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This is bringing back the news from 66ecc05, which was removed with the readthedocs change. Signed-off-by: Austen Lauria <awlauria@us.ibm.com>
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| Open MPI v5.0.x series | ||
| ============================================ | ||
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| This file contains all the NEWS updates for the Open MPI v5.0.x | ||
| series, in reverse chronological order. | ||
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| Open MPI version 5.0.0rc3 | ||
| ------------------------- | ||
| :Date: 8 March 2022 | ||
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| .. admonition:: MPIR API has been removed | ||
| :class: warning | ||
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| As was announced in summer 2017, Open MPI has removed support of | ||
| MPIR-based tools beginning with the release of Open MPI v5.0.0. | ||
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| The new PRRTE based runtime environment supports PMIx-tools API | ||
| instead of the legacy MPIR API for debugging parallel jobs. | ||
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| see https://github.com/openpmix/mpir-to-pmix-guide for more | ||
| information | ||
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| .. admonition:: zlib is suggested for better user experience | ||
| :class: note | ||
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| PMIx will optionally use zlib to compress large data streams. | ||
| 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. | ||
| - New MPI-4.0 features: | ||
| - Added ERRORS_ABORT infrastructure. | ||
| - Added support for 'initial error handler'. | ||
| - Added error handling for 'unbound' errors to MPI_COMM_SELF. | ||
| - Persistent collectives have been moved to the MPI | ||
| namespace from MPIX. | ||
| - Make MPI_Comm_get_info, MPI_File_get_info, and | ||
| MPI_Win_get_info compliant to the standard. | ||
| - Initial partitioned communication using persistent sends and | ||
| persistent receives added. | ||
| - Added support for MPI_Info_get_string. | ||
| - Droped unknown/ignored info keys on communicators, files, | ||
| and windows. | ||
| - Implemented MPI_Isendrecv() and its variants. | ||
| - Added Support for MPI_Comm_idup_with_info(). | ||
| - 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. | ||
| - Updated to use PMIx v4.2 branch - current hash: b59e49f | ||
| - Updated to use PRRTE v2.1 branch - current hash: 8c09625 | ||
| - osc/rdma and various btls: Many fixes to better support btl/tcp. | ||
| - This patch series fixs many issues when running with | ||
| "--mca osc rdma --mca btl tcp", IE - TCP support for one sided MPI calls. | ||
| - 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). | ||
| - HWLOC: Require v1.11.0 or later. | ||
| - HWLOC: Updated internal hwloc to v2.7.0. | ||
| - HWLOC: enable --enable-plugins when appropriate | ||
| When running configure on the internal hwloc, enable plugins via | ||
| the --enable-plugins option when 1) --disable-dlopen was not | ||
| specified and 2) the user didn't add some variant of | ||
| --enable-plugins on the configure line already. The motivation | ||
| for this change is to not pull in hwloc dependencies like libcuda | ||
| in the general case. | ||
| - 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 <sdidelot@ddn.com> 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 <zhany217@wfu.edu>, | ||
| Samuel Cho <choss@wfu.edu>, | ||
| rlangefe <langrc18@wfu.edu>, | ||
| Alex Ross <rossaj16@wfu.edu>, | ||
| Sophia Fang <fangq18@wfu.edu>, | ||
| mitchelltopaloglu <mitchelltopaloglu@gmail.com>, | ||
| Evstrife <wus217@wfu.edu>, and | ||
| Hao Tong <tongh18@gemini.deac.wfu.edu> 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. | ||
| - common/cuda docs: Various fixes. Thanks to | ||
| Simon Byrne <simonbyrne@gmail.com> 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 <john.mciver.iii@gmail.com> 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. | ||
| - opal/thread/tsd: Added thread-specific-data (tsd) api. | ||
| - 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 <a.naribayashi@fujitsu.com> 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 <fyin2@nd.edu> for their contribution | ||
| to this effort. | ||
| - Fixed ompi_proc_world error string and some comments in pml/ob1. | ||
| Thanks to Julien EMMANUEL <julien.emmanuel@inria.fr> for | ||
| finding and fixing these issues. | ||
| - oshmem/tools/oshmem_info: Fixed Fortran keyword issue when | ||
| compiling param.c. Thanks to Pak Lui <pak.lui@amd.com> 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 <zosman@gmu.edu> 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 <marisa.roman@cornelisnetworks.com> | ||
| for the contribution. | ||
| - fcoll/two_phase: Removed the component. All scenerios it was | ||
| used for has been replaced. | ||
| - btl/uct: Bumped highest supported UCX version to v1.10.x. | ||
| - ULFM Fault Tolerance has been added. See README.FT.ULFM.md. | ||
| - Fixed a crash during CUDA initialization. | ||
| Thanks to Yaz Saito <yasushi.saito@gmail.com> 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 <jeff_hammond@acm.org> 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 wilton.loch@gmail.com>, | ||
| and Guilherme Koslovski for their contribution. | ||
| - OFI: Delay patcher initialization until needed. It will now | ||
| be initialized only after the component is officially selected. | ||
| - 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 | ||
| <Felix.Uhl@emea.nec.com> 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 <rlwelch@amazon.com> 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. | ||
| - Added OpenPMIx binaries to build, including pmix_info. | ||
| - Added new OSHMEM APIs for v1.5. | ||
| Thanks to Mamzi Bayatpour <mbayatpour@nvidia.com> for the contribution. | ||
| - OSC/UCX - Various fixes for dynamic windows. | ||
| - allocator/bucket: Add check for overflow. | ||
| - Fortran: Fixes for grequest return values and status. | ||
| - mtl/ofi: Call fi_setopt to state MPI p2p requirements for CUDA | ||
| - Fortran: Changed MPI_Waitall/array_of_requests/etc bindings from dimension(count) to dimension(*). | ||
| - coll/base/alltoall: Fixed send/recv offsets in rbuf for the case of MPI_IN_PLACE | ||
| - btl/uct: Updated the defaults to allow Mellanox HCAs (mlx4_0, and mlx5_0) for | ||
| osc/rdma to work out-of-the-box. | ||
| - build: Fix bug where internal PMIx/PRRTE configure was running | ||
| even if external requested. | ||
| - Fixed a segv when older HWLOCs are used. | ||
| - Various fixes for static builds. | ||
| - ofi/mtl: Fix component selection debug output | ||
| Thanks fo Samuel K. Gutierrez <samuel@lanl.gov> for the contribution. | ||
| - opal/mca/threads/pthreads: removed opal_pthread_mutex_t - cleans | ||
| up logic and code duplication. | ||
| Thanks to Shintaro Iwasaki <siwasaki@anl.gov> for the contribution. | ||
| - opal/mca/threads/qhtreads: Added opal_recursive_mutex_t support. | ||
| Thanks to Jan Ciesko <jciesko@sandia.gov> for the contribution. | ||
| - Various improvements to MPI_Test, MPI_Testall, and MPI_Testsome. | ||
| - MPI module: added the mpi_f08 TYPE(MPI_*) types. | ||
| - MPI_Op: Various performance improvements, and removed all ops with three buffers. | ||
| Thanks to George Katevenis <gkatev@ics.forth.gr> for the report | ||
| and their contribution to the patch. | ||
| - Fixed Fortran preprocessor issue with CPPFLAGS. | ||
| Thanks to Jeff Hammond for reporting this issue. | ||
| - opal/atomics: Cleaned up and refactored these interfaces. | ||
| - btl/sm: Fixed crash on put/get to self. | ||
| - btl/base_am_rdma: fix handling of btl_send returning 1 | ||
| - Fixed bus error with btl/sm + XPMEM. | ||
| Thanks to George Katevenis for reporting this issue. | ||
| - scoll/ucc: fix long long reduction dtype. | ||
| Thanks to ferrol aderholdt <faderholdt@nvidia.com> for the | ||
| contribution. | ||
| - scoll/ucc: add onesided ucc support | ||
| Thanks to ferrol aderholdt <faderholdt@nvidia.com> for the | ||
| contribution. | ||
| - opal/common/ucx: enable OPAL memory hooks by default | ||
| This will provide compatibility to other transports. | ||
| - Fixed leak of sm_segment files in /dev/shm. | ||
| - ompi/contrib: Removed libompitrace. | ||
| This library was incomplete and unmaintained. If needed, it | ||
| is available in the v4/v4.1 series. |