GASNet-EX 2021.9.0 Release Announcement

The Pagoda project at Lawrence Berkeley National Laboratory is pleased to announce the latest release of GASNet-EX, now available for download from gasnet.lbl.gov. Recent changes are described in the ChangeLog.  Some highlights include:

• Memory Kinds (device memory RDMA) support

• Added support for AMD HIP GPUs

• Added support for (experimental) ucx-conduit

• Now supports four combinations of network API and GPU vendor:

• ibv-conduit and ucx-conduit

• Nvidia and AMD

• InfiniBand Verbs (ibv-conduit)

• Made multiple improvements to performance and scalability

• Unified Communication X framework (ucx-conduit) [EXPERIMENTAL]

• Improved performance and correctness

• All networks

• Improved performance of shared-memory RMA

• Ability to exclude shared-memory RMA logic, per operation, when unneeded

• Portability

• Added support for Intel oneAPI compiler family

• Added support for Nvidia NVHPC compiler family

• Improved support for GCC-11 (warning changes)

GASNet-EX is the next generation of the GASNet communication system. The GASNet interfaces are being redesigned to accommodate the emerging needs of exascale supercomputing, providing communication services to a variety of PGAS programming models on current and future HPC systems. This upgrade is being done as part of the DOE Exascale Computing Project (ECP). Note that additional features are coming soon, and are not yet present in this release.

-Paul H. Hargrove, on behalf of the Pagoda project at LBNL