83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
/*!
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* Copyright 2017-2024 by Contributors
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* \file hist_row_adder.h
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*/
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#ifndef PLUGIN_SYCL_TREE_HIST_ROW_ADDER_H_
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#define PLUGIN_SYCL_TREE_HIST_ROW_ADDER_H_
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#include <vector>
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#include <algorithm>
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namespace xgboost {
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namespace sycl {
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namespace tree {
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template <typename GradientSumT>
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class HistRowsAdder {
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public:
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virtual void AddHistRows(HistUpdater<GradientSumT>* builder,
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std::vector<int>* sync_ids, RegTree *p_tree) = 0;
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virtual ~HistRowsAdder() = default;
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};
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template <typename GradientSumT>
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class BatchHistRowsAdder: public HistRowsAdder<GradientSumT> {
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public:
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void AddHistRows(HistUpdater<GradientSumT>* builder,
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std::vector<int>* sync_ids, RegTree *p_tree) override {
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builder->builder_monitor_.Start("AddHistRows");
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for (auto const& entry : builder->nodes_for_explicit_hist_build_) {
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int nid = entry.nid;
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auto event = builder->hist_.AddHistRow(nid);
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}
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for (auto const& node : builder->nodes_for_subtraction_trick_) {
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auto event = builder->hist_.AddHistRow(node.nid);
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}
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builder->builder_monitor_.Stop("AddHistRows");
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}
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};
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template <typename GradientSumT>
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class DistributedHistRowsAdder: public HistRowsAdder<GradientSumT> {
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public:
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void AddHistRows(HistUpdater<GradientSumT>* builder,
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std::vector<int>* sync_ids, RegTree *p_tree) override {
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builder->builder_monitor_.Start("AddHistRows");
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const size_t explicit_size = builder->nodes_for_explicit_hist_build_.size();
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const size_t subtaction_size = builder->nodes_for_subtraction_trick_.size();
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std::vector<int> merged_node_ids(explicit_size + subtaction_size);
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for (size_t i = 0; i < explicit_size; ++i) {
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merged_node_ids[i] = builder->nodes_for_explicit_hist_build_[i].nid;
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}
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for (size_t i = 0; i < subtaction_size; ++i) {
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merged_node_ids[explicit_size + i] =
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builder->nodes_for_subtraction_trick_[i].nid;
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}
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std::sort(merged_node_ids.begin(), merged_node_ids.end());
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sync_ids->clear();
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for (auto const& nid : merged_node_ids) {
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if ((*p_tree)[nid].IsLeftChild()) {
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builder->hist_.AddHistRow(nid);
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builder->hist_local_worker_.AddHistRow(nid);
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sync_ids->push_back(nid);
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}
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}
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for (auto const& nid : merged_node_ids) {
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if (!((*p_tree)[nid].IsLeftChild())) {
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builder->hist_.AddHistRow(nid);
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builder->hist_local_worker_.AddHistRow(nid);
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}
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}
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builder->builder_monitor_.Stop("AddHistRows");
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}
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};
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} // namespace tree
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} // namespace sycl
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} // namespace xgboost
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#endif // PLUGIN_SYCL_TREE_HIST_ROW_ADDER_H_
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