VRANK              29 ompi/mca/coll/portals4/coll_portals4_gather.c #define VRANK(ra, ro, si) ((ra - ro + si) % si)
VRANK              28 ompi/mca/coll/portals4/coll_portals4_scatter.c #define VRANK(ra, ro, si) ((ra - ro + si) % si)