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https://github.com/huggingface/transformers-bloom-inference

Fast Inference Solutions for BLOOM
https://github.com/huggingface/transformers-bloom-inference

bloom huggingface-transformers nlp pytorch

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Fast Inference Solutions for BLOOM

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# Fast Inference Solutions for BLOOM



This repo provides demos and packages to perform fast inference solutions for BLOOM. Some of the solutions have their own repos in which case a link to the [corresponding repos](#Other-inference-solutions) is provided instead.



# Inference solutions for BLOOM 176B



We support HuggingFace accelerate and DeepSpeed Inference for generation.



Install required packages:



```shell

pip install flask flask_api gunicorn pydantic accelerate huggingface_hub>=0.9.0 deepspeed>=0.7.3 deepspeed-mii==0.0.2

```



alternatively you can also install deepspeed from source:

```shell

git clone https://github.com/microsoft/DeepSpeed

cd DeepSpeed

CFLAGS="-I$CONDA_PREFIX/include/" LDFLAGS="-L$CONDA_PREFIX/lib/" TORCH_CUDA_ARCH_LIST="7.0" DS_BUILD_CPU_ADAM=1 DS_BUILD_AIO=1 DS_BUILD_UTILS=1 pip install -e . --global-option="build_ext" --global-option="-j8" --no-cache -v --disable-pip-version-check

```



All the provided scripts are tested on 8 A100 80GB GPUs for BLOOM 176B (fp16/bf16) and 4 A100 80GB GPUs for BLOOM 176B (int8). These scripts might not work for other models or a different number of GPUs.



DS inference is deployed using logic borrowed from DeepSpeed MII library.



Note: Sometimes GPU memory is not freed when DS inference deployment crashes. You can free this memory by running `killall python` in terminal.



For using BLOOM quantized, use dtype = int8. Also, change the model_name to microsoft/bloom-deepspeed-inference-int8 for DeepSpeed-Inference. For HF accelerate, no change is needed for model_name.



HF accelerate uses [LLM.int8()](https://arxiv.org/abs/2208.07339) and DS-inference uses [ZeroQuant](https://arxiv.org/abs/2206.01861) for post-training quantization.



## BLOOM inference via command-line



This asks for generate_kwargs everytime.

Example: generate_kwargs =

```json

{"min_length": 100, "max_new_tokens": 100, "do_sample": false}

```



1. using HF accelerate

```shell

python -m inference_server.cli --model_name bigscience/bloom --model_class AutoModelForCausalLM --dtype bf16 --deployment_framework hf_accelerate --generate_kwargs '{"min_length": 100, "max_new_tokens": 100, "do_sample": false}'

```



2. using DS inference

```shell

python -m inference_server.cli --model_name microsoft/bloom-deepspeed-inference-fp16 --model_class AutoModelForCausalLM --dtype fp16 --deployment_framework ds_inference --generate_kwargs '{"min_length": 100, "max_new_tokens": 100, "do_sample": false}'

```



## BLOOM server deployment



[make ](../Makefile) can be used to launch a generation server. Please note that the serving method is synchronous and users have to wait in queue until the preceding requests have been processed. An example to fire server requests is given [here](./server_request.py). Alternativey, a [Dockerfile](./Dockerfile) is also provided which launches a generation server on port 5000.



An interactive UI can be launched via the following command to connect to the generation server. The default URL of the UI is `http://127.0.0.1:5001/`. The `model_name` is just used by the UI to check if the model is decoder or encoder-decoder model.

```shell

python -m ui --model_name bigscience/bloom

```

This command launches the following UI to play with generation. Sorry for the crappy design. Unfotunately, my UI skills only go so far. 😅😅😅

![image](assets/UI.png)



## Benchmark system for BLOOM inference



1. using HF accelerate

```shell

python -m inference_server.benchmark --model_name bigscience/bloom --model_class AutoModelForCausalLM --dtype bf16 --deployment_framework hf_accelerate --benchmark_cycles 5

```



2. using DS inference

```shell

deepspeed --num_gpus 8 --module inference_server.benchmark --model_name bigscience/bloom --model_class AutoModelForCausalLM --dtype fp16 --deployment_framework ds_inference --benchmark_cycles 5

```

alternatively, to load model faster:

```shell

deepspeed --num_gpus 8 --module inference_server.benchmark --model_name microsoft/bloom-deepspeed-inference-fp16 --model_class AutoModelForCausalLM --dtype fp16 --deployment_framework ds_inference --benchmark_cycles 5

```



3. using DS ZeRO

```shell

deepspeed --num_gpus 8 --module inference_server.benchmark --model_name bigscience/bloom --model_class AutoModelForCausalLM --dtype bf16 --deployment_framework ds_zero --benchmark_cycles 5

```



# Support



If you run into things not working or have other questions please open an Issue in the corresponding backend:



- [Accelerate](https://github.com/huggingface/accelerate/issues)

- [Deepspeed-Inference](https://github.com/microsoft/DeepSpeed/issues)

- [Deepspeed-ZeRO](https://github.com/microsoft/DeepSpeed/issues)



If there a specific issue with one of the scripts and not the backend only then please open an Issue here and tag [@mayank31398](https://github.com/mayank31398).



# Other inference solutions

## Client-side solutions



Solutions developed to perform large batch inference locally:



* [Custom HF Code](https://github.com/huggingface/transformers_bloom_parallel/).



JAX:



* [BLOOM Inference in JAX](https://github.com/huggingface/bloom-jax-inference)



## Server solutions



A solution developed to be used in a server mode (i.e. varied batch size, varied request rate) can be found [here](https://github.com/Narsil/bloomserver). This is implemented in Rust.