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Investigate accuracy difference for distributed CPU hist. #6022

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trivialfis opened this issue Aug 17, 2020 · 2 comments
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Investigate accuracy difference for distributed CPU hist. #6022

trivialfis opened this issue Aug 17, 2020 · 2 comments
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The difference can be reproduced with test_hist in dask tests. I think there are some heuristics on distributed CPU hist that differs from single node tree building. But the result should be close.
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#5977

@FelixYBW FelixYBW mentioned this issue Aug 21, 2020
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@trivialfis trivialfis self-assigned this Aug 26, 2020
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The difference mostly comes from sketching

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