MVAPICH - Announcing the release of MVAPICH2 2.0rc2 and MVAPICH2-X 2.0rc2

The MVAPICH team is pleased to announce the release of MVAPICH2 2.0rc2 and MVAPICH2-X 2.0rc2 (Hybrid MPI+PGAS (OpenSHMEM) with Unified Communication Runtime).

Features, Enhancements, and Bug Fixes for MVAPICH2 2.0rc2 (since
MVAPICH2 2.0rc1 release) are listed here.

* Features and Enhancements (since 2.0rc1):
    - CMA support is now enabled by default
    - Optimization of collectives with CMA support
    - RMA optimizations for shared memory and atomic operations
    - Tuning RGET and Atomics operations
    - Tuning RDMA FP-based communication 
    - MPI-T support for additional performance and control variables
    - The --enable-mpit-pvars=yes configuration option will now
      enable only MVAPICH2 specific variables
    - Large message transfer support for PSM interface
    - Optimization of collectives for PSM interface
    - Updated to hwloc v1.9

* Bug-Fixes (since 2.0rc1):
    - Fix multicast hang when there is a single process on one node
      and more than one process on other nodes
    - Fix non-power-of-two usage of scatter-doubling-allgather algorithm
    - Fix for bcastzero type hang during finalize
    - Enhanced handling of failures in RDMA_CM based
      connection establishment
    - Fix for a hang in finalize when using RDMA_CM
    - Finish receive request when RDMA READ completes in RGET protocol
    - Always use direct RDMA when flush is used
    - Fix compilation error with --enable-g=all in PSM interface
    - Fix warnings and memory leaks

MVAPICH2-X 2.0rc2 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 2.0rc2 (since MVAPICH2-X 2.0rc1) are as follows:

* Features and Enhancements (since 2.0rc1):
    - MPI Features
        - Based on MVAPICH2 2.0rc2 (OFA-IB-CH3 interface)

    - Unified Runtime Features
        - Based on MVAPICH2 2.0rc2 (OFA-IB-CH3 interface). All the
          runtime features enabled by default in OFA-IB-CH3 interface
          of MVAPICH2 2.0rc2 are available in MVAPICH2-X 2.0rc2

For downloading MVAPICH2 2.0rc2 and MVAPICH2-X 2.0rc2, associated user guides, quick start guide, and accessing the SVN, please visit the following URL: http://mvapich.cse.ohio-state.edu