Hi,
I need to access the message envelope/metadata structure that is sent along
with/before the message is sent to UCX completely.
Is this available at the OpenMPI code or, is now completely passed to the UCX
now?
I tried to figure it out myself but got lost. Any help is appreciated.
Best,
K
Hi,
As far as I know, the message transfer knowledge of OpenMPI when using PML/UCX
is pretty minimal.
When sending a message, the arguments are passed to UCX as is (here
https://github.com/open-mpi/ompi/blob/main/ompi/mca/pml/ucx/pml_ucx.c#L840)
The UCX tag is a combination of MPI tag and commun
