v4.2.0rc1

tagging 'v4.2.0rc1'

v4.2.0b1

tagging 'v4.2.0b1'

v4.1.2

Changes in 4.1.2

• Update UCX module to includes fixes for building with GCC 13

• Update libfabric module to 1.18.0 with additional fixes for building
  with recent versions of LLVM/Clang

• Fix compiler wrapper scripts to be compatible with CUDA memory hooks

• Fix MPIX_WAITALL_ENQUEUE to make a copy of the input request array

• Fix bug in MPI_ALLREDUCE that could result in ranks receiving
  different floating point values

• Fix potential deadlock when progressing RMA windows

• Fix potential crash in MPI_REDUCE with non-zero root and MPI_IN_PLACE

• Fix potential crash during probe with libfabric CXI provider

• Fix MPI_PARRIVED when the partitioned request is inactive

• Fix potential bug when an attribute delete callback deletes another
  attribute on the same object

• Fix build issue in ROMIO Lustre driver

• Improve Fortran 2008 binding support detection during configure

• Report an error if collective tuning json file fails to open

• Several fixes for testsuite programs and build configuration

v4.1.1

Changes in 4.1.1

• Update embedded UCX module to 1.13.1. Fixes a build issue with
  binutils >= 2.39.

• Update yaksa module. Support explicit NVCC setting by the user. Fixes
  a build issue when there is no libtool available in PATH.

• Fix ch4:ucx initialization when configured with
  --enable-ch4-vci-method=implicit.

• Fix potential error handler leak during MPI_SESSION_FINALIZE

• Fix value of MPI_UNDEFINED in mpif.h binding

• Fix MPI_IALLTOALLW with MPI_IN_PLACE

• Fix send attribute handling in IPC path

• Fix a bug in persistent MPI_ALLGATHER

• Fix tests for use with non-MPICH libraries

• Add missing MPI_T_ERR_NOT_ACCESSIBLE error code

• Fix manpages for MPIX functions

v4.1

Changes in 4.1

• Thread-cs in ch4 changed to per-vci.

• Testsuite (test/mpi) is configured separately from mpich configure.

• Added options in autogen to accelerate CI builds, including using pre-built
  sub-modules. Added -yaksa-depth option to generate shallower yaksa pup code
  for faster build and smaller binaries.

• Support singleton init using hydra.

• On OSX, link option flat_namespace is no longer turned on by default.

• Generate mpi.mod Fortran interfaces using Python 3. For many compilers,
  including gfortran, flags such as -fallow-mismatched-args is no longer
  necessary.

• Fixed message queue debugger interface in ch4.

• PMI (src/pmi) is refactored as a subdir and can be separately distributed.

• Added MPIX_Comm_get_failed.

• Experimental MPIX stream API to enable explicit thread contexts.

• Experimental MPIX gpu enqueue API. It currently only supports CUDA streams.

• Delays GPU resource allocation in yaksa.

• CH3 nemesis ofi netmod is removed.

• New collective algorithms. All collective algorithms are listed in
  src/mpi/coll/coll_algorithms.txt

• Removed hydra2. We will port unique features of hydra2, including
  tree-launching, to hydra in the future release.

• Added in-repository wiki documentation.

• Added stream workq to support optimizations for enqueue operations.

• Better support for large count APIs by eliminating type conversion issues.

• Hydra now uses libpmi (src/pmi) for handling PMI messages.

• Many bug fixes and enhancements.

v4.0.3

Changes in 4.0.3

• Fix message queue dumping interface support

• Fix multinic usage in ch4:ofi

• Fix bug in MPI_WIN_CREATE in ch4:ucx when UCX >= 1.13.0

• Fix MPIR_pmi_barrier when PMI2 is used

• Fix ROMIO lazy mutex initialization

• Fix build with HIP support

• Fix potential dynamic process message mixups in ch3

• Add missing const to MPI_Pready_list array_of_partitions argument

• Add support for C++ datatypes even when the C++ binding is disabled

• Add support for Intel OneAPI compilers

v4.0.2

Changes in 4.0.2

• Fix CUDA configuration logic in yaksa

• Fix support for dynamic process functionality with PMI2 clients

• Fix non-zero appnum bug in PMI2 server in Hydra

• Fix MPI_Op support for types created with MPI_Type_create_f90_xxx

• Fix building ch4 with Intel compilers on macOS

• Fix Level Zero properties initialization in MPL. Thanks to Brice
  Videau for the report and patch.

• Use standard names for CPU affinity functions with POSIX
  threads. Fixes building against Musl libc. Thanks to Mosè Giordano for
  the report and patch.

• Add elemental to eq/neq operators in Fortran 2008 binding

• Workaround for inter-process mutex bug on FreeBSD

v4.0.1

Changes in 4.0.1

• Multiple fixes for NVIDIA/PGI HPC Compilers support

• Fix ch4:ofi:gni provider capability set

• Fix MPI_SESSION_INIT "thread_level" info hint

• Fix build on macOS with --disable-shared

• Fix QMPI function definitions

• Fix support for "host" info hint in MPI_COMM_SPAWN[_MULTIPLE]

• Fix manpage generation

• Add missing MPI_F_sync_reg function

• Add missing const to MPI_Psend_init buffer argument

• Make Python 3 optional in configure script

• Remove -Wl,flat_namespace from compile wrappers by default (macOS only)

• Update UCX module to v1.12.0

• Update yaksa module to support latest Ampere compute capability

v4.0

Changes in 4.0

• All MPI-4 APIs have been implemented. Major MPI-4 features include MPI
  sessions, partitioned point-to-point communications, events in the MPI tool
  information interface, large-count functions, persistent collectives,
  MPI_Comm_idup_with_info, MPI_Isendrecv and MPI_Isendrecv_replace,
  MPI_Info_get_string, MPI_Comm_split_type with new split_type --
  MPI_COMM_TYPE_HW_GUIDED and MPI_COMM_TYPE_HW_UNGUIDED.

• Add QMPI (experimental) support.

• Add MPIX_Delete_error_{class,code,string}.

• MPI_Info objects can be accessed before MPI_Init{_thread}.

• Generate C API interface functions including man page notes and error
  checking using Python scripts.

• Generate Fortran (mpif.h, mpi_f08) bindings using Python scripts.

• Generate collective entrance functions and generate per-algorithm tests.

• Support explicit --without-cuda configure option.

• Drop support for UCX version < 1.7.0.

• Configure now optionally require Python 3 (when F08 is enabled).

• Multi-NIC support in ch4:ofi.

• Default to ch4:ofi when configure doesn't have a clear choice. Add message
  block at the end of configure to advise user.

• Multiple VCI is fully implemented including the active message fallback paths.

• Extend IPC to support non-contig datatypes.

• Add AMD GPU support using HIP.

• Add generic RNDV callback mechanism with active messages.

• Refactor ch4 dynamic process functions.

• Avoid building MPL and hwloc multiple times.

• Fix MPIX_Query_cuda_support.

• Many bug fixes and code clean-ups.

v4.0rc3

tagging 'v4.0rc3'