Open MPI v4.1.1rc1 is now available at
https://www.open-mpi.org/software/ompi/v4.1/
Changes and fixes since the 4.1.0 release include:
- Reverted temporary solution that worked around launch issues in
SLURM v20.11.{0,1,2}. SchedMD encourages users to avoid these
versions and to upgrade to v20.11.3 or newer.
- Fixed configuration issue on Apple Silicon observed with
Homebrew. Thanks to François-Xavier Coudert for reporting the issue.
- Disabled gcc built-in atomics by default on aarch64 platforms.
- Fixed SLURM support to mark ORTE daemons as non-MPI tasks.
- Improved AVX detection to more accurately detect supported
platforms. Also improved the generated AVX code, and switched to
using word-based MCA params for the op/avx component (vs. numeric
big flags).
- Improved OFI compatibility support and fixed memory leaks in error
handling paths.
- Fixed MPI debugger support (i.e., the MPIR_Breakpoint() symbol).
Thanks to @louisespellacy-arm for reporting the issue.
- Removed PML uniformity check from the UCX PML to address performance
regression.
- Fixed MPI_Init_thread(3) statement about C++ binding and update
references about MPI_THREAD_MULTIPLE. Thanks to Andreas Lösel for
bringing the outdated docs to our attention.
- Added fence_nb to Flux PMIx support to address segmentation faults.
- Ensured progress of AIO requests in the POSIX FBTL component to
prevent exceeding maximum number of pending requests on MacOS.
- Used OPAL's mutli-thread support in the orted to leverage atomic
operations for object refcounting.
- Fixed segv when launching with static TCP ports.
- Fixed --debug-daemons mpirun CLI option.
- Fixed bug where mpirun did not honor --host in a managed job
allocation.
- Made a managed allocation filter a hostfile/hostlist.
- Fixed bug to marked a generalized request as pending once initiated.
- Fixed external PMIx v4.x check.
- Fixed OSHMEM build with `--enable-mem-debug`.
Please test and report issues via email to
devel@lists.open-mpi.org<mailto:devel@lists.open-mpi.org>, or open a Github
issue at https://github.com/open-mpi/ompi/issues/.
Raghu
