249 lines
9.2 KiB
Markdown
249 lines
9.2 KiB
Markdown
<div align="center">
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<a href="https://www.youtube.com/watch?v=jlMAX2Oaht0">
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<img width=560 width=315 alt="Making TGI deployment optimal" src="https://huggingface.co/datasets/Narsil/tgi_assets/resolve/main/thumbnail.png">
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</a>
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# Text Generation Inference
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<a href="https://github.com/huggingface/text-generation-inference">
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<img alt="GitHub Repo stars" src="https://img.shields.io/github/stars/huggingface/text-generation-inference?style=social">
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</a>
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<a href="https://huggingface.github.io/text-generation-inference">
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<img alt="Swagger API documentation" src="https://img.shields.io/badge/API-Swagger-informational">
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</a>
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A Rust, Python and gRPC server for text generation inference. Used in production at [HuggingFace](https://huggingface.co)
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to power Hugging Chat, the Inference API and Inference Endpoint.
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</div>
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## Table of contents
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- [Get Started](#get-started)
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- [API Documentation](#api-documentation)
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- [Using a private or gated model](#using-a-private-or-gated-model)
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- [A note on Shared Memory](#a-note-on-shared-memory-shm)
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- [Distributed Tracing](#distributed-tracing)
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- [Local Install](#local-install)
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- [CUDA Kernels](#cuda-kernels)
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- [Optimized architectures](#optimized-architectures)
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- [Run Falcon](#run-falcon)
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- [Run](#run)
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- [Quantization](#quantization)
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- [Develop](#develop)
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- [Testing](#testing)
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Text Generation Inference (TGI) is a toolkit for deploying and serving Large Language Models (LLMs). TGI enables high-performance text generation for the most popular open-source LLMs, including Llama, Falcon, StarCoder, BLOOM, GPT-NeoX, and [more](https://huggingface.co/docs/text-generation-inference/supported_models). TGI implements many features, such as:
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- Simple launcher to serve most popular LLMs
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- Production ready (distributed tracing with Open Telemetry, Prometheus metrics)
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- Tensor Parallelism for faster inference on multiple GPUs
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- Token streaming using Server-Sent Events (SSE)
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- Continuous batching of incoming requests for increased total throughput
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- Optimized transformers code for inference using [Flash Attention](https://github.com/HazyResearch/flash-attention) and [Paged Attention](https://github.com/vllm-project/vllm) on the most popular architectures
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- Quantization with [bitsandbytes](https://github.com/TimDettmers/bitsandbytes) and [GPT-Q](https://arxiv.org/abs/2210.17323)
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- [Safetensors](https://github.com/huggingface/safetensors) weight loading
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- Watermarking with [A Watermark for Large Language Models](https://arxiv.org/abs/2301.10226)
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- Logits warper (temperature scaling, top-p, top-k, repetition penalty, more details see [transformers.LogitsProcessor](https://huggingface.co/docs/transformers/internal/generation_utils#transformers.LogitsProcessor))
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- Stop sequences
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- Log probabilities
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- Custom Prompt Generation: Easily generate text by providing custom prompts to guide the model's output
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- Fine-tuning Support: Utilize fine-tuned models for specific tasks to achieve higher accuracy and performance
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## Get Started
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### Docker
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For a detailed starting guide, please see the [Quick Tour](https://huggingface.co/docs/text-generation-inference/quicktour). The easiest way of getting started is using the official Docker container:
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```shell
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model=HuggingFaceH4/zephyr-7b-beta
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volume=$PWD/data # share a volume with the Docker container to avoid downloading weights every run
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docker run --gpus all --shm-size 1g -p 8080:80 -v $volume:/data ghcr.io/huggingface/text-generation-inference:1.1.1 --model-id $model
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```
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And then you can make requests like
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```bash
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curl 127.0.0.1:8080/generate \
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-X POST \
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-d '{"inputs":"What is Deep Learning?","parameters":{"max_new_tokens":20}}' \
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-H 'Content-Type: application/json'
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```
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**Note:** To use GPUs, you need to install the [NVIDIA Container Toolkit](https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/install-guide.html). We also recommend using NVIDIA drivers with CUDA version 11.8 or higher. For running the Docker container on a machine with no GPUs or CUDA support, it is enough to remove the `--gpus all` flag and add `--disable-custom-kernels`, please note CPU is not the intended platform for this project, so performance might be subpar.
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To see all options to serve your models (in the [code](https://github.com/huggingface/text-generation-inference/blob/main/launcher/src/main.rs) or in the cli):
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```
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text-generation-launcher --help
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```
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### API documentation
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You can consult the OpenAPI documentation of the `text-generation-inference` REST API using the `/docs` route.
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The Swagger UI is also available at: [https://huggingface.github.io/text-generation-inference](https://huggingface.github.io/text-generation-inference).
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### Using a private or gated model
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You have the option to utilize the `HUGGING_FACE_HUB_TOKEN` environment variable for configuring the token employed by
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`text-generation-inference`. This allows you to gain access to protected resources.
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For example, if you want to serve the gated Llama V2 model variants:
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1. Go to https://huggingface.co/settings/tokens
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2. Copy your cli READ token
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3. Export `HUGGING_FACE_HUB_TOKEN=<your cli READ token>`
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or with Docker:
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```shell
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model=meta-llama/Llama-2-7b-chat-hf
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volume=$PWD/data # share a volume with the Docker container to avoid downloading weights every run
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token=<your cli READ token>
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docker run --gpus all --shm-size 1g -e HUGGING_FACE_HUB_TOKEN=$token -p 8080:80 -v $volume:/data ghcr.io/huggingface/text-generation-inference:1.1.1 --model-id $model
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```
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### A note on Shared Memory (shm)
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[`NCCL`](https://docs.nvidia.com/deeplearning/nccl/user-guide/docs/index.html) is a communication framework used by
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`PyTorch` to do distributed training/inference. `text-generation-inference` make
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use of `NCCL` to enable Tensor Parallelism to dramatically speed up inference for large language models.
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In order to share data between the different devices of a `NCCL` group, `NCCL` might fall back to using the host memory if
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peer-to-peer using NVLink or PCI is not possible.
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To allow the container to use 1G of Shared Memory and support SHM sharing, we add `--shm-size 1g` on the above command.
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If you are running `text-generation-inference` inside `Kubernetes`. You can also add Shared Memory to the container by
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creating a volume with:
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```yaml
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- name: shm
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emptyDir:
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medium: Memory
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sizeLimit: 1Gi
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```
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and mounting it to `/dev/shm`.
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Finally, you can also disable SHM sharing by using the `NCCL_SHM_DISABLE=1` environment variable. However, note that
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this will impact performance.
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### Distributed Tracing
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`text-generation-inference` is instrumented with distributed tracing using OpenTelemetry. You can use this feature
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by setting the address to an OTLP collector with the `--otlp-endpoint` argument.
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### Architecture
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### Local install
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You can also opt to install `text-generation-inference` locally.
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First [install Rust](https://rustup.rs/) and create a Python virtual environment with at least
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Python 3.9, e.g. using `conda`:
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```shell
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curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
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conda create -n text-generation-inference python=3.9
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conda activate text-generation-inference
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```
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You may also need to install Protoc.
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On Linux:
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```shell
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PROTOC_ZIP=protoc-21.12-linux-x86_64.zip
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curl -OL https://github.com/protocolbuffers/protobuf/releases/download/v21.12/$PROTOC_ZIP
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sudo unzip -o $PROTOC_ZIP -d /usr/local bin/protoc
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sudo unzip -o $PROTOC_ZIP -d /usr/local 'include/*'
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rm -f $PROTOC_ZIP
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```
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On MacOS, using Homebrew:
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```shell
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brew install protobuf
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```
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Then run:
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```shell
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BUILD_EXTENSIONS=True make install # Install repository and HF/transformer fork with CUDA kernels
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make run-falcon-7b-instruct
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```
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**Note:** on some machines, you may also need the OpenSSL libraries and gcc. On Linux machines, run:
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```shell
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sudo apt-get install libssl-dev gcc -y
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```
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### CUDA Kernels
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The custom CUDA kernels are only tested on NVIDIA A100s. If you have any installation or runtime issues, you can remove
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the kernels by using the `DISABLE_CUSTOM_KERNELS=True` environment variable.
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Be aware that the official Docker image has them enabled by default.
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## Optimized architectures
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TGI works out of the box to serve optimized models in [this list](https://huggingface.co/docs/text-generation-inference/supported_models).
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Other architectures are supported on a best-effort basis using:
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`AutoModelForCausalLM.from_pretrained(<model>, device_map="auto")`
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or
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`AutoModelForSeq2SeqLM.from_pretrained(<model>, device_map="auto")`
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## Run Falcon
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### Run
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```shell
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make run-falcon-7b-instruct
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```
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### Quantization
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You can also quantize the weights with bitsandbytes to reduce the VRAM requirement:
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```shell
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make run-falcon-7b-instruct-quantize
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```
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4bit quantization is available using the [NF4 and FP4 data types from bitsandbytes](https://arxiv.org/pdf/2305.14314.pdf). It can be enabled by providing `--quantize bitsandbytes-nf4` or `--quantize bitsandbytes-fp4` as a command line argument to `text-generation-launcher`.
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## Develop
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```shell
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make server-dev
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make router-dev
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```
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## Testing
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```shell
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# python
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make python-server-tests
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make python-client-tests
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# or both server and client tests
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make python-tests
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# rust cargo tests
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make rust-tests
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# integration tests
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make integration-tests
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```
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