Merge pull request #10084 from awlauria/news_v5.0.x_docs

Add the news for v5.0.x branch.

Author: gpaulsen

docs/news/index.rst

@@ -39,6 +39,7 @@ version 1.0.
    :maxdepth: 1
 
    news-main
+   news-v5.0.x
    news-v4.1.x
    news-v4.0.x
    news-v3.1.x

docs/news/news-main.rst

@@ -6,9 +6,9 @@ not yet appeared on a release branch.  It reflects active development,
 and is therefore a "loose" listing of features and changes.  It is not
 considered definitive.
 
-Open MPI version 5.0.0rc2
--------------------------
-:Date: 10 Oct 2021
+Open MPI version main
+---------------------
+:Date: 30 March 2022
 
 .. admonition:: MPIR API has been removed
    :class: warning
@@ -30,180 +30,3 @@ Open MPI version 5.0.0rc2
    This may result in shorter-than-normal startup times and
    smaller memory footprints.  It is recommended to install zlib
    and zlib-devel for a better user experience.
-
-- ORTE, the underlying OMPI launcher has been removed, and replaced
-  with PRTE.
-- Reworked how Open MPI integrates with 3rd party packages.
-  The decision was made to stop building 3rd-party packages
-  such as Libevent, HWLOC, PMIx, and PRRTE as MCA components
-  and instead 1) start relying on external libraries whenever
-  possible and 2) Open MPI builds the 3rd party libraries (if needed)
-  as independent libraries, rather than linked into libopen-pal.
-- Update to use PMIx v4.1.1rc2
-- Update to use PRRTE v2.0.1rc2
-- Change the default component build behavior to prefer building
-  components as part of libmpi.so instead of individual DSOs.
-- Remove pml/yalla, mxm, mtl/psm, and ikrit components.
-- Remove all vestiges of the C/R support.
-- Various ROMIO v3.4.1 updates.
-- Use Pandoc to generate manpages
-- 32 bit atomics are now only supported via C11 compliant compilers.
-- Explicitly disable support for GNU gcc < v4.8.1 (note: the default
-  gcc compiler that is included in RHEL 7 is v4.8.5).
-- Do not build Open SHMEM layer when there are no SPMLs available.
-  Currently, this means the Open SHMEM layer will only build if
-  the UCX library is found.
-- Fix rank-by algorithms to properly rank by object and span.
-- Updated the ``-mca pml`` option to only accept one pml, not a list.
-- vprotocol/pessimist: Updated to support ``MPI_THREAD_MULLTIPLE``.
-- btl/tcp: Updated to use reachability and graph solving for global
-  interface matching. This has been shown to improve ``MPI_Init()``
-  performance under btl/tcp.
-- fs/ime: Fixed compilation errors due to missing header inclusion
-  Thanks to Sylvain Didelot <[email protected]> for finding
-  and fixing this issue.
-- Fixed bug where MPI_Init_thread can give wrong error messages by
-  delaying error reporting until all infrastructure is running.
-- Atomics support removed: S390/s390x, Sparc v9, ARMv4 and ARMv5 CMA
-  support.
-- ``autogen.pl`` now supports a ``-j`` option to run multi-threaded.
-  Users can also use environment variable ``AUTOMAKE_JOBS``.
-- PMI support has been removed for Open MPI apps.
-- Legacy btl/sm has been removed, and replaced with btl/vader, which
-  was renamed to btl/sm.
-- Update btl/sm to not use CMA in user namespaces.
-- C++ bindings have been removed.
-- The ``--am`` and ``--amca`` options have been deprecated.
-- opal/mca/threads framework added. Currently supports
-  argobots, qthreads, and pthreads. See the --with-threads=x option
-  in configure.
-- Various ``README.md`` fixes - thanks to:
-  Yixin Zhang <[email protected]>,
-  Samuel Cho <[email protected]>,
-  Robert Langfield <[email protected]>,
-  Alex Ross <[email protected]>,
-  Sophia Fang <[email protected]>,
-  mitchelltopaloglu <[email protected]>,
-  Evstrife <[email protected]>, and
-  Hao Tong <[email protected]> for their
-  contributions.
-- osc/pt2pt: Removed. Users can use osc/rdma + btl/tcp
-  for OSC support using TCP, or other providers.
-- Open MPI now links -levent_core instead of -levent.
-- MPI-4: Added ``ERRORS_ABORT`` infrastructure.
-- common/cuda docs: Various fixes. Thanks to
-  Simon Byrne <[email protected]> for finding and fixing.
-- osc/ucx: Add support for acc_single_intrinsic.
-- Fixed ``buildrpm.sh -r`` option used for RPM options specification.
-  Thanks to John K. McIver III <[email protected]> for
-  reporting and fixing.
-- configure: Added support for setting the wrapper C compiler.
-  Adds new option ``--with-wrapper-cc=``.
-- mpi_f08: Fixed Fortran-8-byte-INTEGER vs. C-4-byte-int issue.
-  Thanks to @ahaichen for reporting the bug.
-- MPI-4: Added support for 'initial error handler'.
-- opal/thread/tsd: Added thread-specific-data (tsd) api.
-- MPI-4: Added error handling for 'unbound' errors to ``MPI_COMM_SELF``.
-- Add missing ``MPI_Status`` conversion subroutines:
-  ``MPI_Status_c2f08()``, ``MPI_Status_f082c()``, ``MPI_Status_f082f()``,
-  ``MPI_Status_f2f08()`` and the ``PMPI_*`` related subroutines.
-- patcher: Removed the Linux component.
-- opal/util: Fixed typo in error string. Thanks to
-  NARIBAYASHI Akira <[email protected]> for finding
-  and fixing the bug.
-- fortran/use-mpi-f08: Generate PMPI bindings from the MPI bindings.
-- Converted man pages to markdown.
-  Thanks to Fangcong Yin <[email protected]> for their contribution
-  to this effort.
-- Fixed ompi_proc_world error string and some comments in pml/ob1.
-  Thanks to Julien EMMANUEL <[email protected]> for
-  finding and fixing these issues.
-- oshmem/tools/oshmem_info: Fixed Fortran keyword issue when
-  compiling param.c. Thanks to Pak Lui <[email protected]> for
-  finding and fixing the bug.
-- autogen.pl: Patched libtool.m4 for OSX Big Sur. Thanks to
-  @fxcoudert for reporting the issue.
-- Updgraded to HWLOC v2.4.0.
-- Removed config/opal_check_pmi.m4.
-  Thanks to Zach Osman <[email protected]> for the contribution.
-- opal/atomics: Added load-linked, store-conditional atomics for
-  AArch6.
-- Fixed envvar names to OMPI_MCA_orte_precondition_transports.
-  Thanks to Marisa Roman <[email protected]>
-  for the contribution.
-- fcoll/two_phase: Removed the component. All scenerios it was
-  used for has been replaced.
-- btl/uct: Bumped UCX allowed version to v1.9.x.
-- ULFM Fault Tolerance has been added. See ``README.FT.ULFM.md``.
-- Fixed a crash during CUDA initialization.
-  Thanks to Yaz Saito <[email protected]> for finding
-  and fixing the bug.
-- Added CUDA support to the OFI MTL.
-- ompio: Added atomicity support.
-- Singleton comm spawn support has been fixed.
-- Autoconf v2.7 support has been updated.
-- fortran: Added check for ``ISO_FORTRAN_ENV:REAL16``. Thanks to
-  Jeff Hammond <[email protected]> for reporting this issue.
-- Changed the MCA component build style default to static.
-- PowerPC atomics: Force usage of opal/ppc assembly.
-- Removed C++ compiler requirement to build Open MPI.
-- Fixed .la files leaking into wrapper compilers.
-- Fixed bug where the cache line size was not set soon enough in
-  ``MPI_Init()``.
-- coll/ucc and scoll/ucc components were added.
-- coll/ucc: Added support for allgather and reduce collective
-  operations.
-- autogen.pl: Fixed bug where it would not ignore all
-  excluded components.
-- Various datatype bugfixes and performance improvements
-- Various pack/unpack bugfixes and performance improvements
-- Fix mmap infinite recurse in memory patcher
-- Fix C to Fortran error code conversions.
-- osc/ucx: Fix data corruption with non-contiguous accumulates
-- Update coll/tuned selection rules
-- Fix non-blocking collective ops
-- btl/portals4: Fix flow control
-- Various oshmem:ucx bugfixes and performance improvements
-- common/ofi: Disable new monitor API until libfabric 1.14.0
-- Fix AVX detection with icc
-- mpirun option ``--mca ompi_display_comm mpi_init``/``mpi_finalize``
-  has been added. Enables a communication protocol report:
-  when ``MPI_Init`` is invoked (using the ``mpi_init`` value) and/or
-  when ``MPI_Finalize`` is invoked (using the ``mpi_finalize`` value).
-- New algorithm for Allgather and Allgatherv added, based on the
-  paper *"Sparbit: a new logarithmic-cost and data locality-aware MPI
-  Allgather algorithm"*. Default algorithm selection rules are
-  un-changed, to use these algorithms add:
-  ``--mca coll_tuned_allgather_algorithm sparbit`` and/or
-  ``--mca coll_tuned_allgatherv_algorithm sparbit``
-  Thanks to: Wilton Jaciel Loch <wiltonloch [email protected]>,
-  and Guilherme Koslovski for their contribution.
-- MPI-4: Persistent collectives have been moved to the MPI
-  namespace from MPIX.
-- OFI: Delay patcher initialization until needed. It will now
-  be initialized only after the component is officially selected.
-- MPI-4: Make ``MPI_Comm_get_info``, ``MPI_File_get_info``, and
-  ``MPI_Win_get_info`` compliant to the standard.
-- Portable_platform file has been updated from GASNet.
-- GCC versions < 4.8.1 are no longer supported.
-- coll: Fix a bug with the libnbc ``MPI_AllReduce`` ring algorithm
-  when using ``MPI_IN_PLACE``.
-- Updated the usage of .gitmodules to use relative paths from
-  absolute paths. This allows the submodule cloning to use the same
-  protocol as OMPI cloning. Thanks to Felix Uhl
-  <[email protected]> for the contribution.
-- osc/rdma: Add local leader pid in shm file name to make it unique.
-- ofi: Fix memory handler unregistration. This change fixes a
-  segfault during shutdown if the common/ofi component was built
-  as a dynamic object.
-- osc/rdma: Add support for MPI minimum alignment key.
-- memory_patcher: Add ability to detect patched memory. Thanks
-  to Rich Welch <[email protected]> for the contribution.
-- build: Improve handling of compiler version string. This
-  fixes a compiler error with clang and armclang.
-- Fix bug where the relocation of OMPI packages caused
-  the launch to fail.
-- Various improvements to ``MPI_AlltoAll`` algorithms for both
-  performance and memory usage.
-- coll/basic: Fix segmentation fault in ``MPI_Alltoallw`` with
-  ``MPI_IN_PLACE``.