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Fix metric serialization. (#9405)

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This commit is contained in:
Jiaming Yuan 2023-07-22 08:39:21 +08:00 committed by GitHub
parent dbd5309b55
commit 0de7c47495
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2 changed files with 32 additions and 4 deletions
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8
src/learner.cc
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@ -583,8 +583,9 @@ class LearnerConfiguration : public Learner {
auto& objective_fn = learner_parameters["objective"];
obj_->SaveConfig(&objective_fn);
std::vector<Json> metrics(metrics_.size(), Json{Object{}});
std::vector<Json> metrics(metrics_.size());
for (size_t i = 0; i < metrics_.size(); ++i) {
metrics[i] = Object{};
metrics_[i]->SaveConfig(&metrics[i]);
}
learner_parameters["metrics"] = Array(std::move(metrics));
@ -807,14 +808,13 @@ class LearnerConfiguration : public Learner {
void ConfigureMetrics(Args const& args) {
for (auto const& name : metric_names_) {
auto DupCheck = [&name](std::unique_ptr<Metric> const& m) {
return m->Name() != name;
};
auto DupCheck = [&name](std::unique_ptr<Metric> const& m) { return m->Name() != name; };
if (std::all_of(metrics_.begin(), metrics_.end(), DupCheck)) {
metrics_.emplace_back(std::unique_ptr<Metric>(Metric::Create(name, &ctx_)));
mparam_.contain_eval_metrics = 1;
}
}
for (auto& p_metric : metrics_) {
p_metric->Configure(args);
}

28
tests/cpp/test_learner.cc
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@ -215,6 +215,34 @@ TEST(Learner, JsonModelIO) {
}
}
TEST(Learner, ConfigIO) {
bst_row_t n_samples = 128;
bst_feature_t n_features = 12;
std::shared_ptr<DMatrix> p_fmat{
RandomDataGenerator{n_samples, n_features, 0}.GenerateDMatrix(true, false, 2)};
auto serialised_model_tmp = std::string{};
std::string eval_res_0;
std::string eval_res_1;
{
std::unique_ptr<Learner> learner{Learner::Create({p_fmat})};
learner->SetParams(Args{{"eval_metric", "ndcg"}, {"eval_metric", "map"}});
learner->Configure();
learner->UpdateOneIter(0, p_fmat);
eval_res_0 = learner->EvalOneIter(0, {p_fmat}, {"Train"});
common::MemoryBufferStream fo(&serialised_model_tmp);
learner->Save(&fo);
}
{
common::MemoryBufferStream fi(&serialised_model_tmp);
std::unique_ptr<Learner> learner{Learner::Create({p_fmat})};
learner->Load(&fi);
eval_res_1 = learner->EvalOneIter(0, {p_fmat}, {"Train"});
}
ASSERT_EQ(eval_res_0, eval_res_1);
}
// Crashes the test runner if there are race condiditions.
//
// Build with additional cmake flags to enable thread sanitizer