Just some observations from a concerned user with a temperamental Open
MPI program (1.4.3):
Fedora 14 (just released) includes glibc-2.12 which has optimized
versions of memcpy, including a copy backward.
http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=6fb8cbcb58a29fff73eb2101b34caa19a7f88eba
I think the overlapping memcpy issue reported previously may be actively
triggered by this optimized memcpy and produce incorrect data.
Related posts:
http://www.open-mpi.org/community/lists/users/2009/04/9069.php
http://www.open-mpi.org/community/lists/users/2008/01/4918.php
http://www.open-mpi.org/community/lists/users/2007/08/3872.php
Original developer response:
http://www.open-mpi.org/community/lists/users/2007/08/3873.php
Current ticket:
https://svn.open-mpi.org/trac/ompi/ticket/1903
