Jiaming Yuan 48dddfd635
Porting elementwise metrics to GPU. (#3952)
* Port elementwise metrics to GPU.

* All elementwise metrics are converted to static polymorphic.
* Create a reducer for metrics reduction.
* Remove const of Metric::Eval to accommodate CubMemory.
2018-12-01 18:46:45 +13:00
..
2018-06-07 10:25:58 +12:00
2018-08-14 17:58:11 +12:00