Both opal_hwloc_base_get_relative_locality() and _get_locality_string()
iterate over hwloc levels to build the proc locality information.
Unfortunately, NUMA nodes are not in those normal levels anymore since 2.0.
We have to explicitly look a the special NUMA level to get that locality info.
I am factorizing the core of the iterations inside dedicated "_by_depth"
functions and calling them again for the NUMA level at the end of the loops.
Thanks to Hatem Elshazly for reporting the NUMA communicator split failure
at https://www.mail-archive.com/users@lists.open-mpi.org/msg33589.html
It looks like only the opal_hwloc_base_get_locality_string() part is needed
to fix that split, but there's no reason not to fix get_relative_locality()
as well.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>
ea80a20e10