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4 Commits

Author SHA1 Message Date
Rory Mitchell
5e582b0fa7
Combine thread launches into single launch per tree for gpu_hist (#4343) 
* Combine thread launches into single launch per tree for gpu_hist
algorithm.

* Address deprecation warning

* Add manual column sampler constructor

* Turn off omp dynamic to get a guaranteed number of threads

* Enable openmp in cuda code
 2019-04-29 09:58:34 +12:00
Rory Mitchell
00465d243d
Optimisations for gpu_hist. (#4248) 
* Optimisations for gpu_hist.

* Use streams to overlap operations.

* ColumnSampler now uses HostDeviceVector to prevent repeatedly copying feature vectors to the device.
 2019-03-20 13:30:06 +13:00
Andy Adinets
42bf90eb8f Column sampling at individual nodes (splits). (#3971) 
* Column sampling at individual nodes (splits).

* Documented colsample_bynode parameter.

- also updated documentation for colsample_by* parameters

* Updated documentation.

* GetFeatureSet() returns shared pointer to std::vector.

* Sync sampled columns across multiple processes.
 2018-12-14 22:37:35 +08:00
Rory Mitchell
78bea0d204
Add google test for a column sampling, restore metainfo tests (#3637) 
* Add google test for a column sampling, restore metainfo tests

* Update metainfo test for visual studio

* Fix multi-GPU bug introduced in #3635
 2018-08-28 16:10:26 +12:00