The MPICH team is pleased to announce the availability of a new stable release mpich-3.1.2.

This is a stable release that adds significant enhancements to the BG/Q device, especially for RMA and shared memory functionality. It also contains enhancements to ROMIO and fixes several bugs present in 3.1.1.

All production environments are encouraged to upgrade to this release.

More information about the release can be found on the MPICH website:

http://www.mpich.org

A list of changes in this release is included at the end of this email.

Regards,

The MPICH Team

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Changes in 3.1.2

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# Significant enhancements to the BG/Q device, especially for RMA and

shared memory functionality.

# Several enhancements to ROMIO.

# Upgraded to hwloc-1.9.

# Added more Fortran 2008 (F08) tests and fixed a few F08 binding bugs.

Now all MPICH F90 tests have been ported to F08.

# Updated weak alias support to align with gcc-4.x

# Minor enhancements to the CH3 RMA implementation.

# Better implementation of MPI_Allreduce for intercommunicator.

# Added environment variables to control memory tracing overhead.

# Added flags to enable C99 mode with Solaris compilers.

# Updated implementation of MPI-T CVARs of type MPI_CHAR, as interpreted

in MPI-3.0 Errata.

# Several other minor bug fixes, memory leak fixes, and code cleanup.

A full list of changes is available at the following link:

http://git.mpich.org/mpich.git/shortlog/v3.1.1..v3.1.2

A full list of bugs that have been fixed is available at the

following link:

https://trac.mpich.org/projects/mpich/query?status=closed&group=resolution&milestone=mpich-3.1.2