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pml/ucx: Propagate MPI serialized thread mode #12613

Open tvegas1 opened 3 weeks ago

tvegas1 commented 3 weeks ago

backport #12608 from v5.0.x

Also added osc/ucx thread mode and tested with mpirun -mca osc ucx osu_get_latency.

tvegas1 commented 3 weeks ago

@brminich, @yosefe, @bosilca can you please review?

tvegas1 commented 3 weeks ago

After testing for osc/ucx, retested ucx worker creation init paths using: