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===============================================================================
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.
- Updates to the Nemesis channel
- Fixes to thread safety for the ch3:sock channel
- Many other bug fixes and code cleanup. A full list of changes is available
at www.mcs.anl.gov/mpi/mpich2/mpich2_1_0_5changes.htm .
===============================================================================
Changes in 1.0.4
===============================================================================
- For the ch3:sock channel, the default build of MPICH2 supports
thread safety. A separate build is not needed as before. However,
thread safety is enabled only if the user calls MPI_Init_thread with
MPI_THREAD_MULTIPLE. If not, no thread locks are called, so there
is no penalty.
- A new low-latency channel called Nemesis has been added. It can be
selected by specifying the option --with-device=ch3:nemesis.
Nemesis uses shared memory for intranode communication and various
networks for internode communication. Currently available networks
are TCP, GM and MX. Nemesis is still a work in progress. See the
README for more information about the channel.
- Support has been added for providing message queues to debuggers.
Configure with --enable-debuginfo to make this information available.
This is still a "beta" test version and has not been extensively tested.
- For systems with firewalls, the environment variable MPICH_PORT_RANGE can
be used to restrict the range of ports used by MPICH2. See the documentation
for more details.
- Withdrew obsolete modules, including the ib and rdma communication layers.
For Infiniband and MPICH2, please see
http://nowlab.cse.ohio-state.edu/projects/mpi-iba/
For other interconnects, please contact us at mpich2-maint@mcs.anl.gov .
- Numerous bug fixes and code cleanup. A full list of changes is available
at www.mcs.anl.gov/mpi/mpich2/mpich2_1_0_4changes.htm .
- Numerous new tests in the MPICH2 test suite.
- For developers, the way in which information is passed between the top
level configure and configures in the device, process management, and
related modules has been cleaned up. See the comments at the beginning
of the top-level configure.in for details. This change makes it easier
to interface other modules to MPICH2.
===============================================================================
Changes in 1.0.3
===============================================================================
- There are major changes to the ch3 device implementation. Old and
unsupported channels (essm, rdma) have been removed. The
internal interface between ch3 and the channels has been improved to
similify the process of adding a new channel (sharing existing code
where possible) and to improve performance. Further changes in this
internal interface are expected.
- Numerous bug fixes and code cleanup
Creation of intercommunicators and intracommunicators
from the intercommunicators created with Spawn and Connect/Accept
The computation of the alignment and padding of items within
structures now handles additional cases, including systems
where the alignment an padding depends on the type of the first
item in the structure
MPD recognizes wdir info keyword
gforker's mpiexec supports -env and -genv arguments for controlling
which environment variables are delivered to created processes
- While not a bug, to aid in the use of memory trace packages, MPICH2
tries to free all allocated data no later than when MPI_Finalize
returns.
- Support for DESTDIR in install targets
- Enhancements to SMPD
- In order to support special compiler flags for users that may be
different from those used to build MPICH2, the environment variables
MPI_CFLAGS, MPI_FFLAGS, MPI_CXXFLAGS, and MPI_F90FLAGS may be used
to specify the flags used in mpicc, mpif77, mpicxx, and mpif90
respectively. The flags CFLAGS, FFLAGS, CXXFLAGS, and F90FLAGS are
used in the building of MPICH2.
- Many enhancements to MPE
- Enhanced support for features and idiosyncracies of Fortran 77 and
Fortran 90 compilers, including gfortran, g95, and xlf
- Enhanced support for C++ compilers that do not fully support abstract
base classes
- Additional tests in the mpich2/tests/mpi
- New FAQ included (also available at
http://www.mcs.anl.gov/mpi/mpich2/faq.htm)
- Man pages for mpiexec and mpif90
- Enhancements for developers, including a more flexible and general
mechanism for inserting logging and information messages, controlable
with --mpich-dbg-xxx command line arguments or MPICH_DBG_XXX environment
variables.
- Note to developers:
This release contains many changes to the structure of the CH3
device implementation (in src/mpid/ch3), including signficant
reworking of the files (many files have been combined into fewer files
representing logical grouping of functions). The next release of
MPICH2 will contain even more significant changes to the device
structure as we introduce a new communication implementation.
===============================================================================
Changes in 1.0.2
===============================================================================
- Optimizations to the MPI-2 one-sided communication functions for the
sshm (scalable shared memory) channel when window memory is
allocated with MPI_Alloc_mem (for all three synchronization methods).
- Numerous bug fixes and code cleanup.
- Fixed memory leaks.
- Fixed shared library builds.
- Fixed performance problems with MPI_Type_create_subarray/darray
- The following changes have been made to MPE2:
- MPE2 now builds the MPI collective and datatype checking library
by default.
- SLOG-2 format has been upgraded to 2.0.6 which supports event drawables
and provides count of real drawables in preview drawables.
- new slog2 tools, slog2filter and slog2updater, which both are logfile
format convertors. slog2filter removes undesirable categories of
drawables as well as alters the slog2 file structure. slog2updater
is a slog2filter that reads in older logfile format, 2.0.5, and
writes out the latest format 2.0.6.
- The following changes have been made to MPD:
- Nearly all code has been replaced by new code that follows a more
object-oriented approach than before. This has not changed any
fundamental behavior or interfaces.
- There is info support in spawn and spawn_multiple for providing
parts of the environment for spawned processes such as search-path
and current working directory. See the Standard for the required
fields.
- mpdcheck has been enhanced to help users debug their cluster and
network configurations.
- CPickle has replaced marshal as the source module for dumps and loads.
- The mpigdb command has been replaced by mpiexec -gdb.
- Alternate interfaces can be used. See the Installer's Guide.
===============================================================================
Changes in 1.0.1
===============================================================================
- Copyright statements have been added to all code files, clearly identifying
that all code in the distribution is covered by the extremely flexible
copyright described in the COPYRIGHT file.
- The MPICH2 test suite (mpich2/test) can now be run against any MPI
implementation, not just MPICH2.
- The send and receive socket buffers sizes may now be changed by setting
MPICH_SOCKET_BUFFER_SIZE. Note: the operating system may impose a maximum
socket buffer size that prohibits MPICH2 from increasing the buffers to the
desire size. To raise the maximum allowable buffer size, please contact your
system administrator.
- Error handling throughout the MPI routines has been improved. The error
handling in some internal routines has been simplified as well, making the
routines easier to read.
- MPE (Jumpshot and CLOG logging) is now supported on Microsoft Windows.
- C applications built for Microsoft Windows may select the desired channels at
runtime.
- A program not started with mpiexec may become an MPI program by calling
MPI_Init. It will have an MPI_COMM_WORLD of size one. It may then call
other MPI routines, including MPI_COMM_SPAWN, to become a truly parallel
program. At present, the use of MPI_COMM_SPAWN and MPI_COMM_SPAWN_MULTIPLE
by such a process is only supported by the MPD process manager.
- Memory leaks in communicator allocation and the C++ binding have been fixed.
- Following GNU guidelines, the parts of the install step that checked the
installation have been moved to an installcheck target. Much of the
installation now supports the DESTDIR prefix.
- Microsoft Visual Studio projects have been added to make it possible to build
x86-64 version
- Problems with compilers and linkers that do not support weak symbols, which
are used to support the PMPI profiling interface, have been corrected.
- Handling of Fortran 77 and Fortran 90 compilers has been improved, including
support for g95.
- The Fortran stdcall interface on Microsoft Windows now supports character*.
- A bug in the OS X implementation of poll() caused the sock channel to hang.
A workaround has been put in place.
- Problems with installation under OS/X are now detected and corrected.
(Install breaks libraries that are more than 10 seconds old!)
- The following changes have been made to MPD:
- Sending a SIGINT to mpiexec/mpdrun, such as by typing control-C, now causes
SIGINT to be sent to the processes within the job. Previously, SIGKILL was
sent to the processes, preventing applications from catching the signal
and performing their own signal processing.
- The process for merging output has been improved.
- A new option, -ifhn, has been added to the machine file, allowing the user
to select the destination interface to be used for TCP communication. See
the User's Manual for details.
- The user may now select, via the "-s" option to mpiexec/mpdrun, which
processes receive input through stdin. stdin is immediately closed for all
processes not in set receiving input. This prevents processes not in the
set from hanging should they attempt to read from stdin.
- The MPICH2 Installer's Guide now contains an appendix on troubleshooting
problems with MPD.
- The following changes have been made to SMPD:
- On Windows machines, passwordless authentication (via SSPI) can now be used
to start processes on machines within a domain. This feature is a recent
addition, and should be considered experimental.
- On Windows machines, the -localroot option was added to mpiexec, allowing
processes on the local machines to perform GUI operations on the local
desktop.
- On Windows machines, network drive mapping is now supported via the -map
option to mpiexec.
- Three new GUI tools have been added for Microsoft Windows. These tools are
wrappers to the command line tools, mpiexec.exe and smpd.exe. wmpiexec
allows the user to run a job much in the way they with mpiexec. wmpiconfig
provides a means of setting various global options to the SMPD process
manager environment. wmpiregister encrypts the user's credentials and
saves them to the Windows Registry.
- The following changes have been made to MPE2:
- MPE2 no longer attempt to compile or link code during 'make install' to
validate the installation. Instead, 'make installcheck' may now be used to
verify that the MPE installation.
- MPE2 now supports DESTDIR.
- The sock channel now has preliminary support for MPI_THREAD_SERIALIZED and
MPI_THREAD_MULTIPLE on both UNIX and Microsoft Windows. We have performed
rudimentary testing; and while overall the results were very positive, known
issues do exist. ROMIO in particular experiences hangs in several places.
We plan to correct that in the next release. As always, please report any
difficulties you encounter.
- Another channel capable of communicating with both over sockets and shared
memory has been added. Unlike the ssm channel which waits for new data to
arrive by continuously polling the system in a busy loop, the essm channel
waits by blocking on an operating system event object. This channel is
experimental, and is only available for Microsoft Windows.
- The topology routines have been modified to allow the device to override the
default implementation. This allows the device to export knowledge of the
underlying physical topology to the MPI routines (Dims_create and the
reorder == true cases in Cart_create and Graph_create).
- New memory allocation macros, MPIU_CHK[PL]MEM_*(), have been added to help
prevent memory leaks. See mpich2/src/include/mpimem.h.
- New error reporting macros, MPIU_ERR_*, have been added to simplify the error
handling throughout the code, making the code easier to read. See
mpich2/src/include/mpierrs.h.
- Interprocess communication using the Sock interface (sock and ssm channels)
may now be bound to a particular destination interface using the environment
variable MPICH_INTERFACE_HOSTNAME. The variable needs to be set for each
process for which the destination interface is not the default interface.
(Other mechanisms for destination interface selection will be provided in
future releases.) Both MPD and SMPD provide a more simplistic mechanism for
specifying the interface. See the user documentation.
- Too many bug fixes to describe. Much thanks goes to the users who reported
bugs. Their patience and understanding as we attempted to recreate the
problems and solve them is greatly appreciated.
===============================================================================
Changes in 1.0
===============================================================================
- MPICH2 now works on Solaris.
- The User's Guide has been expanded considerably. The Installation Guide has
been expanded some as well.
- MPI_COMM_JOIN has been implemented; although like the other dynamic process
routines, it is only supported by the Sock channel.
- MPI_COMM_CONNECT and MPI_COMM_ACCEPT are now allowed to connect with remote
process to which they are already connected.
- Shared libraries can now be built (and used) on IA32 Linux with the GNU
compilers (--enable-sharedlibs=gcc), and on Solaris with the native Sun
Workshop compilers (--enable-sharedlibs=solaris). They may also work on
other operating systems with GCC, but that has not been tested. Previous
restrictions disallowing C++ and Fortran bindings when building shared
libraries have been removed.
- The dataloop and datatype contents code has been improved to address
alignment issues on all platforms.
- A bug in the datatype code, which handled zero block length cases
incorrectly, has been fixed.
- An segmentation fault in the datatype memory management, resulting from
freeing memory twice, has been fixed.
- The following changes were made to the MPD process manager:
- MPI_SPAWN_MULTIPLE now works with MPD.
- The arguments to the 'mpiexec' command supplied by the MPD have changed.
First, the -default option has been removed. Second, more flexible ways to
pass environment variables have been added.
- The commands 'mpdcheck' and 'testconfig' have been to installations using
MPD. These commands test the setup of the machines on which you wish to
run MPICH2 jobs. They help to identify misconfiguration, firewall issues,
and other communication problems.
- Support for MPI_APPNUM and MPI_UNIVERSE_SIZE has been added to the Simple
implementation of PMI and the MPD process manager.
- In general, error detection and recovery in MPD has improved.
- A new process manager, gforker, is now available. Like the forker process
manager, gforker spawns processes using fork(), and thus is quite useful on
SMPs machines. However, unlike forker, gforker supports all of the features
of a standard mpiexec, plus some. Therefore, It should be used in place of
the previous forker process manager, which is now deprecated.
- The following changes were made to ROMIO:
- The amount of duplicated ROMIO code in the close, resize, preallocate,
read, write, asynchronous I/O, and sync routines has been substantially
reduced.
- A bug in flattening code, triggered by nested datatypes, has been fixed.
- Some small memory leaks have been fixed.
- The error handling has been abstracted allowing different MPI
implementations to handle and report error conditions in their own way.
Using this abstraction, the error handling routines have been made
consistent with rest of MPICH2.
- AIO support has been cleaned up and unified. It now works correctly on
Linux, and is properly detected on old versions of AIX.
- A bug in MPI_File_seek code, and underlying support code, has been fixed.
- Support for PVFS2 has improved.
- Several dead file systems have been removed. Others, including HFS, SFS,
PIOFS, and Paragon, have been deprecated.
- MPE and CLOG have been updated to version 2.1. For more details, please see
src/mpe2/README.
- New macros for memory management were added to support function local
allocations (alloca), to rollback pending allocations when error conditions
are detected to avoid memory leaks, and to improve the conciseness of code
performing memory allocations.
- New error handling macros were added to make internal error handling code
more concise.
===============================================================================
Changes in 0.971
===============================================================================
- Code restricted by copyrights less flexible than the one described in the
COPYRIGHT file has been removed.
- Installation and User Guides have been added.
- The SMPD PMI Wire Protocol Reference Manual has been updated.
- To eliminate portability problems, common blocks in mpif.h that spanned
multiple lines were broken up into multiple common blocks each described on a
single line.
- A new command, mpich2version, was added to allow the user to obtain
information about the MPICH2 installation. This command is currently a
simple shell script. We anticipate that the mpich2version command will
eventually provide additional information such as the patches applied and the
date of the release.
- The following changes were made to MPD2:
- Support was added for MPI's "singleton init", in which a single
process started in the normal way (i.e., not by mpiexec or mpirun)
becomes an MPI process with an MPI_COMM_WORLD of size one by
calling MPI_Init. After this the process can call other MPI
functions, including MPI_Comm_spawn.
- The format for some of the arguments to mpiexec have changed,
especially for passing environment variables to MPI processes.
- In addition to miscellaneous hardening, better error checking and
messages have been added.
- The install process has been improved. In particular, configure
has been updated to check for a working install program and supply
it's own installation script (install.sh) if necessary.
- A new program, mpdcheck, has been added to help diagnose machine
configurations that might be erroneous or at least confusing to
mpd.
- Runtime version checking has been added to insure that the Simple
implementation of PMI linked into the application and the MPD
process manager being used to run that application are compatible.
- Minor improvements have been made to mpdboot.
- Support for the (now deprecated) BNR interface has been added to
allow MPICH1 programs to also be run via MPD2.
- Shared libraries are now supported on Linux systems using the GNU compilers
with the caveat that C++ support must be disabled (--disable-cxx).
- The CH3 interface and device now provide a mechanism for using RDMA (remote
direct memory access) to transfer data between processes.
- Logging capabilities for MPI and internal routines have been readded. See
the documentation in doc/logging for details.
- A "meminit" option was added to --enable-g to force all bytes associated with
a structure or union to be initialized prior to use. This prevents programs
like Valgrind from complaining about uninitialized accesses.
- The dist-with-version and snap targets in the top-level Makefile.sm now
properly produce mpich2-<ver>/maint/Version instead of mpich2-<ver>/Version.
In addition, they now properly update the VERSION variable in Makefile.sm
without clobbering the sed line that performs the update.
- The dist and snap targets in the top-level Makefile.sm now both use the
dist-with-version target to avoid inconsistencies.
- The following changes were made to simplemake:
- The environment variables DEBUG, DEBUG_DIRS, and DEBUG_CONFDIR can now be
used to control debugging output.
- Many fixes were made to make simplemake so that it would run cleanly with
perl -w.
- Installation of *all* files from a directory is now possible (example,
installing all of the man pages).
- The clean targets now remove the cache files produced by newer versions of
autoconf.