Fix wrapping GPU ID and prevent data copying. (#5160)

* Removed some data copying. * Make sure gpu_id is valid before any configuration is carried out.
2019-12-27 16:51:08 +08:00
parent ee81ba8e1f
commit 61286c6e8f
7 changed files with 55 additions and 17 deletions
--- a/tests/cpp/helpers.cc
+++ b/tests/cpp/helpers.cc
@@ -46,7 +46,7 @@ void CheckObjFunctionImpl(std::unique_ptr<xgboost::ObjFunction> const& obj,
                          std::vector<xgboost::bst_float> preds,
                          std::vector<xgboost::bst_float> labels,
                          std::vector<xgboost::bst_float> weights,
-                          xgboost::MetaInfo info,
+                          xgboost::MetaInfo const& info,
                          std::vector<xgboost::bst_float> out_grad,
                          std::vector<xgboost::bst_float> out_hess) {
  xgboost::HostDeviceVector<xgboost::bst_float> in_preds(preds);