Hello, I am still new to RoCEv2 and have created a test utility patterned after the rc_pingpong.c libibverbs example, but using RDMA WRITE instead of RDMA SEND. I discovered that when one machine sends a read, the other machine acknowledges but does not indicate any completion on the CQ. This means userspace never wakes up to do its "pong" code. The cause of this is that IB_OPCODE_RC_SEND_LAST has RXE_COMP_MASK associated (http://lxr.free-electrons.com/source/drivers/infiniband/sw/rxe/rxe_opcode.c#L149), but IB_OPCODE_RC_RDMA_WRITE_LAST does not. Can someone please help me understand why SEND LAST would trigger the CQ (creating a CQE, if I understand correctly) even in the non-immediate case? Page 170 of the Infiniband spec (vol 1, release 1.3) suggests the CQE is only created for such packets with immediate data (ImmDt header). Also for reference, page 531 of the Infiniband spec talks about signaled completions and the conditions which cause a CQE to be generated. Thanks, -J -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
