Deep-Compression-PyTorch
PyTorch implementation of 'Deep Compression: Compressing Deep Neural Networks with Pruning, Trained Quantization and Huffman Coding' by Song Han, Huizi Mao, William J. Dally
This implementation implements three core methods in the paper - Deep Compression
- Pruning
- Weight sharing
- Huffman Encoding
Requirements
Following packages are required for this project
- Python3.6+
- tqdm
- numpy
- pytorch, torchvision
- scipy
- scikit-learn
or just use docker
$ docker pull tonyapplekim/deepcompressionpytorchUsage
pruning
$ python pruning.pyThis command
- trains LeNet-300-100 model with MNIST dataset
- prunes weight values that has low absolute value
- retrains the model with MNIST dataset
- prints out non-zero statistics for each weights in the layer
You can control other values such as
- random seed
- epochs
- sensitivity
- batch size
- learning rate
- and others
For more, type
python pruning.py --help
weight sharing
$ python weight_share.py saves/model_after_retraining.ptmodelThis command
- Applies K-means clustering algorithm for the data portion of CSC or CSR matrix representation for each weight
- Then, every non-zero weight is now clustered into (2**bits) groups. (Default is 32 groups - using 5 bits)
- This modified model is saved to
saves/model_after_weight_sharing.ptmodel
Huffman coding
$ python huffman_encode.py saves/model_after_weight_sharing.ptmodelThis command
- Applies Huffman coding algorithm for each of the weights in the network
- Saves each weight to
encodings/folder - Prints statistics for improvement
Note
Note that I didn’t apply pruning nor weight sharing nor Huffman coding for bias values. Maybe it’s better if I apply those to the biases as well, I haven’t try this out yet.