[mvapich-discuss] Announcing the release of MVAPICH2 2.3Rc1 and OMB 5.4.1

[Panda, Dhabaleswar]

The MVAPICH team is pleased to announce the release of MVAPICH2 2.3rc1 and
OMB 5.4.1.

Features and enhancements for MVAPICH2 2.3rc1 are as follows:

* Features and Enhancements (since 2.3b):
    - Enhanced performance for Allreduce, Reduce_scatter_block, Allgather,
      and Allgatherv through new algorithms
        - Thanks to Danielle Sikich and Adam Moody @ LLNL for the patch
    - Enhance support for MPI_T PVARs and CVARs
    - Improved job startup time for OFA-IB-CH3, PSM-CH3, and PSM2-CH3
    - Support to automatically detect IP address of IB/RoCE interfaces when
      RDMA_CM is enabled without relying on mv2.conf file
    - Enhance HCA detection to handle cases where node has both IB and RoCE
      HCAs
    - Automatically detect and use maximum supported MTU by the HCA
    - Added logic to detect heterogeneous CPU/HFI configurations in PSM-CH3 and
      PSM2-CH3 channels
        - Thanks to Matias Cabral at Intel for the report
    - Enhanced intra-node and inter-node tuning for PSM-CH3 and PSM2-CH3
      channels
    - Enhanced HFI selection logic for systems with multiple Omni-Path HFIs
    - Enhanced tuning and architecture detection for OpenPOWER, Intel Skylake
      and Cavium ARM (ThunderX) systems
    - Added 'SPREAD', 'BUNCH', and 'SCATTER' binding options for hybrid CPU
      binding policy
    - Rename MV2_THREADS_BINDING_POLICY to MV2_HYBRID_BINDING_POLICY
    - Added support for MV2_SHOW_CPU_BINDING to display number of OMP threads
    - Update to hwloc version 1.11.9

* Bug Fixes (since 2.3b):
    - Fix issue with RDMA_CM in multi-rail scenario
    - Fix issues in nullpscw RMA test
    - Fix issue with reduce and allreduce algorithms for large message sizes
    - Fix hang issue in hydra when no SLURM environment is present
        - Thanks to Vaibhav Sundriyal for the report
    - Fix issue to test Fortran KIND with FFLAGS
        - Thanks to Rob Latham at mcs.anl.gov for the patch
    - Fix issue in parsing environment variables
    - Fix issue in displaying process to HCA binding
    - Enhance CPU binding logic to handle vendor specific core mappings
    - Fix compilation warnings and memory leaks

New features, enhancements and bug fixes for OSU Micro-Benchmarks
(OMB) 5.4.1 are listed here.

* New Features & Enhancements (since 5.4)
    - Enhanced help messages and runtime parameters

* Bug Fixes
    - Fix compile and runtime issues in PGAS benchmarks (OpenSHMEM, UPC, and
      UPC++) exposed by PGI compiler
    - Added warning message to display memory limitation when running
      benchmarks with very large messages
    - Fix memory leaks for device buffers
    - Fix issues with type overflows
    - Fix an issue with pWork symmetric heap allocation in oshm_reduce
      benchmark
        - Thanks to Naveen Ravichandrasekaran at Cray for the report

For downloading MVAPICH2 2.3rc1, OMB 5.4.1 and associated user guides,
quick start guide, and accessing the SVN, please visit the following
URL:

http://mvapich.cse.ohio-state.edu

All questions, feedback, bug reports, hints for performance tuning,
patches and enhancements are welcome. Please post it to the
mvapich-discuss mailing list (mvapich-discuss at cse.ohio-state.edu).

Thanks,

The MVAPICH Team

PS: We are also happy to inform everyone that the number of
organizations using MVAPICH2 libraries (and registered at the MVAPICH
site) has crossed 2,875 worldwide (in 85 countries). The number of
downloads from the MVAPICH site has crossed 445,000 (0.44 million).
The MVAPICH team would like to thank all its users and organizations!!