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[coll] Avoid all-to-all connection. #10840

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[coll] Avoid all-to-all connection. #10840

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Commits on Sep 23, 2024

  1. [coll] Avoid all-to-all connection. 

    - Use a fixed tree topo for broadcast by always sending the data to the 0th node.

XGBoost always broadcast with 0th node as root anyway.

- Reduce the amount of connections.
    @trivialfis
    trivialfis committed Sep 23, 2024
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  2. R.

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    trivialfis committed Sep 23, 2024
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  3. Single worker.

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    trivialfis committed Sep 23, 2024
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  4. Cleanup.

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    trivialfis committed Sep 23, 2024
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  5. Log.

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    trivialfis committed Sep 23, 2024
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  6. Use the world size as backlog.

    @trivialfis
    trivialfis committed Sep 23, 2024
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  7. Don't be too small.

    @trivialfis
    trivialfis committed Sep 23, 2024
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  8. Ensure correct start sequence.

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    trivialfis committed Sep 23, 2024
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Commits on Sep 24, 2024

  1. checks.

    @trivialfis
    trivialfis committed Sep 24, 2024
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  2. lint.

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    trivialfis committed Sep 24, 2024
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