[mvapich-discuss] Announcing the release of MVAPICH2 2.3b

[Panda, Dhabaleswar]

The MVAPICH team is pleased to announce the release of MVAPICH2 2.3b.

Features and enhancements for MVAPICH2 2.3b are as follows:

* Features and Enhancements (since 2.3a):
    - Enhance performance of point-to-point operations for CH3-Gen2
      (InfiniBand), CH3-PSM, and CH3-PSM2 (Omni-Path) channels
    - Improve performance for MPI-3 RMA operations
    - Introduce support for Cavium ARM (ThunderX) systems
    - Improve support for process to core mapping on many-core systems
        - New environment variable MV2_THREADS_BINDING_POLICY for
          multi-threaded MPI and MPI+OpenMP applications
        - Support `linear' and `compact' placement of threads
        - Warn user if oversubcription of core is detected
    - Improve launch time for large-scale jobs with mpirun_rsh
    - Add support for non-blocking Allreduce using Mellanox SHARP
    - Efficient support for different Intel Knight's Landing (KNL) models
    - Improve performance for Intra- and Inter-node communication for OpenPOWER
      architecture
    - Improve support for large processes per node and hugepages on SMP systems
    - Enhance collective tuning for Intel Knight's Landing and Intel Omni-Path
      based systems
    - Enhance collective tuning for Bebop at ANL, Bridges at PSC, and Stampede2 at TACC
      systems
    - Enhance large message intra-node performance with CH3-IB-Gen2 channel on
      Intel Knight's Landing
    - Enhance support for MPI_T PVARs and CVARs

* Bug Fixes (since 2.3a):
    - Fix issue with bcast algorithm selection
    - Fix issue with large message transfers using CMA
    - Fix issue in Scatter and Gather with large messages
    - Fix tuning tables for various collectives
    - Fix issue with launching single-process MPI jobs
    - Fix compilation error in the CH3-TCP/IP channel
        - Thanks to Isaac Carroll at Lightfleet for the patch
    - Fix issue with memory barrier instructions on ARM
        - Thanks to Pavel (Pasha) Shamis at ARM for reporting the issue
    - Fix compilation warnings and memory leaks

For downloading MVAPICH2 2.3b 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 that the number of organizations using
MVAPICH2 libraries (and registered at the MVAPICH site) has crossed
2,800 worldwide (in 85 countries). The number of downloads from the
MVAPICH site has crossed 424,000 (0.42 million).  The MVAPICH team
would like to thank all its users and organizations!!