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NEWS
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NEWS
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Copyright (c) 2004-2010 The Trustees of Indiana University and Indiana
University Research and Technology
Corporation. All rights reserved.
Copyright (c) 2004-2006 The University of Tennessee and The University
of Tennessee Research Foundation. All rights
reserved.
Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
University of Stuttgart. All rights reserved.
Copyright (c) 2004-2006 The Regents of the University of California.
All rights reserved.
Copyright (c) 2006-2018 Cisco Systems, Inc. All rights reserved.
Copyright (c) 2006 Voltaire, Inc. All rights reserved.
Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
Use is subject to license terms.
Copyright (c) 2006-2017 Los Alamos National Security, LLC. All rights
reserved.
Copyright (c) 2010-2017 IBM Corporation. All rights reserved.
Copyright (c) 2012 Oak Ridge National Labs. All rights reserved.
Copyright (c) 2012 Sandia National Laboratories. All rights reserved.
Copyright (c) 2012 University of Houston. All rights reserved.
Copyright (c) 2013 NVIDIA Corporation. All rights reserved.
Copyright (c) 2013-2018 Intel, Inc. All rights reserved.
Copyright (c) 2018 Amazon.com, Inc. or its affiliates. All Rights
reserved.
$COPYRIGHT$
Additional copyrights may follow
$HEADER$
===========================================================================
This file contains the main features as well as overviews of specific
bug fixes (and other actions) for each version of Open MPI since
version 1.0.
As more fully described in the "Software Version Number" section in
the README file, Open MPI typically releases two separate version
series simultaneously. Since these series have different goals and
are semi-independent of each other, a single NEWS-worthy item may be
introduced into different series at different times. For example,
feature F was introduced in the vA.B series at version vA.B.C, and was
later introduced into the vX.Y series at vX.Y.Z.
The first time feature F is released, the item will be listed in the
vA.B.C section, denoted as:
(** also to appear: X.Y.Z) -- indicating that this item is also
likely to be included in future release
version vX.Y.Z.
When vX.Y.Z is later released, the same NEWS-worthy item will also be
included in the vX.Y.Z section and be denoted as:
(** also appeared: A.B.C) -- indicating that this item was previously
included in release version vA.B.C.
Master (not on release branches yet)
------------------------------------
**********************************************************************
* PRE-DEPRECATION WARNING: MPIR Support
*
* As was announced in summer 2017, Open MPI is deprecating support for
* MPIR-based tools beginning with the future release of OMPI v5.0, with
* full removal of that support tentatively planned for OMPI v6.0.
*
* This serves as a pre-deprecation warning to provide tools developers
* with sufficient time to migrate to PMIx. Support for PMIx-based
* tools will be rolled out during the OMPI v4.x series. No runtime
* deprecation warnings will be output during this time.
*
* Runtime deprecation warnings will be output beginning with the OMPI v5.0
* release whenever MPIR-based tools connect to Open MPI's mpirun/mpiexec
* launcher.
**********************************************************************
- Fix rank-by algorithms to properly rank by object and span
- Do not build Open SHMEM layer when there are no SPMLs available.
Currently, this means the Open SHMEM layer will only build if
a MXM or UCX library is found.
3.1.2 -- August, 2018
------------------------
- A subtle race condition bug was discovered in the "vader" BTL
(shared memory communications) that, in rare instances, can cause
MPI processes to crash or incorrectly classify (or effectively drop)
an MPI message sent via shared memory. If you are using the "ob1"
PML with "vader" for shared memory communication (note that vader is
the default for shared memory communication with ob1), you need to
upgrade to v3.1.2 or later to fix this issue. You may also upgrade
to the following versions to fix this issue:
- Open MPI v2.1.5 (expected end of August, 2018) or later in the
v2.1.x series
- Open MPI v3.0.1 (released March, 2018) or later in the v3.0.x
series
- Assorted Portals 4.0 bug fixes.
- Fix for possible data corruption in MPI_BSEND.
- Move shared memory file for vader btl into /dev/shm on Linux.
- Fix for MPI_ISCATTER/MPI_ISCATTERV Fortran interfaces with MPI_IN_PLACE.
- Upgrade PMIx to v2.1.3.
- Numerous One-sided bug fixes.
- Fix for race condition in uGNI BTL.
- Improve handling of large number of interfaces with TCP BTL.
- Numerous UCX bug fixes.
3.1.1 -- June, 2018
-------------------
- Fix potential hang in UCX PML during MPI_FINALIZE
- Update internal PMIx to v2.1.2rc2 to fix forward version compatibility.
- Add new MCA parameter osc_sm_backing_store to allow users to specify
where in the filesystem the backing file for the shared memory
one-sided component should live. Defaults to /dev/shm on Linux.
- Fix potential hang on non-x86 platforms when using builds with
optimization flags turned off.
- Disable osc/pt2pt when using MPI_THREAD_MULTIPLE due to numerous
race conditions in the component.
- Fix dummy variable names for the mpi and mpi_f08 Fortran bindings to
match the MPI standard. This may break applications which use
name-based parameters in Fortran which used our internal names
rather than those documented in the MPI standard.
- Revamp Java detection to properly handle new Java versions which do
not provide a javah wrapper.
- Fix RMA function signatures for use-mpi-f08 bindings to have the
asynchonous property on all buffers.
- Improved configure logic for finding the UCX library.
3.1.0 -- May, 2018
------------------
- Various OpenSHMEM bug fixes.
- Properly handle array_of_commands argument to Fortran version of
MPI_COMM_SPAWN_MULTIPLE.
- Fix bug with MODE_SEQUENTIAL and the sharedfp MPI-IO component.
- Use "javac -h" instead of "javah" when building the Java bindings
with a recent version of Java.
- Fix mis-handling of jostepid under SLURM that could cause problems
with PathScale/OmniPath NICs.
- Disable the POWER 7/BE block in configure. Note that POWER 7/BE is
still not a supported platform, but it is no longer automatically
disabled. See
https://github.com/open-mpi/ompi/issues/4349#issuecomment-374970982
for more information.
- The output-filename option for mpirun is now converted to an
absolute path before being passed to other nodes.
- Add monitoring component for PML, OSC, and COLL to track data
movement of MPI applications. See
ompi/mca/commmon/monitoring/HowTo_pml_monitoring.tex for more
information about the monitoring framework.
- Add support for communicator assertions: mpi_assert_no_any_tag,
mpi_assert_no_any_source, mpi_assert_exact_length, and
mpi_assert_allow_overtaking.
- Update PMIx to version 2.1.1.
- Update hwloc to 1.11.7.
- Many one-sided behavior fixes.
- Improved performance for Reduce and Allreduce using Rabenseifner's algorithm.
- Revamped mpirun --help output to make it a bit more manageable.
- Portals4 MTL improvements: Fix race condition in rendezvous protocol and
retry logic.
- UCX OSC: initial implementation.
- UCX PML improvements: add multi-threading support.
- Yalla PML improvements: Fix error with irregular contiguous datatypes.
- Openib BTL: disable XRC support by default.
- TCP BTL: Add check to detect and ignore connections from processes
that aren't MPI (such as IDS probes) and verify that source and
destination are using the same version of Open MPI, fix issue with very
large message transfer.
- ompi_info parsable output now escapes double quotes in values, and
also quotes values can contains colons. Thanks to Lev Givon for the
suggestion.
- CUDA-aware support can now handle GPUs within a node that do not
support CUDA IPC. Earlier versions would get error and abort.
- Add a mca parameter ras_base_launch_orted_on_hn to allow for launching
MPI processes on the same node where mpirun is executing using a separate
orte daemon, rather than the mpirun process. This may be useful to set to
true when using SLURM, as it improves interoperability with SLURM's signal
propagation tools. By default it is set to false, except for Cray XC systems.
- Remove LoadLeveler RAS support.
- Remove IB XRC support from the OpenIB BTL due to lack of support.
- Add functionality for IBM s390 platforms. Note that regular
regression testing does not occur on the s390 and it is not
considered a supported platform.
- Remove support for big endian PowerPC.
- Remove support for XL compilers older than v13.1.
- Remove support for atomic operations using MacOS atomics library.
3.0.2 -- June, 2018
-------------------
- Disable osc/pt2pt when using MPI_THREAD_MULTIPLE due to numerous
race conditions in the component.
- Fix dummy variable names for the mpi and mpi_f08 Fortran bindings to
match the MPI standard. This may break applications which use
name-based parameters in Fortran which used our internal names
rather than those documented in the MPI standard.
- Fixed MPI_SIZEOF in the "mpi" Fortran module for the NAG compiler.
- Fix RMA function signatures for use-mpi-f08 bindings to have the
asynchonous property on all buffers.
- Fix Fortran MPI_COMM_SPAWN_MULTIPLE to properly follow the count
length argument when parsing the array_of_commands variable.
- Revamp Java detection to properly handle new Java versions which do
not provide a javah wrapper.
- Improved configure logic for finding the UCX library.
- Add support for HDR InfiniBand link speeds.
- Disable the POWER 7/BE block in configure. Note that POWER 7/BE is
still not a supported platform, but it is no longer automatically
disabled. See
https://github.com/open-mpi/ompi/issues/4349#issuecomment-374970982
for more information.
3.0.1 -- March, 2018
----------------------
- Fix ability to attach parallel debuggers to MPI processes.
- Fix a number of issues in MPI I/O found by the HDF5 test suite.
- Fix (extremely) large message transfers with shared memory.
- Fix out of sequence bug in multi-NIC configurations.
- Fix stdin redirection bug that could result in lost input.
- Disable the LSF launcher if CSM is detected.
- Plug a memory leak in MPI_Mem_free(). Thanks to Philip Blakely for reporting.
- Fix the tree spawn operation when the number of nodes is larger than the radix.
Thanks to Carlos Eduardo de Andrade for reporting.
- Fix Fortran 2008 macro in MPI extensions. Thanks to Nathan T. Weeks for
reporting.
- Add UCX to list of interfaces that OpenSHMEM will use by default.
- Add --{enable|disable}-show-load-errors-by-default to control
default behavior of the load errors option.
- OFI MTL improvements: handle empty completion queues properly, fix
incorrect error message around fi_getinfo(), use default progress
option for provider by default, Add support for reading multiple
CQ events in ofi_progress.
- PSM2 MTL improvements: Allow use of GPU buffers, thread fixes.
- Numerous corrections to memchecker behavior.
- Add a mca parameter ras_base_launch_orted_on_hn to allow for launching
MPI processes on the same node where mpirun is executing using a separate
orte daemon, rather than the mpirun process. This may be useful to set to
true when using SLURM, as it improves interoperability with SLURM's signal
propagation tools. By default it is set to false, except for Cray XC systems.
- Fix a problem reported on the mailing separately by Kevin McGrattan and Stephen
Guzik about consistency issues on NFS file systems when using OMPIO. This fix
also introduces a new mca parameter fs_ufs_lock_algorithm which allows to
control the locking algorithm used by ompio for read/write operations. By
default, ompio does not perfom locking on local UNIX file systems, locks the
entire file per operation on NFS file systems, and selective byte-range
locking on other distributed file systems.
- Add an mca parameter pmix_server_usock_connections to allow mpirun to
support applications statically built against the Open MPI v2.x release,
or installed in a container along with the Open MPI v2.x libraries. It is
set to false by default.
3.0.0 -- September, 2017
------------------------
Major new features:
- Use UCX allocator for OSHMEM symmetric heap allocations to optimize intra-node
data transfers. UCX SPML only.
- Use UCX multi-threaded API in the UCX PML. Requires UCX 1.0 or later.
- Added support for Flux PMI
- Update embedded PMIx to version 2.1.0
- Update embedded hwloc to version 1.11.7
Changes in behavior compared to prior versions:
- Per Open MPI's versioning scheme (see the README), increasing the
major version number to 3 indicates that this version is not
ABI-compatible with prior versions of Open MPI. In addition, there may
be differences in MCA parameter names and defaults from previous releases.
Command line options for mpirun and other commands may also differ from
previous versions. You will need to recompile MPI and OpenSHMEM applications
to work with this version of Open MPI.
- With this release, Open MPI supports MPI_THREAD_MULTIPLE by default.
- New configure options have been added to specify the locations of libnl
and zlib.
- A new configure option has been added to request Flux PMI support.
- The help menu for mpirun and related commands is now context based.
"mpirun --help compatibility" generates the help menu in the same format
as previous releases.
Removed legacy support:
- AIX is no longer supported.
- Loadlever is no longer supported.
- OpenSHMEM currently supports the UCX and MXM transports via the ucx and ikrit
SPMLs respectively.
- Remove IB XRC support from the OpenIB BTL due to lack of support.
- Remove support for big endian PowerPC.
- Remove support for XL compilers older than v13.1
Known issues:
- MPI_Connect/accept between applications started by different mpirun
commands will fail, even if ompi-server is running.
2.1.5 -- August 2018
--------------------
- A subtle race condition bug was discovered in the "vader" BTL
(shared memory communications) that, in rare instances, can cause
MPI processes to crash or incorrectly classify (or effectively drop)
an MPI message sent via shared memory. If you are using the "ob1"
PML with "vader" for shared memory communication (note that vader is
the default for shared memory communication with ob1), you need to
upgrade to v2.1.5 to fix this issue. You may also upgrade to the
following versions to fix this issue:
- Open MPI v3.0.1 (released March, 2018) or later in the v3.0.x
series
- Open MPI v3.1.2 (expected end of August, 2018) or later
- A link issue was fixed when the UCX library was not located in the
linker-default search paths.
2.1.4 -- August, 2018
---------------------
Bug fixes/minor improvements:
- Disable the POWER 7/BE block in configure. Note that POWER 7/BE is
still not a supported platform, but it is no longer automatically
disabled. See
https://github.com/open-mpi/ompi/issues/4349#issuecomment-374970982
for more information.
- Fix bug with request-based one-sided MPI operations when using the
"rdma" component.
- Fix issue with large data structure in the TCP BTL causing problems
in some environments. Thanks to @lgarithm for reporting the issue.
- Minor Cygwin build fixes.
- Minor fixes for the openib BTL:
- Support for the QLogic RoCE HCA
- Support for the Boradcom Cumulus RoCE HCA
- Enable support for HDR link speeds
- Fix MPI_FINALIZED hang if invoked from an attribute destructor
during the MPI_COMM_SELF destruction in MPI_FINALIZE. Thanks to
@AndrewGaspar for reporting the issue.
- Java fixes:
- Modernize Java framework detection, especially on OS X/MacOS.
Thanks to Bryce Glover for reporting and submitting the fixes.
- Prefer "javac -h" to "javah" to support newer Java frameworks.
- Fortran fixes:
- Use conformant dummy parameter names for Fortran bindings. Thanks
to Themos Tsikas for reporting and submitting the fixes.
- Build the MPI_SIZEOF() interfaces in the "TKR"-style "mpi" module
whenever possible. Thanks to Themos Tsikas for reporting the
issue.
- Fix array of argv handling for the Fortran bindings of
MPI_COMM_SPAWN_MULTIPLE (and its associated man page).
- Make NAG Fortran compiler support more robust in configure.
- Disable the "pt2pt" one-sided MPI component when MPI_THREAD_MULTIPLE
is used. This component is simply not safe in MPI_THREAD_MULTIPLE
scenarios, and will not be fixed in the v2.1.x series.
- Make the "external" hwloc component fail gracefully if it is tries
to use an hwloc v2.x.y installation. hwloc v2.x.y will not be
supported in the Open MPI v2.1.x series.
- Fix "vader" shared memory support for messages larger than 2GB.
Thanks to Heiko Bauke for the bug report.
- Configure fixes for external PMI directory detection. Thanks to
Davide Vanzo for the report.
2.1.3 -- March, 2018
--------------------
Bug fixes/minor improvements:
- Update internal PMIx version to 1.2.5.
- Fix a problem with ompi_info reporting using param option.
Thanks to Alexander Pozdneev for reporting.
- Correct PMPI_Aint_{add|diff} to be functions (not subroutines)
in the Fortran mpi_f08 module.
- Fix a problem when doing MPI I/O using data types with large
extents in conjunction with MPI_TYPE_CREATE_SUBARRAY. Thanks to
Christopher Brady for reporting.
- Fix a problem when opening many files using MPI_FILE_OPEN.
Thanks to William Dawson for reporting.
- Fix a problem with debuggers failing to attach to a running job.
Thanks to Dirk Schubert for reporting.
- Fix a problem when using madvise and the OpenIB BTL. Thanks to
Timo Bingmann for reporting.
- Fix a problem in the Vader BTL that resulted in failures of
IMB under certain circumstances. Thanks to Nicolas Morey-
Chaisemartin for reporting.
- Fix a problem preventing Open MPI from working under Cygwin.
Thanks to Marco Atzeri for reporting.
- Reduce some verbosity being emitted by the USNIC BTL under certain
circumstances. Thanks to Peter Forai for reporting.
- Fix a problem with misdirection of SIGKILL. Thanks to Michael Fern
for reporting.
- Replace use of posix_memalign with malloc for small allocations. Thanks
to Ben Menaude for reporting.
- Fix a problem with Open MPI's out of band TCP network for file descriptors
greater than 32767. Thanks to Wojtek Wasko for reporting and fixing.
- Plug a memory leak in MPI_Mem_free(). Thanks to Philip Blakely for reporting.
2.1.2 -- September, 2017
------------------------
Bug fixes/minor improvements:
- Update internal PMIx version to 1.2.3.
- Fix some problems when using the NAG Fortran compiler to build Open MPI
and when using the compiler wrappers. Thanks to Neil Carlson for reporting.
- Fix a compilation problem with the SM BTL. Thanks to Paul Hargrove for
reporting.
- Fix a problem with MPI_IALLTOALLW when using zero-length messages.
Thanks to Dahai Guo for reporting.
- Fix a problem with C11 generic type interface for SHMEM_G. Thanks
to Nick Park for reporting.
- Switch to using the lustreapi.h include file when building Open MPI
with Lustre support.
- Fix a problem in the OB1 PML that led to hangs with OSU collective tests.
- Fix a progression issue with MPI_WIN_FLUSH_LOCAL. Thanks to
Joseph Schuchart for reporting.
- Fix an issue with recent versions of PBSPro requiring libcrypto.
Thanks to Petr Hanousek for reporting.
- Fix a problem when using MPI_ANY_SOURCE with MPI_SENDRECV.
- Fix an issue that prevented signals from being propagated to ORTE
daemons.
- Ensure that signals are forwarded from ORTE daemons to all processes
in the process group created by the daemons. Thanks to Ted Sussman
for reporting.
- Fix a problem with launching a job under a debugger. Thanks to
Greg Lee for reporting.
- Fix a problem with Open MPI native I/O MPI_FILE_OPEN when using
a communicator having an associated topology. Thanks to
Wei-keng Liao for reporting.
- Fix an issue when using MPI_ACCUMULATE with derived datatypes.
- Fix a problem with Fortran bindings that led to compilation errors
for user defined reduction operations. Thanks to Nathan Weeks for
reporting.
- Fix ROMIO issues with large writes/reads when using NFS file systems.
- Fix definition of Fortran MPI_ARGV_NULL and MPI_ARGVS_NULL.
- Enable use of the head node of a SLURM allocation on Cray XC systems.
- Fix a problem with synchronous sends when using the UCX PML.
- Use default socket buffer size to improve TCP BTL performance.
- Add a mca parameter ras_base_launch_orted_on_hn to allow for launching
MPI processes on the same node where mpirun is executing using a separate
orte daemon, rather than the mpirun process. This may be useful to set to
true when using SLURM, as it improves interoperability with SLURM's signal
propagation tools. By default it is set to false, except for Cray XC systems.
- Fix --without-lsf when lsf is installed in the default search path.
- Remove support for big endian PowerPC.
- Remove support for XL compilers older than v13.1
- Remove IB XRC support from the OpenIB BTL due to loss of maintainer.
2.1.1 -- April, 2017
--------------------
Bug fixes/minor improvements:
- Fix a problem with one of Open MPI's fifo data structures which led to
hangs in a make check test. Thanks to Nicolas Morey-Chaisemartin for
reporting.
- Add missing MPI_AINT_ADD/MPI_AINT_DIFF function definitions to mpif.h.
Thanks to Aboorva Devarajan for reporting.
- Fix the error return from MPI_WIN_LOCK when rank argument is invalid.
Thanks to Jeff Hammond for reporting and fixing this issue.
- Fix a problem with mpirun/orterun when started under a debugger. Thanks
to Gregory Leff for reporting.
- Add configury option to disable use of CMA by the vader BTL. Thanks
to Sascha Hunold for reporting.
- Add configury check for MPI_DOUBLE_COMPLEX datatype support.
Thanks to Alexander Klein for reporting.
- Fix memory allocated by MPI_WIN_ALLOCATE_SHARED to
be 64 bit aligned. Thanks to Joseph Schuchart for
reporting.
- Update MPI_WTICK man page to reflect possibly higher
resolution than 10e-6. Thanks to Mark Dixon for
reporting
- Add missing MPI_T_PVAR_SESSION_NULL definition to mpi.h
include file. Thanks to Omri Mor for this contribution.
- Enhance the Open MPI spec file to install modulefile in /opt
if installed in a non-default location. Thanks to Kevin
Buckley for reporting and supplying a fix.
- Fix a problem with conflicting PMI symbols when linking statically.
Thanks to Kilian Cavalotti for reporting.
Known issues (to be addressed in v2.1.2):
- See the list of fixes slated for v2.1.2 here:
https://github.com/open-mpi/ompi/milestone/28
2.1.0 -- March, 2017
--------------------
Major new features:
- The main focus of the Open MPI v2.1.0 release was to update to PMIx
v1.2.1. When using PMIx (e.g., via mpirun-based launches, or via
direct launches with recent versions of popular resource managers),
launch time scalability is improved, and the run time memory
footprint is greatly decreased when launching large numbers of MPI /
OpenSHMEM processes.
- Update OpenSHMEM API conformance to v1.3.
- The usnic BTL now supports MPI_THREAD_MULTIPLE.
- General/overall performance improvements to MPI_THREAD_MULTIPLE.
- Add a summary message at the bottom of configure that tells you many
of the configuration options specified and/or discovered by Open
MPI.
Changes in behavior compared to prior versions:
- None.
Removed legacy support:
- The ptmalloc2 hooks have been removed from the Open MPI code base.
This is not really a user-noticable change; it is only mentioned
here because there was much rejoycing in the Open MPI developer
community.
Bug fixes/minor improvements:
- New MCA parameters:
- iof_base_redirect_app_stderr_to_stdout: as its name implies, it
combines MPI / OpenSHMEM applications' stderr into its stdout
stream.
- opal_event_include: allow the user to specify which FD selection
mechanism is used by the underlying event engine.
- opal_stacktrace_output: indicate where stacktraces should be sent
upon MPI / OpenSHMEM process crashes ("none", "stdout", "stderr",
"file:filename").
- orte_timeout_for_stack_trace: number of seconds to wait for stack
traces to be reported (or <=0 to wait forever).
- mtl_ofi_control_prog_type/mtl_ofi_data_prog_type: specify libfabric
progress model to be used for control and data.
- Fix MPI_WTICK regression where the time reported may be inaccurate
on systems with processor frequency scalaing enabled.
- Fix regression that lowered the memory maximum message bandwidth for
large messages on some BTL network transports, such as openib, sm,
and vader.
- Fix a name collision in the shared file pointer MPI IO file locking
scheme. Thanks to Nicolas Joly for reporting the issue.
- Fix datatype extent/offset errors in MPI_PUT and MPI_RACCUMULATE
when using the Portals 4 one-sided component.
- Add support for non-contiguous datatypes to the Portals 4 one-sided
component.
- Various updates for the UCX PML.
- Updates to the following man pages:
- mpirun(1)
- MPI_COMM_CONNECT(3)
- MPI_WIN_GET_NAME(3). Thanks to Nicolas Joly for reporting the
typo.
- MPI_INFO_GET_[NKEYS|NTHKEY](3). Thanks to Nicolas Joly for
reporting the typo.
- Fixed a problem in the TCP BTL when using MPI_THREAD_MULTIPLE.
Thanks to Evgueni Petrov for reporting.
- Fixed external32 representation in the romio314 module. Note that
for now, external32 representation is not correctly supported by the
ompio module. Thanks to Thomas Gastine for bringing this to our
attention.
- Add note how to disable a warning message about when a high-speed
MPI transport is not found. Thanks to Susan Schwarz for reporting
the issue.
- Ensure that sending SIGINT when using the rsh/ssh launcher does not
orphan children nodes in the launch tree.
- Fix the help message when showing deprecated MCA param names to show
the correct (i.e., deprecated) name.
- Enable support for the openib BTL to use multiple different
InfiniBand subnets.
- Fix a minor error in MPI_AINT_DIFF.
- Fix bugs with MPI_IN_PLACE handling in:
- MPI_ALLGATHER[V]
- MPI_[I][GATHER|SCATTER][V]
- MPI_IREDUCE[_SCATTER]
- Thanks to all the users who helped diagnose these issues.
- Allow qrsh to tree spawn (if the back-end system supports it).
- Fix MPI_T_PVAR_GET_INDEX to return the correct index.
- Correctly position the shared file pointer in append mode in the
OMPIO component.
- Add some deprecated names into shmem.h for backwards compatibility
with legacy codes.
- Fix MPI_MODE_NOCHECK support.
- Fix a regression in PowerPC atomics support. Thanks to Orion
Poplawski for reporting the issue.
- Fixes for assembly code with aggressively-optimized compilers on
x86_64/AMD64 platforms.
- Fix one more place where configure was mangling custom CFLAGS.
Thanks to Phil Tooley (@Telemin) for reporting the issue.
- Better handle builds with external installations of hwloc.
- Fixed a hang with MPI_PUT and MPI_WIN_LOCK_ALL.
- Fixed a bug when using MPI_GET on non-contiguous datatypes and
MPI_LOCK/MPI_UNLOCK.
- Fixed a bug when using POST/START/COMPLETE/WAIT after a fence.
- Fix configure portability by cleaning up a few uses of "==" with
"test". Thanks to Kevin Buckley for pointing out the issue.
- Fix bug when using darrays with lib and extent of darray datatypes.
- Updates to make Open MPI binary builds more bit-for-bit
reproducable. Thanks to Alastair McKinstry for the suggestion.
- Fix issues regarding persistent request handling.
- Ensure that shmemx.h is a standalone OpenSHMEM header file. Thanks
to Nick Park (@nspark) for the report.
- Ensure that we always send SIGTERM prior to SIGKILL. Thanks to Noel
Rycroft for the report.
- Added ConnectX-5 and Chelsio T6 device defaults for the openib BTL.
- OpenSHMEM no longer supports MXM less than v2.0.
- Plug a memory leak in ompi_osc_sm_free. Thanks to Joseph Schuchart
for the report.
- The "self" BTL now uses less memory.
- The vader BTL is now more efficient in terms of memory usage when
using XPMEM.
- Removed the --enable-openib-failover configure option. This is not
considered backwards-incompatible because this option was stale and
had long-since stopped working, anyway.
- Allow jobs launched under Cray aprun to use hyperthreads if
opal_hwloc_base_hwthreads_as_cpus MCA parameter is set.
- Add support for 32-bit and floating point Cray Aries atomic
operations.
- Add support for network AMOs for MPI_ACCUMULATE, MPI_FETCH_AND_OP,
and MPI_COMPARE_AND_SWAP if the "ompi_single_intrinsic" info key is
set on the window or the "acc_single_intrinsic" MCA param is set.
- Automatically disqualify RDMA CM support in the openib BTL if
MPI_THREAD_MULTIPLE is used.
- Make configure smarter/better about auto-detecting Linux CMA
support.
- Improve the scalability of MPI_COMM_SPLIT_TYPE.
- Fix the mixing of C99 and C++ header files with the MPI C++
bindings. Thanks to Alastair McKinstry for the bug report.
- Add support for ARM v8.
- Several MCA parameters now directly support MPI_T enumerator
semantics (i.e., they accept a limited set of values -- e.g., MCA
parameters that accept boolean values).
- Added --with-libmpi-name=STRING configure option for vendor releases
of Open MPI. See the README for more detail.
- Fix a problem with Open MPI's internal memory checker. Thanks to Yvan
Fournier for reporting.
- Fix a multi-threaded issue with MPI_WAIT. Thanks to Pascal Deveze for
reporting.
Known issues (to be addressed in v2.1.1):
- See the list of fixes slated for v2.1.1 here:
https://github.com/open-mpi/ompi/milestone/26
2.0.4 -- November, 2017
-----------------------
Bug fixes/minor improvements:
- Fix an issue with visibility of functions defined in the built-in PMIx.
Thanks to Siegmar Gross for reporting this issue.
- Add configure check to prevent trying to build this release of
Open MPI with an external hwloc 2.0 or newer release.
- Add ability to specify layered providers for OFI MTL.
- Fix a correctness issue with Open MPI's memory manager code
that could result in corrupted message data. Thanks to
Valentin Petrov for reporting.
- Fix issues encountered when using newer versions of PBS Pro.
Thanks to Petr Hanousek for reporting.
- Fix a problem with MPI_GET when using the vader BTL. Thanks
to Dahai Guo for reporting.
- Fix a problem when using MPI_ANY_SOURCE with MPI_SENDRECV_REPLACE.
Thanks to Dahai Guo for reporting.
- Fix a problem using MPI_FILE_OPEN with a communicator with an
attached cartesian topology. Thanks to Wei-keng Liao for reporting.
- Remove IB XRC support from the OpenIB BTL due to lack of support.
- Remove support for big endian PowerPC.
- Remove support for XL compilers older than v13.1
2.0.3 -- June 2017
------------------
Bug fixes/minor improvements:
- Fix a problem with MPI_IALLTOALLW when zero size messages are present.
Thanks to @mathbird for reporting.
- Add missing MPI_USER_FUNCTION definition to the mpi_f08 module.
Thanks to Nathan Weeks for reporting this issue.
- Fix a problem with MPI_WIN_LOCK not returning an error code when
a negative rank is supplied. Thanks to Jeff Hammond for reporting and
providing a fix.
- Fix a problem with make check that could lead to hangs. Thanks to
Nicolas Morey-Chaisemartin for reporting.
- Resolve a symbol conflict problem with PMI-1 and PMI-2 PMIx components.
Thanks to Kilian Cavalotti for reporting this issue.
- Insure that memory allocations returned from MPI_WIN_ALLOCATE_SHARED are
64 byte aligned. Thanks to Joseph Schuchart for reporting this issue.
- Make use of DOUBLE_COMPLEX, if available, for Fortran bindings. Thanks
to Alexander Klein for reporting this issue.
- Add missing MPI_T_PVAR_SESSION_NULL definition to Open MPI mpi.h include
file. Thanks to Omri Mor for reporting and fixing.
- Fix a problem with use of MPI shared file pointers when accessing
a file from independent jobs. Thanks to Nicolas Joly for reporting
this issue.
- Optimize zero size MPI_IALLTOALL{V,W} with MPI_IN_PLACE. Thanks to
Lisandro Dalcin for the report.
- Fix a ROMIO buffer overflow problem for large transfers when using NFS
filesystems.
- Fix type of MPI_ARGV[S]_NULL which prevented it from being used
properly with MPI_COMM_SPAWN[_MULTIPLE] in the mpi_f08 module.
- Ensure to add proper linker flags to the wrapper compilers for
dynamic libraries on platforms that need it (e.g., RHEL 7.3 and
later).
- Get better performance on TCP-based networks 10Gbps and higher by
using OS defaults for buffer sizing.
- Fix a bug with MPI_[R][GET_]ACCUMULATE when using DARRAY datatypes.
- Fix handling of --with-lustre configure command line argument.
Thanks to Prentice Bisbal and Tim Mattox for reporting the issue.
- Added MPI_AINT_ADD and MPI_AINT_DIFF declarations to mpif.h. Thanks
to Aboorva Devarajan (@AboorvaDevarajan) for the bug report.
- Fix a problem in the TCP BTL when Open MPI is initialized with
MPI_THREAD_MULTIPLE support. Thanks to Evgueni Petro for analyzing and
reporting this issue.
- Fix yalla PML to properly handle underflow errors, and fixed a
memory leak with blocking non-contiguous sends.
- Restored ability to run autogen.pl on official distribution tarballs
(although this is still not recommended for most users!).
- Fix accuracy problems with MPI_WTIME on some systems by always using
either clock_gettime(3) or gettimeofday(3).
- Fix a problem where MPI_WTICK was not returning a higher time resolution
when available. Thanks to Mark Dixon for reporting this issue.
- Restore SGE functionality. Thanks to Kevin Buckley for the initial
report.
- Fix external hwloc compilation issues, and extend support to allow
using external hwloc installations as far back as v1.5.0. Thanks to
Orion Poplawski for raising the issue.
- Added latest Mellanox Connect-X and Chelsio T-6 adapter part IDs to
the openib list of default values.
- Do a better job of cleaning up session directories (e.g., in /tmp).
- Update a help message to indicate how to suppress a warning about
no high performance networks being detected by Open MPI. Thanks to
Susan Schwarz for reporting this issue.
- Fix a problem with mangling of custom CFLAGS when configuring Open MPI.
Thanks to Phil Tooley for reporting.
- Fix some minor memory leaks and remove some unused variables.
Thanks to Joshua Gerrard for reporting.
- Fix MPI_ALLGATHERV bug with MPI_IN_PLACE.
Known issues (to be addressed in v2.0.4):
- See the list of fixes slated for v2.0.4 here:
https://github.com/open-mpi/ompi/milestone/29
2.0.2 -- 26 January 2017
-------------------------
Bug fixes/minor improvements:
- Fix a problem with MPI_FILE_WRITE_SHARED when using MPI_MODE_APPEND and
Open MPI's native MPI-IO implementation. Thanks to Nicolas Joly for
reporting.
- Fix a typo in the MPI_WIN_GET_NAME man page. Thanks to Nicolas Joly
for reporting.
- Fix a race condition with ORTE's session directory setup. Thanks to
@tbj900 for reporting this issue.
- Fix a deadlock issue arising from Open MPI's approach to catching calls to
munmap. Thanks to Paul Hargrove for reporting and helping to analyze this
problem.
- Fix a problem with PPC atomics which caused make check to fail unless builtin
atomics configure option was enabled. Thanks to Orion Poplawski for reporting.
- Fix a problem with use of x86_64 cpuid instruction which led to segmentation
faults when Open MPI was configured with -O3 optimization. Thanks to Mark
Santcroos for reporting this problem.
- Fix a problem when using built in atomics configure options on PPC platforms
when building 32 bit applications. Thanks to Paul Hargrove for reporting.
- Fix a problem with building Open MPI against an external hwloc installation.
Thanks to Orion Poplawski for reporting this issue.
- Remove use of DATE in the message queue version string reported to debuggers to
insure bit-wise reproducibility of binaries. Thanks to Alastair McKinstry
for help in fixing this problem.
- Fix a problem with early exit of a MPI process without calling MPI_FINALIZE
or MPI_ABORT that could lead to job hangs. Thanks to Christof Koehler for
reporting.
- Fix a problem with forwarding of SIGTERM signal from mpirun to MPI processes
in a job. Thanks to Noel Rycroft for reporting this problem
- Plug some memory leaks in MPI_WIN_FREE discovered using Valgrind. Thanks
to Joseph Schuchart for reporting.
- Fix a problems MPI_NEIGHOR_ALLTOALL when using a communicator with an empty topology
graph. Thanks to Daniel Ibanez for reporting.
- Fix a typo in a PMIx component help file. Thanks to @njoly for reporting this.
- Fix a problem with Valgrind false positives when using Open MPI's internal memchecker.
Thanks to Yvan Fournier for reporting.
- Fix a problem with MPI_FILE_DELETE returning MPI_SUCCESS when
deleting a non-existent file. Thanks to Wei-keng Liao for reporting.
- Fix a problem with MPI_IMPROBE that could lead to hangs in subsequent MPI
point to point or collective calls. Thanks to Chris Pattison for reporting.
- Fix a problem when configure Open MPI for powerpc with --enable-mpi-cxx
enabled. Thanks to Alastair McKinstry for reporting.
- Fix a problem using MPI_IALLTOALL with MPI_IN_PLACE argument. Thanks to
Chris Ward for reporting.
- Fix a problem using MPI_RACCUMULATE with the Portals4 transport. Thanks to
@PDeveze for reporting.
- Fix an issue with static linking and duplicate symbols arising from PMIx
Slurm components. Thanks to Limin Gu for reporting.
- Fix a problem when using MPI dynamic memory windows. Thanks to
Christoph Niethammer for reporting.
- Fix a problem with Open MPI's pkgconfig files. Thanks to Alastair McKinstry
for reporting.
- Fix a problem with MPI_IREDUCE when the same buffer is supplied for the
send and recv buffer arguments. Thanks to Valentin Petrov for reporting.
- Fix a problem with atomic operations on PowerPC. Thanks to Paul
Hargrove for reporting.
Known issues (to be addressed in v2.0.3):
- See the list of fixes slated for v2.0.3 here:
https://github.com/open-mpi/ompi/milestone/23
2.0.1 -- 2 September 2016
-----------------------
Bug fixes/minor improvements:
- Short message latency and message rate performance improvements for
all transports.
- Fix shared memory performance when using RDMA-capable networks.
Thanks to Tetsuya Mishima and Christoph Niethammer for reporting.
- Fix bandwith performance degredation in the yalla (MXM) PML. Thanks
to Andreas Kempf for reporting the issue.
- Fix OpenSHMEM crash when running on non-Mellanox MXM-based networks.
Thanks to Debendra Das for reporting the issue.
- Fix a crash occuring after repeated calls to MPI_FILE_SET_VIEW with
predefined datatypes. Thanks to Eric Chamberland and Matthew
Knepley for reporting and helping chase down this issue.
- Fix stdin propagation to MPI processes. Thanks to Jingchao Zhang
for reporting the issue.
- Fix various runtime and portability issues by updating the PMIx
internal component to v1.1.5.
- Fix process startup failures on Intel MIC platforms due to very
large entries in /proc/mounts.
- Fix a problem with use of relative path for specifing executables to
mpirun/oshrun. Thanks to David Schneider for reporting.
- Various improvements when running over portals-based networks.
- Fix thread-based race conditions with GNI-based networks.
- Fix a problem with MPI_FILE_CLOSE and MPI_FILE_SET_SIZE. Thanks
to Cihan Altinay for reporting.
- Remove all use of rand(3) from within Open MPI so as not to perturb
applications use of it. Thanks to Matias Cabral and Noel Rycroft
for reporting.
- Fix crash in MPI_COMM_SPAWN.
- Fix types for MPI_UNWEIGHTED and MPI_WEIGHTS_EMPTY. Thanks to
Lisandro Dalcin for reporting.
- Correctly report the name of MPI_INTEGER16.
- Add some missing MPI constants to the Fortran bindings.
- Fixed compile error when configuring Open MPI with --enable-timing.
- Correctly set the shared library version of libompitrace.so. Thanks
to Alastair McKinstry for reporting.
- Fix errors in the MPI_RPUT, MPI_RGET, MPI_RACCUMULATE, and
MPI_RGET_ACCUMULATE Fortran bindings. Thanks to Alfio Lazzaro and
Joost VandeVondele for tracking this down.
- Fix problems with use of derived datatypes in non-blocking
collectives. Thanks to Yuki Matsumoto for reporting.
- Fix problems with OpenSHMEM header files when using CMake. Thanks to
Paul Kapinos for reporting the issue.
- Fix problem with use use of non-zero lower bound datatypes in
collectives. Thanks to Hristo Iliev for reporting.
- Fix a problem with memory allocation within MPI_GROUP_INTERSECTION.
Thanks to Lisandro Dalcin for reporting.
- Fix an issue with MPI_ALLGATHER for communicators that don't consist
of two ranks. Thanks to David Love for reporting.
- Various fixes for collectives when used with esoteric MPI datatypes.
- Fixed corner cases of handling DARRAY and HINDEXED_BLOCK datatypes.
- Fix a problem with filesystem type check for OpenBSD.
Thanks to Paul Hargrove for reporting.
- Fix some debug input within Open MPI internal functions. Thanks to
Durga Choudhury for reporting.
- Fix a typo in a configury help message. Thanks to Paul Hargrove for
reporting.
- Correctly support MPI_IN_PLACE in MPI_[I]ALLTOALL[V|W] and
MPI_[I]EXSCAN.
- Fix alignment issues on SPARC platforms.
Known issues (to be addressed in v2.0.2):
- See the list of fixes slated for v2.0.2 here:
https://github.com/open-mpi/ompi/milestone/20, and
https://github.com/open-mpi/ompi-release/milestone/19
(note that the "ompi-release" Github repo will be folded/absorbed
into the "ompi" Github repo at some point in the future)
2.0.0 -- 12 July 2016
---------------------
**********************************************************************
* Open MPI is now fully MPI-3.1 compliant
**********************************************************************
Major new features:
- Many enhancements to MPI RMA. Open MPI now maps MPI RMA operations
on to native RMA operations for those networks which support this
capability.
- Greatly improved support for MPI_THREAD_MULTIPLE (when configured
with --enable-mpi-thread-multiple).
- Enhancements to reduce the memory footprint for jobs at scale. A
new MCA parameter, "mpi_add_procs_cutoff", is available to set the
threshold for using this feature.
- Completely revamped support for memory registration hooks when using
OS-bypass network transports.
- Significant OMPIO performance improvements and many bug fixes.
- Add support for PMIx - Process Management Interface for Exascale.
Version 1.1.2 of PMIx is included internally in this release.
- Add support for PLFS file systems in Open MPI I/O.
- Add support for UCX transport.
- Simplify build process for Cray XC systems. Add support for
using native SLURM.
- Add a --tune mpirun command line option to simplify setting many
environment variables and MCA parameters.
- Add a new MCA parameter "orte_default_dash_host" to offer an analogue
to the existing "orte_default_hostfile" MCA parameter.
- Add the ability to specify the number of desired slots in the mpirun
--host option.
Changes in behavior compared to prior versions:
- In environments where mpirun cannot automatically determine the
number of slots available (e.g., when using a hostfile that does not
specify "slots", or when using --host without specifying a ":N"
suffix to hostnames), mpirun now requires the use of "-np N" to
specify how many MPI processes to launch.
- The MPI C++ bindings -- which were removed from the MPI standard in
v3.0 -- are no longer built by default and will be removed in some
future version of Open MPI. Use the --enable-mpi-cxx-bindings
configure option to build the deprecated/removed MPI C++ bindings.
- ompi_info now shows all components, even if they do not have MCA
parameters. The prettyprint output now separates groups with a
dashed line.
- OMPIO is now the default implementation of parallel I/O, with the
exception for Lustre parallel filesystems (where ROMIO is still the
default). The default selection of OMPI vs. ROMIO can be controlled
via the "--mca io ompi|romio" command line switch to mpirun.
- Per Open MPI's versioning scheme (see the README), increasing the
major version number to 2 indicates that this version is not
ABI-compatible with prior versions of Open MPI. You will need to
recompile MPI and OpenSHMEM applications to work with this version
of Open MPI.
- Removed checkpoint/restart code due to loss of maintainer. :-(
- Change the behavior for handling certain signals when using PSM and
PSM2 libraries. Previously, the PSM and PSM2 libraries would trap
certain signals in order to generate tracebacks. The mechanism was
found to cause issues with Open MPI's own error reporting mechanism.
If not already set, Open MPI now sets the IPATH_NO_BACKTRACE and
HFI_NO_BACKTRACE environment variables to disable PSM/PSM2's
handling these signals.
Removed legacy support:
- Removed support for OS X Leopard.
- Removed support for Cray XT systems.
- Removed VampirTrace.
- Removed support for Myrinet/MX.
- Removed legacy collective module:ML.
- Removed support for Alpha processors.
- Removed --enable-mpi-profiling configure option.
Known issues (to be addressed in v2.0.1):
- See the list of fixes slated for v2.0.1 here:
https://github.com/open-mpi/ompi/milestone/16, and
https://github.com/open-mpi/ompi-release/milestone/16
(note that the "ompi-release" Github repo will be folded/absorbed
into the "ompi" Github repo at some point in the future)
- ompi-release#986: Fix data size counter for large ops with fcoll/static
- ompi-release#987: Fix OMPIO performance on Lustre
- ompi-release#1013: Fix potential inconsistency in btl/openib default settings
- ompi-release#1014: Do not return MPI_ERR_PENDING from collectives
- ompi-release#1056: Remove dead profile code from oshmem
- ompi-release#1081: Fix MPI_IN_PLACE checking for IALLTOALL{V|W}
- ompi-release#1081: Fix memchecker in MPI_IALLTOALLW
- ompi-release#1081: Support MPI_IN_PLACE in MPI_(I)ALLTOALLW and MPI_(I)EXSCAN
- ompi-release#1107: Allow future PMIx support for RM spawn limits
- ompi-release#1108: Fix sparse group process reference counting
- ompi-release#1109: If specified to be oversubcribed, disable binding
- ompi-release#1122: Allow NULL arrays for empty datatypes
- ompi-release#1123: Fix signed vs. unsigned compiler warnings
- ompi-release#1123: Make max hostname length uniform across code base
- ompi-release#1127: Fix MPI_Compare_and_swap
- ompi-release#1127: Fix MPI_Win_lock when used with MPI_Win_fence
- ompi-release#1132: Fix typo in help message for --enable-mca-no-build
- ompi-release#1154: Ensure pairwise coll algorithms disqualify themselves properly
- ompi-release#1165: Fix typos in debugging/verbose message output
- ompi-release#1178: Fix ROMIO filesystem check on OpenBSD 5.7
- ompi-release#1197: Fix Fortran pthread configure check
- ompi-release#1205: Allow using external PMIx 1.1.4 and 2.0
- ompi-release#1215: Fix configure to support the NAG Fortran compiler
- ompi-release#1220: Fix combiner args for MPI_HINDEXED_BLOCK
- ompi-release#1225: Fix combiner args for MPI_DARRAY
- ompi-release#1226: Disable old memory hooks with recent gcc versions
- ompi-release#1231: Fix new "patcher" support for some XLC platforms
- ompi-release#1244: Fix Java error handling
- ompi-release#1250: Ensure TCP is not selected for RDMA operations
- ompi-release#1252: Fix verbose output in coll selection
- ompi-release#1253: Set a default name for user-defined MPI_Op
- ompi-release#1254: Add count==0 checks in some non-blocking colls
- ompi-release#1258: Fix "make distclean" when using external pmix/hwloc/libevent
- ompi-release#1260: Clean up/uniform mca/coll/base memory management
- ompi-release#1261: Remove "patcher" warning message for static builds
- ompi-release#1263: Fix IO MPI_Request for 0-size read/write
- ompi-release#1264: Add blocking fence for SLURM operations
Bug fixes / minor enhancements:
- Updated internal/embedded copies of third-party software:
- Update the internal copy of ROMIO to that which shipped in MPICH
3.1.4.
- Update internal copy of libevent to v2.0.22.
- Update internal copy of hwloc to v1.11.2.
- Notable new MCA parameters:
- opal_progress_lp_call_ration: Control how often low-priority
callbacks are made during Open MPI's main progress loop.
- opal_common_verbs_want_fork_support: This replaces the
btl_openib_want_fork_support parameter.
- Add --with-platform-patches-dir configure option.
- Add --with-pmi-libdir configure option for environments that install