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This PR adds the support for Eviden's communication library, UBCL (Unified Bxi Communication Layer), by the addition of a PML/UBCL and of an OSC/UBCL, thus enabling MPI communications through the BXI network.
Both components are currently maintained by us.

We are also currently working on joining the MTT efforts to continuously validate these components on our infrastructure.

Note: The PML does not yet support MPI_Session and the OSC does not yet support accelerators buffers. We plan on implementing these features in the future.

Co-authored-by: Florent GERMAIN <[email protected]>
Co-authored-by: Pierre LEMARINIER <[email protected]>
Co-authored-by: Antoine CAPRA <[email protected]>
Co-authored-by: Emmanuel BRELLE <[email protected]>
Co-authored-by: Van Man NGUYEN <[email protected]>
Co-authored-by: Julien DUPRAT <[email protected]>
Co-authored-by: Tristan CALS <[email protected]>
Co-authored-by: Anton DAUMEN <[email protected]>
Co-authored-by: Alice CARIBONI <[email protected]>
Co-authored-by: François WELLENREITER <[email protected]>

Signed-off-by: Van Man NGUYEN <[email protected]>
@hppritcha hppritcha self-requested a review October 28, 2025 16:05
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