d581a3d0e7
* [UPDATE] Update rabit and threadlocal * minor fix to make build system happy * upgrade requirement to g++4.8 * upgrade dmlc-core * update travis
100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/*!
|
|
* Copyright (c) 2015 by Contributors
|
|
* \file sparse_page_raw_format.cc
|
|
* Raw binary format of sparse page.
|
|
*/
|
|
#include <xgboost/data.h>
|
|
#include <dmlc/registry.h>
|
|
#include "./sparse_batch_page.h"
|
|
|
|
namespace xgboost {
|
|
namespace data {
|
|
|
|
DMLC_REGISTRY_FILE_TAG(sparse_page_raw_format);
|
|
|
|
class SparsePageRawFormat : public SparsePage::Format {
|
|
public:
|
|
bool Read(SparsePage* page, dmlc::SeekStream* fi) override {
|
|
if (!fi->Read(&(page->offset))) return false;
|
|
CHECK_NE(page->offset.size(), 0U) << "Invalid SparsePage file";
|
|
page->data.resize(page->offset.back());
|
|
if (page->data.size() != 0) {
|
|
CHECK_EQ(fi->Read(dmlc::BeginPtr(page->data),
|
|
(page->data).size() * sizeof(SparseBatch::Entry)),
|
|
(page->data).size() * sizeof(SparseBatch::Entry))
|
|
<< "Invalid SparsePage file";
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool Read(SparsePage* page,
|
|
dmlc::SeekStream* fi,
|
|
const std::vector<bst_uint>& sorted_index_set) override {
|
|
if (!fi->Read(&disk_offset_)) return false;
|
|
// setup the offset
|
|
page->offset.clear();
|
|
page->offset.push_back(0);
|
|
for (size_t i = 0; i < sorted_index_set.size(); ++i) {
|
|
bst_uint fid = sorted_index_set[i];
|
|
CHECK_LT(fid + 1, disk_offset_.size());
|
|
size_t size = disk_offset_[fid + 1] - disk_offset_[fid];
|
|
page->offset.push_back(page->offset.back() + size);
|
|
}
|
|
page->data.resize(page->offset.back());
|
|
// read in the data
|
|
size_t begin = fi->Tell();
|
|
size_t curr_offset = 0;
|
|
for (size_t i = 0; i < sorted_index_set.size();) {
|
|
bst_uint fid = sorted_index_set[i];
|
|
if (disk_offset_[fid] != curr_offset) {
|
|
CHECK_GT(disk_offset_[fid], curr_offset);
|
|
fi->Seek(begin + disk_offset_[fid] * sizeof(SparseBatch::Entry));
|
|
curr_offset = disk_offset_[fid];
|
|
}
|
|
size_t j, size_to_read = 0;
|
|
for (j = i; j < sorted_index_set.size(); ++j) {
|
|
if (disk_offset_[sorted_index_set[j]] == disk_offset_[fid] + size_to_read) {
|
|
size_to_read += page->offset[j + 1] - page->offset[j];
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (size_to_read != 0) {
|
|
CHECK_EQ(fi->Read(dmlc::BeginPtr(page->data) + page->offset[i],
|
|
size_to_read * sizeof(SparseBatch::Entry)),
|
|
size_to_read * sizeof(SparseBatch::Entry))
|
|
<< "Invalid SparsePage file";
|
|
curr_offset += size_to_read;
|
|
}
|
|
i = j;
|
|
}
|
|
// seek to end of record
|
|
if (curr_offset != disk_offset_.back()) {
|
|
fi->Seek(begin + disk_offset_.back() * sizeof(SparseBatch::Entry));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void Write(const SparsePage& page, dmlc::Stream* fo) override {
|
|
CHECK(page.offset.size() != 0 && page.offset[0] == 0);
|
|
CHECK_EQ(page.offset.back(), page.data.size());
|
|
fo->Write(page.offset);
|
|
if (page.data.size() != 0) {
|
|
fo->Write(dmlc::BeginPtr(page.data), page.data.size() * sizeof(SparseBatch::Entry));
|
|
}
|
|
}
|
|
|
|
private:
|
|
/*! \brief external memory column offset */
|
|
std::vector<size_t> disk_offset_;
|
|
};
|
|
|
|
XGBOOST_REGISTER_SPARSE_PAGE_FORMAT(raw)
|
|
.describe("Raw binary data format.")
|
|
.set_body([]() {
|
|
return new SparsePageRawFormat();
|
|
});
|
|
} // namespace data
|
|
} // namespace xgboost
|