The Open MPI Team, representing a consortium of research, academic, and industry partners, is pleased to announce the release of Open MPI version 1.3.4. This release is mainly a bug fix release over the v1.3.4 release, but there are few new features, including support for new processor affinity options from mpirun(1) (see the man page for details). We strongly recommend that all users upgrade to version 1.3.4 if possible.

Version 1.3.4 can be downloaded from the main Open MPI web site or any of its mirrors (mirrors will be updating shortly).

Here is a list of changes in v1.3.4 as compared to v1.3.3

- Fix some issues in OMPI's SRPM with regard to shell_scripts_basename
  and its use with mpi-selector.  Thanks to Bill Johnstone for
  pointing out the problem.
- Added many new MPI job process affinity options to mpirun.  See the
  newly-updated mpirun(1) man page for details.
- Several updates to mpirun's XML output.
- Update to fix a few Valgrind warnings with regards to the ptmalloc2
  allocator and Open MPI's use of PLPA.
- Many updates and fixes to the (non-default) "sm" collective
  component (i.e., native shared memory MPI collective operations).
- Updates and fixes to some MPI_COMM_SPAWN_MULTIPLE corner cases.
- Fix some internal copying functions in Open MPI's use of PLPA.
- Correct some SLURM nodelist parsing logic that may have interfered
  with large jobs.  Additionally, per advice from the SLURM team,
  change the environment variable that we use for obtaining the job's
- Revert to an older, safer (but slower) communicator ID allocation
- Fixed minimum distance finding for OpenFabrics devices in the openib
- Relax the parameter checking MPI_CART_CREATE a bit.
- Fix MPI_COMM_SPAWN[_MULTIPLE] to only error-check the info arguments
  on the root process.  Thanks to Federico Golfre Andreasi for
  reporting the problem.
- Fixed some BLCR configure issues.
- Fixed a potential deadlock when the openib BTL was used with
- Fixed dynamic rules selection for the "tuned" coll component.
- Added a launch progress meter to mpirun (useful for large jobs; set
  the orte_report_launch_progress MCA parameter to 1 to see it).
- Reduced the number of file descriptors consumed by each MPI process.
- Add new device IDs for Chelsio T3 RNICs to the openib BTL config file.
- Fix some CRS self component issues.
- Added some MCA parameters to the PSM MTL to tune its run-time
- Fix some VT issues with MPI_BOTTOM/MPI_IN_PLACE.
- Man page updates from the Debain Open MPI package maintainers.
- Add cycle counter support for the Alpha and Sparc platforms.
- Pass visibility flags to libltdl's configure script, resulting in
  those symbols being hidden.  This appears to mainly solve the
  problem of applications attempting to use different versions of
  libltdl from that used to build Open MPI.

Jeff Squyres

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