ibacm 27.0-2ubuntu3 (s390x binary) in ubuntu focal

 The IB ACM implements and provides a framework for name, address, and
 route (path) resolution services over InfiniBand.
 It is intended to address connection setup scalability issues running
 MPI applications on large clusters. The IB ACM provides information
 needed to establish a connection, but does not implement the CM protocol.
 A primary user of the ibacm service is the librdmacm library.