Apex (A PyTorch Extension)

This site contains the API documentation for Apex (https://github.com/nvidia/apex), a Pytorch extension with NVIDIA-maintained utilities to streamline mixed precision and distributed training. Some of the code here will be included in upstream Pytorch eventually. The intention of Apex is to make up-to-date utilities available to users as quickly as possible.

Installation requires CUDA 9 or later, PyTorch 0.4 or later, and Python 3. Install by running

git clone https://www.github.com/nvidia/apex
cd apex
python setup.py install [--cuda_ext] [--cpp_ext]

AMP: Automatic Mixed Precision

• apex.amp

FP16/Mixed Precision Utilities

• apex.fp16_utils

Distributed Training

• apex.parallel

Fused Optimizers

• apex.optimizers

Fused Layer Norm

• apex.normalization.fused_layer_norm

Indices and tables

• Index
• Module Index