xc-llm-kunlun/docs/source/user_guide/feature_guide/quantization.md

Quantization Guide

Note: This feature is currently experimental. In future versions, there may be behavioral changes around configuration, coverage, performance improvement.

Like vLLM, we now support quantization methods such as compressed-tensors, AWQ, and GPTQ, enabling various precision configurations including W8A8, W4A16, and W8A16. These can help reduce memory consumption and accelerate inference while preserving model accuracy.

Usages

Compressed-tensor

To run a compressed-tensors model with vLLM-kunlun, you should first add the below configuration to the model's config.json:

"quantization_config": {
    "quant_method": "compressed-tensors"
  }

Then you run Qwen/Qwen3-30B-A3B with dynamic W8A8 quantization with the following command:

python -m vllm.entrypoints.openai.api_server \
    --model Qwen/Qwen3-30B-A3B \
    --quantization compressed-tensors

AWQ

To run an AWQ model with vLLM-kunlun, you can use Qwen/Qwen3-32B-AWQ with the following command:

python -m vllm.entrypoints.openai.api_server \
    --model Qwen/Qwen3-32B-AWQ \
    --quantization awq

GPTQ

To run a GPTQ model with vLLM-kunlun, you can use Qwen/Qwen2.5-7B-Instruct-GPTQ-Int4 with the following command:

python -m vllm.entrypoints.openai.api_server \
    --model Qwen/Qwen2.5-7B-Instruct-GPTQ-Int4 \
    --quantization gptq