Skip to content


Choose a tag to compare
@bvanessen bvanessen released this 30 Jul 17:15
· 248 commits to master since this release

============================== Release Notes: v0.100 ==============================
Support for new network structures:

  • 3D molecular generation models for Metal Organic Frameworks from the CoRE MOF Database.
  • 3D CosmoFlow Model
  • DenseNet
  • ATOM LSTM model
  • RAS state classifier
  • node2vec
  • Transformer and other attention-based models
  • ExaGAN (formerly CosmoGAN)
  • MaCC ICF surrogate model


  • Created a directory of example applications, deprecating the "model zoo" directory

Support for new layers:

  • Embedding layer
  • Distributed embedding layer
  • Channel-wise scale/bias layer
  • Entry-wise scale/bias layer
  • Gated-Recurrent Units (GRU)
  • Entry-wise batchnorm
  • Argmax, Argmin, and one-hot layers
  • Layer norm
  • Deconvolution layer (transposed convolution)
  • Layers for channel-wise operations (channel-wise fully-connected, channel-wise softmax, channel-wise scale/bias, instance norm)
  • Matrix multiply layer

Python front-end:

  • Can now configure contrib launcher with environment variables
  • Added NERSC compute center
  • Per-layer specification of compute device (CPU or GPU)
  • Option to write custom batch scripts with Python front-end

Performance optimizations:

  • Parallelized Python data reader with "multiprocessing" module
  • Fuse batchnorm stats allreduces in FP/BP.
  • Tuned concatenate and slice layer
  • Dynamically allocate and free memory for layer error signals (halves LBANN's memory footprint)

Model portability & usability:

  • Bamboo tests for individual layers

Internal features:

  • Added support for DistConv features (distributed, generalized,
    parallel convolution)
  • Added support for NVSHMEM 1.0 API (used in distributed embedding
    layer and DistConv halo exchange)
  • Support for multiple data types per model (per-layer)
  • Support for per-layer mixed-precision weight training and inference,
    includes per-weight object and objective function mixed-precision.
  • Improved how and when the RNGs are initialized
  • Callback to dump images to TensorBoard
  • Callback to save model weights (useful to export to PyTorch)
  • Callback to save top K models (LTFB)
  • Improved run-to-run reproducibility by initializing weights in alphabetical order
  • Moved models from model_zoo directory to applications directory
  • Cleanup and refactoring of callbacks and layer instantiation
  • Grouped batchnorm statistics
  • Callback to print model description
  • Refactored trainer and training-state out of the model class
  • Support for transposing data in matrix multiply layers
  • Added DiHydrogen tensor and DistConv library
  • Added parallel strategy to layer class to support DistConv
  • LBANN inference mode supports loading models from multiple directories
  • Cleanup of checkpoint and restart logic

I/O & data readers:

  • Added in-memory data store that caches samples in CPU memory. It can be loaded
    during the first epoch or preloaded
  • Added new "transform" data preprocessing ingestion pipeline
  • Added sample list format for specifying data sets
  • Introduced data coordinator that manages data readers and extracts them from
    the input layers
  • Data store is able to checkpoint / spill it's contents to local disk
  • Data reader for SMILE strings

Build system:

  • Hydrogen 1.3.4
  • Aluminum 0.3.3
  • Improved documentation on read the docs (RTD)
  • Robust support for using Spack as a build system around CMake
  • Identified compute centers for specifying build and run dependencies
  • Added Catch2-based tests

Bug fixes:

  • Fixed path resolution for dump weights, save model, and checkpoint callbacks
  • Added mutexes for preloading the data store
  • Fixed the LTFB exchange to include all ADAM optimizer state
  • Fixed the mapping of I/O RNGs to I/O processing threads to ensure
    consistent and correct multi-threaded performance

Retired features:

  • moving MNIST data reader is replaced by python data reader
  • ASCII data reader is deprecated