It turns out that the alps plm code was developed only
on cray systems that were running batch schedulers.
However, for bring up and development systems, its not
at all uncommon for there to be no batch scheduler, and
thus to orte it appears that orte_num_allocated_nodes
is always zero. This forces a user using mpirun on such
a system to always specify a host list:
mpirun -n 4 -N 1 -host 32,45,68 ....
just to get the job to run, but then since the -L argument for aprun
is never built, the app always runs on the first batch of nodes that
aprun finds available.
8ded59ce0f