65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
#include <rabit/rabit.h>
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#include <algorithm>
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#include <string>
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#include <vector>
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#include "../helpers.h"
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namespace xgboost {
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namespace common {
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inline void InitRabitContext(std::string msg, int32_t n_workers) {
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auto port = std::getenv("DMLC_TRACKER_PORT");
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std::string port_str;
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if (port) {
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port_str = port;
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} else {
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LOG(WARNING) << msg << " as `DMLC_TRACKER_PORT` is not set up.";
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return;
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}
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auto uri = std::getenv("DMLC_TRACKER_URI");
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std::string uri_str;
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if (uri) {
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uri_str = uri;
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} else {
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LOG(WARNING) << msg << " as `DMLC_TRACKER_URI` is not set up.";
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return;
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}
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std::vector<std::string> envs{
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"DMLC_TRACKER_PORT=" + port_str,
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"DMLC_TRACKER_URI=" + uri_str,
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"DMLC_NUM_WORKER=" + std::to_string(n_workers)};
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char* c_envs[] {&(envs[0][0]), &(envs[1][0]), &(envs[2][0])};
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rabit::Init(3, c_envs);
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}
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template <typename Fn> void RunWithSeedsAndBins(size_t rows, Fn fn) {
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std::vector<int32_t> seeds(4);
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SimpleLCG lcg;
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SimpleRealUniformDistribution<float> dist(3, 1000);
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std::generate(seeds.begin(), seeds.end(), [&](){ return dist(&lcg); });
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std::vector<size_t> bins(8);
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for (size_t i = 0; i < bins.size() - 1; ++i) {
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bins[i] = i * 35 + 2;
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}
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bins.back() = rows + 160; // provide a bin number greater than rows.
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std::vector<MetaInfo> infos(2);
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auto& h_weights = infos.front().weights_.HostVector();
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h_weights.resize(rows);
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SimpleRealUniformDistribution<float> weight_dist(0, 10);
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std::generate(h_weights.begin(), h_weights.end(), [&]() { return weight_dist(&lcg); });
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for (auto seed : seeds) {
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for (auto n_bin : bins) {
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for (auto const& info : infos) {
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fn(seed, n_bin, info);
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}
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}
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}
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}
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} // namespace common
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} // namespace xgboost
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