openmpi/NEWS

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Copyright (c) 2006      Voltaire, Inc. All rights reserved.
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===========================================================================

This file contains the main features as well as overviews of specific
bug fixes (and other actions) for each version of Open MPI since
version 1.0.

1.2
---

- Addition of OpenIB-based unreliable datagram BTL ("ud").
- Addition of UDAPL BTL ("udapl").


Post 1.1 -- not yet decided if 1.2 or 1.1.1
-------------------------------------------

- Allow propagation of SIGUSR1 and SIGUSR2 signals from mpirun to
  back-end MPI processes.
- Add -V/--version switch to mpirun.


1.1
---

- Various MPI datatype fixes, optimizations.
- Fixed various problems on the SPARC architecture (e.g., not
  correctly aligning addresses within structs).
- Addition of "dr" pml component (data reliability) for running in
  unreliable networks (such as those at high altitudes).  Includes
  functionality for retransmission due to problems with end-to-end
  data content checking or loss of data in the network.
- Improvements in various run-time error messages to be more clear
  about what they mean and where the errors are occurring.
- Various fixes to mpirun's handling of --prefix.
- Updates and fixes for Cray/Red Storm support.
- Major improvements to the Fortran 90 MPI bindings:
  - General improvements in compile/linking time and portability
    between different F90 compilers.
  - Addition of "trivial", "small" (the default), and "medium"
    Fortran 90 MPI module sizes (v1.0.x's F90 module was
    equivalent to "medium").  See the README file for more
    explanation.
  - Fix various MPI F90 interface functions and constant types to
    match.  Thanks to Michael Kluskens for pointing out the problems
    to us.
- Allow short messagees to use RDMA (vs. send/receive semantics) to a
  limited number peers in both the mvapi and openib BTL components.
  This reduces communication latency over IB channels.
- Numerous performance improvements throughout the entire code base.
- Many minor threading fixes.
- Add a define OMPI_SKIP_CXX to allow the user to skip the mpicxx.h from
  being included in mpi.h. It allows the user to compile C code with a CXX
  compiler without including the CXX bindings.
- PERUSE support has been added. In order to activate it add
  --enable-peruse to the configure options. All events described in
  the PERUSE 2.0 draft are supported, plus one Open MPI
  extension. PERUSE_COMM_REQ_XFER_CONTINUE allow to see how the data
  is segmented internally, using multiple interfaces or the pipeline
  engine. However, this version only support one event of each type
  simultaneously attached to a communicator.
- Add support for running jobs in heterogeneous environments.
  Currently supports environments with different endianness and
  different representations of C++ bool and Fortran LOGICAL.
  Mismatched sizes for other datatypes is not supported.
- Open MPI now includes an implementation of the MPI-2 One-Sided
  Communications specification.
- Open MPI is now configurable in cross-compilation environments.
  Several Fortran 77 and Fortran 90 tests need to be pre-seeded with
  results from a config.cache-like file.
- Add --debug option to mpirun to generically invoke a parallel debugger.


1.0.3
-----

- Require that the openib BTL find <sysfs/libsysfs.h>.  Thanks to Josh
  Aune for the suggestion.
- Include updates to support the upcoming Autoconf 2.60 and Libtool
  2.0.  Thanks to Ralf Wildenhues for all the work!
- Fix bug with infinite loop in the "round robin" process mapper.
  Thanks to Paul Donohue for reporting the problem.
- Enusre that memory hooks are removed properly during MPI_FINALIZE.
  Thanks to Neil Ludban for reporting the problem.
- Various fixes to the included support for ROMIO.
- Fix to ensure that MPI_LONG_LONG and MPI_LONG_LONG_INT are actually
  synonyms, as defined by the MPI standard.  Thanks to Martin Audet
  for reporting this.
- Fix Fortran 90 configure tests to properly utilize LDFLAGS and LIBS.
  Thanks to Terry Reeves for reporting the problem.
- Fix shared memory progression in asynchronous progress scenarios.
  Thanks to Mykael Bouquey for reporting the problem.
- Fixed back-end operations for predefined MPI_PROD for some
  datatypes.  Thanks to Bert Wesarg for reporting this.
- Adapted configure to be able to handle Torque 2.1.0p0's (and above)
  new library name.  Thanks to Brock Palen for pointing this out and
  providing access to a Torque 2.1.0p0 cluster to test with.
- Fixed situation where mpirun could set a shell pipeline's stdout
  to non-blocking, causing the shell pipeline to prematurely fail.
  Thanks to Darrell Kresge for figuring out what was happening.
- Fixed problems with leave_pinned that could cause Badness with the
  mvapi BTL.
- Fixed problems with MPI_FILE_OPEN and non-blocking MPI-2 IO access.
- Fixed various InfiniBand port matching issues during startup.
  Thanks to Scott Weitzenkamp for identifying these problems.
- Fixed various configure, build and run-time issues with ROMIO.
  Thanks to Dries Kimpe for bringing them to our attention.
- Fixed error in MPI_COMM_SPLIT when dealing with intercommunicators.
  Thanks to Bert Wesarg for identifying the problem.
- Fixed backwards handling of "high" parameter in MPI_INTERCOMM_MERGE.
  Thanks to Michael Kluskens for pointing this out to us.
- Fixed improper handling of string arguments in Fortran bindings
  for MPI-IO functionality
- Fixed segmentation fault with 64 bit applications on Solaris when
  using the shared memory transports.
- Fixed MPI_COMM_SELF attributes to free properly at the beginning of
  MPI_FINALIZE.  Thanks to Martin Audet for bringing this to our
  attention.
- Fixed alignment tests for cross-compiling to not cause errors with
  recent versions of GCC.


1.0.2
-----

- Fixed assembly race condition on AMD64 platforms.
- Fixed residual .TRUE. issue with copying MPI attributes set from
  Fortran.
- Remove unnecessary logic from Solaris pty I/O forwarding.  Thanks to
  Francoise Roch for bringing this to our attention.
- Fixed error when count = 0 was given for multiple completion MPI
  functions (MPI_TESTSOME, MPI_TESTANY, MPI_TESTALL, MPI_WAITSOME,
  MPI_WAITANY, MPI_WAITALL).
- Better handling in MPI_ABORT for when peer processes have already
  died, especially under some resource managers.
- Random updates to README file, to include notes about the Portland
  compilers.
- Random, small threading fixes to prevent deadlock.
- Fixed a problem with handling long mpirun app files.  Thanks to Ravi
  Manumachu for identifying the problem.
- Fix handling of strings in several of the Fortran 77 bindings.
- Fix LinuxPPC assembly issues.  Thanks to Julian Seward for reporting 
  the problem.
- Enable pty support for standard I/O forwarding on platforms that
  have ptys but do not have openpty().  Thanks to Pierre Valiron for
  bringing this to our attention.
- Disable inline assembly for PGI compilers to avoid compiler errors.
  Thanks to Troy Telford for bringing this to our attention.
- Added MPI_UNSIGNED_CHAR and MPI_SIGNED_CHAR to the allowed reduction
  types.
- Fix a segv in variable-length message displays on Opterons running
  Solaris.  Thanks to Pierre Valiron for reporting the issue.
- Added MPI_BOOL to the intrinsic reduction operations MPI_LAND,
  MPI_LOR, MPI_LXOR.  Thanks to Andy Selle for pointing this out to us.
- Fixed TCP BTL network matching logic during MPI_INIT; in some cases
  on multi-NIC nodes, a NIC could get paired with a NIC on another
  network (typically resulting in deadlock).  Thanks to Ken Mighell
  for pointing this out to us.
- Change the behavior of orterun (mpirun, mpirexec) to search for
  argv[0] and the cwd on the target node (i.e., the node where the
  executable will be running in all systems except BProc, where the
  searches are run on the node where orterun is invoked).
- Fix race condition in shared memory transport that could cause
  crashes on machines with weak memory consistency models (including
  POWER/PowerPC machines).
- Fix warnings about setting read-only MCA parameters on bproc systems.
- Change the exit status set by mpirun when an application process is
  killed by a signal.  The exit status is now set to signo + 128, which
  conforms with the behavior of (almost) all shells.
- Correct a datatype problem with the convertor when partially
  unpacking data. Now we can position the convertor to any position
  not only on the predefined types boundaries. Thanks to Yvan Fournier
  for reporting this to us.
- Fix a number of standard I/O forwarding issues, including the
  ability to background mpirun and a loss of data issue when
  redirecting mpirun's standard input from a file.
- Fixed bug in ompi_info where rcache and bml MCA parameters would not
  be displayed.
- Fixed umask issues in the session directory.  Thanks to Glenn Morris
  for reporting this to us.
- Fixed tcsh-based LD_LIBRARY_PATH issues with --prefix.  Thanks to
  Glen Morris for identifying the problem and suggesting the fix.
- Removed extraneous \n's when setting PATH and LD_LIBRARY_PATH in the
  rsh startup.  Thanks to Glen Morris for finding these typos.
- Fixed missing constants in MPI C++ bindings.
- Fixed some errors caused by threading issues.
- Fixed openib BTL flow control logic to not overrun the number of
  send wqes available.
- Update to match newest OpenIB user-level library API.  Thanks to
  Roland Dreier for submitting this patch.
- Report errors properly when failing to register memory in the openib
  BTL.
- Reduce memory footprint of openib BTL.
- Fix parsing problem with mpirun's "-tv" switch.  Thanks to Chris
  Gottbrath for supplying the fix.
- Fix Darwin net/if.h configure warning.
- The GNU assembler unbelievably defaults to making stacks executable.
  So when using gas, add flags to explicitly tell it to not make
  stacks executable (lame but necessary).
- Add missing MPI::Request::Get_status() methods.  Thanks to Bill
  Saphir for pointing this out to us.
- Improved error messages on memory registration errors (e.g., when
  using high-speed networks).
- Open IB support now checks firmware for how many outstanding RDMA
  requests are supported.  Thanks to Mellanox for pointing this out to
  us.
- Enable printing of stack traces in MPI processes upon SIGBUS,
  SIGSEGV, and SIGFPE if the platform supports it.
- Fixed F90 compilation support for the Lahey compiler.
- Fixed issues with ROMIO shared library support.
- Fixed internal accounting problems with rsh support.
- Update to GNU Libtool 1.5.22.
- Fix error in configure script when setting CCAS to ias (the Intel
  assembler).
- Added missing MPI::Intercomm collectives.
- Fixed MPI_IN_PLACE handling for Fortran collectives.
- Fixed some more C++ const_cast<> issues.  Thanks for Martin Audet
  (again) for bringing this to our attention.
- Updated ROMIO with the version from MPICH 1.2.7p1, marked as version
  2005-06-09.
- Fixes for some cases where the use of MPI_BOTTOM could cause
  problems.
- Properly handle the case where an mVAPI does not have shared receive
  queue support (such as the one shipped by SilverStorm / Infinicon
  for OS X).


1.0.1
-----

- Fixed assembly on Solaris AMD platforms.  Thanks to Pierre Valiron
  for bringing this to our attention.
- Fixed long messages in the send-to-self case.
- Ensure that when the "leave_pinned" option is used, the memory hooks
  are also enabled.  Thanks to Gleb Natapov for pointing this out.
- Fixed compile errors for IRIX.
- Allow hostfiles to have integer host names (for BProc clusters).
- Fixed a problem with message matching of out-of-order fragments in
  multiple network device scenarios.
- Converted all the C++ MPI bindings to use proper const_cast<>'s
  instead of old C-style casts to get rid of const-ness.  Thanks to
  Martin Audet for raising the issue with us.
- Converted MPI_Offset to be a typedef instead of a #define because it
  causes problems for some C++ parsers.  Thanks to Martin Audet for
  bringing this to our attention.
- Improved latency of TCP BTL.
- Fixed index value in MPI_TESTANY to be MPI_UNDEFINED if some
  requests were not MPI_REQUEST_NULL, but no requests finished.
- Fixed several Fortran MPI API implementations that incorrectly used
  integers instead of logicals or address-sized integers.
- Fix so that Open MPI correctly handles the Fortran value for .TRUE.,
  regardless of what the Fortran compiler's value for .TRUE. is.
- Improved scalability of MX startup.
- Fix datatype offset handling in the coll basic component's
  MPI_SCATTERV implementation.
- Fix EOF handling on stdin.
- Fix missing MPI_F_STATUS_IGNORE and MPI_F_STATUSES_IGNORE
  instanatiations.  Thanks to Anthony Chan for pointing this out.
- Add a missing value for MPI_WIN_NULL in mpif.h.
- Bring over some fixes for the sm btl that somehow didn't make it
  over from the trunk before v1.0.  Thanks to Beth Tibbitts and Bill
  Chung for helping identify this issue.
- Bring over some fixes for the iof that somehow didn't make it over
  from the trunk before v1.0.
- Fix for --with-wrapper-ldflags handling.  Thanks to Dries Kimpe for
  pointing this out to us.


1.0
---

Initial public release.