Translate is a library for machine translation written in PyTorch. It provides training for sequence-to-sequence models. Translate relies on fairseq, a general sequence-to-sequence library, which means that models implemented in both Translate and Fairseq can be trained. Translate also provides the ability to export some models to Caffe2 graphs via ONNX and to load and run these models from C++ for production purposes. Currently, we export components (encoder, decoder) to Caffe2 separately and beam search is implemented in C++. In the near future, we will be able to export the beam search as well. We also plan to add export support to more models.
- A Linux operating system with a CUDA compatible card
- GNU C++ compiler version 4.9.2 and above
- A CUDA installation. We recommend CUDA 8.0 or CUDA 9.0
Install Docker and nvidia-docker, then run
sudo docker pull pytorch/translate
sudo nvidia-docker run -i -t --rm pytorch/translate /bin/bash
. ~/miniconda/bin/activate
cd ~/translate
You should now be able to run the sample commands in the Usage Examples section below. You can also see the available image versions under https://hub.docker.com/r/pytorch/translate/tags/.
These instructions were mainly tested on CentOS 7.4.1708 with a Tesla M40 card and a CUDA 8 installation. We highly encourage you to report an issue if you are unable to install this project for your specific configuration.
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If you don't already have an existing Anaconda environment with Python 3.6, you can install one via Miniconda3:
wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh chmod +x miniconda.sh ./miniconda.sh -b -p ~/miniconda rm miniconda.sh . ~/miniconda/bin/activate -
Clone the Translate repo:
git clone https://github.com/pytorch/translate.git pushd translate -
Install the combined PyTorch and Caffe2 Conda package:
# Set to 8 or 9 depending on your CUDA version. TMP_CUDA_VERSION="9" # Uninstall previous versions of PyTorch. Doing this twice is intentional. # Error messages about torch not being installed are benign. pip uninstall -y torch pip uninstall -y torch # This may not be necessary if you already have the latest cuDNN library. conda install -y cudnn # Add LAPACK support for the GPU. conda install -y -c pytorch "magma-cuda${TMP_CUDA_VERSION}0" # Install the combined PyTorch+Caffe2 conda package. conda install -y -c caffe2 "pytorch-caffe2-cuda${TMP_CUDA_VERSION}.0-cudnn7" # Force re-install of numpy 1.14 since the current version of the # PyTorch+Caffe2 package downgrades it. conda install -y numpy==1.14 --no-deps # Install NCCL2. wget "https://s3.amazonaws.com/pytorch/nccl_2.1.15-1%2Bcuda${TMP_CUDA_VERSION}.0_x86_64.txz" TMP_NCCL_VERSION="nccl_2.1.15-1+cuda${TMP_CUDA_VERSION}.0_x86_64" tar -xvf "${TMP_NCCL_VERSION}.txz" rm "${TMP_NCCL_VERSION}.txz" # Set some environmental variables needed to link libraries correctly. export CONDA_PATH="$(dirname $(which conda))/.." export NCCL_ROOT_DIR="$(pwd)/${TMP_NCCL_VERSION}" export LD_LIBRARY_PATH="${CONDA_PATH}/lib:${NCCL_ROOT_DIR}/lib:${LD_LIBRARY_PATH}" -
Install ONNX:
git clone --recursive https://github.com/onnx/onnx.git yes | pip install ./onnx 2>&1 | tee ONNX_OUT -
Build Translate:
pip uninstall -y pytorch-translate python3 setup.py build develop pushd pytorch_translate/cpp mkdir build && pushd build cmake \ -DCMAKE_PREFIX_PATH="${CONDA_PATH}/usr/local" \ -DCMAKE_INSTALL_PREFIX="${CONDA_PATH}" .. \ 2>&1 | tee CMAKE_OUT make 2>&1 | tee MAKE_OUT # Return to the translate directory. popd popd
Now you should be able to run the example scripts below!
You can launch an AWS instance using the pytorch_translate_initial_release image (AMI ID: ami-04ff53cdd573658dc). Once you have ssh'ed to the AWS instance, the example commands below should work after running cd translate.
Note: the example commands given assume that you are the root of the cloned
GitHub repository or that you're in the translate directory of the Docker or
Amazon image. You may also need to make sure you have the Anaconda environment
activated.
We provide an example script to train a model for the IWSLT 2014 German-English task. We used this command to obtain a pretrained model:
bash pytorch_translate/examples/train_iwslt14.sh
The pretrained model actually contains two checkpoints that correspond to training twice with random initialization of the parameters. This is useful to obtain ensembles. This dataset is relatively small (~160K sentence pairs), so training will complete in a few hours on a single GPU.
A pretrained model for IWSLT 2014 can be evaluated by running the example script:
bash pytorch_translate/examples/generate_iwslt14.sh
Note the improvement in performance when using an ensemble of size 2 instead of a single model.
We provide an example script to export a PyTorch model to a Caffe2 graph via ONNX:
bash pytorch_translate/examples/export_iwslt14.sh
This will output two files, encoder.pb and decoder.pb, that correspond to the computation of the encoder and one step of the decoder. The example exports a single checkpoint (--checkpoint model/averaged_checkpoint_best_0.pt but is also possible to export an ensemble (--checkpoint model/averaged_checkpoint_best_0.pt --checkpoint model/averaged_checkpoint_best_1.pt). Note that during export, you can also control a few hyperparameters such as beam search size, word and UNK rewards.
To use the sample exported Caffe2 model to translate sentences, run:
echo "hallo welt" | bash pytorch_translate/examples/translate_iwslt14.sh
Note that the model takes in BPE inputs, so some input words need to be split into multiple tokens. For instance, "hineinstopfen" is represented as "hinein@@ stop@@ fen".
We welcome contributions! See the CONTRIBUTING.md file for how to help out.
Translate is BSD-licensed, as found in the LICENSE file.