This repository records EleutherAI's work-in-progress for training large-scale language models on GPUs. Our current framework is based on NVIDIA's Megatron Language Model and has been augmented with techniques from DeepSpeed as well as some novel optimizations.
We aim to make this repo a centralized and accessible place to gather techniques for training large-scale autoregressive language models, and accelerate research into large-scale training. Additionally, we hope to train and open source a 175B parameter GPT-3 replication along the way. Please note, however, that this is a research codebase that is primarily designed for performance over ease of use. We endeavour to make it as easy to use as is feasible, but if there's anything in the readme that is unclear or you think you've found a bug, please open an issue.
If you are interested in contributing, please join our Discord and head to the #gpt-neox
channel. We're working with cloud compute provider CoreWeave for training, and hope to release the weights of smaller models as we progress up to 175B parameters.
For those looking for a TPU-centric codebase, we recommend Mesh Transformer JAX.
- Pretrained Models
- Quick Start
- Configuration
- Datasets
- Training and Finetuning
- Inference
- Evaluation
- Monitoring
- Administrative Notes
GPT-NeoX-20B is a 20 billion parameter autoregressive language model trained on the Pile. Technical details about GPT-NeoX-20B can be found in the associated paper. The configuration file for this model is both available at ./configs/20B.yml
and included in the download links below.
Slim weights - (No optimizer states, for inference or finetuning, 39GB)
To download from the command line to a folder named 20B_checkpoints
, use the following command:
wget --cut-dirs=5 -nH -r --no-parent --reject "index.html*" https://the-eye.eu/public/AI/models/GPT-NeoX-20B/slim_weights/ -P 20B_checkpoints
Full weights - (Including optimizer states, 268GB)
To download from the command line to a folder named 20B_checkpoints
, use the following command:
wget --cut-dirs=5 -nH -r --no-parent --reject "index.html*" https://the-eye.eu/public/AI/models/GPT-NeoX-20B/full_weights/ -P 20B_checkpoints
Weights can be alternatively be downloaded using a BitTorrent client. Torrent files can be downloaded here: slim weights, full weights.
We additionally have 150 checkpoints saved throughout training, one every 1,000 steps. We are working on figuring out how to best serve these at scale, but in the meanwhile people interested in working with the partially trained checkpoints can email us at contact@eleuther.ai to arrange access.
First make sure you are in an environment with Python 3.8 or later with an appropriate version of PyTorch 1.8 or later installed.
To install the remaining basic dependencies, run:
pip install -r requirements/requirements.txt
python ./megatron/fused_kernels/setup.py install # optional if not using fused kernels
from the repository root.
Warning: Our codebase relies on DeeperSpeed, our fork of the DeepSpeed library with some added changes. We strongly recommend using Anaconda, a virtual machine, or some other form of environment isolation before continuing. Failure to do so may cause other repositories that rely on DeepSpeed to break.
We also provide a Dockerfile if you prefer to run NeoX in a container. To use this option, first build an image named gpt-neox
from the repository root directory with docker build -t gpt-neox -f Dockerfile .
. We also host pre-built images on Docker Hub at leogao2/gpt-neox
.
You can then run a container based on this image. For instance, the below snippet mounts the cloned repository (gpt-neox
) directory to /gpt-neox
in the container and uses nvidia-docker to make four GPUs (numbers 0-3) accessible to the container. As noted by the NCCL documentation, both --shm-size=1g
and --ulimit memlock=-1
are important to prevent Docker from allocating too little shared memory.
nvidia-docker run --rm -it -e NVIDIA_VISIBLE_DEVICES=0,1,2,3 --shm-size=1g --ulimit memlock=-1 --mount type=bind,src=$PWD,dst=/gpt-neox gpt-neox
GPT-NeoX-20B (currently the only pretrained model we provide) is a very large model. The weights alone take up around 40GB in GPU memory and, due to the tensor parallelism scheme as well as the high memory usage, you will need at minimum 2 GPUs with a total of ~45GB of GPU VRAM to run inference, and significantly more for training. Unfortunately the model is not yet possible to use on a single consumer GPU.
GPT-NeoX parameters are defined in a YAML configuration file which is passed to the deepy.py
launcher. For more details on the configuration file, see Configuration. The configuration file for GPT-NeoX-20B is at ./configs/20B.yml
- but you may need to edit some fields to specify where your model and tokenizer are saved. In the config file edit the following fields:
"vocab-file": "./20B_checkpoints/20B_tokenizer.json",
"save": "./20B_checkpoints",
"load": "./20B_checkpoints",
changing ./20B_checkpoints
to the path to the root folder of the downloaded checkpoints. If the checkpoints exist at ./20B_checkpoints
you can leave this as is.
Depending on the number of GPUs you're using, you may also need to change the parallelism settings. To run inference on the 20B model on 2 GPUs, change:
"pipe-parallel-size": 4,
to:
"pipe-parallel-size": 1,
If you're using 8 GPUs, you can leave this unchanged.
All functionality (inference included), should be launched in parallel using deepy.py
, a wrapper around the deepspeed
launcher.
We currently offer three main functions:
train.py
is used for training and finetuning models.evaluate.py
is used to evaluate a trained model using the language model evaluation harness.generate.py
is used to sample text from a trained model.
and can be launched with:
./deepy.py [script.py] [./path/to/config_1.yml] [./path/to/config_2.yml] ... [./path/to/config_n.yml]
E.G To generate text unconditionally with the GPT-NeoX-20B model, you can use the following:
./deepy.py generate.py ./configs/20B.yml
Or optionally pass in a text file (e.g prompt.txt
) to use as the prompt, which should be a plain .txt
file with each prompt separated by newline characters, also passing in the path to an output file.
./deepy.py generate.py ./configs/20B.yml -i prompt.txt -o sample_outputs.txt
To reproduce our evaluation numbers on, for example, lambada and PIQA use:
./deepy.py evaluate.py ./configs/20B.yml --eval_tasks lambada piqa
You can add an arbitrary list of evaluation tasks here, for details of all tasks available, see lm-evaluation-harness.
For more details on each entry point, see the Training and Finetuning, Inference and Evaluation sections.
We provide a simple script for merging the 20B checkpoints to be run on a single GPU. First, download the slim weights from above, and run the following script:
python tools/merge20b.py --input_dir ./20B_checkpoints --output_dir ./20B_checkpoints_merged
As an alternative, you can also use Minimal GPT-NeoX-20B implementation, which runs and pure PyTorch on a single GPU, and does not require DeepSpeed.
GPT-NeoX parameters are defined in a YAML configuration file which is passed to the deepy.py launcher. We have provided some example .yaml files in configs, including one for GPT-NeoX-20B, and example configuration files for other model sizes.
These files are generally complete, but non-optimal. For example, depending on your specific GPU configuration, you may need to change some settings such as pipe-parallel-size
, model-parallel-size
to increase or decrease the degree of parallelisation, train_micro_batch_size_per_gpu
or gradient-accumulation-steps
to modify batch size related settings, or the zero_optimization
dict to modify how optimizer states are parallelised across workers.
For a more detailed guide to all the features available and how to configure them, see the configuration README, and for documentation of every possible argument, see configs/neox_arguments.md.
Several preconfigured datasets are available, including most components from the Pile, as well as the Pile train set itself, for straightforward tokenization using the prepare_data.py
entry point.
E.G, to download and tokenize the Enron emails corpus with the GPT2 Tokenizer, saving them to ./data
you can run:
python prepare_data.py -d ./data
or with the GPT-NeoX-20B tokenizer (assuming you have it saved at ./20B_checkpoints/20B_tokenizer.json
):
python prepare_data.py -d ./data -t HFTokenizer --vocab-file ./20B_checkpoints/20B_tokenizer.json
The tokenized data will be saved out to two files: [data-dir]/[dataset-name]/[dataset-name]_text_document.bin
and [data-dir]/[dataset-name]/[dataset-name]_text_document.idx
. You will need to add the prefix that both these files share to your training configuration file under the data-path
field. E.G:
"data-path": "./data/enron/enron_text_document",
To prepare your own dataset for training with custom data, format it as one large jsonl-formatted file with each item in the list of dictionaries being a separate document. The document text should be grouped under one JSON key, i.e "text"
. Any auxiliary data stored in other fields will not be
Next make sure to download the GPT2 tokenizer vocab, and merge files from the following links:
- Vocab: https://s3.amazonaws.com/models.huggingface.co/bert/gpt2-vocab.json
- Merge: https://s3.amazonaws.com/models.huggingface.co/bert/gpt2-merges.txt
Or use the 20B tokenizer (for which only a single Vocab file is needed):
(alternatively, you can provide any tokenizer file that can be loaded by Huggingface's tokenizers library with the Tokenizer.from_pretrained()
command)
You can now pretokenize your data using tools/preprocess_data.py
, the arguments for which are detailed below:
usage: preprocess_data.py [-h] --input INPUT [--jsonl-keys JSONL_KEYS [JSONL_KEYS ...]] [--num-docs NUM_DOCS] --tokenizer-type {HFGPT2Tokenizer,HFTokenizer,GPT2BPETokenizer,CharLevelTokenizer} [--vocab-file VOCAB_FILE] [--merge-file MERGE_FILE] [--append-eod] [--ftfy] --output-prefix OUTPUT_PREFIX
[--dataset-impl {lazy,cached,mmap}] [--workers WORKERS] [--log-interval LOG_INTERVAL]
optional arguments:
-h, --help show this help message and exit
input data:
--input INPUT Path to input jsonl files or lmd archive(s) - if using multiple archives, put them in a comma separated list
--jsonl-keys JSONL_KEYS [JSONL_KEYS ...]
space separate listed of keys to extract from jsonl. Defa
--num-docs NUM_DOCS Optional: Number of documents in the input data (if known) for an accurate progress bar.
tokenizer:
--tokenizer-type {HFGPT2Tokenizer,HFTokenizer,GPT2BPETokenizer,CharLevelTokenizer}
What type of tokenizer to use.
--vocab-file VOCAB_FILE
Path to the vocab file
--merge-file MERGE_FILE
Path to the BPE merge file (if necessary).
--append-eod Append an <eod> token to the end of a document.
--ftfy Use ftfy to clean text
output data:
--output-prefix OUTPUT_PREFIX
Path to binary output file without suffix
--dataset-impl {lazy,cached,mmap}
Dataset implementation to use. Default: mmap
runtime:
--workers WORKERS Number of worker processes to launch
--log-interval LOG_INTERVAL
Interval between progress updates
For example:
python tools/preprocess_data.py \
--input ./data/mydataset.jsonl.zst \
--output-prefix ./data/mydataset \
--vocab ./data/gpt2-vocab.json \
--merge-file gpt2-merges.txt \
--dataset-impl mmap \
--tokenizer-type GPT2BPETokenizer \
--append-eod
You would then run training with the following settings added to your configuration file:
"data-path": "data/mydataset/mydataset",
Training is launched using deepy.py
, a wrapper around DeepSpeed's launcher, which launches the same script in parallel across many GPUs / nodes.
The general usage pattern is:
python ./deepy.py train.py [path/to/config1.yml] [path/to/config2.yml] ...
You can pass in an arbitrary number of configs which will all be merged at runtime.
You can also optionally pass in a config prefix, which will assume all your configs are in the same folder and append that prefix to their path.
E.G:
python ./deepy.py train.py -d configs small.yml local_setup.yml
This will deploy the train.py
script on all nodes with one process per GPU. The worker nodes and number of GPUs are specified in the /job/hostfile
file (see parameter documentation), or can simply be passed in as the num_gpus
arg if running on a single node setup.
Although this is not strictly necessary, we find it useful to define the model parameters in one config file (e.g configs/small.yml
) and the data path parameters in another (e.g configs/local_setup.yml
).
We support three types of generation from a pretrained model:
- Unconditional generation
- Conditional generation based on an input read from a file
- Interactive generation, which allows for multiple rounds of back-and-forth between a user and the language model via a command line interface
All three types of text generation can be launched via python ./deepy.py generate.py -d configs small.yml local_setup.yml text_generation.yml
with the appropriate values set in configs/text_generation.yml
.
Preferred Machine on vast ai: 2X RTX3090
with minimum 200GB storage
If you want to use more GPUs inference e.g., you need to update settings in the config/20B.yml
for variable "pipe-parallel-size": 1
to 2.
- On
vast.ai
create instance section, selectpytorch/pytorch
as base image and use1.12.0-cuda11.3-cudnn8-devel
tag for container image. - Expose a port using this flag
-p 8085:8085
. Port could be anything but it has to match with theapp.py
server config at the last line. - Select Run interactive shell server, SSH. as launch mode and select the Use direct SSH connection checkbox below.
- Copy deployment script from
deployment_script.sh
and paste into On-start script and save these settings. - Rent a machine and wait for the script to complete environment setup. It takes between half to one-hour depending on the bandwidth of the vast ai instance.
- The logs for the setup script can be seen inside the container at location
/workspace/onstart.log
.tail
command can he used to view the latest logs.
Follow the same steps from 1 to 3 from Method 1 above
- Instead of copy-pasting the
deployment_script.sh
, create container with the settings selected and empty values at On-start script ssh
into the vast ai instance and create a file calleddeployment_script.sh
anywhere inside the container using commmandtouch deployment_script.sh
.- Change permissions of script using command
chmod +x deployment_script.sh
and run it using commandbash deployment_script.sh
Use a POST
request with following payload structure to generate text from vast ai
{
"prompts": ["This is first prompt.", "This is Second prompt."]
}
GPT-NeoX supports evaluation on downstream tasks through the language model evaluation harness.
To evaluate a trained model on the evaluation harness, simply run:
python ./deepy.py evaluate.py -d configs your_configs.yml --eval_tasks task1 task2 ... taskn
where --eval_tasks
is a list of evaluation tasks followed by spaces, e.g --eval_tasks lambada hellaswag piqa sciq
. For details of all tasks available, refer to the lm-evaluation-harness repo.
In addition to storing logs locally, we provide built-in support for two popular experiment monitoring frameworks: Weights & Biases and TensorBoard
EleutherAI is currently using Weights & Biases to record our experiments. If you are logged into Weights & Biases on your machine—you can do this by executing wandb login
—your runs will automatically be recorded. There are two optional fields associated with Weights & Biases: wandb_group
allows you to name the run group and wandb_team
allows you to assign your runs to an organization or team account.
We also support using TensorBoard via the tensorboard-dir
field. Dependencies required for TensorBoard monitoring can be found in and installed from ./requirements/requirements-tensorboard.txt
.
If you have found the GPT-NeoX library helpful in your work, you can cite this repository as
@software{gpt-neox-library,
title = {{GPT-NeoX: Large Scale Autoregressive Language Modeling in PyTorch}},
author = {Andonian, Alex and Anthony, Quentin and Biderman, Stella and Black, Sid and Gali, Preetham and Gao, Leo and Hallahan, Eric and Levy-Kramer, Josh and Leahy, Connor and Nestler, Lucas and Parker, Kip and Pieler, Michael and Purohit, Shivanshu and Songz, Tri and Phil, Wang and Weinbach, Samuel},
url = {https://www.github.com/eleutherai/gpt-neox},
doi = {10.5281/zenodo.5879544},
month = {8},
year = {2021},
version = {0.0.1},
}
To cite our 20 billion parameter model, please use
@inproceedings{gpt-neox-20b,
title={{GPT-NeoX-20B}: An Open-Source Autoregressive Language Model},
author={Black, Sid and Biderman, Stella and Hallahan, Eric and Anthony, Quentin and Gao, Leo and Golding, Laurence and He, Horace and Leahy, Connor and McDonell, Kyle and Phang, Jason and Pieler, Michael and Prashanth, USVSN Sai and Purohit, Shivanshu and Reynolds, Laria and Tow, Jonathan and Wang, Ben and Weinbach, Samuel},
booktitle={Proceedings of the ACL Workshop on Challenges \& Perspectives in Creating Large Language Models},
url={https://arxiv.org/abs/2204.06745},
year={2022}
}
This repository hosts code that is part of EleutherAI's GPT-NeoX project. Copyright © 2021, EleutherAI contributors (in alphabetical order): Alex Andonian, Quentin Anthony, Stella Biderman, Sid Black, Preetham Gali, Leo Gao, Eric Hallahan, Josh Levy-Kramer, Connor Leahy, Lucas Nestler, Kip Parker, Michael Pieler, Shivanshu Purohit, Tri Songz, Phil Wang, Samuel Weinbach. Licensed under the Apache License:
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
This repository is based off code written by NVIDIA that is licensed under the Apache License, Version 2.0. In accordance with the Apache License, all files that are modifications of code originally written by NVIDIA maintain a NVIDIA copyright header. All files that do not contain such a header are original to EleutherAI contributors. When the NVIDIA code has been modified from its original version, that fact is noted in the copyright header. All derivative works of this repository must preserve these headers under the terms of the Apache License.
For full terms, see the LICENSE
file. If you have any questions, comments, or concerns about licensing please email us at contact@eleuther.ai.
The following publications have come out of this project:
- Black, Biderman, Hallahan, Anthony, Gao, Golding, He, Leahy, McDonell, Phang, Pieler, Prashanth, Purohit, Reynolds, Tow, Wang, and Weinbach. "GPT-NeoX-20B: An Open-Source Autoregressive Language Model." In Proceedings of the ACL Workshop on Challenges & Perspectives in Creating Large Language Models. 2022.s
The following publications by other research groups use this library:
- Chi, Fan, Ramadge, and Rudnicky. "KERPLE: Kernelized Relative Positional Embedding for Length Extrapolation". arXiv preprint arXiv:2205.09921. 2022.
- Horawalavithana, Ayton, Sharma, Howland, Subramanian, Vasquez, Cosbey, Glenski, and Volkova. "Foundation Models of Scientific Knowledge for Chemistry: Opportunities, Challenges and Lessons Learned." In Proceedings of the ACL Workshop on Challenges & Perspectives in Creating Large Language Models. 2022.
- Kolak, Martins, Le Goues, and Hellendoorn. "Patch Generation with Language Models: Feasibility and Scaling Behavior"." In Proceedings of the Deep Learning for Code Workshop at ICLR. 2022.
- Xu, Alon, Neubig, and Hellendoorn. "A Systematic Evaluation of Large Language Models of Code." In Proceedings of the ICLR Workshop on Deep Learning For Code. 2022.
We run our experiments on a Kubernetes cluster generously provided by CoreWeave.