[mvapich-discuss] NaNs from non-blocking comms

[Dan Kokron]

Using mvapich2-1.6 configured and built under x86_64 Linux with

Intel-11.0.083 suite of compilers

./configure CC=icc CXX=icpc F77=ifort F90=ifort CFLAGS=-fpic
CXXFLAGS=-fpic FFLAGS=-fpic F90FLAGS=-fpic
--prefix=/home/dkokron/play/mvapich2-1.6/install/intel --enable-f77
--enable-f90 --enable-cxx --enable-romio --with-hwloc

The attached example code gives NaN's as output from the MPI_Recv if
MV2_ON_DEMAND_THRESHOLD is set to be less than the number of processes
used.

The example also gives NaNs using IntelMPI-4.0.1.002 if
I_MPI_USE_DYNAMIC_CONNECTIONS=enable

See the 'commands' file in the tarball for more information.
-- 
Dan Kokron
Global Modeling and Assimilation Office
NASA Goddard Space Flight Center
Greenbelt, MD 20771
Daniel.S.Kokron at nasa.gov
Phone: (301) 614-5192
Fax:   (301) 614-5304
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