71 lines
1.9 KiB
Plaintext
71 lines
1.9 KiB
Plaintext
/**
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* Copyright 2021-2023 by XGBoost Contributors
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*/
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#include <gtest/gtest.h>
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#include <thrust/copy.h> // thrust::copy
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#include "../../../src/common/device_helpers.cuh"
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#include "../../../src/common/threading_utils.cuh"
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namespace xgboost {
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namespace common {
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TEST(SegmentedTrapezoidThreads, Basic) {
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size_t constexpr kElements = 24, kGroups = 3;
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dh::device_vector<size_t> offset_ptr(kGroups + 1, 0);
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offset_ptr[0] = 0;
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offset_ptr[1] = 8;
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offset_ptr[2] = 16;
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offset_ptr[kGroups] = kElements;
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size_t h = 1;
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dh::device_vector<size_t> thread_ptr(kGroups + 1, 0);
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size_t total = SegmentedTrapezoidThreads(dh::ToSpan(offset_ptr), dh::ToSpan(thread_ptr), h);
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ASSERT_EQ(total, kElements - kGroups);
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h = 2;
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SegmentedTrapezoidThreads(dh::ToSpan(offset_ptr), dh::ToSpan(thread_ptr), h);
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std::vector<size_t> h_thread_ptr(thread_ptr.size());
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thrust::copy(thread_ptr.cbegin(), thread_ptr.cend(), h_thread_ptr.begin());
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for (size_t i = 1; i < h_thread_ptr.size(); ++i) {
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ASSERT_EQ(h_thread_ptr[i] - h_thread_ptr[i - 1], 13);
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}
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h = 7;
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SegmentedTrapezoidThreads(dh::ToSpan(offset_ptr), dh::ToSpan(thread_ptr), h);
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thrust::copy(thread_ptr.cbegin(), thread_ptr.cend(), h_thread_ptr.begin());
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for (size_t i = 1; i < h_thread_ptr.size(); ++i) {
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ASSERT_EQ(h_thread_ptr[i] - h_thread_ptr[i - 1], 28);
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}
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}
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TEST(SegmentedTrapezoidThreads, Unravel) {
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size_t i = 0, j = 0;
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size_t constexpr kN = 8;
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UnravelTrapeziodIdx(6, kN, &i, &j);
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ASSERT_EQ(i, 0);
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ASSERT_EQ(j, 7);
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UnravelTrapeziodIdx(12, kN, &i, &j);
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ASSERT_EQ(i, 1);
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ASSERT_EQ(j, 7);
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UnravelTrapeziodIdx(15, kN, &i, &j);
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ASSERT_EQ(i, 2);
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ASSERT_EQ(j, 5);
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UnravelTrapeziodIdx(21, kN, &i, &j);
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ASSERT_EQ(i, 3);
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ASSERT_EQ(j, 7);
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UnravelTrapeziodIdx(25, kN, &i, &j);
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ASSERT_EQ(i, 5);
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ASSERT_EQ(j, 6);
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UnravelTrapeziodIdx(27, kN, &i, &j);
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ASSERT_EQ(i, 6);
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ASSERT_EQ(j, 7);
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}
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} // namespace common
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} // namespace xgboost
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