Thomas Vegas

> just for my understanding, do we have a repro (ucx_perftest, some osu tests..) with perf gain on applicable cpu? saw description now, any perftest reproducer (maybe with xpmem/shmem) on...

> seems that `UCP_OP_ATTR_FLAG_NO_IMM_CMPL` is not really supported for `put_nbx` can you pls fix it in this pr then? it is supported inside `ucp_put_send_short()` so we should be good i...

> indeed, then can we move `attr_mask` initialization to protov1 section to avoid unneeded overhead for protov2? makes sense, removed it altogether.

we'd also need `NEWS` file update under rc3?

fixing in ucx with #9696

is #9696 it needed in previous versions?

v1.16.x backport: #9702

merged in master and v1.16.x

Tested successfully master and v1.15 with: - client: `./examples/ucp_client_server -s 100 -a X.X.X.X` - server: `./examples/ucp_client_server -s 100` Also tested with added `-c am` on both side. Do you also...

yes once, so `-s` parameter is needed also on server side.