[mvapich-discuss] Announcing the release of MVAPICH2 2.0.1, MVAPICH2-X 2.0.1, and OMB 4.4.1

[Panda, Dhabaleswar]

The MVAPICH team is pleased to announce the release of MVAPICH2 2.0.1,
MVAPICH2-X 2.0.1 (Hybrid MPI+PGAS (OpenSHMEM) with Unified
Communication Runtime) and OSU Micro-Benchmarks (OMB) 4.4.1.

These are primarily bug-fix releases. MVAPICH2 2.0, MVAPICH2-X 2.0, and
OMB 4.4 users are requested to upgrade to these latest versions.

Features, Enhancements, and Bug Fixes for MVAPICH2 2.0.1 are listed
here.

* Features and Enhancements (since 2.0 GA):

    - Support for PMI-2 based startup with SLURM
    - Enhanced startup performance for Gen2/UD-Hybrid channel
    - Add -export-all option to mpirun_rsh
    - GPU support for MPI_Scan and MPI_Exscan collective operations
    - Optimize creation of 2-level communicator
    - Collective optimization for PSM-CH3 channel
    - Increase counter length for shared-memory collectives
    - Tuning for IvyBridge architecture
    - Support for additional MPI-T performance variables (PVARs)
      in the CH3 channel
    - Standardizing the MPI-T PVAR names
    - Link with libstdc++ when building with GPU support
        (required by CUDA 6.5)
    - Increase number of connect attempts for RDMA_CM

* Bug-Fixes (since 2.0 GA):
    - Fix issues in MPI_Unpack operation with CUDA
    - Fix issues with DPM and PMI-1 APIs
    - Fix issue with DPM and non-blocking collectives
    - Fix issue with detecting the use of mpirun_rsh in SMP jobs
    - Add check for pending operations in one-sided channel in flush_all
          - Thanks to Hajime Fujita for the report
    - Fixing threads deadlock scenario with collectives
    - Fix error in large message (>2GB) transfers in CMA code path
    - Fix issues with optimizations for broadcast and reduce collectives
    - Fix hang at finalize with Gen2-Hybrid/UD channel
    - Fix issues for collectives with non power-of-two process counts
          - Thanks to Evren Yurtesen for identifying the issue
    - Make ring startup use HCA selected by user
    - Fix corner error case with RDMA_CM
    - Fix several compile time warnings
    - Fix memory leaks in OFA-IB-CH3 and OFA-IB-Nemesis channels

MVAPICH2-X 2.0.1 software package provides support for hybrid MPI+PGAS
(UPC and OpenSHMEM) programming models with unified communication
runtime for emerging exascale systems. This software package provides
flexibility for users to write applications using the following
programming models with a unified communication runtime: MPI,
MPI+OpenMP, pure UPC, and pure OpenSHMEM programs as well as hybrid
MPI(+OpenMP) + PGAS (UPC and OpenSHMEM) programs.

Features and enhancements for MVAPICH2-X 2.0.1 are as follows:

* Features and Enhancements (since 2.0 GA):
    - MPI Features
        - Based on MVAPICH2 2.0.1 (OFA-IB-CH3 interface)

    - Unified Runtime Features
        - Based on MVAPICH2 2.0.1 (OFA-IB-CH3 interface). All the runtime
          features enabled by default in OFA-IB-CH3 interface of
          MVAPICH2 2.0.1 are available in MVAPICH2-X 2.0.1

Bug Fixes for OSU Micro-Benchmarks (OMB) 4.4.1 are
listed here.

* Bug Fixes (since OMB 4.4)
    - adding missing MPI3 guard for WIN_ALLOCATE
    - capture getopt return value in an int instead of char

For downloading MVAPICH2 2.0.1, MVAPICH2-X 2.0.1, OMB 4.4.1,
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
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