// partial order across them.
func (s *socketsFirst) sortAvailableNUMANodes() []int {
	var result []int
	for _, socket := range s.sortAvailableSockets() {
		numas := s.acc.details.NUMANodesInSockets(socket).UnsortedList()
		s.acc.sort(numas, s.acc.details.CPUsInNUMANodes)
		result = append(result, numas...)
	}
	return result
}