60 lines
1.6 KiB
Plaintext
60 lines
1.6 KiB
Plaintext
#include <gtest/gtest.h>
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#include "../../../../src/tree/gpu_hist/driver.cuh"
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namespace xgboost {
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namespace tree {
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TEST(GpuHist, DriverDepthWise) {
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Driver driver(TrainParam::kDepthWise);
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EXPECT_TRUE(driver.Pop().empty());
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DeviceSplitCandidate split;
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split.loss_chg = 1.0f;
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ExpandEntry root(0, 0, split);
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driver.Push({root});
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EXPECT_EQ(driver.Pop().front().nid, 0);
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driver.Push({ExpandEntry{1, 1, split}});
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driver.Push({ExpandEntry{2, 1, split}});
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driver.Push({ExpandEntry{3, 2, split}});
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// Should return entries from level 1
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auto res = driver.Pop();
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EXPECT_EQ(res.size(), 2);
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for (auto &e : res) {
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EXPECT_EQ(e.depth, 1);
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}
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res = driver.Pop();
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EXPECT_EQ(res[0].depth, 2);
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EXPECT_TRUE(driver.Pop().empty());
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}
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TEST(GpuHist, DriverLossGuided) {
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DeviceSplitCandidate high_gain;
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high_gain.loss_chg = 5.0f;
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DeviceSplitCandidate low_gain;
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low_gain.loss_chg = 1.0f;
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Driver driver(TrainParam::kLossGuide);
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EXPECT_TRUE(driver.Pop().empty());
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ExpandEntry root(0, 0, high_gain);
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driver.Push({root});
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EXPECT_EQ(driver.Pop().front().nid, 0);
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// Select high gain first
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driver.Push({ExpandEntry{1, 1, low_gain}});
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driver.Push({ExpandEntry{2, 2, high_gain}});
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auto res = driver.Pop();
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EXPECT_EQ(res.size(), 1);
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EXPECT_EQ(res[0].nid, 2);
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res = driver.Pop();
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EXPECT_EQ(res.size(), 1);
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EXPECT_EQ(res[0].nid, 1);
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// If equal gain, use nid
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driver.Push({ExpandEntry{2, 1, low_gain}});
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driver.Push({ExpandEntry{1, 1, low_gain}});
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res = driver.Pop();
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EXPECT_EQ(res[0].nid, 1);
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res = driver.Pop();
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EXPECT_EQ(res[0].nid, 2);
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}
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} // namespace tree
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} // namespace xgboost
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