Evgeny Leksikov

@brminich can we remove [this](https://github.com/openucx/ucx/blob/b5d81f91bd4c1ffe4082d68ea5dbc7344653a464/test/gtest/ucp/test_ucp_tag_offload.cc#L720) in this PR? it can be tested manually with `UCX_PROTO_ENABLE=y gtest ...`

@hoopoepg FYI

also reproducible on jazz

replaced with https://github.com/openucx/ucx/pull/8467

/azp run

/azp run

@changchengx pls tag me in correct PR when it's ready to review and we'll continue conversation there

@eakneller could you please share `rdma-core` version and check `ib_send_bw` test with `-z` parameter: ``` -z, --com_rdma_cm Communicate with rdma_cm module to exchange data - use regular QPs ```

@eakneller can you check if it works with some older UCX version? this is an old NIC and we could try to figure out if the root cause is change...

I would suggest go back one by one released versions then bisect to identify exact regression.