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test_linalg.cu
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test_linalg.cu
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/*!
* Copyright 2021 by XGBoost Contributors
*/
#include <gtest/gtest.h>
#include "../../../src/common/linalg_op.cuh"
#include "xgboost/generic_parameters.h"
#include "xgboost/linalg.h"
namespace xgboost {
namespace linalg {
namespace {
void TestElementWiseKernel() {
Tensor<float, 3> l{{2, 3, 4}, 0};
{
/**
* Non-contiguous
*/
// GPU view
auto t = l.View(0).Slice(linalg::All(), 1, linalg::All());
ASSERT_FALSE(t.CContiguous());
ElementWiseKernelDevice(t, [] __device__(size_t i, float) { return i; });
// CPU view
t = l.View(GenericParameter::kCpuId).Slice(linalg::All(), 1, linalg::All());
size_t k = 0;
for (size_t i = 0; i < l.Shape(0); ++i) {
for (size_t j = 0; j < l.Shape(2); ++j) {
ASSERT_EQ(k++, t(i, j));
}
}
t = l.View(0).Slice(linalg::All(), 1, linalg::All());
ElementWiseKernelDevice(t, [] __device__(size_t i, float v) {
SPAN_CHECK(v == i);
return v;
});
}
{
/**
* Contiguous
*/
auto t = l.View(0);
ElementWiseKernelDevice(t, [] __device__(size_t i, float) { return i; });
ASSERT_TRUE(t.CContiguous());
// CPU view
t = l.View(GenericParameter::kCpuId);
size_t ind = 0;
for (size_t i = 0; i < l.Shape(0); ++i) {
for (size_t j = 0; j < l.Shape(1); ++j) {
for (size_t k = 0; k < l.Shape(2); ++k) {
ASSERT_EQ(ind++, t(i, j, k));
}
}
}
}
}
void TestSlice() {
thrust::device_vector<double> data(2 * 3 * 4);
auto t = MakeTensorView(dh::ToSpan(data), {2, 3, 4}, 0);
dh::LaunchN(1, [=] __device__(size_t) {
auto s = t.Slice(linalg::All(), linalg::Range(0, 3), linalg::Range(0, 4));
auto all = t.Slice(linalg::All(), linalg::All(), linalg::All());
static_assert(decltype(s)::kDimension == 3, "");
for (size_t i = 0; i < s.Shape(0); ++i) {
for (size_t j = 0; j < s.Shape(1); ++j) {
for (size_t k = 0; k < s.Shape(2); ++k) {
SPAN_CHECK(s(i, j, k) == all(i, j, k));
}
}
}
});
}
} // anonymous namespace
TEST(Linalg, GPUElementWise) { TestElementWiseKernel(); }
TEST(Linalg, GPUTensorView) { TestSlice(); }
} // namespace linalg
} // namespace xgboost