Backport MTL/BTL Fabric and Domain sharing patches #13462
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Signed-off-by: Jessie Yang <[email protected]> (cherry picked from commit f65f900)
Add FI_COMPLETION flag to ensure completion entries are generated for all data transfer operations. Signed-off-by: Jessie Yang <[email protected]> (cherry picked from commit 15fe246)
Share the domain between the MTL and BTL layers to reduce the total number of domains created. This helps avoid hitting system resource limits on platforms with high core counts. Instead of having the common code allocate a single domain with the superset of all required capabilities, we attempt to reuse an existing fabric and domain if the providers can support MTL’s and BTL’s different capability sets. This approach allows providers that support domain sharing to reuse resources efficiently while still preserving flexibility. If the providers cannot reuse the fabric and domain due to incompatible requirements, separate domains will be created as before. Signed-off-by: Jessie Yang <[email protected]> (cherry picked from commit 69d2737)
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Backport of #13415 to the v5.0.x branch. This patch series fixes a couple of places where we weren't conforming to the Libfabric spec, but also adds a bugfix for EFA systems, allowing the BTL and MTL to share the same Fabric and Domain (but still use different endpoints).