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Implement GK sketching on GPU. (#5846)

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* Implement GK sketching on GPU.
* Strong tests on quantile building.
* Handle sparse dataset by binary searching the column index.
* Hypothesis test on dask.
This commit is contained in:
Jiaming Yuan
2020-07-07 12:16:21 +08:00
committed by GitHub
parent ac3f0e78dc
commit 048d969be4
25 changed files with 2045 additions and 405 deletions
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4
tests/cpp/common/test_hist_util.h
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@@ -117,7 +117,7 @@ inline void TestBinDistribution(const HistogramCuts &cuts, int column_idx,
// First and last bin can have smaller
for (auto& kv : bin_weights) {
EXPECT_LE(std::abs(bin_weights[kv.first] - expected_bin_weight),
ASSERT_LE(std::abs(bin_weights[kv.first] - expected_bin_weight),
allowable_error);
}
}
@@ -189,7 +189,7 @@ inline void ValidateCuts(const HistogramCuts& cuts, DMatrix* dmat,
// Collect data into columns
std::vector<std::vector<float>> columns(dmat->Info().num_col_);
for (auto& batch : dmat->GetBatches<SparsePage>()) {
CHECK_GT(batch.Size(), 0);
ASSERT_GT(batch.Size(), 0);
for (auto i = 0ull; i < batch.Size(); i++) {
for (auto e : batch[i]) {
columns[e.index].push_back(e.fvalue);