[mvapich-discuss] Announcing the Release of MVAPICH2 2.3.4 GA and OSU Micro-Benchmarks (OMB) 5.6.3

[Panda, Dhabaleswar]

The MVAPICH team is pleased to announce the release of MVAPICH2 2.3.4
GA and OSU Micro-Benchmarks (OMB) 5.6.3.

Features and enhancements for MVAPICH2 2.3.4 GA are as follows:

 * Features and Enhancements (since 2.3.3):
     - Improved performance for small message collective operations
     - Improved performance for data transfers from/to non-contiguous buffers used
       by user-defined datatypes
     - Add custom API to identify if MVAPICH2 has in-built CUDA support
     - New API 'MPIX_Query_cuda_support' defined in mpi-ext.h
         - New macro 'MPIX_CUDA_AWARE_SUPPORT' defined in mpi-ext.h
     - Add support for MPI_REAL16 based reduction operations for Fortran programs
         - MPI_SUM, MPI_MAX, MPI_MIN, MPI_LAND, MPI_LOR, MPI_MINLOC, and MPI_MAXLOC
         - Thanks to Greg Lee at LLNL for the report and reproducer
         - Thanks to Hui Zhou at ANL for the initial patch
     - Add support to intercept aligned_alloc in ptmalloc
         - Thanks to Ye Luo @ANL for the report and the reproducer
     - Add support to enable fork safety in MVAPICH2 using environment variable
       "MV2_SUPPORT_FORK_SAFETY"
     - Add support for user to modify QKEY using environment variable
       "MV2_DEFAULT_QKEY"
     - Add multiple MPI_T PVARs and CVARs for point-to-point and collective
       operations
     - Enhanced point-to-point and collective tuning for AMD EPYC Rome,
       Frontera at TACC, Longhorn at TACC, Mayer at Sandia, Pitzer at OSC, Catalyst at EPCC,
       Summit at ORNL, Lassen at LLNL, and Sierra at LLNL systems
     - Give preference to CMA if LiMIC2 and CMA are enabled at the same time
     - Move -lmpi, -lmpicxx, and -lmpifort before other LDFLAGS in compiler
       wrappers like mpicc, mpicxx, mpif77, and mpif90
     - Allow passing flags to nvcc compiler through environment variable
       NVCCFLAGS
     - Display more meaningful error messages for InfiniBand asynchronous events
     - Add support for AMD Optimizing C/C++ (AOCC) compiler v2.1.0
     - Add support for GCC compiler v10.1.0
         - Requires setting FFLAGS=-fallow-argument-mismatch at configure time
     - Update to hwloc v2.2.0

 * Bug Fixes (since 2.3.3):
     - Fix compilation issue with IBM XLC++ compilers and CUDA 10.2
     - Fix hangs with MPI_Get operations win UD-Hybrid mode
     - Initialize MPI3 data structures correctly to avoid random hangs caused by
       garbage values
     - Fix corner case with LiMIC2 and MPI3 one-sided operations
     - Add proper fallback and warning message when shared RMA window cannot be
       created
     - Fix race condition in calling mv2_get_path_rec_sl by introducing mutex
         - Thanks to Alexander Melnikov for reporting the issue and providing
           the patch
     - Fix mapping generation for the cases where hwloc returns zero on non-numa
       machines
         - Thanks to Honggang Li @Red Hat for the report and initial patch
     - Fix issues with InfiniBand registration cache and PGI20 compiler
     - Fix warnings raised by Coverity scans
         - Thanks to Honggang Li @Red Hat for the report
     - Fix bad baseptr address returned from MPI_Win_shared_query
         - Thanks to Adam Moody at LLNL for the report and discussion
     - Fix issues with HCA selection logic in heterogeneous multi-rail scenarios
     - Fix spelling mistake in error message
         - Thanks to Bill Long and Krishna Kandalla @Cray/HPE for the report
     - Fix compilation warnings and memory leaks

New features, enhancements and bug fixes for OSU Micro-Benchmarks
(OMB) 5.6.3 are listed here

 * New Features & Enhancements (since v5.6.2)
     - Add support for benchmarking applications that use 'fork' system call
         * osu_latency_mp

 * Bug Fixes (since v5.6.2)
     - Fix compilation issue with IBM XLC++ compilers and CUDA 10.2
     - Allow passing flags to nvcc compiler
     - Fix issues in window creation with host-to-device and device-to-host
       transfers for one-sided tests

For downloading MVAPICH2 2.3.4 GA, OMB 5.6.3, 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
3,075 worldwide (in 89 countries). The number of downloads from the
MVAPICH site has crossed 757,000 (0.75 million).  The MVAPICH team
would like to thank all its users and organizations!!