
• --n-predict N_PREDICT: argument defining the max number of tokens to predict. It is default to be 32.

Note: When loading the model in 4-bit, BigDL-LLM converts linear layers in the model into INT4 format. In theory, a XB model saved in 16-bit will requires approximately 2X GB of memory for loading, and ~0.5X GB memory for further inference.

Please select the appropriate size of the Baichuan model based on the capabilities of your machine.

2.1 Client

On client Windows machine, it is recommended to run directly with full utilization of all cores:

python ./generate.py 

2.2 Server

For optimal performance on server, it is recommended to set several environment variables (refer to here for more information), and run the example with all the physical cores of a single socket.

E.g. on Linux,

# set BigDL-Nano env variables
source bigdl-nano-init

# e.g. for a server with 48 cores per socket
export OMP_NUM_THREADS=48
numactl -C 0-47 -m 0 python ./generate.py

2.3 Sample Output

baichuan-inc/Baichuan2-13B-Chat

Inference time: xxxx s
-------------------- Prompt --------------------
<human>AI是什么？ <bot>
-------------------- Output --------------------
<human>AI是什么？ <bot>人工智能（AI）是指由计算机系统或其他数字设备模拟、扩展和增强人类智能的科学和技术。它涉及到多个领域，如机器学习、计算机视觉、

Inference time: xxxx s
-------------------- Prompt --------------------
<human>解释一下“温故而知新” <bot>
-------------------- Output --------------------
<human>解释一下“温故而知新” <bot>这句话出自《论语·为政》篇，意思是通过回顾过去的事情来获取新的理解和认识。简单来说就是：温习学过的知识，可以从中