[MPICH2-dev] MPICH2 1.0.6 release candidate 1

[Rajeev Thakur]

Dear all,
         A release candidate for the next release of MPICH2 (1.0.6) is
available from ftp://ftp.mcs.anl.gov/pub/mpi/mpich2-1.0.6-rc1.tar.gz. Please
try it
out if you like and let us know if you encounter any problems. If all is
well, we plan to release 1.0.6 in a few days.

Regards,
The MPICH2 Team


Main changes in 1.0.6

- Updates to the ch3:nemesis channel including preliminary support for
thread safety.
- Preliminary support for dynamic loading of ch3 channels (sock, ssm, shm). 
- Singleton init now works with the MPD process manager.
- Fixes in MPD related to MPI-2 connect-accept.
- Improved support for MPI-2 generalized requests that allows true
nonblocking I/O in ROMIO.
- MPE changes:
  * Enabled thread-safe MPI logging through global mutex.
  * Enhanced Jumpshot to be more thread friendly
    + added simple statistics in the Legend windows.
  * Added backtrace support to MPE on Solaris and glibc based systems,
    e.g. Linux.  This improves the output error message from the 
    Collective/Datatype checking library.
  * Fixed the CLOG2 format so it can be used in serial (non-MPI) logging.
- Performance improvements for derived datatypes (including packing and
communication) through in-built loop-unrolling and buffer alignment.
- Performance improvements for MPI_Gather when non-power-of-two processes
are used, and when a non-zero ranked root is performing the gather.
- MPI_Comm_create works for intercommunicators.
- Enabled -O2 and equivalent compiler optimizations for supported compilers
by default.
- Many other bug fixes and code cleanup. A full list of change comments from
the CVS commits is available at
www.mcs.anl.gov/mpi/mpich2/mpich2_1_0_6changes.htm .