27 Pull requests merged by 11 people

• memchecker: fix some problems with arg checking

  #13174 merged Apr 1, 2025

• HAN: plug some memory leaks found by valgrind

  #13172 merged Apr 1, 2025

• Remove components for old operating systems

  #13163 merged Mar 31, 2025

• v5.0.x: configury: fix support for flang on OSX

  #13162 merged Mar 31, 2025

• Generate bigcount interfaces for Fortran and C

  #12226 merged Mar 28, 2025

• Revert "fortran:fix integer kind=8 problem"

  #13165 merged Mar 25, 2025

• A series of minor updates / cleanups

  #13146 merged Mar 25, 2025

• Encode help-*.txt file contents into C source code

  #13144 merged Mar 25, 2025

• fortran:fix integer kind=8 problem

  #13159 merged Mar 24, 2025

• configury: fix support for flang on OSX

  #13142 merged Mar 23, 2025

• external data pack: switch to using size_t

  #13158 merged Mar 19, 2025

• hdf5-tests: abbreviate the wget output

  #13150 merged Mar 17, 2025

• fix up use of opal_enable_debug

  #13139 merged Mar 17, 2025

• Update PMIx/PRRTE submodule pointers

  #13141 merged Mar 14, 2025

• v5.0.x: Latest Fedora has dropped the arch suffix from the openjdk directory

  #13121 merged Mar 12, 2025

• Add a link to the gcc discussion about patcher.

  #13083 merged Mar 11, 2025

• docs: minor additions to the new MPI_Status_* man pages

  #13132 merged Mar 11, 2025

• osc/ucx: ignore lock table if "no_locks" info key is set

  #13135 merged Mar 11, 2025

• osc/ucx: ignore lock table if "no_locks" info key is set to true

  #13126 merged Mar 10, 2025

• mpi: add new status_set/get functions

  #13125 merged Mar 8, 2025

• romio: remove it

  #13119 merged Mar 6, 2025

• Fix race condition in coll_han_alltoall.c

  #13115 merged Mar 6, 2025

• v4.1.x: Latest Fedora has dropped the arch suffix from the openjdk directory

  #13122 merged Mar 5, 2025

• accelerator/rocm: minor cleanup

  #13124 merged Mar 5, 2025

• Latest Fedora has dropped the arch suffix from the openjdk directory

  #13117 merged Mar 4, 2025

• comm: use comm instance for value for memkind set

  #13109 merged Mar 4, 2025

• MPI_T: provide a stub implementation of events

  #13086 merged Mar 4, 2025

8 Pull requests opened by 7 people

• Mark mpif.h as deprecated

  #13123 opened Mar 5, 2025

• [Fix] Provided MPI_type_get_content array sizes may exceed actual ones, do not use them

  #13131 opened Mar 7, 2025

• MPI_T Events

  #13133 opened Mar 10, 2025

• Extract the install prefix from the shared library.

  #13147 opened Mar 17, 2025

• v5.0.x: update prte/pmix to latest releases

  #13164 opened Mar 25, 2025

• v5.0.x: A series of minor updates / cleanups

  #13166 opened Mar 25, 2025

• use-mpi-f08: fix prototypes and more

  #13168 opened Mar 25, 2025

• OSC/UCX: plug a memory leak found by valgrind

  #13173 opened Apr 1, 2025

13 Issues closed by 12 people

• RFC: A hierarchical alltoall and alltoallv

  #12001 closed Apr 1, 2025

• Cray CXI SHS11.1 and openmpi@main fail with intra-node communication

  #13148 closed Mar 31, 2025

• Open MPI 5 doesn't work after update to macOS 15.3.1, 4.1 does

  #13129 closed Mar 28, 2025

• How to show the version of OpenMPI from "mpifort" etc.

  #13169 closed Mar 28, 2025

• Install 5.0.6 failed with AMD AOCC 5.0

  #13145 closed Mar 23, 2025

• ompi_datatype_pack_external-related functions need to be embiggened

  #13152 closed Mar 20, 2025

• v4.1.5 UCX_NET_DEVICES not selecting TCP devices correctly

  #12785 closed Mar 19, 2025

• deadlock with mimalloc

  #13149 closed Mar 18, 2025

• Neither `--launch-agent` nor `--mca plm rsh` is respected if OpenMPI thinks the host in question is `localhost`

  #13154 closed Mar 18, 2025

• OpenMPI 5.0.7 does not compile with flang when real128 is not supported

  #13136 closed Mar 17, 2025

• The simple hello-world.c MPI program prints: shmem: mmap: an error occurred while determining whether or not /tmp/ompi.yv.1001/jf.0/3074883584/sm_segment.yv.1001.b7470000.0 could be created

  #12784 closed Mar 16, 2025

• Issue with a build of OpenMPI with LLVM 20.1.0-rc3

  #13116 closed Mar 14, 2025

• ompi_comm_idup_internal calls ompi_info_memkind_copy_or_set even if supplied info arg is NULL

  #13108 closed Mar 6, 2025

19 Issues opened by 15 people

• HAN leaks memory

  #13171 opened Mar 31, 2025

• Memory leak with ROCM-aware OpenMPI with UCX 1.17.0

  #13170 opened Mar 31, 2025

• Encoded show_help text causing compiler warnings

  #13167 opened Mar 25, 2025

• Performance Issues with MPIRun Due to Virtual Network Interfaces

  #13161 opened Mar 25, 2025

• rhel 8 configured with fips enabled

  #13157 opened Mar 19, 2025

• segfault when running Device to Device transfers OpenMPI + LinkX provider on NVidia GPUs

  #13156 opened Mar 18, 2025

• mpirun 5.0.5 - TCP connection failure between hosts with multiple network interfaces

  #13155 opened Mar 18, 2025

• ompi and opal datatype infrastructure should support MPI big count API

  #13153 opened Mar 17, 2025

• ompi win entry points need to be embiggened

  #13151 opened Mar 17, 2025

• Mapping ranks evenly across nodes and across resources within nodes with MPI+OMP codes (--map-by Res:PE=n:span is broken)

  #13143 opened Mar 14, 2025

• Adding another example for testing connectivity

  #13140 opened Mar 12, 2025

• MPIX_Comm_shrink intermittently never returns

  #13138 opened Mar 12, 2025

• "make install" fails on MacOS with flang-new

  #13137 opened Mar 12, 2025

• opal_lifo test fails on FreeBSD amd64

  #13134 opened Mar 11, 2025

• CUDA-aware MPI build on fresh Ubuntu 24.04 LTS, `MPIX_Query_cuda_support()` returns zero

  #13130 opened Mar 6, 2025

• MPI One-sided applications only work via Infiniband adapter as expected, but not via Ethernet adapter

  #13128 opened Mar 6, 2025

• spawn: the final one to fix in ibm test suite

  #13127 opened Mar 5, 2025

• Valgrind suppression writev(vector[...]) does not suppress for recent valgrind

  #13120 opened Mar 3, 2025

• Help with launching MPI application

  #13118 opened Mar 3, 2025

18 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• coll/acoll: Add support for MPI_Alltoall()

  #13046 commented on Mar 27, 2025 • 13 new comments

• Ensure we correctly identify local vs non-local peers

  #13111 commented on Mar 13, 2025 • 0 new comments

• coll/tuned dynamic file in json format

  #13104 commented on Mar 31, 2025 • 0 new comments

• Fix exploding idle ctxs array

  #13061 commented on Mar 11, 2025 • 0 new comments

• Reduced performance of MPI_Allreduce in OpenMPI-5 compared to OpenMPI-4

  #13082 commented on Mar 27, 2025 • 0 new comments

• how to start a mpi process without mpiexec or mpirun?

  #13101 commented on Mar 27, 2025 • 0 new comments

• Unexpected low performance with libfabirc/CXI and openmpi

  #13112 commented on Mar 27, 2025 • 0 new comments

• [Cuda][Rocm?] memory leak in Ipc cache handling

  #12849 commented on Mar 25, 2025 • 0 new comments

• Memory leak with CUDA-aware OpenMPI without UCX

  #12971 commented on Mar 25, 2025 • 0 new comments

• openmpi osc_ucx_component error

  #12517 commented on Mar 19, 2025 • 0 new comments

• `--stream-buffering=0` is not behaving as expected

  #13087 commented on Mar 14, 2025 • 0 new comments

• MPI 4.1 - need to check MPI_WIN_SYNC for correct behavior for windows using shared memory

  #12187 commented on Mar 11, 2025 • 0 new comments

• MPI 4.1 - need to implement MPI_Comm_attach_buffer and related functions

  #12074 commented on Mar 11, 2025 • 0 new comments

• mpi4.1: allow MPI_COMM_NULL to be passed to MPI_Comm_get_name

  #12079 commented on Mar 11, 2025 • 0 new comments

• opal_lifo test fails on s390x

  #10988 commented on Mar 9, 2025 • 0 new comments

• Freeze or error using function MPI_Comm_connect

  #13076 commented on Mar 6, 2025 • 0 new comments

• MPI 4.1 - implement API to access and update MPI_Status public fields

  #12073 commented on Mar 5, 2025 • 0 new comments

• MPI 4.1 - implement memory allocation kind info

  #12189 commented on Mar 5, 2025 • 0 new comments