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===============================================================================
Changes in 3.3
===============================================================================
# CH4 Device: A new device layer implementation designed for low software
overheads. CH4 has experimental support for OFI and UCX network libraries,
and POSIX shared memory. Thanks to Intel, Mellanox, and RIKEN AICS for
participating in the CH4 coding effort.
# Added support for splitting communicators based on hardware
topology using info hints.
# Fixed SLURM integration in Hydra for new node list format.
# Added support for PMIx (https://pmix.github.io/pmix/) client
library in CH4 netmods. Note that you must use a compatible PMIx
server in this configuration.
# Better organization of collectives in the MPI layer. The new
scheme, which de-couples implementation from selection logic,
enables easier integration of additional algorithms.
# TSP collectives framework: A C++-template style framework for
collective algorithms is added to allow single collective
implementation to move data over generic or device-specific
transport functions.
# Improvements to derived datatype testing (DTPools -
https://wiki.mpich.org/mpich/index.php/DTPools).
# Added new "non-catastrophic" error codes to expose internal
resource exhaustion.
# Cleanup of whitespace (ch3 excluded) using the
maint/code-cleanup.sh script. For instructions on how to update
PRs/branches based on MPICH before the cleanup, see
https://github.com/pmodels/mpich/wiki/Code-Cleanup-Procedure.
# Removed the PAMI device and poe PMI client.
# 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/v3.2..v3.3b1
A list of bugs that have been fixed is available at the following
link:
https://github.com/pmodels/mpich/milestone/25?closed=1
===============================================================================
Changes in 3.2
===============================================================================
# Added support for MPI-3.1 features including nonblocking collective I/O,
address manipulation routines, thread-safety for MPI initialization,
pre-init functionality, and new MPI_T routines to look up variables
by name.
# Fortran 2008 bindings are enabled by default and fully supported.
# Added support for the Mellanox MXM InfiniBand interface. (thanks
to Mellanox for the code contribution).
# Added support for the Mellanox HCOLL interface for collectives.
(thanks to Mellanox for the code contribution).
# Significant stability improvements to the MPICH/portals4
implementation.
# Completely revamped RMA infrastructure including several
scalability improvements, performance improvements, and bug fixes.
# Added experimental support for Open Fabrics Interfaces (OFI) version 1.0.0.
https://github.com/ofiwg/libfabric (thanks to Intel for code contribution)
# The Myrinet MX network module, which had a life cyle from 1.1 till
3.1.2, has now been deleted.
# 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/v3.1.3..v3.2
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-3.2
===============================================================================
Changes in 3.1.3
===============================================================================
# Several enhancements to Portals4 support.
# Several enhancements to PAMI (thanks to IBM for the code contribution).
# Several enhancements to the CH3 RMA implementation.
# Several enhancements to ROMIO.
# Fixed deadlock in multi-threaded MPI_Comm_idup.
# 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/v3.1.2..v3.1.3
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-3.1.3
===============================================================================
Changes in 3.1.2
===============================================================================
# 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
===============================================================================
Changes in 3.1.1
===============================================================================
# Blue Gene/Q implementation supports MPI-3. This release contains a
functional and compliant Blue Gene/Q implementation of the MPI-3 standard.
Instructions to build on Blue Gene/Q are on the mpich.org wiki:
http://wiki.mpich.org/mpich/index.php/BGQ
# Fortran 2008 bindings (experimental). Build with --enable-fortran=all. Must have
a Fortran 2008 + TS 29113 capable compiler.
# Significant rework of MPICH library management and which symbols go
into which libraries. Also updated MPICH library names to make
them consistent with Intel MPI, Cray MPI and IBM PE MPI. Backward
compatibility links are provided for older mpich-based build
systems.
# The ROMIO "Blue Gene" driver has seen significant rework. We have separated
"file system" features from "platform" features, since GPFS shows up in more
places than just Blue Gene
# New ROMIO options for aggregator selection and placement on Blue Gene
# Optional new ROMIO two-phase algorithm requiring less communication for
certain workloads
# The old ROMIO optimization "deferred open" either stopped working or was
disabled on several platforms.
# Added support for powerpcle compiler. Patched libtool in MPICH to support
little-endian powerpc linux host.
# Fixed the prototype of the Reduce_local C++ binding. The previous
prototype was completely incorrect. Thanks to Jeff Squyres for
reporting the issue.
# The mpd process manager, which was deprecated and unsupported for
the past four major release series (1.3.x till 3.1), has now been
deleted. RIP.
# 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..v3.1.1
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-3.1.1
===============================================================================
Changes in 3.1
===============================================================================
# Implement runtime compatibility with MPICH-derived implementations 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.
# Upgraded hwloc to 1.8.
# Several improvements to the Hydra-SLURM integration.
# Several improvements to the Hydra process binding code. See the
Hydra wiki page for more information:
http://wiki.mpich.org/mpich/index.php/Using_the_Hydra_Process_Manager
# 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..v3.1
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
===============================================================================
Changes in 3.0.4
===============================================================================
# BUILD SYSTEM: Reordered the default compiler search to prefer Intel
and PG compilers over GNU compilers because of the performance
difference.
WARNING: If you do not explicitly specify the compiler you want
through CC and friends, this might break ABI for you relative to
the previous 3.0.x release.
# OVERALL: Added support to manage per-communicator eager-rendezvous
thresholds.
# PM/PMI: Performance improvements to the Hydra process manager on
large-scale systems by allowing for key/value caching.
# 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/v3.0.3..v3.0.4
===============================================================================
Changes in 3.0.3
===============================================================================
# RMA: Added a new mechanism for piggybacking RMA synchronization operations,
which improves the performance of several synchronization operations,
including Flush.
# RMA: Added an optimization to utilize the MPI_MODE_NOCHECK assertion in
passive target RMA to improve performance by eliminating a lock request
message.
# RMA: Added a default implementation of shared memory windows to CH3. This
adds support for this MPI 3.0 feature to the ch3:sock device.
# RMA: Fix a bug that resulted in an error when RMA operation request handles
where completed outside of a synchronization epoch.
# PM/PMI: Upgraded to hwloc-1.6.2rc1. This version uses libpciaccess
instead of libpci, to workaround the GPL license used by libpci.
# PM/PMI: Added support for the Cobalt process manager.
# BUILD SYSTEM: allow MPI_LONG_DOUBLE_SUPPORT to be disabled with a configure
option.
# FORTRAN: fix MPI_WEIGHTS_EMPTY in the Fortran bindings
# MISC: fix a bug in MPI_Get_elements where it could return incorrect values
# 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/v3.0.2..v3.0.3
===============================================================================
Changes in 3.0.2
===============================================================================
# PM/PMI: Upgrade to hwloc-1.6.1
# RMA: Performance enhancements for shared memory windows.
# COMPILER INTEGRATION: minor improvements and fixes to the clang static type
checking annotation macros.
# MPI-IO (ROMIO): improved error checking for user errors, contributed by IBM.
# MPI-3 TOOLS INTERFACE: new MPI_T performance variables providing information
about nemesis communication behavior and and CH3 message matching queues.
# TEST SUITE: "make testing" now also outputs a "summary.tap" file that can be
interpreted with standard TAP consumer libraries and tools. The
"summary.xml" format remains unchanged.
# GIT: This is the first release built from the new git repository at
git.mpich.org. A few build system mechanisms have changed because of this
switch.
# BUG FIX: resolved a compilation error related to LLONG_MAX that affected
several users (ticket #1776).
# BUG FIX: nonblocking collectives now properly make progress when MPICH is
configured with the ch3:sock channel (ticket #1785).
# 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/v3.0.1..v3.0.2
===============================================================================
Changes in 3.0.1
===============================================================================
# PM/PMI: Critical bug-fix in Hydra to work correctly in multi-node
tests.
# A full list of changes is available using:
svn log -r10790:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich-3.0.1
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich-3.0.1?action=follow_copy&rev=HEAD&stop_rev=10790&mode=follow_copy
===============================================================================
Changes in 3.0
===============================================================================
# MPI-3: All MPI-3 features are now implemented and the MPI_VERSION
bumped up to 3.0.
# OVERALL: Added support for ARM-v7 native atomics
# MPE: MPE is now separated out of MPICH and can be downloaded/used
as a separate package.
# PM/PMI: Upgraded to hwloc-1.6
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r10344:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich-3.0
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich-3.0?action=follow_copy&rev=HEAD&stop_rev=10344&mode=follow_copy
===============================================================================
Changes in 1.5
===============================================================================
# OVERALL: Nemesis now supports an "--enable-yield=..." configure
option for better performance/behavior when oversubscribing
processes to cores. Some form of this option is enabled by default
on Linux, Darwin, and systems that support sched_yield().
# OVERALL: Added support for Intel Many Integrated Core (MIC)
architecture: shared memory, TCP/IP, and SCIF based communication.
# OVERALL: Added support for IBM BG/Q architecture. Thanks to IBM
for the contribution.
# MPI-3: const support has been added to mpi.h, although it is
disabled by default. It can be enabled on a per-translation unit
basis with "#define MPICH2_CONST const".
# MPI-3: Added support for MPIX_Type_create_hindexed_block.
# MPI-3: The new MPI-3 nonblocking collective functions are now
available as "MPIX_" functions (e.g., "MPIX_Ibcast").
# MPI-3: The new MPI-3 neighborhood collective routines are now available as
"MPIX_" functions (e.g., "MPIX_Neighbor_allgather").
# MPI-3: The new MPI-3 MPI_Comm_split_type function is now available
as an "MPIX_" function.
# MPI-3: The new MPI-3 tools interface is now available as "MPIX_T_"
functions. This is a beta implementation right now with several
limitations, including no support for multithreading. Several
performance variables related to CH3's message matching are exposed
through this interface.
# MPI-3: The new MPI-3 matched probe functionality is supported via
the new routines MPIX_Mprobe, MPIX_Improbe, MPIX_Mrecv, and
MPIX_Imrecv.
# MPI-3: The new MPI-3 nonblocking communicator duplication routine,
MPIX_Comm_idup, is now supported. It will only work for
single-threaded programs at this time.
# MPI-3: MPIX_Comm_reenable_anysource support
# MPI-3: Native MPIX_Comm_create_group support (updated version of
the prior MPIX_Group_comm_create routine).
# MPI-3: MPI_Intercomm_create's internal communication no longer interferes
with point-to-point communication, even if point-to-point operations on the
parent communicator use the same tag or MPI_ANY_TAG.
# MPI-3: Eliminated the possibility of interference between
MPI_Intercomm_create and point-to-point messaging operations.
# Build system: Completely revamped build system to rely fully on
autotools. Parallel builds ("make -j8" and similar) are now supported.
# Build system: rename "./maint/updatefiles" --> "./autogen.sh" and
"configure.in" --> "configure.ac"
# JUMPSHOT: Improvements to Jumpshot to handle thousands of
timelines, including performance improvements to slog2 in such
cases.
# JUMPSHOT: Added navigation support to locate chosen drawable's ends
when viewport has been scrolled far from the drawable.
# PM/PMI: Added support for memory binding policies.
# PM/PMI: Various improvements to the process binding support in
Hydra. Several new pre-defined binding options are provided.
# PM/PMI: Upgraded to hwloc-1.5
# PM/PMI: Several improvements to PBS support to natively use the PBS
launcher.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r8478:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.5
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.5?action=follow_copy&rev=HEAD&stop_rev=8478&mode=follow_copy
===============================================================================
Changes in 1.4.1
===============================================================================
# OVERALL: Several improvements to the ARMCI API implementation
within MPICH2.
# Build system: Added beta support for DESTDIR while installing
MPICH2.
# PM/PMI: Upgrade hwloc to 1.2.1rc2.
# PM/PMI: Initial support for the PBS launcher.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r8675:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.4.1
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.4.1?action=follow_copy&rev=HEAD&stop_rev=8675&mode=follow_copy
===============================================================================
Changes in 1.4
===============================================================================
# OVERALL: Improvements to fault tolerance for collective
operations. Thanks to Rui Wang @ ICT for reporting several of these
issues.
# OVERALL: Improvements to the universe size detection. Thanks to
Yauheni Zelenko for reporting this issue.
# OVERALL: Bug fixes for Fortran attributes on some systems. Thanks
to Nicolai Stange for reporting this issue.
# OVERALL: Added new ARMCI API implementation (experimental).
# OVERALL: Added new MPIX_Group_comm_create function to allow
non-collective creation of sub-communicators.
# FORTRAN: Bug fixes in the MPI_DIST_GRAPH_ Fortran bindings.
# PM/PMI: Support for a manual "none" launcher in Hydra to allow for
higher-level tools to be built on top of Hydra. Thanks to Justin
Wozniak for reporting this issue, for providing several patches for
the fix, and testing it.
# PM/PMI: Bug fixes in Hydra to handle non-uniform layouts of hosts
better. Thanks to the MVAPICH group at OSU for reporting this issue
and testing it.
# PM/PMI: Bug fixes in Hydra to handle cases where only a subset of
the available launchers or resource managers are compiled
in. Thanks to Satish Balay @ Argonne for reporting this issue.
# PM/PMI: Support for a different username to be provided for each
host; this only works for launchers that support this (such as
SSH).
# PM/PMI: Bug fixes for using Hydra on AIX machines. Thanks to
Kitrick Sheets @ NCSA for reporting this issue and providing the
first draft of the patch.
# PM/PMI: Bug fixes in memory allocation/management for environment
variables that was showing up on older platforms. Thanks to Steven
Sutphen for reporting the issue and providing detailed analysis to
track down the bug.
# PM/PMI: Added support for providing a configuration file to pick
the default options for Hydra. Thanks to Saurabh T. for reporting
the issues with the current implementation and working with us to
improve this option.
# PM/PMI: Improvements to the error code returned by Hydra.
# PM/PMI: Bug fixes for handling "=" in environment variable values in
hydra.
# PM/PMI: Upgrade the hwloc version to 1.2.
# COLLECTIVES: Performance and memory usage improvements for MPI_Bcast
in certain cases.
# VALGRIND: Fix incorrect Valgrind client request usage when MPICH2 is
built for memory debugging.
# BUILD SYSTEM: "--enable-fast" and "--disable-error-checking" are once
again valid simultaneous options to configure.
# TEST SUITE: Several new tests for MPI RMA operations.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r7838:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.4
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.4?action=follow_copy&rev=HEAD&stop_rev=7838&mode=follow_copy
===============================================================================
Changes in 1.3.2
===============================================================================
# OVERALL: MPICH2 now recognizes the OSX mach_absolute_time as a
native timer type.
# OVERALL: Performance improvements to MPI_Comm_split on large
systems.
# OVERALL: Several improvements to error returns capabilities in the
presence of faults.
# PM/PMI: Several fixes and improvements to Hydra's process binding
capability.
# PM/PMI: Upgrade the hwloc version to 1.1.1.
# PM/PMI: Allow users to sort node lists allocated by resource
managers in Hydra.
# PM/PMI: Improvements to signal handling. Now Hydra respects Ctrl-Z
signals and passes on the signal to the application.
# PM/PMI: Improvements to STDOUT/STDERR handling including improved
support for rank prepending on output. Improvements to STDIN
handling for applications being run in the background.
# PM/PMI: Split the bootstrap servers into "launchers" and "resource
managers", allowing the user to pick a different resource manager
from the launcher. For example, the user can now pick the "SLURM"
resource manager and "SSH" as the launcher.
# PM/PMI: The MPD process manager is deprecated.
# PM/PMI: The PLPA process binding library support is deprecated.
# WINDOWS: Adding support for gfortran and 64-bit gcc libs.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r7457:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.3.2
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.3.2?action=follow_copy&rev=HEAD&stop_rev=7457&mode=follow_copy
===============================================================================
Changes in 1.3.1
===============================================================================
# OVERALL: MPICH2 is now fully compliant with the CIFTS FTB standard
MPI events (based on the draft standard).
# OVERALL: Major improvements to RMA performance for long lists of
RMA operations.
# OVERALL: Performance improvements for Group_translate_ranks.
# COLLECTIVES: Collective algorithm selection thresholds can now be controlled
at runtime via environment variables.
# ROMIO: PVFS error codes are now mapped to MPI error codes.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r7350:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.3.1
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.3.1?action=follow_copy&rev=HEAD&stop_rev=7350&mode=follow_copy
===============================================================================
Changes in 1.3
===============================================================================
# OVERALL: Initial support for fine-grained threading in
ch3:nemesis:tcp.
# OVERALL: Support for Asynchronous Communication Progress.
# OVERALL: The ssm and shm channels have been removed.
# OVERALL: Checkpoint/restart support using BLCR.
# OVERALL: Improved tolerance to process and communication failures
when error handler is set to MPI_ERRORS_RETURN. If a communication
operation fails (e.g., due to a process failure) MPICH2 will return
an error, and further communication to that process is not
possible. However, communication with other processes will still
proceed normally. Note, however, that the behavior collective
operations on communicators containing the failed process is
undefined, and may give incorrect results or hang some processes.
# OVERALL: Experimental support for inter-library dependencies.
# PM/PMI: Hydra is now the default process management framework
replacing MPD.
# PM/PMI: Added dynamic process support for Hydra.
# PM/PMI: Added support for LSF, SGE and POE in Hydra.
# PM/PMI: Added support for CPU and memory/cache topology aware
process-core binding.
# DEBUGGER: Improved support and bug fixes in the Totalview support.
# Build system: Replaced F90/F90FLAGS by FC/FCFLAGS. F90/F90FLAGS are
not longer supported in the configure.
# Multi-compiler support: On systems where C compiler that is used to
build mpich2 libraries supports multiple weak symbols and multiple aliases,
the Fortran binding built in the mpich2 libraries can handle different
Fortran compilers (than the one used to build mpich2). Details in README.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r5762:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.3
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.3?action=follow_copy&rev=HEAD&stop_rev=5762&mode=follow_copy
===============================================================================
Changes in 1.2.1
===============================================================================
# OVERALL: Improved support for fine-grained multithreading.
# OVERALL: Improved integration with Valgrind for debugging builds of MPICH2.
# PM/PMI: Initial support for hwloc process-core binding library in
Hydra.
# PM/PMI: Updates to the PMI-2 code to match the PMI-2 API and
wire-protocol draft.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r5425:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.2.1
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.2.1?action=follow_copy&rev=HEAD&stop_rev=5425&mode=follow_copy
===============================================================================
Changes in 1.2
===============================================================================
# OVERALL: Support for MPI-2.2
# OVERALL: Several fixes to Nemesis/MX.
# WINDOWS: Performance improvements to Nemesis/windows.
# PM/PMI: Scalability and performance improvements to Hydra using
PMI-1.1 process-mapping features.
# PM/PMI: Support for process-binding for hyperthreading enabled
systems in Hydra.
# PM/PMI: Initial support for PBS as a resource management kernel in
Hydra.
# PM/PMI: PMI2 client code is now officially included in the release.
# TEST SUITE: Support to run the MPICH2 test suite through valgrind.
# Several other minor bug fixes, memory leak fixes, and code cleanup.
A full list of changes is available using:
svn log -r5025:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.2
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.2?action=follow_copy&rev=HEAD&stop_rev=5025&mode=follow_copy
===============================================================================
Changes in 1.1.1p1
===============================================================================
- OVERALL: Fixed an invalid read in the dataloop code for zero count types.
- OVERALL: Fixed several bugs in ch3:nemesis:mx (tickets #744,#760;
also change r5126).
- BUILD SYSTEM: Several fixes for functionality broken in 1.1.1 release,
including MPICH2LIB_xFLAGS and extra libraries living in $LIBS instead of
$LDFLAGS. Also, '-lpthread' should no longer be duplicated in link lines.
- BUILD SYSTEM: MPICH2 shared libraries are now compatible with glibc versioned
symbols on Linux, such as those present in the MX shared libraries.
- BUILD SYSTEM: Minor tweaks to improve compilation under the nvcc CUDA
compiler.
- PM/PMI: Fix mpd incompatibility with python2.3 introduced in mpich2-1.1.1.
- PM/PMI: Several fixes to hydra, including memory leak fixes and process
binding issues.
- TEST SUITE: Correct invalid arguments in the coll2 and coll3 tests.
- Several other minor bug fixes, memory leak fixes, and code cleanup. A full
list of changes is available using:
svn log -r5032:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.1.1p1
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.1.1p1?action=follow_copy&rev=HEAD&stop_rev=5032&mode=follow_copy
===============================================================================
Changes in 1.1.1
===============================================================================
# OVERALL: Improved support for Boost MPI.
# PM/PMI: Significantly improved time taken by MPI_Init with Nemesis and MPD on
large numbers of processes.
# PM/PMI: Improved support for hybrid MPI-UPC program launching with
Hydra.
# PM/PMI: Improved support for process-core binding with Hydra.
# PM/PMI: Preliminary support for PMI-2. Currently supported only
with Hydra.
# Many other bug fixes, memory leak fixes and code cleanup. A full
list of changes is available using:
svn log -r4655:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.1.1
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.1.1?action=follow_copy&rev=HEAD&stop_rev=4655&mode=follow_copy
===============================================================================
Changes in 1.1
===============================================================================
- OVERALL: Added MPI 2.1 support.
- OVERALL: Nemesis is now the default configuration channel with a
completely new TCP communication module.
- OVERALL: Windows support for nemesis.
- OVERALL: Added a new Myrinet MX network module for nemesis.
- OVERALL: Initial support for shared-memory aware collective
communication operations. Currently MPI_Bcast, MPI_Reduce, MPI_Allreduce,
and MPI_Scan.
- OVERALL: Improved handling of MPI Attributes.
- OVERALL: Support for BlueGene/P through the DCMF library (thanks to
IBM for the patch).
- OVERALL: Experimental support for fine-grained multithreading
- OVERALL: Added dynamic processes support for Nemesis.
- OVERALL: Added automatic as well as statically runtime configurable
receive timeout variation for MPD (thanks to OSU for the patch).
- OVERALL: Improved performance for MPI_Allgatherv, MPI_Gatherv, and MPI_Alltoall.
- PM/PMI: Initial support for the new Hydra process management
framework (current support is for ssh, rsh, fork and a preliminary
version of slurm).
- ROMIO: Added support for MPI_Type_create_resized and
MPI_Type_create_indexed_block datatypes in ROMIO.
- ROMIO: Optimized Lustre ADIO driver (thanks to Weikuan Yu for
initial work and Sun for further improvements).
- Many other bug fixes, memory leak fixes and code cleanup. A full
list of changes is available using:
svn log -r813:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.1
... or at the following link:
https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.1?action=follow_copy&rev=HEAD&stop_rev=813&mode=follow_copy
===============================================================================
Changes in 1.0.7
===============================================================================
- OVERALL: Initial ROMIO device for BlueGene/P (the ADI device is also
added but is not configurable at this time).
- OVERALL: Major clean up for the propagation of user-defined and
other MPICH2 flags throughout the code.
- OVERALL: Support for STI Cell Broadband Engine.
- OVERALL: Added datatype free hooks to be used by devices
independently.
- OVERALL: Added device-specific timer support.
- OVERALL: make uninstall works cleanly now.
- ROMIO: Support to take hints from a config file
- ROMIO: more tests and bug fixes for nonblocking I/O
- PM/PMI: Added support to use PMI Clique functionality for process
managers that support it.
- PM/PMI: Added SLURM support to configure to make it transparent to
users.
- PM/PMI: SMPD Singleton Init support.
- WINDOWS: Fortran 90 support added.
- SCTP: Added MPICH_SCTP_NAGLE_ON support.
- MPE: Updated MPE logging API so that it is thread-safe (through
global mutex).
- MPE: Added infrastructure to piggyback argument data to MPI states.
- DOCS: Documentation creation now works correctly for VPATH builds.
- Many other bug fixes, memory leak fixes and code cleanup. A full
list of changes is available using:
svn log -r100:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/branches/release/MPICH2_1_0_7
===============================================================================
Changes in 1.0.6
===============================================================================
- Updates to the ch3:nemesis channel including preliminary support for
thread safety.
- Preliminary support for dynamic loading of ch3 channels (sock, ssm,
shm). See the README file for details.
- Singleton init now works with the MPD process manager.
- Fixes in MPD related to MPI-2 connect-accept.
- Improved support for MPI-2 generalized requests that allows true
nonblocking I/O in ROMIO.
- MPE changes:
* Enabled thread-safe MPI logging through global mutex.
* Enhanced Jumpshot to be more thread friendly
+ added simple statistics in the Legend windows.
* Added backtrace support to MPE on Solaris and glibc based systems,
e.g. Linux. This improves the output error message from the
Collective/Datatype checking library.
* Fixed the CLOG2 format so it can be used in serial (non-MPI) logging.
- Performance improvements for derived datatypes (including packing
and communication) through in-built loop-unrolling and buffer
alignment.
- Performance improvements for MPI_Gather when non-power-of-two
processes are used, and when a non-zero ranked root is performing the
gather.
- MPI_Comm_create works for intercommunicators.
- Enabled -O2 and equivalent compiler optimizations for supported
compilers by default (including GNU, Intel, Portland, Sun, Absoft,
IBM).
- Many other bug fixes, memory leak fixes and code cleanup. A full
list of changes is available at
www.mcs.anl.gov/mpi/mpich2/mpich2_1_0_6changes.htm.
===============================================================================
Changes in 1.0.5
===============================================================================
- An SCTP channel has been added to the CH3 device. This was
implemented by Brad Penoff and Mike Tsai, Univ. of British Columbia.
Their group's webpage is located at http://www.cs.ubc.ca/labs/dsg/mpi-sctp/ .
- Bugs related to dynamic processes have been fixed.
- Performance-related fixes have been added to derived datatypes and
collective communication.