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Topo aware coll comm v2 #12032

Merged
merged 2 commits into from
Dec 2, 2023
Merged

Topo aware coll comm v2 #12032

merged 2 commits into from
Dec 2, 2023

Commits on Dec 2, 2023

  1. communicator: introduce OMPI_COMM_DISJOINT flag 

    This patch introduces a new communicator flag to indicate if no
processes share the same node.

This flag is intended for optimization of hierarchy-aware collective
operations to select the more efficient transport/algorithm.

In this change we introduce a non-blocking allreducestep in communicator
activation and set the new flag in the completion callback function.

Signed-off-by: Wenduo Wang <[email protected]>
    @wenduwan
    wenduwan committed Dec 2, 2023
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  2. communicator: add assertion on OMPI_COMM_DISJOINT flag 

    This patch introduces assertions to verify that sub-communicators
are created with the expected OMPI_COMM_DISJOINT* flags.

Signed-off-by: Wenduo Wang <[email protected]>
    @wenduwan
    wenduwan committed Dec 2, 2023
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