Abstract
As a representative of Partitioned Global Address Space models, OpenSHMEM provides a variety of functionalities including one-sided communication, atomic operations, and collective routines. The communication layer of OpenSHMEM-X plays a crucial role for its functionalities. OFI Libfabric is an open-source network library that supports portable low-latency interfaces from different fabric providers while minimizing the semantic gap across API endpoints. In this paper, we present the design and implementation of OpenSHMEM-X communication conduit using Libfabric. This Libfabric conduit is designed to support a broad range of network providers while achieving excellent network performance and scalability. We have performed an extensive set of experiments to validate the performance of our implementation, and compared with the Sandia OpenSHMEM implementation. Our results show that the Libfabric conduit improves the communication bandwidth on the socket provider by up to 42% and 11%, compared to an alternative OpenSHMEM implementation for put and get operations, respectively. In addition, our implementation of atomic operations has achieved similar latency to that of the Sandia implementation.
This work was sponsored by the U.S. Department of Energy’s Office of Advanced Scientific Computing Research. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Baker, M., Aderholdt, F., Venkata, M.G., Shamis, P.: OpenSHMEM-UCX: evaluation of UCX for implementing OpenSHMEM programming model. In: Gorentla Venkata, M., Imam, N., Pophale, S., Mintz, T.M. (eds.) OpenSHMEM 2016. LNCS, vol. 10007, pp. 114–130. Springer, Cham (2016). https://doi.org/10.1007/978-3-319-50995-2_8
Castain, R.H., Hursey, J., Bouteiller, A., Solt, D.: PMIx: process management for exascale environments. In: Proceedings of the 24th European MPI Users’ Group Meeting, EuroMPI 2017, New York, NY, USA, pp. 14:1–14:10. ACM (2017)
Chapman, B., et al.: Introducing OpenSHMEM: SHMEM for the PGAS community. In: Proceedings of the Fourth Conference on Partitioned Global Address Space Programming Model, PGAS 2010, New York, NY, USA, pp. 2:1–2:3. ACM (2010)
EOS, Cray\(^{{\textregistered }}\) XC30\({{{{\rm TM}}}}\). https://www.olcf.ornl.gov/for-users/system-user-guides/eos/
GASNet. https://gasnet.lbl.gov/
Grun, P., et al.: A brief introduction to the openfabrics interfaces - a new network api for maximizing high performance application efficiency. In: 2015 IEEE 23rd Annual Symposium on High-Performance Interconnects, pp. 34–39, August 2015
Hammond, J.R., Ghosh, S., Chapman, B.M.: Implementing OpenSHMEM using MPI-3 one-sided communication. In: Poole, S., Hernandez, O., Shamis, P. (eds.) OpenSHMEM 2014. LNCS, vol. 8356, pp. 44–58. Springer, Cham (2014). https://doi.org/10.1007/978-3-319-05215-1_4
Libfabric. https://ofiwg.github.io/libfabric/
OpenSHMEM. http://www.openshmem.org/site/
OpenSHMEM-X. https://github.com/ornl-languages/ornl-openshmem.git
PMIx. https://pmix.org/
Seager, K., Choi, S.-E., Dinan, J., Pritchard, H., Sur, S.: Design and implementation of OpenSHMEM using OFI on the aries interconnect. In: Gorentla Venkata, M., Imam, N., Pophale, S., Mintz, T.M. (eds.) OpenSHMEM 2016. LNCS, vol. 10007, pp. 97–113. Springer, Cham (2016). https://doi.org/10.1007/978-3-319-50995-2_7
Shamis, P., et al.: UCX: An open source framework for HPC network APIs and beyond. In: 2015 IEEE 23rd Annual Symposium on High-Performance Interconnects, pp. 40–43, August 2015
Shamis, P., Venkata, M.G., Poole, S., Welch, A., Curtis, T.: Designing a high performance OpenSHMEM implementation using universal common communication substrate as a communication middleware. In: Poole, S., Hernandez, O., Shamis, P. (eds.) OpenSHMEM 2014. LNCS, vol. 8356, pp. 1–13. Springer, Cham (2014). https://doi.org/10.1007/978-3-319-05215-1_1
Acknowledgment
This work is supported in part by a contract from Oak Ridge National Laboratory and the National Science Foundation awards 1561041 and 1564647.
We are thankful to Amit Kumar Nath for his valuable suggestions and feedbacks to the paper. We would like to thank Matthew B. Baker (ORNL) for his help in figuring out the details of OpenSHMEM-X, and Arun Ilango, Sean Hefty and Sayantan Sur from Intel for their valuable comments and suggestions on solving the technical difficulties regarding OFI Libfabric.
This research was supported by the United States Department of Defense (DoD) and Computational Research and Development Programs at Oak Ridge National Laboratory.
This work was sponsored by the U.S. Department of Energy’s Office of Advanced Scientific Computing Research. This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC05-00OR22725.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this paper
Cite this paper
Bhattacharya, S., Salman, S., Gorentla Venkata, M., Kundnani, H., Imam, N., Yu, W. (2019). An Initial Implementation of Libfabric Conduit for OpenSHMEM-X. In: Pophale, S., Imam, N., Aderholdt, F., Gorentla Venkata, M. (eds) OpenSHMEM and Related Technologies. OpenSHMEM in the Era of Extreme Heterogeneity. OpenSHMEM 2018. Lecture Notes in Computer Science(), vol 11283. Springer, Cham. https://doi.org/10.1007/978-3-030-04918-8_4
Download citation
DOI: https://doi.org/10.1007/978-3-030-04918-8_4
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-04917-1
Online ISBN: 978-3-030-04918-8
eBook Packages: Computer ScienceComputer Science (R0)