| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include "afanasyev_a_integ_rect_method/tbb/include/ops_tbb.hpp" | ||
| 2 | |||
| 3 | #include <tbb/blocked_range.h> | ||
| 4 | #include <tbb/parallel_reduce.h> | ||
| 5 | |||
| 6 | #include <array> | ||
| 7 | #include <cmath> | ||
| 8 | #include <cstdint> | ||
| 9 | #include <functional> | ||
| 10 | |||
| 11 | #include "afanasyev_a_integ_rect_method/common/include/common.hpp" | ||
| 12 | |||
| 13 | namespace afanasyev_a_integ_rect_method { | ||
| 14 | namespace { | ||
| 15 | |||
| 16 | double ExampleIntegrand(const std::array<double, 3> &x) { | ||
| 17 | double s = 0.0; | ||
| 18 |
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8640000 | for (double xi : x) { |
| 19 | 6480000 | s += xi * xi; | |
| 20 | } | ||
| 21 | 2160000 | return std::exp(-s); | |
| 22 | } | ||
| 23 | |||
| 24 | } // namespace | ||
| 25 | |||
| 26 | 12 | AfanasyevAIntegRectMethodTBB::AfanasyevAIntegRectMethodTBB(const InType &in) { | |
| 27 | SetTypeOfTask(GetStaticTypeOfTask()); | ||
| 28 | 12 | GetInput() = in; | |
| 29 | GetOutput() = 0.0; | ||
| 30 | 12 | } | |
| 31 | |||
| 32 | 12 | bool AfanasyevAIntegRectMethodTBB::ValidationImpl() { | |
| 33 | 12 | return (GetInput() > 0); | |
| 34 | } | ||
| 35 | |||
| 36 | 12 | bool AfanasyevAIntegRectMethodTBB::PreProcessingImpl() { | |
| 37 | 12 | return true; | |
| 38 | } | ||
| 39 | |||
| 40 | 12 | bool AfanasyevAIntegRectMethodTBB::RunImpl() { | |
| 41 | 12 | const int n = GetInput(); | |
| 42 |
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12 | if (n <= 0) { |
| 43 | return false; | ||
| 44 | } | ||
| 45 | |||
| 46 | const int k_dim = 3; | ||
| 47 | 12 | const double h = 1.0 / static_cast<double>(n); | |
| 48 | 12 | const int64_t total_points = static_cast<int64_t>(n) * n * n; | |
| 49 | |||
| 50 | 24 | const double sum = tbb::parallel_reduce(tbb::blocked_range<int64_t>(0, total_points), 0.0, | |
| 51 | 12 | [&](const tbb::blocked_range<int64_t> &range, double local_sum) { | |
| 52 | std::array<double, 3> x{}; | ||
| 53 | 4015 | const int64_t plane = static_cast<int64_t>(n) * n; | |
| 54 |
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2164015 | for (int64_t index = range.begin(); index != range.end(); ++index) { |
| 55 | 2160000 | const int i = static_cast<int>(index / plane); | |
| 56 | 2160000 | const int j = static_cast<int>((index / n) % n); | |
| 57 | 2160000 | const int k = static_cast<int>(index % n); | |
| 58 | |||
| 59 | 2160000 | x[0] = (static_cast<double>(i) + 0.5) * h; | |
| 60 | 2160000 | x[1] = (static_cast<double>(j) + 0.5) * h; | |
| 61 | 2160000 | x[2] = (static_cast<double>(k) + 0.5) * h; | |
| 62 | |||
| 63 | 2160000 | local_sum += ExampleIntegrand(x); | |
| 64 | } | ||
| 65 | 4015 | return local_sum; | |
| 66 | 12 | }, std::plus<>()); | |
| 67 | |||
| 68 | 12 | const double volume = std::pow(h, k_dim); | |
| 69 | 12 | GetOutput() = sum * volume; | |
| 70 | |||
| 71 | 12 | return true; | |
| 72 | } | ||
| 73 | |||
| 74 | 12 | bool AfanasyevAIntegRectMethodTBB::PostProcessingImpl() { | |
| 75 | 12 | return true; | |
| 76 | } | ||
| 77 | |||
| 78 | } // namespace afanasyev_a_integ_rect_method | ||
| 79 |