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650f8c17e0e59e638b8b9b5c8b389e0d82db4f55
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4 Commits

Author SHA1 Message Date
Jiaming Yuan
c0afdb6786 Fix CPU bin compression with categorical data. (#8809) 
* Fix CPU bin compression with categorical data.

* The bug causes the maximum category to be lesser than 256 or the maximum number of bins when
the input data is dense.
 2023-02-16 04:20:34 +08:00
Jiaming Yuan
4d81c741e9 External memory support for hist (#7531) 
* Generate column matrix from gHistIndex.
* Avoid synchronization with the sparse page once the cache is written.
* Cleanups: Remove member variables/functions, change the update routine to look like approx and gpu_hist.
* Remove pruner.
 2022-03-22 00:13:20 +08:00
Jiaming Yuan
6762c45494 Small cleanup to gradient index and hist. (#7668) 
* 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
3515931305 Initial support for external memory in gradient index. (#7183) 
* Add hessian to batch param in preparation of new approx impl.
* Extract a push method for gradient index matrix.
* Use span instead of vector ref for hessian in sketching.
* Create a binary format for gradient index.
 2021-09-13 12:40:56 +08:00