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Can We Scale Transformers to Predict Parameters of Diverse ImageNet Models?

ICML 2023 link to the poster, slides and video presentation, tweet

Boris Knyazev, Doha Hwang, Simon Lacoste-Julien

Paper: https://arxiv.org/abs/2303.04143, https://openreview.net/forum?id=7UXf8dAz5T

Introduction

Updates

  • [July 11, 2023] Sync changes with the recent PPUDA/GHN-2 updates,
  • [June 26, 2023] Training and eval on CIFAR-10 and eval on the DeepNets splits are supported.
  • [June 22, 2023] Major code refactoring.
    • Distributed (DDP) training and eval scripts added (see Experiments below).
  • [June 6, 2023] GHN-3 code improved (see ghn3/nn.py), more examples added (see ghn_single_model.py).
  • [Apr 11, 2023] Cleaned up graph construction, sanity check for all PyTorch models.
  • [Apr 4, 2023] Slightly updated graph construction for ViT to be consistent with our paper.
    • Made four variants of our GHN-3 available: ghn3tm8, ghn3sm8, ghn3lm8, ghn3xlm16 (see updated ghn_all_pytorch.ipynb). ghn3tm8 takes just 27MB so it is efficient to use in low-memory cases.

This work extends the previous work Parameter Prediction for Unseen Deep Architectures that introduced improved Graph HyperNetworks (GHN-2). Here, we scale up GHN-2 and release our best performing model GHN-3-XL/m16 as well as smaller variants. Our GHN-3 can be used as a good initialization for many large ImageNet models.

Below are a few figures showcasing our results (see our paper for details).

Our code has only a few dependencies and is easy to use as shown below with PyTorch examples.

Please feel free to open a GitHub issue to ask questions or report bugs. Pull requests are also welcome.

Installation

# If you didn't install ppuda before:
pip install git+https://github.com/facebookresearch/ppuda.git

# If you had ppuda installed before, you need to reinstall it, because it was updated recently:
pip install git+https://github.com/facebookresearch/ppuda.git --no-deps --upgrade --force-reinstall

pip install torch>=1.12.1 torchvision>=0.13.1  # [optional] update torch in case it's old

pip install huggingface_hub joblib # to load pretrained GHNs

pip install timm  # [optional] to use fancy optimizers like LAMB

Imagenet

For training and evaluation on ImageNet, one needs to setup ImageNet as in scripts/imagenet_setup.sh.

Training and evaluation on CIFAR-10 is now also supported, however, it was not presented in the paper.

Usage

import torchvision
from ghn3 import from_pretrained

ghn = from_pretrained()  # default is 'ghn3xlm16.pt', other variants are: 'ghn3tm8.pt', 'ghn3sm8.pt', 'ghn3lm8.pt'

model = torchvision.models.resnet50()  # can be any torchvision model
model = ghn(model)

# That's it, the ResNet-50 is initialized with our GHN-3.

GHN-3 is stored in HuggingFace at https://huggingface.co/SamsungSAILMontreal/ghn3/tree/main. As the largest model (ghn3xlm16.pt) takes about 2.5GB, it takes a while to download the model during the first call of ghn = from_pretrained().

See ghn_single_model.py for the examples of fine-tuning the model or GHN. Also see ghn_all_pytorch.ipynb where we show how to predict parameters for all PyTorch models.

Experiments

These scripts allow for training and evaluation of PyTorch models and GHN-3 and comparing to the baselines as in our paper. Training will be automatically run using DistributedDataParallel on all GPUs available if the script is run using torchrun. See command examples in train_ghn_ddp.py and train_ddp.py.

  • For training GHN-3 see commands in train_ghn_ddp.py.
  • For evaluating GHN-3 see commands in eval_ghn.py (make sure to use --split torch for evaluation on PyTorch).
  • For training PyTorch models with and without GHN-3 initialization see commands in train_ddp.py.
  • For evaluating PyTorch models see commands in eval.py.

License

This code is licensed under MIT license and is based on https://github.com/facebookresearch/ppuda that is also licensed under MIT license.

Citation

@inproceedings{knyazev2023canwescale,
  title={Can We Scale Transformers to Predict Parameters of Diverse ImageNet Models?},
  author={Knyazev, Boris and Hwang, Doha and Lacoste-Julien, Simon},
  booktitle={International Conference on Machine Learning},
  year={2023}
}