EXAMPLES/UCT: Fix uct_hello_world to run over intra-node components

[Honggang-LI]

What

Fix uct_hello_world to support intra-node components. For example:

ucx (master +)]$ ./examples/uct_hello_world -d memory -t sysv
INFO: UCT_HELLO_WORLD AM function = uct_ep_am_short server = (null) port = 13337
Using sysv/memory
Waiting for connection...


----- UCT TEST SUCCESS ----

[callback] uct_ep_am_short sent ABCDEFGHIJKLMNO (16 bytes)

---------------------------


----- UCT TEST SUCCESS ----

[main] uct_ep_am_short sent ABCDEFGHIJKLMNO (16 bytes)

---------------------------

ucx (master +)]$ ./examples/uct_hello_world -d memory -t sysv -n localhost
INFO: UCT_HELLO_WORLD AM function = uct_ep_am_short server = localhost port = 13337
Using sysv/memory

Why ?

#7551

How ?

1. Only ZCOPY test needs the UCT MD to support registration.

2. Exchange the iface address before test reachable.

Signed-off-by: Honggang Li [email protected]

[swx-jenkins4]

Can one of the admins verify this patch?