lmdeploy 0.2.4

A toolset for compressing, deploying and serving LLM

English | 简体中文

👋 join us on Twitter, Discord and WeChat

---

Latest News 🎉

2024

• [2024/01] OpenAOE seamless integration with LMDeploy Serving Service.
• [2024/01] Support for multi-model, multi-machine, multi-card inference services. For usage instructions, please refer to here
• [2024/01] Support PyTorch inference engine, developed entirely in Python, helping to lower the barriers for developers and enable rapid experimentation with new features and technologies.

2023

• [2023/12] Turbomind supports multimodal input. Gradio Demo
• [2023/11] Turbomind supports loading hf model directly. Click here for details.
• [2023/11] TurboMind major upgrades, including: Paged Attention, faster attention kernels without sequence length limitation, 2x faster KV8 kernels, Split-K decoding (Flash Decoding), and W4A16 inference for sm_75
• [2023/09] TurboMind supports Qwen-14B
• [2023/09] TurboMind supports InternLM-20B
• [2023/09] TurboMind supports all features of Code Llama: code completion, infilling, chat / instruct, and python specialist. Click here for deployment guide
• [2023/09] TurboMind supports Baichuan2-7B
• [2023/08] TurboMind supports flash-attention2.
• [2023/08] TurboMind supports Qwen-7B, dynamic NTK-RoPE scaling and dynamic logN scaling
• [2023/08] TurboMind supports Windows (tp=1)
• [2023/08] TurboMind supports 4-bit inference, 2.4x faster than FP16, the fastest open-source implementation. Check this guide for detailed info
• [2023/08] LMDeploy has launched on the HuggingFace Hub, providing ready-to-use 4-bit models.
• [2023/08] LMDeploy supports 4-bit quantization using the AWQ algorithm.
• [2023/07] TurboMind supports Llama-2 70B with GQA.
• [2023/07] TurboMind supports Llama-2 7B/13B.
• [2023/07] TurboMind supports tensor-parallel inference of InternLM.

---

Introduction

LMDeploy is a toolkit for compressing, deploying, and serving LLM, developed by the MMRazor and MMDeploy teams. It has the following core features:

• Efficient Inference: LMDeploy delivers up to 1.8x higher request throughput than vLLM, by introducing key features like persistent batch(a.k.a. continuous batching), blocked KV cache, dynamic split&fuse, tensor parallelism, high-performance CUDA kernels and so on.

• Effective Quantization: LMDeploy supports weight-only and k/v quantization, and the 4-bit inference performance is 2.4x higher than FP16. The quantization quality has been confirmed via OpenCompass evaluation.

• Effortless Distribution Server: Leveraging the request distribution service, LMDeploy facilitates an easy and efficient deployment of multi-model services across multiple machines and cards.

• Interactive Inference Mode: By caching the k/v of attention during multi-round dialogue processes, the engine remembers dialogue history, thus avoiding repetitive processing of historical sessions.

Performance

For detailed inference benchmarks in more devices and more settings, please refer to the following link:

• A100
• V100
• 4090
• 3090
• 2080

Supported Models

Model	Size
Llama	7B - 65B
Llama2	7B - 70B
InternLM	7B - 20B
InternLM2	7B - 20B
InternLM-XComposer	7B
QWen	7B - 72B
QWen-VL	7B
Baichuan	7B - 13B
Baichuan2	7B - 13B
Code Llama	7B - 34B
ChatGLM2	6B
Falcon	7B - 180B
YI	6B - 34B

LMDeploy has developed two inference engines - TurboMind and PyTorch, each with a different focus. The former strives for ultimate optimization of inference performance, while the latter, developed purely in Python, aims to decrease the barriers for developers.

They differ in the types of supported models and the inference data type. Please refer to this table for each engine's capability and choose the proper one that best fits your actual needs.

Quick Start

Installation

Install lmdeploy with pip ( python 3.8+) or from source

pip install lmdeploy

The default prebuilt package is compiled on CUDA 11.8. However, if CUDA 12+ is required, you can install lmdeploy by:

export LMDEPLOY_VERSION=0.2.0
export PYTHON_VERSION=38
pip install https://github.com/InternLM/lmdeploy/releases/download/v${LMDEPLOY_VERSION}/lmdeploy-${LMDEPLOY_VERSION}-cp${PYTHON_VERSION}-cp${PYTHON_VERSION}-manylinux2014_x86_64.whl

Offline Batch Inference

import lmdeploy
pipe = lmdeploy.pipeline("internlm/internlm-chat-7b")
response = pipe(["Hi, pls intro yourself", "Shanghai is"])
print(response)

[!NOTE] By default, LMDeploy downloads model from HuggingFace. If you would like to use models from ModelScope, please install ModelScope by pip install modelscope and set the environment variable:

export LMDEPLOY_USE_MODELSCOPE=True

For more information about inference pipeline, please refer to here.

Tutorials

Please overview getting_started section for the basic usage of LMDeploy.

For detailed user guides and advanced guides, please refer to our tutorials:

• User Guide
  • Inference pipeline
  • Inference Engine - TurboMind
  • Inference Engine - PyTorch
  • Serving
  • Quantization
• Advance Guide
  • Add chat template
  • Add a new model
  • gemm tuning
  • Long context inference
  • Multi-model inference service

Contributing

We appreciate all contributions to LMDeploy. Please refer to CONTRIBUTING.md for the contributing guideline.

Acknowledgement

• FasterTransformer
• llm-awq
• vLLM
• DeepSpeed-MII

License

This project is released under the Apache 2.0 license.