Jiaming Yuan
6762c45494
Small cleanup to gradient index and hist. ( #7668 )
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* Code comments.
* Const accessor to index.
* Remove some weird variables in the `Index` class.
* Simplify the `MemStackAllocator`.
2022-02-23 11:37:21 +08:00
Jiaming Yuan
2775c2a1ab
Prepare external memory support for hist. ( #7638 )
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This PR prepares the GHistIndexMatrix to host the column matrix which is used by the hist tree method by accepting sparse_threshold parameter.
Some cleanups are made to ensure the correct batch param is being passed into DMatrix along with some additional tests for correctness of SimpleDMatrix.
2022-02-10 16:58:02 +08:00
Jiaming Yuan
bf7bb575b4
Test CPU histogram with cat data. ( #7465 )
2021-11-27 00:43:28 +08:00
Jiaming Yuan
176110a22d
Support external memory in CPU histogram building. ( #7372 )
2021-11-23 01:13:33 +08:00
Jiaming Yuan
8e619010d0
Extract CPUExpandEntry and HistParam. ( #7321 )
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* Remove kRootNid.
* Check for empty hessian.
2021-10-17 14:22:25 +08:00
Jiaming Yuan
149f209af6
Extract histogram builder from CPU Hist. ( #7152 )
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* Extract the CPU histogram builder.
* Fix tests.
* Reduce number of histograms being built.
2021-08-09 21:15:21 +08:00
