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[Breaking] Accept multi-dim meta info. (#7405)

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This PR changes base_margin into a 3-dim array, with one of them being reserved for multi-target classification. Also, a breaking change is made for binary serialization due to extra dimension along with a fix for saving the feature weights. Lastly, it unifies the prediction initialization between CPU and GPU. After this PR, the meta info setter in Python will be based on array interface.
This commit is contained in:
Jiaming Yuan
2021-11-18 23:02:54 +08:00
committed by GitHub
parent 9fb4338964
commit d33854af1b
25 changed files with 545 additions and 256 deletions
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349
src/data/data.cc
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@@ -3,6 +3,7 @@
* \file data.cc
*/
#include <dmlc/registry.h>
#include <array>
#include <cstring>
#include "dmlc/io.h"
@@ -12,10 +13,13 @@
#include "xgboost/logging.h"
#include "xgboost/version_config.h"
#include "xgboost/learner.h"
#include "xgboost/string_view.h"
#include "sparse_page_writer.h"
#include "simple_dmatrix.h"
#include "../common/io.h"
#include "../common/linalg_op.h"
#include "../common/math.h"
#include "../common/version.h"
#include "../common/group_data.h"
@@ -66,10 +70,22 @@ void SaveVectorField(dmlc::Stream* strm, const std::string& name,
SaveVectorField(strm, name, type, shape, field.ConstHostVector());
}
template <typename T, int32_t D>
void SaveTensorField(dmlc::Stream* strm, const std::string& name, xgboost::DataType type,
const xgboost::linalg::Tensor<T, D>& field) {
strm->Write(name);
strm->Write(static_cast<uint8_t>(type));
strm->Write(false); // is_scalar=False
for (size_t i = 0; i < D; ++i) {
strm->Write(field.Shape(i));
}
strm->Write(field.Data()->HostVector());
}
template <typename T>
void LoadScalarField(dmlc::Stream* strm, const std::string& expected_name,
xgboost::DataType expected_type, T* field) {
const std::string invalid {"MetaInfo: Invalid format. "};
const std::string invalid{"MetaInfo: Invalid format for " + expected_name};
std::string name;
xgboost::DataType type;
bool is_scalar;
@@ -91,7 +107,7 @@ void LoadScalarField(dmlc::Stream* strm, const std::string& expected_name,
template <typename T>
void LoadVectorField(dmlc::Stream* strm, const std::string& expected_name,
xgboost::DataType expected_type, std::vector<T>* field) {
const std::string invalid {"MetaInfo: Invalid format. "};
const std::string invalid{"MetaInfo: Invalid format for " + expected_name};
std::string name;
xgboost::DataType type;
bool is_scalar;
@@ -124,6 +140,33 @@ void LoadVectorField(dmlc::Stream* strm, const std::string& expected_name,
LoadVectorField(strm, expected_name, expected_type, &field->HostVector());
}
template <typename T, int32_t D>
void LoadTensorField(dmlc::Stream* strm, std::string const& expected_name,
xgboost::DataType expected_type, xgboost::linalg::Tensor<T, D>* p_out) {
const std::string invalid{"MetaInfo: Invalid format for " + expected_name};
std::string name;
xgboost::DataType type;
bool is_scalar;
CHECK(strm->Read(&name)) << invalid;
CHECK_EQ(name, expected_name) << invalid << " Expected field: " << expected_name
<< ", got: " << name;
uint8_t type_val;
CHECK(strm->Read(&type_val)) << invalid;
type = static_cast<xgboost::DataType>(type_val);
CHECK(type == expected_type) << invalid
<< "Expected field of type: " << static_cast<int>(expected_type)
<< ", "
<< "got field type: " << static_cast<int>(type);
CHECK(strm->Read(&is_scalar)) << invalid;
CHECK(!is_scalar) << invalid << "Expected field " << expected_name
<< " to be a tensor; got a scalar";
std::array<size_t, D> shape;
for (size_t i = 0; i < D; ++i) {
CHECK(strm->Read(&(shape[i])));
}
auto& field = p_out->Data()->HostVector();
CHECK(strm->Read(&field)) << invalid;
}
} // anonymous namespace
namespace xgboost {
@@ -136,25 +179,26 @@ void MetaInfo::Clear() {
labels_.HostVector().clear();
group_ptr_.clear();
weights_.HostVector().clear();
base_margin_.HostVector().clear();
base_margin_ = decltype(base_margin_){};
}
/*
* Binary serialization format for MetaInfo:
*
* | name | type | is_scalar | num_row | num_col | value |
* |--------------------+----------+-----------+---------+---------+-------------------------|
* | num_row | kUInt64 | True | NA | NA | ${num_row_} |
* | num_col | kUInt64 | True | NA | NA | ${num_col_} |
* | num_nonzero | kUInt64 | True | NA | NA | ${num_nonzero_} |
* | labels | kFloat32 | False | ${size} | 1 | ${labels_} |
* | group_ptr | kUInt32 | False | ${size} | 1 | ${group_ptr_} |
* | weights | kFloat32 | False | ${size} | 1 | ${weights_} |
* | base_margin | kFloat32 | False | ${size} | 1 | ${base_margin_} |
* | labels_lower_bound | kFloat32 | False | ${size} | 1 | ${labels_lower_bound_} |
* | labels_upper_bound | kFloat32 | False | ${size} | 1 | ${labels_upper_bound_} |
* | feature_names | kStr | False | ${size} | 1 | ${feature_names} |
* | feature_types | kStr | False | ${size} | 1 | ${feature_types} |
* | name | type | is_scalar | num_row | num_col | dim3 | value |
* |--------------------+----------+-----------+-------------+-------------+-------------+------------------------|
* | num_row | kUInt64 | True | NA | NA | NA | ${num_row_} |
* | num_col | kUInt64 | True | NA | NA | NA | ${num_col_} |
* | num_nonzero | kUInt64 | True | NA | NA | NA | ${num_nonzero_} |
* | labels | kFloat32 | False | ${size} | 1 | NA | ${labels_} |
* | group_ptr | kUInt32 | False | ${size} | 1 | NA | ${group_ptr_} |
* | weights | kFloat32 | False | ${size} | 1 | NA | ${weights_} |
* | base_margin | kFloat32 | False | ${Shape(0)} | ${Shape(1)} | ${Shape(2)} | ${base_margin_} |
* | labels_lower_bound | kFloat32 | False | ${size} | 1 | NA | ${labels_lower_bound_} |
* | labels_upper_bound | kFloat32 | False | ${size} | 1 | NA | ${labels_upper_bound_} |
* | feature_names | kStr | False | ${size} | 1 | NA | ${feature_names} |
* | feature_types | kStr | False | ${size} | 1 | NA | ${feature_types} |
* | feature_types | kFloat32 | False | ${size} | 1 | NA | ${feature_weights} |
*
* Note that the scalar fields (is_scalar=True) will have num_row and num_col missing.
* Also notice the difference between the saved name and the name used in `SetInfo':
@@ -175,8 +219,7 @@ void MetaInfo::SaveBinary(dmlc::Stream *fo) const {
{group_ptr_.size(), 1}, group_ptr_); ++field_cnt;
SaveVectorField(fo, u8"weights", DataType::kFloat32,
{weights_.Size(), 1}, weights_); ++field_cnt;
SaveVectorField(fo, u8"base_margin", DataType::kFloat32,
{base_margin_.Size(), 1}, base_margin_); ++field_cnt;
SaveTensorField(fo, u8"base_margin", DataType::kFloat32, base_margin_); ++field_cnt;
SaveVectorField(fo, u8"labels_lower_bound", DataType::kFloat32,
{labels_lower_bound_.Size(), 1}, labels_lower_bound_); ++field_cnt;
SaveVectorField(fo, u8"labels_upper_bound", DataType::kFloat32,
@@ -186,6 +229,9 @@ void MetaInfo::SaveBinary(dmlc::Stream *fo) const {
{feature_names.size(), 1}, feature_names); ++field_cnt;
SaveVectorField(fo, u8"feature_types", DataType::kStr,
{feature_type_names.size(), 1}, feature_type_names); ++field_cnt;
SaveVectorField(fo, u8"feature_weights", DataType::kFloat32, {feature_weights.Size(), 1},
feature_weights);
++field_cnt;
CHECK_EQ(field_cnt, kNumField) << "Wrong number of fields";
}
@@ -214,10 +260,14 @@ void MetaInfo::LoadBinary(dmlc::Stream *fi) {
auto major = std::get<0>(version);
// MetaInfo is saved in `SparsePageSource'. So the version in MetaInfo represents the
// version of DMatrix.
CHECK_EQ(major, 1) << "Binary DMatrix generated by XGBoost: "
<< Version::String(version) << " is no longer supported. "
<< "Please process and save your data in current version: "
<< Version::String(Version::Self()) << " again.";
std::stringstream msg;
msg << "Binary DMatrix generated by XGBoost: " << Version::String(version)
<< " is no longer supported. "
<< "Please process and save your data in current version: "
<< Version::String(Version::Self()) << " again.";
CHECK_EQ(major, 1) << msg.str();
auto minor = std::get<1>(version);
CHECK_GE(minor, 6) << msg.str();
const uint64_t expected_num_field = kNumField;
uint64_t num_field { 0 };
@@ -244,12 +294,13 @@ void MetaInfo::LoadBinary(dmlc::Stream *fi) {
LoadVectorField(fi, u8"labels", DataType::kFloat32, &labels_);
LoadVectorField(fi, u8"group_ptr", DataType::kUInt32, &group_ptr_);
LoadVectorField(fi, u8"weights", DataType::kFloat32, &weights_);
LoadVectorField(fi, u8"base_margin", DataType::kFloat32, &base_margin_);
LoadTensorField(fi, u8"base_margin", DataType::kFloat32, &base_margin_);
LoadVectorField(fi, u8"labels_lower_bound", DataType::kFloat32, &labels_lower_bound_);
LoadVectorField(fi, u8"labels_upper_bound", DataType::kFloat32, &labels_upper_bound_);
LoadVectorField(fi, u8"feature_names", DataType::kStr, &feature_names);
LoadVectorField(fi, u8"feature_types", DataType::kStr, &feature_type_names);
LoadVectorField(fi, u8"feature_weights", DataType::kFloat32, &feature_weights);
LoadFeatureType(feature_type_names, &feature_types.HostVector());
}
@@ -292,10 +343,13 @@ MetaInfo MetaInfo::Slice(common::Span<int32_t const> ridxs) const {
if (this->base_margin_.Size() != this->num_row_) {
CHECK_EQ(this->base_margin_.Size() % this->num_row_, 0)
<< "Incorrect size of base margin vector.";
size_t stride = this->base_margin_.Size() / this->num_row_;
out.base_margin_.HostVector() = Gather(this->base_margin_.HostVector(), ridxs, stride);
auto margin = this->base_margin_.View(this->base_margin_.Data()->DeviceIdx());
out.base_margin_.Reshape(ridxs.size(), margin.Shape()[1], margin.Shape()[2]);
size_t stride = margin.Stride(0);
out.base_margin_.Data()->HostVector() =
Gather(this->base_margin_.Data()->HostVector(), ridxs, stride);
} else {
out.base_margin_.HostVector() = Gather(this->base_margin_.HostVector(), ridxs);
out.base_margin_.Data()->HostVector() = Gather(this->base_margin_.Data()->HostVector(), ridxs);
}
out.feature_weights.Resize(this->feature_weights.Size());
@@ -338,105 +392,179 @@ inline bool MetaTryLoadFloatInfo(const std::string& fname,
return true;
}
// macro to dispatch according to specified pointer types
#define DISPATCH_CONST_PTR(dtype, old_ptr, cast_ptr, proc) \
switch (dtype) { \
case xgboost::DataType::kFloat32: { \
auto cast_ptr = reinterpret_cast<const float*>(old_ptr); proc; break; \
} \
case xgboost::DataType::kDouble: { \
auto cast_ptr = reinterpret_cast<const double*>(old_ptr); proc; break; \
} \
case xgboost::DataType::kUInt32: { \
auto cast_ptr = reinterpret_cast<const uint32_t*>(old_ptr); proc; break; \
} \
case xgboost::DataType::kUInt64: { \
auto cast_ptr = reinterpret_cast<const uint64_t*>(old_ptr); proc; break; \
} \
default: LOG(FATAL) << "Unknown data type" << static_cast<uint8_t>(dtype); \
} \
namespace {
template <int32_t D, typename T>
void CopyTensorInfoImpl(Json arr_interface, linalg::Tensor<T, D>* p_out) {
ArrayInterface<D> array{arr_interface};
if (array.n == 0) {
return;
}
CHECK(array.valid.Size() == 0) << "Meta info like label or weight can not have missing value.";
if (array.is_contiguous && array.type == ToDType<T>::kType) {
// Handle contigious
p_out->ModifyInplace([&](HostDeviceVector<T>* data, common::Span<size_t, D> shape) {
// set shape
std::copy(array.shape, array.shape + D, shape.data());
// set data
data->Resize(array.n);
std::memcpy(data->HostPointer(), array.data, array.n * sizeof(T));
});
return;
}
p_out->Reshape(array.shape);
auto t = p_out->View(GenericParameter::kCpuId);
CHECK(t.Contiguous());
// FIXME(jiamingy): Remove the use of this default thread.
linalg::ElementWiseKernelHost(t, common::OmpGetNumThreads(0), [&](auto i, auto) {
return linalg::detail::Apply(TypedIndex<T, D>{array}, linalg::UnravelIndex<D>(i, t.Shape()));
});
}
} // namespace
void MetaInfo::SetInfo(const char* key, const void* dptr, DataType dtype, size_t num) {
if (!std::strcmp(key, "label")) {
auto& labels = labels_.HostVector();
labels.resize(num);
DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, labels.begin()));
auto valid = std::none_of(labels.cbegin(), labels.cend(), [](auto y) {
return std::isnan(y) || std::isinf(y);
});
CHECK(valid) << "Label contains NaN, infinity or a value too large.";
} else if (!std::strcmp(key, "weight")) {
auto& weights = weights_.HostVector();
weights.resize(num);
DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, weights.begin()));
auto valid = std::none_of(weights.cbegin(), weights.cend(), [](float w) {
return w < 0 || std::isinf(w) || std::isnan(w);
});
CHECK(valid) << "Weights must be positive values.";
} else if (!std::strcmp(key, "base_margin")) {
auto& base_margin = base_margin_.HostVector();
base_margin.resize(num);
DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, base_margin.begin()));
} else if (!std::strcmp(key, "group")) {
group_ptr_.clear(); group_ptr_.resize(num + 1, 0);
DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, group_ptr_.begin() + 1));
group_ptr_[0] = 0;
for (size_t i = 1; i < group_ptr_.size(); ++i) {
group_ptr_[i] = group_ptr_[i - 1] + group_ptr_[i];
void MetaInfo::SetInfo(StringView key, StringView interface_str) {
Json j_interface = Json::Load(interface_str);
bool is_cuda{false};
if (IsA<Array>(j_interface)) {
auto const& array = get<Array const>(j_interface);
CHECK_GE(array.size(), 0) << "Invalid " << key
<< ", must have at least 1 column even if it's empty.";
auto const& first = get<Object const>(array.front());
auto ptr = ArrayInterfaceHandler::GetPtrFromArrayData<void*>(first);
is_cuda = ArrayInterfaceHandler::IsCudaPtr(ptr);
} else {
auto const& first = get<Object const>(j_interface);
auto ptr = ArrayInterfaceHandler::GetPtrFromArrayData<void*>(first);
is_cuda = ArrayInterfaceHandler::IsCudaPtr(ptr);
}
if (is_cuda) {
this->SetInfoFromCUDA(key, j_interface);
} else {
this->SetInfoFromHost(key, j_interface);
}
}
void MetaInfo::SetInfoFromHost(StringView key, Json arr) {
// multi-dim float info
if (key == "base_margin") {
CopyTensorInfoImpl<3>(arr, &this->base_margin_);
// FIXME(jiamingy): Remove the deprecated API and let all language bindings aware of
// input shape. This issue is CPU only since CUDA uses array interface from day 1.
//
// Python binding always understand the shape, so this condition should not occur for
// it.
if (this->num_row_ != 0 && this->base_margin_.Shape(0) != this->num_row_) {
// API functions that don't use array interface don't understand shape.
CHECK(this->base_margin_.Size() % this->num_row_ == 0) << "Incorrect size for base margin.";
size_t n_groups = this->base_margin_.Size() / this->num_row_;
this->base_margin_.Reshape(this->num_row_, n_groups);
}
return;
}
// uint info
if (key == "group") {
linalg::Tensor<bst_group_t, 1> t;
CopyTensorInfoImpl(arr, &t);
auto const& h_groups = t.Data()->HostVector();
group_ptr_.clear();
group_ptr_.resize(h_groups.size() + 1, 0);
group_ptr_[0] = 0;
std::partial_sum(h_groups.cbegin(), h_groups.cend(), group_ptr_.begin() + 1);
data::ValidateQueryGroup(group_ptr_);
} else if (!std::strcmp(key, "qid")) {
std::vector<uint32_t> query_ids(num, 0);
DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, query_ids.begin()));
return;
} else if (key == "qid") {
linalg::Tensor<bst_group_t, 1> t;
CopyTensorInfoImpl(arr, &t);
bool non_dec = true;
auto const& query_ids = t.Data()->HostVector();
for (size_t i = 1; i < query_ids.size(); ++i) {
if (query_ids[i] < query_ids[i-1]) {
if (query_ids[i] < query_ids[i - 1]) {
non_dec = false;
break;
}
}
CHECK(non_dec) << "`qid` must be sorted in non-decreasing order along with data.";
group_ptr_.clear(); group_ptr_.push_back(0);
group_ptr_.clear();
group_ptr_.push_back(0);
for (size_t i = 1; i < query_ids.size(); ++i) {
if (query_ids[i] != query_ids[i-1]) {
if (query_ids[i] != query_ids[i - 1]) {
group_ptr_.push_back(i);
}
}
if (group_ptr_.back() != query_ids.size()) {
group_ptr_.push_back(query_ids.size());
}
} else if (!std::strcmp(key, "label_lower_bound")) {
auto& labels = labels_lower_bound_.HostVector();
labels.resize(num);
DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, labels.begin()));
} else if (!std::strcmp(key, "label_upper_bound")) {
auto& labels = labels_upper_bound_.HostVector();
labels.resize(num);
DISPATCH_CONST_PTR(dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, labels.begin()));
} else if (!std::strcmp(key, "feature_weights")) {
auto &h_feature_weights = feature_weights.HostVector();
h_feature_weights.resize(num);
DISPATCH_CONST_PTR(
dtype, dptr, cast_dptr,
std::copy(cast_dptr, cast_dptr + num, h_feature_weights.begin()));
data::ValidateQueryGroup(group_ptr_);
return;
}
// float info
linalg::Tensor<float, 1> t;
CopyTensorInfoImpl<1>(arr, &t);
if (key == "label") {
this->labels_ = std::move(*t.Data());
auto const& h_labels = labels_.ConstHostVector();
auto valid = std::none_of(h_labels.cbegin(), h_labels.cend(), data::LabelsCheck{});
CHECK(valid) << "Label contains NaN, infinity or a value too large.";
} else if (key == "weight") {
this->weights_ = std::move(*t.Data());
auto const& h_weights = this->weights_.ConstHostVector();
auto valid = std::none_of(h_weights.cbegin(), h_weights.cend(),
[](float w) { return w < 0 || std::isinf(w) || std::isnan(w); });
CHECK(valid) << "Weights must be positive values.";
} else if (key == "label_lower_bound") {
this->labels_lower_bound_ = std::move(*t.Data());
} else if (key == "label_upper_bound") {
this->labels_upper_bound_ = std::move(*t.Data());
} else if (key == "feature_weights") {
this->feature_weights = std::move(*t.Data());
auto const& h_feature_weights = feature_weights.ConstHostVector();
bool valid =
std::none_of(h_feature_weights.cbegin(), h_feature_weights.cend(),
[](float w) { return w < 0; });
std::none_of(h_feature_weights.cbegin(), h_feature_weights.cend(), data::WeightsCheck{});
CHECK(valid) << "Feature weight must be greater than 0.";
} else {
LOG(FATAL) << "Unknown key for MetaInfo: " << key;
}
}
void MetaInfo::GetInfo(char const *key, bst_ulong *out_len, DataType dtype,
const void **out_dptr) const {
void MetaInfo::SetInfo(const char* key, const void* dptr, DataType dtype, size_t num) {
auto proc = [&](auto cast_d_ptr) {
using T = std::remove_pointer_t<decltype(cast_d_ptr)>;
auto t =
linalg::TensorView<T, 1>(common::Span<T>{cast_d_ptr, num}, {num}, GenericParameter::kCpuId);
CHECK(t.Contiguous());
Json interface { t.ArrayInterface() };
assert(ArrayInterface<1>{interface}.is_contiguous);
return interface;
};
// Legacy code using XGBoost dtype, which is a small subset of array interface types.
switch (dtype) {
case xgboost::DataType::kFloat32: {
auto cast_ptr = reinterpret_cast<const float*>(dptr);
this->SetInfoFromHost(key, proc(cast_ptr));
break;
}
case xgboost::DataType::kDouble: {
auto cast_ptr = reinterpret_cast<const double*>(dptr);
this->SetInfoFromHost(key, proc(cast_ptr));
break;
}
case xgboost::DataType::kUInt32: {
auto cast_ptr = reinterpret_cast<const uint32_t*>(dptr);
this->SetInfoFromHost(key, proc(cast_ptr));
break;
}
case xgboost::DataType::kUInt64: {
auto cast_ptr = reinterpret_cast<const uint64_t*>(dptr);
this->SetInfoFromHost(key, proc(cast_ptr));
break;
}
default:
LOG(FATAL) << "Unknown data type" << static_cast<uint8_t>(dtype);
}
}
void MetaInfo::GetInfo(char const* key, bst_ulong* out_len, DataType dtype,
const void** out_dptr) const {
if (dtype == DataType::kFloat32) {
const std::vector<bst_float>* vec = nullptr;
if (!std::strcmp(key, "label")) {
@@ -444,7 +572,7 @@ void MetaInfo::GetInfo(char const *key, bst_ulong *out_len, DataType dtype,
} else if (!std::strcmp(key, "weight")) {
vec = &this->weights_.HostVector();
} else if (!std::strcmp(key, "base_margin")) {
vec = &this->base_margin_.HostVector();
vec = &this->base_margin_.Data()->HostVector();
} else if (!std::strcmp(key, "label_lower_bound")) {
vec = &this->labels_lower_bound_.HostVector();
} else if (!std::strcmp(key, "label_upper_bound")) {
@@ -533,8 +661,7 @@ void MetaInfo::Extend(MetaInfo const& that, bool accumulate_rows, bool check_col
this->labels_upper_bound_.SetDevice(that.labels_upper_bound_.DeviceIdx());
this->labels_upper_bound_.Extend(that.labels_upper_bound_);
this->base_margin_.SetDevice(that.base_margin_.DeviceIdx());
this->base_margin_.Extend(that.base_margin_);
linalg::Stack(&this->base_margin_, that.base_margin_);
if (this->group_ptr_.size() == 0) {
this->group_ptr_ = that.group_ptr_;
@@ -617,14 +744,12 @@ void MetaInfo::Validate(int32_t device) const {
if (base_margin_.Size() != 0) {
CHECK_EQ(base_margin_.Size() % num_row_, 0)
<< "Size of base margin must be a multiple of number of rows.";
check_device(base_margin_);
check_device(*base_margin_.Data());
}
}
#if !defined(XGBOOST_USE_CUDA)
void MetaInfo::SetInfo(StringView key, std::string const& interface_str) {
common::AssertGPUSupport();
}
void MetaInfo::SetInfoFromCUDA(StringView key, Json arr) { common::AssertGPUSupport(); }
#endif // !defined(XGBOOST_USE_CUDA)
using DMatrixThreadLocal =
@@ -778,10 +903,10 @@ DMatrix* DMatrix::Load(const std::string& uri,
LOG(CONSOLE) << info.group_ptr_.size() - 1
<< " groups are loaded from " << fname << ".group";
}
if (MetaTryLoadFloatInfo
(fname + ".base_margin", &info.base_margin_.HostVector()) && !silent) {
LOG(CONSOLE) << info.base_margin_.Size()
<< " base_margin are loaded from " << fname << ".base_margin";
if (MetaTryLoadFloatInfo(fname + ".base_margin", &info.base_margin_.Data()->HostVector()) &&
!silent) {
LOG(CONSOLE) << info.base_margin_.Size() << " base_margin are loaded from " << fname
<< ".base_margin";
}
if (MetaTryLoadFloatInfo
(fname + ".weight", &info.weights_.HostVector()) && !silent) {