RDMA - how does the ibv_post_send know the CQ?

Question

I'm trying to learn RDMA.

My question is, when doing ibv_post_send , I should get a completion event on a completion queue. But how does the ibv_post_send know to which completion queue? From what I see here, I could have created many .

Answer 1

事实证明，启动QP时 ，可以在其init属性中将其分配给发送CQ和recv CQ。