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// Copyright by Contributors
#include <xgboost/metric.h>
#include <string>
#include "../helpers.h"
namespace xgboost {
namespace metric {
inline void CheckDeterministicMetricMultiClass(StringView name, int32_t device) {
auto ctx = MakeCUDACtx(device);
std::unique_ptr<Metric> metric{Metric::Create(name.c_str(), &ctx)};
HostDeviceVector<float> predts;
auto p_fmat = EmptyDMatrix();
MetaInfo& info = p_fmat->Info();
auto &h_predts = predts.HostVector();
SimpleLCG lcg;
size_t n_samples = 2048, n_classes = 4;
info.labels.Reshape(n_samples);
auto &h_labels = info.labels.Data()->HostVector();
h_predts.resize(n_samples * n_classes);
{
SimpleRealUniformDistribution<float> dist{0.0f, static_cast<float>(n_classes)};
for (size_t i = 0; i < n_samples; ++i) {
h_labels[i] = dist(&lcg);
}
}
{
SimpleRealUniformDistribution<float> dist{0.0f, 1.0f};
for (size_t i = 0; i < n_samples * n_classes; ++i) {
h_predts[i] = dist(&lcg);
}
}
auto result = metric->Evaluate(predts, p_fmat);
for (size_t i = 0; i < 8; ++i) {
ASSERT_EQ(metric->Evaluate(predts, p_fmat), result);
}
}
inline void TestMultiClassError(DataSplitMode data_split_mode, DeviceOrd device) {
auto ctx = MakeCUDACtx(device.ordinal);
xgboost::Metric * metric = xgboost::Metric::Create("merror", &ctx);
metric->Configure({});
ASSERT_STREQ(metric->Name(), "merror");
EXPECT_ANY_THROW(GetMetricEval(metric, {0}, {0, 0}, {}, {}, data_split_mode));
EXPECT_NEAR(GetMetricEval(
metric, {1, 0, 0, 0, 1, 0, 0, 0, 1}, {0, 1, 2}, {}, {}, data_split_mode), 0, 1e-10);
EXPECT_NEAR(GetMetricEval(metric,
{0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f},
{0, 1, 2}, {}, {}, data_split_mode),
0.666f, 0.001f);
delete metric;
}
inline void VerifyMultiClassError(DataSplitMode data_split_mode, DeviceOrd device) {
TestMultiClassError(data_split_mode, device);
CheckDeterministicMetricMultiClass(StringView{"merror"}, device.ordinal);
}
inline void TestMultiClassLogLoss(DataSplitMode data_split_mode, DeviceOrd device) {
auto ctx = MakeCUDACtx(device.ordinal);
xgboost::Metric * metric = xgboost::Metric::Create("mlogloss", &ctx);
metric->Configure({});
ASSERT_STREQ(metric->Name(), "mlogloss");
EXPECT_ANY_THROW(GetMetricEval(metric, {0}, {0, 0}, {}, {}, data_split_mode));
EXPECT_NEAR(GetMetricEval(
metric, {1, 0, 0, 0, 1, 0, 0, 0, 1}, {0, 1, 2}, {}, {}, data_split_mode), 0, 1e-10);
EXPECT_NEAR(GetMetricEval(metric,
{0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f, 0.1f},
{0, 1, 2}, {}, {}, data_split_mode),
2.302f, 0.001f);
delete metric;
}
inline void VerifyMultiClassLogLoss(DataSplitMode data_split_mode, DeviceOrd device) {
TestMultiClassLogLoss(data_split_mode, device);
CheckDeterministicMetricMultiClass(StringView{"mlogloss"}, device.ordinal);
}
} // namespace metric
} // namespace xgboost
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