In a very close timing, both the Open MPI group and the MVAPICH team released new versions of their open source MPIs. The Open MPI Team announced the release of Open MPI version 1.4.5. This release is mainly a bug fix release over the v1.4.4 release. Version 1.4.5 can be downloaded from the main Open MPI web site and it contains an improve management of the registration cache, a fix for SLURM cpus-per-task allocation, as well as some other bug fixes.
The MVAPICH team announced the release of MVAPICH2 1.8a2 and OSU Micro-Benchmarks (OMB) 3.5.1. The new features include support for collective communication from GPU buffers, non-contiguous datatype support in point-to-point and collective communication from GPU buffers, efficient GPU-GPU transfers within a node using CUDA IPC, adjust shared-memory communication block size at runtime, enable XRC by default at configure time, new shared memory design for enhanced intra-node small message performance and SLURM integration with mpiexec.mpirun_rsh to use SLURM allocated hosts without specifying a hostfile. For downloading MVAPICH2 1.8a2, OMB 3.5.1, associated user guide,
quick start guide, and accessing the SVN, you can check http://mvapich.cse.ohio-state.edu.
Congrats for the teams for the new releases.