Jiaming Yuan bc267dd729
Use ptr from mmap for GHistIndexMatrix and ColumnMatrix. (#9315)
* Use ptr from mmap for `GHistIndexMatrix` and `ColumnMatrix`.

- Define a resource for holding various types of memory pointers.
- Define ref vector for holding resources.
- Swap the underlying resources for GHist and ColumnM.
- Add documentation for current status.
- s390x support is removed. It should work if you can compile XGBoost, all the old workaround code does is to get GCC to compile.
2023-06-27 19:05:46 +08:00
..
2023-03-03 13:47:04 -08:00
2022-09-21 18:06:50 +08:00
2023-03-01 00:39:06 +08:00
2020-08-12 01:26:02 -07:00