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Subject: [OMPI devel] 1.6.1rc1 posted
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2012-07-27 22:20:31

Finally! It's in the usual place:

Please test, especially with low-registered-memory-available scenarios with Mellanox OpenFabrics devices.

Here's a list of changes since 1.6:

- A bunch of changes to eliminate hangs on OpenFabrics-based networks.
  Users with Mellanox hardware are ***STRONGLY ENCOURAGED*** to check
  their registered memory kernel module settings to ensure that the OS
  will allow registering more than 8GB of memory. See this FAQ item
  for details:

  - Fall back to send/receive semantics if registered memory is
    unavilable for RDMA.
  - Fix two fragment leaks when registered memory is exhausted.
  - Hueristically determine how much registered memory is available
    and warn if it's significantly less than all of RAM.
  - Artifically limit the amount of registered memory each MPI process
    can use to about 1/Nth to total registered memory available.
  - Improve error messages when events occur that are likely due to
    unexpected registered memory exhaustion.
  - Remove the last openib default per-peer receive queue
    specification (and make it an SRQ).

- Switch the MPI_ALLTOALLV default algorithm to a pairwise exchange.
- Increase the openib BTL default CQ length to handle more types of
  OpenFabrics devices.
- Lots of VampirTrace fixes; upgrade to v5.13.0.4.
- Map MPI_2INTEGER to underlying MPI_INTEGERs, not MPI_INTs.
- Ensure that the OMPI version number is toleant of handling spaces.
  Thanks to dragonboy for identifying the issue.
- Fixed IN parameter marking on Fortran "mpi" module
  MPI_COMM_TEST_INTER interface.
- Various MXM improvements.
- Make the output of "mpirun --report-bindings" much more friendly /
- Properly handle MPI_COMPLEX8|16|32.
- More fixes for mpirun's processor affinity options (--bind-to-core
  and friends).
- Use aligned memory for OpenFabrics registered memory.
- Multiple fixes for parameter checking in MPI_ALLGATHERV,
  mpi4py community (Bennet Fauber, Lisandro Dalcin, Jonathan Dursi).
- Fixed file positioning overflows in MPI_FILE_GET_POSITION,
- Removed the broken --cpu-set mpirun option.
- Fix cleanup of MPI errorcodes. Thanks to Alexey Bayduraev for the
- Fix default hostfile location. Thanks to Götz Waschk for noticing
  the issue.
- Improve several error messages.

Jeff Squyres
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