docs/awq.md

AWQ 4bit Inference

We integrated AWQ into FastChat to provide efficient and accurate 4bit LLM inference.

Install AWQ

Setup environment (please refer to this link for more details):

conda create -n fastchat-awq python=3.10 -y
conda activate fastchat-awq
# cd /path/to/FastChat
pip install --upgrade pip    # enable PEP 660 support
pip install -e .             # install fastchat

git clone https://github.com/mit-han-lab/llm-awq repositories/llm-awq
cd repositories/llm-awq
pip install -e .             # install awq package

cd awq/kernels				
python setup.py install	     # install awq CUDA kernels

Chat with the CLI

# Download quantized model from huggingface
# Make sure you have git-lfs installed (https://git-lfs.com)
git lfs install
git clone https://huggingface.co/mit-han-lab/vicuna-7b-v1.3-4bit-g128-awq

# You can specify which quantized model to use by setting --awq-ckpt
python3 -m fastchat.serve.cli \
    --model-path models/vicuna-7b-v1.3-4bit-g128-awq \
    --awq-wbits 4 \
    --awq-groupsize 128 

Benchmark

• Through 4-bit weight quantization, AWQ helps to run larger language models within the device memory restriction and prominently accelerates token generation. All benchmarks are done with group_size 128.

• Benchmark on NVIDIA RTX A6000:

  Model	Bits	Max Memory (MiB)	Speed (ms/token)	AWQ Speedup
  vicuna-7b	16	13543	26.06	/
  vicuna-7b	4	5547	12.43	2.1x
  llama2-7b-chat	16	13543	27.14	/
  llama2-7b-chat	4	5547	12.44	2.2x
  vicuna-13b	16	25647	44.91	/
  vicuna-13b	4	9355	17.30	2.6x
  llama2-13b-chat	16	25647	47.28	/
  llama2-13b-chat	4	9355	20.28	2.3x

• NVIDIA RTX 4090:

  Model	AWQ 4bit Speed (ms/token)	FP16 Speed (ms/token)	AWQ Speedup
  vicuna-7b	8.61	19.09	2.2x
  llama2-7b-chat	8.66	19.97	2.3x
  vicuna-13b	12.17	OOM	/
  llama2-13b-chat	13.54	OOM	/

• NVIDIA Jetson Orin:

  Model	AWQ 4bit Speed (ms/token)	FP16 Speed (ms/token)	AWQ Speedup
  vicuna-7b	65.34	93.12	1.4x
  llama2-7b-chat	75.11	104.71	1.4x
  vicuna-13b	115.40	OOM	/
  llama2-13b-chat	136.81	OOM	/