[Bug 296136] net/ucx: Fix cross-process loopback initialization and TCP endpoint timeouts

From: <bugzilla-noreply_at_freebsd.org>
Date: Thu, 18 Jun 2026 20:35:53 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=296136

--- Comment #1 from Generic Rikka <rikka.goering@outlook.de> ---
Sorry, just noticed that I messed up the OpenMPI Runtime integration command,
the correct command is:
env UCX_TLS=tcp,self UCX_NET_DEVICES=lo0 /usr/local/mpi/openmpi/bin/mpirun \
    --mca pml ucx \
    --mca osc ^ucx \
    --mca io ^ompio \
    --mca opal_common_ucx_tls any \
    --mca opal_common_ucx_devices any \
    -np 2 \
    IMB-IO-openmpi

Thus only restoring single node multi-process communication, since this fix is
limited to loopback for now.

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