CQ moderation enables the user to moderate completion events by specifying the number of completions that cause an event and the timeout in micro seconds to cause the event even if the number of completions was not reached.

CQ Moderation Experimental Verbs 

• ibv_exp_modify_cq
  • cq_count
  • cq_period

CQ Moderation Experimental Capabilities

IBV_EXP_CQ_ATTR_MODERATION

CQ Moderation RDMA-Core Verbs

• ibv_modify_cq
  • ibv_moderate_cq

Relevant Man Pages

ibv_modify_cq: https://github.com/linux-rdma/rdma-core/blob/master/libibverbs/man/ibv_modify_cq.3