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3 Commits

Author SHA1 Message Date
Rory Mitchell
40c6e2f0c8
Improved gpu_hist_experimental algorithm (#2866) 
- Implement colsampling, subsampling for gpu_hist_experimental

 - Optimised multi-GPU implementation for gpu_hist_experimental

 - Make nccl optional

 - Add Volta architecture flag

 - Optimise RegLossObj

 - Add timing utilities for debug verbose mode

 - Bump required cuda version to 8.0
 2017-11-11 13:58:40 +13:00
Rory Mitchell
13e7a2cff0 Various bug fixes (#2825) 
* Fatal error if GPU algorithm selected without GPU support compiled

* Resolve type conversion warnings

* Fix gpu unit test failure

* Fix compressed iterator edge case

* Fix python unit test failures due to flake8 update on pip
 2017-10-25 14:45:01 +13:00
Rory Mitchell
4cb2f7598b -Add experimental GPU algorithm for lossguided mode (#2755) 
-Improved GPU algorithm unit tests
-Removed some thrust code to improve compile times
 2017-10-01 00:18:35 +13:00