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Sandia OpenSHMEM v1.4.4
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@jdinan jdinan released this 19 Sep 20:45
v1.4.4
6935f93
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Learn about vigilant mode.

The Sandia OpenSHMEM development team is pleased to announce SOS v1.4.4. Below are some of the changes included in this release:

  • Experimental support for RXM/Verbs provider stack with libfabric 1.8. Requires --enable-hard-polling and --enable-ofi-mr=basic build flags. The FI_MR_CACHE_MAX_COUNT environment variable should be set to 0 when threading is used. Depending on the libfabric build, setting SHMEM_OFI_PROVIDER="verbs;ofi_rxm" may be necessary to select the provider.
  • Rewrite of node-level detection/management to enable improvements in on-node communication and resource management.
  • Added bandwidth optimized ring reduction algorithm, selectable by setting the SHMEM_REDUCE_ALGORITHM environment variable to "ring". See README for details.
  • Added the SHMEM_COLL_SIZE_CROSSOVER environment variable to control the message size at which collective communication transitions between latency and bandwidth optimization.
  • Added SHMEM_OFI_STX_AUTO environment variable to enable automatic partitioning of STX resources on node. See README for details.
  • Updated unit tests and performance test suite to properly handle failed context creation.
  • Updated OFI transport to support providers that do not support the FI_SHARED_CONTEXT TX attribute (STX) on endpoints.
  • Updated OFI transport to bind a CQ to the target EP (required by some providers) and poll the target CQ when driving manual progress. As a result, manual progress no longer requries a target-side counter and can be used in conjunction with hard polling.
  • Added support for decimal values in the SHMEM_SYMMETRIC_SIZE environment variable (e.g., 1.5G).
  • Updated shmem_init_thread routine to return an error when library initialization fails (e.g., due to invalid SHMEM_SYMMETRIC_SIZE value).
  • Fixed argument/context handling in Mandelbrot example program.
  • Improved handling of context creation failure.
  • Added missing pshmem_global_exit symbol to profiling interfaces.
  • Updated shmem_ptr to return a pointer for the local process, even when inter-PE shared memory is not enabled.
  • Updated fence, quiet, and context destroy to perform no operation for SHMEMX_CTX_INVALID.
  • Additional bugfixes and improvement (see git log for details).
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