Birds of a Feather
Unified Communication X (UCX)
Event Type
Birds of a Feather
Exascale Systems
Extreme-Scale Computing
Performance Analysis and Optimization
Programming Models & Languages
TimeWednesday, June 27th9:30am - 10:30am
DescriptionIn order to exploit the capabilities of new HPC systems and to meet their demands in scalability, communication software needs to scale on millions of cores and support applications with adequate functionality to express their parallelism. UCX is a collaboration between industry, national labs and academia that consolidates multiple technologies a unified open source framework. The UCX consortium includes members from Los Alamos National Laboratory, Oak Ridge National Laboratory, Argonne National Laboratory, AMD, ARM, IBM, Mellanox, NVIDIA, Ohio State University and more.

High-level programming models for communication (e.g., MPI, UPC, SHMEM) can be built on top of middleware, such as Portals, GASNet, UCCS, and ARMCI or use lower-level network-specific interfaces, often provided by the vendor. While the former offer high-level communication abstractions and portability across different systems, the latter offer proximity to the hardware and minimize overheads related to multiple software layers. An effort to combine the advantages of both is UCX, a communication framework for high-performance computing systems.

UCX has already been integrated with upstream of Open MPI project and OpenSHMEM, being used with MPICH and more. UCX is now being deployed with the US DOE Coral systems. The session will introduce the latest development and UCX specification to the HPC developers and users community. It will enable a dialog on the future plans for UCX and review the operations of the UCX consortium. It will include performance evaluation based on testing results conducted on several US DoE systems.
BoF Organizer/Speakers
Group Leader at Los Alamos National Laboratory
Principal Research Engineer