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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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13
tests/cpp/helpers.h
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@@ -14,6 +14,7 @@
#include <gtest/gtest.h>
#include <dmlc/filesystem.h>
#include <xgboost/base.h>
#include <xgboost/objective.h>
#include <xgboost/metric.h>
@@ -199,8 +200,9 @@ std::unique_ptr<DMatrix> CreateSparsePageDMatrix(
*
* \return The new dmatrix.
*/
std::unique_ptr<DMatrix> CreateSparsePageDMatrixWithRC(size_t n_rows, size_t n_cols,
size_t page_size, bool deterministic);
std::unique_ptr<DMatrix> CreateSparsePageDMatrixWithRC(
size_t n_rows, size_t n_cols, size_t page_size, bool deterministic,
const dmlc::TemporaryDirectory& tempdir = dmlc::TemporaryDirectory());
gbm::GBTreeModel CreateTestModel();
@@ -247,16 +249,15 @@ inline std::unique_ptr<EllpackPageImpl> BuildEllpackPage(
0.26f, 0.71f, 1.83f});
cmat.SetMins({0.1f, 0.2f, 0.3f, 0.1f, 0.2f, 0.3f, 0.2f, 0.2f});
auto is_dense = (*dmat)->Info().num_nonzero_ ==
(*dmat)->Info().num_row_ * (*dmat)->Info().num_col_;
size_t row_stride = 0;
const auto &offset_vec = batch.offset.ConstHostVector();
for (size_t i = 1; i < offset_vec.size(); ++i) {
row_stride = std::max(row_stride, offset_vec[i] - offset_vec[i-1]);
}
auto page = std::unique_ptr<EllpackPageImpl>(new EllpackPageImpl(dmat->get()));
page->InitCompressedData(0, cmat, row_stride, is_dense);
auto page = std::unique_ptr<EllpackPageImpl>(new EllpackPageImpl(dmat->get(), {0, 256, 0}));
page->InitInfo(0, (*dmat)->IsDense(), row_stride, cmat);
page->InitCompressedData(0, n_rows);
page->CreateHistIndices(0, batch, RowStateOnDevice(batch.Size(), batch.Size()));
delete dmat;