xgboost/tests/cpp/common/test_transform_range.cu
Rong Ou 38ab79f889 Make HostDeviceVector single gpu only (#4773)
* Make HostDeviceVector single gpu only
2019-08-26 09:51:13 +12:00

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// This converts all tests from CPU to GPU.
#include "test_transform_range.cc"
#if defined(XGBOOST_USE_NCCL)
namespace xgboost {
namespace common {
TEST(Transform, MGPU_SpecifiedGpuId) {
if (AllVisibleGPUs() < 2) {
LOG(WARNING) << "Not testing in multi-gpu environment.";
return;
}
// Use 1 GPU, Numbering of GPU starts from 1
auto device = 1;
const size_t size {256};
std::vector<bst_float> h_in(size);
std::vector<bst_float> h_out(size);
InitializeRange(h_in.begin(), h_in.end());
std::vector<bst_float> h_sol(size);
InitializeRange(h_sol.begin(), h_sol.end());
const HostDeviceVector<bst_float> in_vec {h_in, device};
HostDeviceVector<bst_float> out_vec {h_out, device};
ASSERT_NO_THROW(
Transform<>::Init(TestTransformRange<bst_float>{}, Range{0, size}, device)
.Eval(&out_vec, &in_vec));
std::vector<bst_float> res = out_vec.HostVector();
ASSERT_TRUE(std::equal(h_sol.begin(), h_sol.end(), res.begin()));
}
} // namespace common
} // namespace xgboost
#endif