[mvapich-discuss] is something else turned off by VIADEV_USE_SHMEM_COLL=0 ?

[Dan Kokron]

I have an application that runs okay with the following command line 
using mvapich-1.1rc1 (disabling the SHMEM collectives is necessary to 
get it to run).

runs;
mpirun_rsh -ssh -np $NPES -hostfile machinefile VIADEV_USE_SHMEM_COLL=0 
./Application

however if I disable each collective individually on a single command 
line, it fails in the same manner as when the collectives are defaulted.

e.g.
mpirun_rsh -ssh -np $NPES -hostfile machinefile 
VIADEV_USE_SHMEM_ALLREDUCE=0 VIADEV_USE_SHMEM_REDUCE=0 
VIADEV_USE_SHMEM_BARRIER=0 VIADEV_USE_SHMEM_BCAST=0 
VIADEV_USE_NEW_ALLGATHER=0 ./Application

fails just like ...
mpirun_rsh -ssh -np $NPES -hostfile machinefile ./Application

Does setting VIADEV_USE_SHMEM_COLL=0 disable more code paths than 
indicated in the documentation?

Sec 5.4 of
http://mvapich.cse.ohio-state.edu/support/mvapich_user_guide-1.1.pdf

-- 
Dan Kokron