Пылаева Светлана. Технология SEQ-MPI. Максимальное значение элементов матрицы. Вариант 13.

tasks/pylaeva_s_max_elem_matrix/common/include/common.hpp

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+#pragma once
+
+#include <cstddef>
+#include <string>
+#include <tuple>
+#include <vector>
+
+#include "task/include/task.hpp"
+
+namespace pylaeva_s_max_elem_matrix {
+
+using InType = std::tuple<size_t, size_t, std::vector<int>>;
+using OutType = int;
+using TestType = std::string;
+using BaseTask = ppc::task::Task<InType, OutType>;
+
+}  // namespace pylaeva_s_max_elem_matrix

tasks/pylaeva_s_max_elem_matrix/data/matrix_11x11.txt

@@ -0,0 +1,2 @@
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tasks/pylaeva_s_max_elem_matrix/data/matrix_3x3.txt

@@ -0,0 +1,2 @@
+3 3 100
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tasks/pylaeva_s_max_elem_matrix/data/matrix_5x5.txt

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+5 5 500
+51 178 50 242 50 11 50 344 50 50 500 50 400 50 50 80 57 397 9 440 50 50 305 50 50 

tasks/pylaeva_s_max_elem_matrix/info.json

@@ -0,0 +1,9 @@
+{
+    "student": {
+        "first_name": "Светлана",
+        "last_name": "Пылаева",
+        "middle_name": "Алексеевна",
+        "group_number": "3823Б1ФИ3",
+        "task_number": "1"
+    }
+}

tasks/pylaeva_s_max_elem_matrix/mpi/include/ops_mpi.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "pylaeva_s_max_elem_matrix/common/include/common.hpp"
+#include "task/include/task.hpp"
+
+namespace pylaeva_s_max_elem_matrix {
+
+class PylaevaSMaxElemMatrixMPI : public BaseTask {
+ public:
+  static constexpr ppc::task::TypeOfTask GetStaticTypeOfTask() {
+    return ppc::task::TypeOfTask::kMPI;
+  }
+  explicit PylaevaSMaxElemMatrixMPI(const InType &in);
+
+ private:
+  bool ValidationImpl() override;
+  bool PreProcessingImpl() override;
+  bool RunImpl() override;
+  bool PostProcessingImpl() override;
+};
+
+}  // namespace pylaeva_s_max_elem_matrix

tasks/pylaeva_s_max_elem_matrix/mpi/src/ops_mpi.cpp

@@ -0,0 +1,86 @@
+#include "pylaeva_s_max_elem_matrix/mpi/include/ops_mpi.hpp"
+
+#include <mpi.h>
+
+#include <algorithm>  // для std::max
+#include <cstddef>    // для size_t
+#include <limits>     // для std::numeric_limits
+#include <vector>
+
+#include "pylaeva_s_max_elem_matrix/common/include/common.hpp"
+
+namespace pylaeva_s_max_elem_matrix {
+
+PylaevaSMaxElemMatrixMPI::PylaevaSMaxElemMatrixMPI(const InType &in) {
+  SetTypeOfTask(GetStaticTypeOfTask());
+  GetInput() = in;
+  GetOutput() = std::numeric_limits<int>::min();
+}
+
+bool PylaevaSMaxElemMatrixMPI::ValidationImpl() {
+  const auto rows = static_cast<size_t>(std::get<0>(GetInput()));
+  const auto columns = static_cast<size_t>(std::get<1>(GetInput()));
+  size_t matrix_size = rows * columns;
+
+  return (matrix_size == std::get<2>(GetInput()).size()) && (rows > 0) && (columns > 0);
+}
+
+bool PylaevaSMaxElemMatrixMPI::PreProcessingImpl() {
+  return true;
+}
+
+bool PylaevaSMaxElemMatrixMPI::RunImpl() {
+  int rank = 0;
+  int size = 0;
+  MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+  MPI_Comm_size(MPI_COMM_WORLD, &size);
+
+  size_t matrix_size = 0;
+  std::vector<int> matrix_data;
+
+  if (rank == 0) {
+    const auto matrix_rows = static_cast<size_t>(std::get<0>(GetInput()));
+    const auto matrix_columns = static_cast<size_t>(std::get<1>(GetInput()));
+    matrix_size = matrix_rows * matrix_columns;
+    matrix_data = std::get<2>(GetInput());
+  }
+
+  MPI_Bcast(&matrix_size, 1, MPI_INT, 0, MPI_COMM_WORLD);
+
+  std::vector<int> sendcounts(size, 0);
+  std::vector<int> displs(size, 0);
+
+  int local_size = static_cast<int>(matrix_size / size);
+  int remainder = static_cast<int>(matrix_size % size);
+
+  int offset = 0;
+  for (int i = 0; i < size; i++) {
+    sendcounts[i] = local_size + (i < remainder ? 1 : 0);
+    displs[i] = offset;
+    offset += sendcounts[i];
+  }
+
+  int local_elements = sendcounts[rank];
+  std::vector<int> local_data(local_elements);
+
+  MPI_Scatterv(rank == 0 ? matrix_data.data() : nullptr, sendcounts.data(), displs.data(), MPI_INT, local_data.data(),
+               local_elements, MPI_INT, 0, MPI_COMM_WORLD);
+
+  int local_max = std::numeric_limits<int>::min();
+  for (int i = 0; i < local_elements; i++) {
+    local_max = std::max(local_max, local_data[i]);
+  }
+
+  int global_max = std::numeric_limits<int>::min();
+  MPI_Allreduce(&local_max, &global_max, 1, MPI_INT, MPI_MAX, MPI_COMM_WORLD);
+
+  GetOutput() = global_max;
+
+  return true;
+}
+
+bool PylaevaSMaxElemMatrixMPI::PostProcessingImpl() {
+  return true;
+}
+
+}  // namespace pylaeva_s_max_elem_matrix