[mvapich-discuss] FW: Announcing the release of MVAPICH2-GDR 2.2a and OSU Micro-Benchmarks (OMB) 5.1

[Panda, Dhabaleswar]

The MVAPICH team is pleased to announce the release of MVAPICH2-GDR
2.2a and OSU Micro-Benchmarks (OMB) 5.1.

MVAPICH2-GDR 2.2a is based on the standard MVAPICH2 2.2a release and
incorporates designs that take advantage of the new GPUDirect RDMA
technology for inter-node data movement on NVIDIA GPUs clusters with
Mellanox InfiniBand interconnect. Further, MVAPICH2-GDR 2.2a provides
efficient support for CUDA-Aware Non-Blocking Collectives (NBC) that
deliver the maximal overlap by combining GDR and Core-Direct features

Features, Enhancements, and Bug Fixes for MVAPICH2-GDR 2.2a are listed
here.

* Features and Enhancements (since MVAPICH2-GDR 2.1)
    - Based on MVAPICH2-2.2a
    - Support for efficient Non-Blocking Collectives for Device buffers
        - Exploiting Core-Direct and GPUDirect RDMA features
        - Maximal overlap of communication and computation on both CPU and GPU
    - Enabling Support on GPU-Clusters using regular OFED
      (without GPUDirect RDMA)
        - Capability to use IPC
        - Capability to use GDRCOPY
    - Tuning of IPC thresholds for multi-GPU nodes

* Bug Fixes (since MVAPICH2-GDR 2.1)
    - Fix IPC interaction with RMA Lock synchronization
        - Thanks to Akihiro Tabuchi at University of Tsukuba

MVAPICH2-GDR 2.2a release requires the following software to be
installed on your system:

  - Mellanox OFED 2.1 or later
  - NVIDIA Driver 331.20 or later
  - NVIDIA CUDA Toolkit 6.0 or later
  - Plugin module to enable GPUDirect RDMA
  - (Strongly recommended) NVIDIA GDRCOPY module

Further, MVAPICH2-GDR 2.2a enables support on GPU-Cluster using
regular OFED (without GPUDirect RDMA)

New features, enhancements and bug Fixes for OSU Micro-Benchmarks
(OMB) 5.1 are listed here.

* New Features & Enhancements (since OMB 5.0)
    - Introduce non-blocking collective v-variants as well as ialltoallw
        * osu_iallgatherv
        * osu_ialltoallv
        * osu_igatherv
        * osu_iscatterv
        * osu_ialltoallw
    - Add support for benchmarking GPU-Aware non-blocking collectives.
      Overlap can be computed using either CPU or GPU kernels.
        * osu_iallgather
        * osu_iallgatherv
        * osu_ialltoall
        * osu_ialltoallv
        * osu_ialltoallw
        * osu_ibcast
        * osu_igather
        * osu_igatherv
        * osu_iscatter
        * osu_iscatterv
    - Allow users the ability to specify zero warmup iterations

* Bug Fixes
    - fix openacc pragma

For downloading MVAPICH2-GDR 2.2a, OMB 5.1, associated user guide, and
sample performance numbers please visit the following URL:

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


All questions, feedback, bug reports, hints for performance tuning,
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: The number of downloads from the MVAPICH site has crossed 0.3
million (currently stands at more than 303,000). The MVAPICH team
would like to thank all its users and organizations!!
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