51 lines
1.2 KiB
Plaintext
51 lines
1.2 KiB
Plaintext
#include <gtest/gtest.h>
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#include <xgboost/tree_updater.h>
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#include <vector>
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#include <string>
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#include <utility>
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#include "../helpers.h"
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namespace xgboost {
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namespace tree {
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TEST(GPUExact, Update) {
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using Arg = std::pair<std::string, std::string>;
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std::vector<Arg> args{
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{"n_gpus", "1"},
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{"gpu_id", "0"},
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{"max_depth", "1"}};
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auto* p_gpuexact_maker = TreeUpdater::Create("grow_gpu");
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p_gpuexact_maker->Init(args);
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size_t constexpr n_rows = 4;
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size_t constexpr n_cols = 8;
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bst_float constexpr sparsity = 0.0f;
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auto dmat = CreateDMatrix(n_rows, n_cols, sparsity, 3);
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std::vector<GradientPair> h_gpair(n_rows);
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for (size_t i = 0; i < n_rows; ++i) {
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h_gpair[i] = GradientPair(i % 2, 1);
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}
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HostDeviceVector<GradientPair> gpair (h_gpair);
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RegTree tree;
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p_gpuexact_maker->Update(&gpair, (*dmat).get(), {&tree});
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auto const& nodes = tree.GetNodes();
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ASSERT_EQ(nodes.size(), 3);
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float constexpr kRtEps = 1e-6;
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ASSERT_NEAR(tree.Stat(0).sum_hess, 4, kRtEps);
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ASSERT_NEAR(tree.Stat(1).sum_hess, 2, kRtEps);
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ASSERT_NEAR(tree.Stat(2).sum_hess, 2, kRtEps);
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ASSERT_NEAR(tree.Stat(0).loss_chg, 0.8f, kRtEps);
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delete dmat;
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delete p_gpuexact_maker;
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}
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} // namespace tree
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} // namespace xgboost |