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# Colossal-AI
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<div id="top" align="center">
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   [![logo](https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/colossal-ai_logo_vertical.png)](https://www.colossalai.org/)
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   Colossal-AI: A Unified Deep Learning System for Big Model Era
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   <h3> <a href="https://arxiv.org/abs/2110.14883"> Paper </a> |
   <a href="https://www.colossalai.org/"> Documentation </a> |
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   <a href="https://github.com/hpcaitech/ColossalAI/tree/main/examples"> Examples </a> |
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   <a href="https://github.com/hpcaitech/ColossalAI/discussions"> Forum </a> |
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   <a href="https://medium.com/@hpcaitech"> Blog </a></h3>
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   [![Build](https://github.com/hpcaitech/ColossalAI/actions/workflows/build.yml/badge.svg)](https://github.com/hpcaitech/ColossalAI/actions/workflows/build.yml)
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   [![Documentation](https://readthedocs.org/projects/colossalai/badge/?version=latest)](https://colossalai.readthedocs.io/en/latest/?badge=latest)
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   [![CodeFactor](https://www.codefactor.io/repository/github/hpcaitech/colossalai/badge)](https://www.codefactor.io/repository/github/hpcaitech/colossalai)
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   [![HuggingFace badge](https://img.shields.io/badge/%F0%9F%A4%97HuggingFace-Join-yellow)](https://huggingface.co/hpcai-tech)
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   [![slack badge](https://img.shields.io/badge/Slack-join-blueviolet?logo=slack&amp)](https://join.slack.com/t/colossalaiworkspace/shared_invite/zt-z7b26eeb-CBp7jouvu~r0~lcFzX832w)
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   [![WeChat badge](https://img.shields.io/badge/微信-加入-green?logo=wechat&amp)](https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/WeChat.png)
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   | [English](README.md) | [中文](README-zh-Hans.md) |
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</div>
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## Latest News
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* [2023/01] [Hardware Savings Up to 46 Times for AIGC and  Automatic Parallelism](https://www.hpc-ai.tech/blog/colossal-ai-0-2-0)
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* [2022/11] [Diffusion Pretraining and Hardware Fine-Tuning Can Be Almost 7X Cheaper](https://www.hpc-ai.tech/blog/diffusion-pretraining-and-hardware-fine-tuning-can-be-almost-7x-cheaper)
* [2022/10] [Use a Laptop to Analyze 90% of Proteins, With a Single-GPU Inference Sequence Exceeding 10,000](https://www.hpc-ai.tech/blog/use-a-laptop-to-analyze-90-of-proteins-with-a-single-gpu-inference-sequence-exceeding)
* [2022/10] [Embedding Training With 1% GPU Memory and 100 Times Less Budget for Super-Large Recommendation Model](https://www.hpc-ai.tech/blog/embedding-training-with-1-gpu-memory-and-10-times-less-budget-an-open-source-solution-for)
* [2022/09] [HPC-AI Tech Completes $6 Million Seed and Angel Round Fundraising](https://www.hpc-ai.tech/blog/hpc-ai-tech-completes-6-million-seed-and-angel-round-fundraising-led-by-bluerun-ventures-in-the)
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## Table of Contents
<ul>
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 <li><a href="#Why-Colossal-AI">Why Colossal-AI</a> </li>
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 <li><a href="#Features">Features</a> </li>
 <li>
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   <a href="#Parallel-Training-Demo">Parallel Training Demo</a>
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   <ul>
     <li><a href="#GPT-3">GPT-3</a></li>
     <li><a href="#GPT-2">GPT-2</a></li>
     <li><a href="#BERT">BERT</a></li>
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     <li><a href="#PaLM">PaLM</a></li>
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     <li><a href="#OPT">OPT</a></li>
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     <li><a href="#ViT">ViT</a></li>
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     <li><a href="#Recommendation-System-Models">Recommendation System Models</a></li>
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   </ul>
 </li>
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 <li>
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   <a href="#Single-GPU-Training-Demo">Single GPU Training Demo</a>
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   <ul>
     <li><a href="#GPT-2-Single">GPT-2</a></li>
     <li><a href="#PaLM-Single">PaLM</a></li>
   </ul>
 </li>
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 <li>
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   <a href="#Inference-Energon-AI-Demo">Inference (Energon-AI) Demo</a>
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   <ul>
     <li><a href="#GPT-3-Inference">GPT-3</a></li>
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     <li><a href="#OPT-Serving">OPT-175B Online Serving for Text Generation</a></li>
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     <li><a href="#BLOOM-Inference">175B BLOOM</a></li>
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   </ul>
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 </li>
   <li>
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   <a href="#Colossal-AI-in-the-Real-World">Colossal-AI for Real World Applications</a>
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   <ul>
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     <li><a href="#AIGC">AIGC: Acceleration of Stable Diffusion</a></li>
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     <li><a href="#Biomedicine">Biomedicine: Acceleration of AlphaFold Protein Structure</a></li>
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   </ul>
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 </li>
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 <li>
   <a href="#Installation">Installation</a>
   <ul>
     <li><a href="#PyPI">PyPI</a></li>
     <li><a href="#Install-From-Source">Install From Source</a></li>
   </ul>
 </li>
 <li><a href="#Use-Docker">Use Docker</a></li>
 <li><a href="#Community">Community</a></li>
 <li><a href="#contributing">Contributing</a></li>
 <li><a href="#Cite-Us">Cite Us</a></li>
</ul>
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## Why Colossal-AI
<div align="center">
   <a href="https://youtu.be/KnXSfjqkKN0">
   <img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/JamesDemmel_Colossal-AI.png" width="600" />
   </a>

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   Prof. James Demmel (UC Berkeley): Colossal-AI makes training AI models efficient, easy, and scalable.
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</div>

<p align="right">(<a href="#top">back to top</a>)</p>

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## Features

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Colossal-AI provides a collection of parallel components for you. We aim to support you to write your
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distributed deep learning models just like how you write your model on your laptop. We provide user-friendly tools to kickstart
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distributed training and inference in a few lines.
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- Parallelism strategies
  - Data Parallelism
  - Pipeline Parallelism
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  - 1D, [2D](https://arxiv.org/abs/2104.05343), [2.5D](https://arxiv.org/abs/2105.14500), [3D](https://arxiv.org/abs/2105.14450) Tensor Parallelism
  - [Sequence Parallelism](https://arxiv.org/abs/2105.13120)
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  - [Zero Redundancy Optimizer (ZeRO)](https://arxiv.org/abs/1910.02054)
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  - [Auto-Parallelism](https://github.com/hpcaitech/ColossalAI/tree/main/examples/language/gpt/auto_parallel_with_gpt)
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- Heterogeneous Memory Management
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  - [PatrickStar](https://arxiv.org/abs/2108.05818)

- Friendly Usage
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  - Parallelism based on configuration file
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- Inference
  - [Energon-AI](https://github.com/hpcaitech/EnergonAI)

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- Colossal-AI in the Real World
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  - Biomedicine: [FastFold](https://github.com/hpcaitech/FastFold) accelerates training and inference of AlphaFold protein structure
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<p align="right">(<a href="#top">back to top</a>)</p>

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## Parallel Training Demo
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### GPT-3
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<p align="center">
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<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/GPT3-v5.png" width=700/>
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</p>
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- Save 50% GPU resources, and 10.7% acceleration
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### GPT-2
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<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/GPT2.png" width=800/>
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- 11x lower GPU memory consumption, and superlinear scaling efficiency with Tensor Parallelism
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<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/(updated)GPT-2.png" width=800>
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- 24x larger model size on the same hardware
- over 3x acceleration
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### BERT
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<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/BERT.png" width=800/>
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- 2x faster training, or 50% longer sequence length
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### PaLM
- [PaLM-colossalai](https://github.com/hpcaitech/PaLM-colossalai): Scalable implementation of Google's Pathways Language Model ([PaLM](https://ai.googleblog.com/2022/04/pathways-language-model-palm-scaling-to.html)).

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### OPT
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<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/OPT_update.png" width=800/>
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- [Open Pretrained Transformer (OPT)](https://github.com/facebookresearch/metaseq), a 175-Billion parameter AI language model released by Meta, which stimulates AI programmers to perform various downstream tasks and application deployments because public pretrained model weights.
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- 45% speedup fine-tuning OPT at low cost in lines. [[Example]](https://github.com/hpcaitech/ColossalAI-Examples/tree/main/language/opt) [[Online Serving]](https://github.com/hpcaitech/ColossalAI-Documentation/blob/main/i18n/en/docusaurus-plugin-content-docs/current/advanced_tutorials/opt_service.md)
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Please visit our [documentation](https://www.colossalai.org/) and [examples](https://github.com/hpcaitech/ColossalAI-Examples) for more details.
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### ViT
<p align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/ViT.png" width="450" />
</p>

- 14x larger batch size, and 5x faster training for Tensor Parallelism = 64

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### Recommendation System Models
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- [Cached Embedding](https://github.com/hpcaitech/CachedEmbedding), utilize software cache to train larger embedding tables with a smaller GPU memory budget.
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<p align="right">(<a href="#top">back to top</a>)</p>
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## Single GPU Training Demo
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### GPT-2
<p id="GPT-2-Single" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/GPT2-GPU1.png" width=450/>
</p>

- 20x larger model size on the same hardware

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<p id="GPT-2-NVME" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/GPT2-NVME.png" width=800/>
</p>

- 120x larger model size on the same hardware (RTX 3080)

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### PaLM
<p id="PaLM-Single" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/PaLM-GPU1.png" width=450/>
</p>

- 34x larger model size on the same hardware

<p align="right">(<a href="#top">back to top</a>)</p>

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## Inference (Energon-AI) Demo
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<p id="GPT-3-Inference" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/inference_GPT-3.jpg" width=800/>
</p>

- [Energon-AI](https://github.com/hpcaitech/EnergonAI): 50% inference acceleration on the same hardware

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<p id="OPT-Serving" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/OPT_serving.png" width=800/>
</p>

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- [OPT Serving](https://github.com/hpcaitech/ColossalAI-Documentation/blob/main/i18n/en/docusaurus-plugin-content-docs/current/advanced_tutorials/opt_service.md): Try 175-billion-parameter OPT online services for free, without any registration whatsoever.
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<p id="BLOOM-Inference" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/BLOOM%20Inference.PNG" width=800/>
</p>

- [BLOOM](https://github.com/hpcaitech/EnergonAI/tree/main/examples/bloom): Reduce hardware deployment costs of 175-billion-parameter BLOOM by more than 10 times.

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<p align="right">(<a href="#top">back to top</a>)</p>

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## Colossal-AI in the Real World

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### AIGC
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Acceleration of AIGC (AI-Generated Content) models such as [Stable Diffusion v1](https://github.com/CompVis/stable-diffusion) and [Stable Diffusion v2](https://github.com/Stability-AI/stablediffusion).
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<p id="diffusion_train" align="center">
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<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/Stable%20Diffusion%20v2.png" width=800/>
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</p>

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- [Training](https://github.com/hpcaitech/ColossalAI/tree/main/examples/images/diffusion): Reduce Stable Diffusion memory consumption by up to 5.6x and hardware cost by up to 46x (from A100 to RTX3060).
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<p id="diffusion_demo" align="center">
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<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/DreamBooth.png" width=800/>
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</p>

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- [DreamBooth Fine-tuning](https://github.com/hpcaitech/ColossalAI/tree/main/examples/images/dreambooth): Personalize your model using just 3-5 images of the desired subject.
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<p id="inference" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/Stable%20Diffusion%20Inference.jpg" width=800/>
</p>

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- [Inference](https://github.com/hpcaitech/ColossalAI/tree/main/examples/images/diffusion): Reduce inference GPU memory consumption by 2.5x.
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<p align="right">(<a href="#top">back to top</a>)</p>

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### Biomedicine
Acceleration of [AlphaFold Protein Structure](https://alphafold.ebi.ac.uk/)

<p id="FastFold" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/FastFold.jpg" width=800/>
</p>

- [FastFold](https://github.com/hpcaitech/FastFold): accelerating training and inference on GPU Clusters, faster data processing, inference sequence containing more than 10000 residues.

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<p id="xTrimoMultimer" align="center">
<img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/xTrimoMultimer_Table.jpg" width=800/>
</p>

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- [xTrimoMultimer](https://github.com/biomap-research/xTrimoMultimer): accelerating structure prediction of protein monomers and multimer by 11x.

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<p align="right">(<a href="#top">back to top</a>)</p>

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## Installation

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### Install from PyPI

You can easily install Colossal-AI with the following command. **By defualt, we do not build PyTorch extensions during installation.**

```bash
pip install colossalai
```

However, if you want to build the PyTorch extensions during installation, you can set `CUDA_EXT=1`.

```bash
CUDA_EXT=1 pip install colossalai
```

**Otherwise, CUDA kernels will be built during runtime when you actually need it.**

We also keep release the nightly version to PyPI on a weekly basis. This allows you to access the unreleased features and bug fixes in the main branch.
Installation can be made via

```bash
pip install colossalai-nightly
```

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### Download From Official Releases
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You can visit the [Download](https://www.colossalai.org/download) page to download Colossal-AI with pre-built PyTorch extensions.
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### Download From Source
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> The version of Colossal-AI will be in line with the main branch of the repository. Feel free to raise an issue if you encounter any problem. :)
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```shell
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git clone https://github.com/hpcaitech/ColossalAI.git
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cd ColossalAI
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# install colossalai
pip install .
```

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By default, we do not compile CUDA/C++ kernels. ColossalAI will build them during runtime.
If you want to install and enable CUDA kernel fusion (compulsory installation when using fused optimizer):
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```shell
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CUDA_EXT=1 pip install .
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```

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<p align="right">(<a href="#top">back to top</a>)</p>
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## Use Docker

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### Pull from DockerHub

You can directly pull the docker image from our [DockerHub page](https://hub.docker.com/r/hpcaitech/colossalai). The image is automatically uploaded upon release.


### Build On Your Own

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Run the following command to build a docker image from Dockerfile provided.

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> Building Colossal-AI from scratch requires GPU support, you need to use Nvidia Docker Runtime as the default when doing `docker build`. More details can be found [here](https://stackoverflow.com/questions/59691207/docker-build-with-nvidia-runtime).
> We recommend you install Colossal-AI from our [project page](https://www.colossalai.org) directly.

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```bash
cd ColossalAI
docker build -t colossalai ./docker
```

Run the following command to start the docker container in interactive mode.

```bash
docker run -ti --gpus all --rm --ipc=host colossalai bash
```

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<p align="right">(<a href="#top">back to top</a>)</p>
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## Community

Join the Colossal-AI community on [Forum](https://github.com/hpcaitech/ColossalAI/discussions),
[Slack](https://join.slack.com/t/colossalaiworkspace/shared_invite/zt-z7b26eeb-CBp7jouvu~r0~lcFzX832w),
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and [WeChat](https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/WeChat.png "qrcode") to share your suggestions, feedback, and questions with our engineering team.
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## Contributing

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If you wish to contribute to this project, please follow the guideline in [Contributing](./CONTRIBUTING.md).

Thanks so much to all of our amazing contributors!
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<a href="https://github.com/hpcaitech/ColossalAI/graphs/contributors"><img src="https://raw.githubusercontent.com/hpcaitech/public_assets/main/colossalai/img/contributor_avatar.png" width="800px"></a>

*The order of contributor avatars is randomly shuffled.*
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<p align="right">(<a href="#top">back to top</a>)</p>

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## CI/CD

We leverage the power of [GitHub Actions](https://github.com/features/actions) to automate our development, release and deployment workflows. Please check out this [documentation](.github/workflows/README.md) on how the automated workflows are operated.


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## Cite Us
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```
@article{bian2021colossal,
  title={Colossal-AI: A Unified Deep Learning System For Large-Scale Parallel Training},
  author={Bian, Zhengda and Liu, Hongxin and Wang, Boxiang and Huang, Haichen and Li, Yongbin and Wang, Chuanrui and Cui, Fan and You, Yang},
  journal={arXiv preprint arXiv:2110.14883},
  year={2021}
}
```
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Colossal-AI has been accepted as official tutorials by top conference [SC](https://sc22.supercomputing.org/), [AAAI](https://aaai.org/Conferences/AAAI-23/), [PPoPP](https://ppopp23.sigplan.org/), etc.

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