[mpich-announce] Announcing the availability of mpich-3.1rc2

[Wesley Bland]

The MPICH team is pleased to announce the availability of a new preview
release (mpich-3.1rc2). This is a release candidate of the upcoming MPICH 
3.1, and adds several capabilities including a fully integrated source for 
vanilla MPICH and the IBM PE/BG device, several improvements for the Intel 
Xeon Phi architecture, improved support for fault tolerance, improvements to 
MPI RMA for shared memory communication, MPI large count 64-bit safety, and 
MPI Tools interface improvements. This release also fixes several bugs present 
in 3.0.4.

http://www.mpich.org

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

Regards,

The MPICH Team

===============================================================================
                               Changes in 3.1rc2
===============================================================================

# Implement runtime compatibility with MPICH-derived impelmentations as per
   the ABI Compatibility Initiative (see www.mpich.org/abi for more information).

# Integrated MPICH-PAMI code base for Blue Gene/Q and other IBM
  platforms.

# Several improvements to the SCIF netmod.  (code contribution from
  Intel).

# Major revamp of the MPI_T interface added in MPI-3.

# Added environment variables to control a lot more capabilities for
  collectives.  See the README.envvar file for more information.

# Allow non-blocking collectives and fault tolerance at the same
  time. The option MPIR_PARAM_ENABLE_COLL_FT_RET has been deprecated as
  it is no longer necessary.

# Improvements to MPI_WIN_ALLOCATE to internally allocate shared
  memory between processes on the same node.

# Performance improvements for MPI RMA operations on shared memory
  for MPI_WIN_ALLOCATE and MPI_WIN_ALLOCATE_SHARED.

# Enable shared library builds by default.

# Allow non-blocking collectives and fault tolerance at the same
  time. The option MPIR_PARAM_ENABLE_COLL_FT_RET has been deprecated as
  it is no longer necessary.

# Improvements to MPI_WIN_ALLOCATE to internally allocate shared
  memory between processes on the same node.

# Performance improvements for MPI RMA operations on shared memory
  for MPI_WIN_ALLOCATE and MPI_WIN_ALLOCATE_SHARED.

# Enable shared library builds by default.

# Upgraded hwloc to 1.7.2.

# Several improvements to the Hydra-SLURM integration.

# MPICH now supports operations on very large datatypes (those that describe
  more than 32 bits of data).  This work also allows MPICH to fully support
  MPI-3's introduction of MPI_Count.

# 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/v3.0.4..v3.1rc2