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Write ELLPACK pages to disk (#4879)

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* add ellpack source
* add batch param
* extract function to parse cache info
* construct ellpack info separately
* push batch to ellpack page
* write ellpack page.
* make sparse page source reusable
This commit is contained in:
Rong Ou
2019-10-22 20:44:32 -07:00
committed by Jiaming Yuan
parent 310fe60b35
commit 5b1715d97c
25 changed files with 935 additions and 408 deletions
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20
tests/cpp/data/test_ellpack_page.cu
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@@ -17,15 +17,13 @@ TEST(EllpackPage, EmptyDMatrix) {
constexpr int kNRows = 0, kNCols = 0, kMaxBin = 256, kGpuBatchNRows = 64;
constexpr float kSparsity = 0;
auto dmat = *CreateDMatrix(kNRows, kNCols, kSparsity);
auto& page = *dmat->GetBatches<EllpackPage>().begin();
auto& page = *dmat->GetBatches<EllpackPage>({0, kMaxBin, kGpuBatchNRows}).begin();
auto impl = page.Impl();
impl->Init(0, kMaxBin, kGpuBatchNRows);
ASSERT_EQ(impl->ellpack_matrix.feature_segments.size(), 1);
ASSERT_EQ(impl->ellpack_matrix.min_fvalue.size(), 0);
ASSERT_EQ(impl->ellpack_matrix.gidx_fvalue_map.size(), 0);
ASSERT_EQ(impl->ellpack_matrix.row_stride, 0);
ASSERT_EQ(impl->ellpack_matrix.null_gidx_value, 0);
ASSERT_EQ(impl->n_bins, 0);
ASSERT_EQ(impl->matrix.info.feature_segments.size(), 1);
ASSERT_EQ(impl->matrix.info.min_fvalue.size(), 0);
ASSERT_EQ(impl->matrix.info.gidx_fvalue_map.size(), 0);
ASSERT_EQ(impl->matrix.info.row_stride, 0);
ASSERT_EQ(impl->matrix.info.n_bins, 0);
ASSERT_EQ(impl->gidx_buffer.size(), 4);
}
@@ -37,7 +35,7 @@ TEST(EllpackPage, BuildGidxDense) {
dh::CopyDeviceSpanToVector(&h_gidx_buffer, page->gidx_buffer);
common::CompressedIterator<uint32_t> gidx(h_gidx_buffer.data(), 25);
ASSERT_EQ(page->ellpack_matrix.row_stride, kNCols);
ASSERT_EQ(page->matrix.info.row_stride, kNCols);
std::vector<uint32_t> solution = {
0, 3, 8, 9, 14, 17, 20, 21,
@@ -70,7 +68,7 @@ TEST(EllpackPage, BuildGidxSparse) {
dh::CopyDeviceSpanToVector(&h_gidx_buffer, page->gidx_buffer);
common::CompressedIterator<uint32_t> gidx(h_gidx_buffer.data(), 25);
ASSERT_LE(page->ellpack_matrix.row_stride, 3);
ASSERT_LE(page->matrix.info.row_stride, 3);
// row_stride = 3, 16 rows, 48 entries for ELLPack
std::vector<uint32_t> solution = {
@@ -78,7 +76,7 @@ TEST(EllpackPage, BuildGidxSparse) {
24, 24, 24, 24, 24, 5, 24, 24, 0, 16, 24, 15, 24, 24, 24, 24,
24, 7, 14, 16, 4, 24, 24, 24, 24, 24, 9, 24, 24, 1, 24, 24
};
for (size_t i = 0; i < kNRows * page->ellpack_matrix.row_stride; ++i) {
for (size_t i = 0; i < kNRows * page->matrix.info.row_stride; ++i) {
ASSERT_EQ(solution[i], gidx[i]);
}
}

26
tests/cpp/data/test_sparse_page_dmatrix.cu Normal file
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@@ -0,0 +1,26 @@
// Copyright by Contributors
#include <dmlc/filesystem.h>
#include "../helpers.h"
namespace xgboost {
TEST(GPUSparsePageDMatrix, EllpackPage) {
dmlc::TemporaryDirectory tempdir;
const std::string tmp_file = tempdir.path + "/simple.libsvm";
CreateSimpleTestData(tmp_file);
DMatrix* dmat = DMatrix::Load(tmp_file + "#" + tmp_file + ".cache", true, false);
// Loop over the batches and assert the data is as expected
for (const auto& batch : dmat->GetBatches<EllpackPage>({0, 256, 64})) {
EXPECT_EQ(batch.Size(), dmat->Info().num_row_);
}
EXPECT_TRUE(FileExists(tmp_file + ".cache"));
EXPECT_TRUE(FileExists(tmp_file + ".cache.row.page"));
EXPECT_TRUE(FileExists(tmp_file + ".cache.ellpack.page"));
delete dmat;
}
} // namespace xgboost