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lm-quant-toolkit

A library and toolkit for Large language Model quantization research.

Large Language Models (LLMs) have demonstrated significant capabilities in intelligent activities such as natural language comprehension, content generation, and knowledge retrieval. However, training and deploying these models require substantial computation resources, setting up a significant barrier for developing AI applications and conducting research. Various model compression techniques have been developed to address the demanding computational resource issue. Nonetheless, there has been limited exploration into high-level quantization strategy orthogonal to existing methods to offer better flexibility of balancing the trade-off between memory usage and accuracy. And maximize

Requirements

The following softwares and libraries are primary dependencies of this project.

  • Python 3.11 recommended
  • miniconda
  • CUDA 12.x
  • AutoAWQ
  • AutoGPTQ
  • HQQ
  • CLIP_benchmark(for ViT model evaluation)

For complete dependencies, please review the pyproject.toml file.

Features

  • Oraginze complex quantization experiments
  • Collect experiments process data
  • Run perplexity, Open LLM LeaderBoard benchmarks
  • Create fnorm dataset
  • Extract data from original/quantized models

Setup

conda create -n lm-quant-toolkit
conda activate lm-quant-toolkit
pip install -e .

Usage

This toolkit offers a command line utility named cli.py to help conducting experiments such as quantizing, evaluating langauge models and transformer vision models. The cli.py tool is designed to run long running experiments. It collects the perplexity, Open LLM LeaderBoard scores durations and GPU memory consumptions under various experiment settings. These experiment data are recorded in .csv format to ease further analysis and reporting.

Run quantizations

This toolkit support selected Llama and OpenCLIP ViT model quantization. For Llama models, the supported algorithms include:

  • AWQ
  • GPTQ
  • HQQ
  • MXQ

The following command can be used to quantize the Llama-2-7b, Llama-2-13b-hf, Llama-3-8B models(denoted as 0, 1, 2 respectively) using MXQ algorithm:

python src/cli.py llm \
    --task quant \
    --model 0 1 2 \
    --algo mxq \
    --config 4.00 \
    --experiment-name quant_llama-4_00-mxq \
    --quant-snapshot-dir="/fdata/llm/mxq/snapshots" \
    --result-dir="/fdata/llm/mxq/results" \
    2>&1 \
    | tee logs/bench-$(date +%Y%m%d%H%M%S).log

Prepare FNorm dataset for MXQ quantization

The MXQ quantization method discovers optimal quantization configuration such as group size, bit width for large number of weight matricies so that it can produce quantized model with minimal accuracy degradation while confines to fixed memory budget. All possible meta data about quantization accuracy, measured in Frobenius Norm, under given bit width, group size should be collected in advance. The fnorm tool is designed to serve this purpose. Run the following comand to produce fnorm dataset:

python src/lm_quant_toolkit/prep/fnorm.py

This program supports the following Llama models:

  • meta-llama/Llama-2-7b-hf
  • meta-llama/Llama-2-13b-hf
  • meta-llama/Meta-Llama-3-8B
  • meta-llama/Meta-Llama-3-70B
  • meta-llama/Llama-2-70b-hf
  • meta-llama/Meta-Llama-3-70B-Instruct
  • meta-llama/Meta-Llama-3.1-405B-Instruct