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Sandia OpenSHMEM v1.4.0 RC1

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@jdinan jdinan released this 22 Dec 21:48
v1.4.0rc1
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The Sandia OpenSHMEM development team is pleased to announce SOS v1.4.0, release candidate 1. Below are some of the changes included in this release:

  • Support for OpenSHMEM 1.4, for details please refer to the OpenSHMEM 1.4 Specification.
    • New features include: Thread safety, communication management API (contexts), test routines, sync routines, calloc, bitwise atomic operations, and updated C11 generic selection bindings.
    • Deprecations include: Legacy Fortran API, shmem_wait routines, mpp header directory, and SMA-prefixed environment variables.
  • Added support for OFI FI_THREAD_COMPLETION thread safety model, needed to use the SHMEM_THREAD_MULTIPLE mode with the PSM2 provider and others (see --enable-thread-completion). For providers that support FI_THREAD_SAFE, this mode may also provider better performance for private and serialized contexts.
  • Added manpages for OpenSHMEM 1.4 API routines.
  • Improved performance of private and serialized contexts.
  • Improved performance of shmem_fence operation.
  • Added memory barriers needed to support shared memory interactions between threads and PEs.
  • Updated unit tests to remove use of deprecated API routines.

Please note that this is a pre-release, which may contain bugs or performance issues. In particular, internal resource sharing between OpenSHMEM contexts remains a work-in-progress, which may limit the number of contexts that can be created for a given OFI provider. While all OpenSHMEM 1.4 features have been implemented for the Portals transport, several features including contexts, are not yet optimized for Portals.

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