libibverbs1-dbg 1.2.1-2ubuntu1 (s390x binary) in ubuntu bionic

 libibverbs is a library that allows userspace processes to use RDMA
 "verbs" as described in the InfiniBand Architecture Specification and
 the RDMA Protocol Verbs Specification. iWARP ethernet NICs support
 RDMA over hardware-offloaded TCP/IP, while InfiniBand is a
 high-throughput, low-latency networking technology. InfiniBand host
 channel adapters (HCAs) and iWARP NICs commonly support direct
 hardware access from userspace (kernel bypass), and libibverbs
 supports this when available.
 .
 This package contains the debugging symbols associated with
 libibverbs1. They will automatically be used by gdb for debugging
 libibverbs-related issues.