A Memory-Driven Mapping Algorithm for Heterogeneous Systems

mpibind is a memory-driven algorithm to map parallel hybrid applications to the underlying hardware resources transparently, efficiently, and portably. Unlike other mappings, its primary design point is the memory system, including the cache hierarchy. Compute elements are selected based on a memory mapping and not vice versa. In addition, mpibind embodies a global awareness of hybrid programming abstractions as well as heterogeneous systems with accelerators.

Getting started

The easiest way to get mpibind is using spack.

spack install mpibind

# On systems with NVIDIA GPUs
spack install mpibind+cuda

# On systems with AMD GPUs
spack install mpibind+rocm

# More details
spack info mpibind

Alternatively, one can build the package manually as described below.

Building and installing

This project uses GNU Autotools.

$ ./bootstrap

$ ./configure --prefix=<install_dir>

$ make

$ make install

If building from a release tarball, please specify MPIBIND_VERSION appropriately. For example:

$ MPIBIND_VERSION=0.15.1 ./bootstrap

$ ./configure --prefix=<install_dir>

$ make

$ make install

The resulting library is <install_dir>/lib/libmpibind and a simple program using it is src/main.c

Test suite

$ make check

Dependencies

• GNU Autotools is the build system.

• hwloc version 2 is required to detect the machine topology.

  Before building mpibind, make sure hwloc can be detected with pkg-config:

  pkg-config --variable=libdir --modversion hwloc
  

  If this fails, add hwloc's pkg-config directory to PKG_CONFIG_PATH, e.g.,

  export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:<hwloc-prefix>/lib/pkgconfig
  

• libtap is required to build the test suite.

  To verify tap can be detected with pkg-config, follow a similar procedure as for hwloc above.

Contributing

Contributions for bug fixes and new features are welcome and follow the GitHub fork and pull model. Contributors develop on a branch of their personal fork and create pull requests to merge their changes into the main repository.

The steps are similar to those of the Flux framework:

1. Fork mpibind.
2. Clone your fork: git clone git@github.com:[username]/mpibind.git
3. Create a topic branch for your changes: git checkout -b new_feature
4. Create feature or add fix (and add tests if possible)
5. Make sure everything still passes: make check
6. Push the branch to your GitHub repo: git push origin new_feature
7. Create a pull request against mpibind and describe what your changes do and why you think it should be merged. List any outstanding todo items.

Authors

mpibind was created by Edgar A. León.

Citing mpibind

To reference mpibind, please cite one of the following papers:

• Edgar A. León and Matthieu Hautreux. Achieving Transparency Mapping Parallel Applications: A Memory Hierarchy Affair. In International Symposium on Memory Systems, MEMSYS'18, Washington, DC, October 2018. ACM.

• Edgar A. León. mpibind: A Memory-Centric Affinity Algorithm for Hybrid Applications. In International Symposium on Memory Systems, MEMSYS'17, Washington, DC, October 2017. ACM.

• Edgar A. León, Ian Karlin, and Adam T. Moody. System Noise Revisited: Enabling Application Scalability and Reproducibility with SMT. In International Parallel & Distributed Processing Symposium, IPDPS'16, Chicago, IL, May 2016. IEEE.

Other references:

• J. P. Dahm, D. F. Richards, A. Black, A. D. Bertsch, L. Grinberg, I. Karlin, S. Kokkila-Schumacher, E. A. León, R. Neely, R. Pankajakshan, and O. Pearce. Sierra Center of Excellence: Lessons learned. In IBM Journal of Research and Development, vol. 64, no. 3/4, May-July 2020.

• Edgar A. León. Cross-Architecture Affinity of Supercomputers. In International Supercomputing Conference (Research Poster), ISC’19, Frankfurt, Germany, June 2019.

• Edgar A. León. Mapping MPI+X Applications to Multi-GPU Architectures: A Performance-Portable Approach. In GPU Technology Conference, GTC'18, San Jose, CA, March 2018.

Bibtex file.

License

mpibind is distributed under the terms of the MIT license. All new contributions must be made under this license.

See LICENSE and NOTICE for details.

SPDX-License-Identifier: MIT.

LLNL-CODE-812647.