18211469908

Committed 02 Oct 2025 06:19PM UTC coverage: 75.017% (-0.004%) from 75.021%

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Merge pull request #787 from andrsd/n-grp-type

Number of groups is stored as `size_t`

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/modules/linear_boltzmann_solvers/lbs_problem/lbs_problem.h

// SPDX-FileCopyrightText: 2024 The OpenSn Authors <https://open-sn.github.io/opensn/>
// SPDX-License-Identifier: MIT

#pragma once

#include "modules/problem.h"
#include "modules/linear_boltzmann_solvers/discrete_ordinates_problem/sweep/sweep.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/groupset/lbs_groupset.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/point_source/point_source.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/volumetric_source/volumetric_source.h"
#include "modules/linear_boltzmann_solvers/lbs_problem/lbs_structs.h"
#include "framework/math/spatial_discretization/spatial_discretization.h"
#include "framework/mesh/mesh_continuum/mesh_continuum.h"
#include "framework/math/linear_solver/linear_solver.h"
#include "framework/math/spatial_discretization/finite_element/unit_cell_matrices.h"
#include <petscksp.h>
#include <any>
#include <chrono>

namespace opensn
{

class MPICommunicatorSet;
class GridFaceHistogram;
class TimeIntegration;
class AGSLinearSolver;
class WGSLinearSolver;
struct WGSContext;

/// Base class for all Linear Boltzmann Solvers.
class LBSProblem : public Problem
{
public:
  explicit LBSProblem(const std::string& name, std::shared_ptr<MeshContinuum> grid);

  /// Input parameters based construction.
  explicit LBSProblem(const InputParameters& params);

  LBSProblem(const LBSProblem&) = delete;

  LBSProblem& operator=(const LBSProblem&) = delete;

  ~LBSProblem() override;

  /// Returns a reference to the solver options.
  LBSOptions& GetOptions();

  /// Returns a constant reference to the solver options.
  const LBSOptions& GetOptions() const;

  static InputParameters GetOptionsBlock();

  static InputParameters GetBoundaryOptionsBlock();

  static InputParameters GetXSMapEntryBlock();

  void SetOptions(const InputParameters& input);

  void SetBoundaryOptions(const InputParameters& params);

  /// Returns the number of moments for the solver. This will only be non-zero after initialization.
  size_t GetNumMoments() const;

  /// Returns the number of groups for the solver. This will only be non-zero after initialization.
  size_t GetNumGroups() const;

  /// Returns the scattering order for the solver. This will only be non-zero after initialization.
  unsigned int GetScatteringOrder() const;

  /**
   * Returns the number of precursors for the solver. This will only be non-zero after
   * initialization.
   */
  size_t GetNumPrecursors() const;

  /**
   * Returns the maximum number of precursors defined on any material. This will only be non-zero
   * after initialization.
   */
  size_t GetMaxPrecursorsPerMaterial() const;

  /**
   * Adds a group to the list of groups. If group id < 0, the id will be logically derived from the
   * list size. If >= 0 the id will be set to the id specified.
   */
  void AddGroup(int id);

  const std::vector<LBSGroup>& GetGroups() const;

  /**
   * Adds a groupset to the list of groupsets. The groupset id will be logically derived from the
   * list size.
   */
  void AddGroupset();

  std::vector<LBSGroupset>& GetGroupsets();

  const std::vector<LBSGroupset>& GetGroupsets() const;

  /// Adds a point source to the solver.
  void AddPointSource(std::shared_ptr<PointSource> point_source);

  /// Clears all the point sources from the solver.
  void ClearPointSources();

  /// Constant accessor to the list of point sources.
  const std::vector<std::shared_ptr<PointSource>>& GetPointSources() const;

  /// Adds a volumetric source to the solver.
  void AddVolumetricSource(std::shared_ptr<VolumetricSource> volumetric_source);

  /// Clears all the volumetric sources from the solver.
  void ClearVolumetricSources();

  /// Constant accessor to the list of volumetric sources.
  const std::vector<std::shared_ptr<VolumetricSource>>& GetVolumetricSources() const;

  /// Clears all the boundary conditions from the solver.
  void ClearBoundaries();

  size_t& GetLastRestartTime();

  /// Returns a reference to the map of material ids to XSs.
  const std::map<int, std::shared_ptr<MultiGroupXS>>& GetMatID2XSMap() const;

  /// Obtains a reference to the grid.
  std::shared_ptr<MeshContinuum> GetGrid() const;

  /// Get pointer to carriers.
  void* GetCarrier(std::uint32_t idx) { return carriers_.at(idx); }

  /// Get pointer to pinners.
  void* GetPinner(std::uint32_t idx) { return pinners_.at(idx); }

  /// Obtains a reference to the spatial discretization.
  const SpatialDiscretization& GetSpatialDiscretization() const;

  /// Returns read-only access to the unit cell matrices.
  const std::vector<UnitCellMatrices>& GetUnitCellMatrices() const;

  /// Returns read-only access to the unit ghost cell matrices.
  const std::map<uint64_t, UnitCellMatrices>& GetUnitGhostCellMatrices() const;

  /// Returns a reference to the list of local cell transport views.
  const std::vector<CellLBSView>& GetCellTransportViews() const;

  /// Read/Write access to the boundary preferences.
  std::map<uint64_t, BoundaryPreference>& GetBoundaryPreferences();

  /// Obtains a reference to the unknown manager for flux-moments.
  const UnknownManager& GetUnknownManager() const;

  /// Returns the local node count for the flux-moments data structures.
  size_t GetLocalNodeCount() const;

  /// Returns the global node count for the flux-moments data structures.
  size_t GetGlobalNodeCount() const;

  /// Read/write access to source moments vector.
  std::vector<double>& GetQMomentsLocal();

  /// Read access to source moments vector.
  const std::vector<double>& GetQMomentsLocal() const;

  /// Read/write access to exterior src moments vector.
  std::vector<double>& GetExtSrcMomentsLocal();

  /// Read access to exterior src moments vector.
  const std::vector<double>& GetExtSrcMomentsLocal() const;

  /// Read/write access to last updated flux vector.
  std::vector<double>& GetPhiOldLocal();

  /// Read access to last updated flux vector.
  const std::vector<double>& GetPhiOldLocal() const;

  /// Read/write access to newest updated flux vector.
  std::vector<double>& GetPhiNewLocal();

  /// Read access to newest updated flux vector.
  const std::vector<double>& GetPhiNewLocal() const;

  /// Read/write access to newest updated precursors vector.
  std::vector<double>& GetPrecursorsNewLocal();

  /// Read access to newest updated precursors vector.
  const std::vector<double>& GetPrecursorsNewLocal() const;

  /// Read/write access to the cell-wise densities.
  std::vector<double>& GetDensitiesLocal();

  /// Read access to the cell-wise densities.
  const std::vector<double>& GetDensitiesLocal() const;

  SetSourceFunction GetActiveSetSourceFunction() const;

  std::shared_ptr<AGSLinearSolver> GetAGSSolver();

  std::vector<std::shared_ptr<LinearSolver>>& GetWGSSolvers();

  WGSContext& GetWGSContext(int groupset_id);

  /**
   * Gets the local and global number of iterative unknowns. This normally is only the flux moments,
   * however, the sweep based solvers might include delayed angular fluxes in this number.
   */
  virtual std::pair<size_t, size_t> GetNumPhiIterativeUnknowns();

  /// Gets the local handle of a flux-moment based field function.
  size_t MapPhiFieldFunction(size_t g, size_t m) const;

  /// Returns the power generation field function, if enabled.
  std::shared_ptr<FieldFunctionGridBased> GetPowerFieldFunction() const;

  void Initialize() override;

  /// Initializes default materials and physics materials.
  void InitializeMaterials();

  bool TriggerRestartDump() const
  {
    if (options_.write_restart_time_interval <= std::chrono::seconds(0))
      return false;

    auto elapsed = std::chrono::system_clock::now() - options_.last_restart_write_time;
    return elapsed >= options_.write_restart_time_interval;
  }

  void UpdateRestartWriteTime()
  {
    options_.last_restart_write_time = std::chrono::system_clock::now();
  }

  /// Makes a source-moments vector from scattering and fission based on the latest phi-solution.
  std::vector<double> MakeSourceMomentsFromPhi();

  /// Copy relevant section of phi_old to the field functions.
  void UpdateFieldFunctions();

  /// Sets the internal phi vector to the value in the associated field function.
  void SetPhiFromFieldFunctions(PhiSTLOption which_phi,
                                const std::vector<size_t>& m_indices,
                                const std::vector<size_t>& g_indices);

  /**
   * A method for post-processing an adjoint solution.
   *
   * @note This does nothing for diffusion-based solvers.
   */
  virtual void ReorientAdjointSolution() {};

protected:
  /// Performs general input checks before initialization continues.
  virtual void PerformInputChecks();

  /// Prints header information of simulation.
  void PrintSimHeader();

  virtual void InitializeSpatialDiscretization();

  void ComputeUnitIntegrals();

  /// Initializes common groupset items.
  void InitializeGroupsets();

  /// Computes the number of moments for the given mesher types
  void ValidateAndComputeScatteringMoments();

  /// Initializes parallel arrays.
  virtual void InitializeParrays();

  void InitializeFieldFunctions();

  /// Initializes boundaries.
  virtual void InitializeBoundaries() {}

  virtual void InitializeSolverSchemes();

  virtual void InitializeWGSSolvers() {};

  /// Initializes data carriers to GPUs and memory pinner.
  void InitializeGPUExtras();

  /// Reset data carriers to null and unpin memory.
  void ResetGPUCarriers();

  virtual void ZeroSolutions() = 0;

  LBSOptions options_;
  size_t num_moments_ = 0;
  size_t num_groups_ = 0;
  unsigned int scattering_order_ = 0;
  size_t num_precursors_ = 0;
  size_t max_precursors_per_material_ = 0;

  std::vector<LBSGroup> groups_;
  std::vector<LBSGroupset> groupsets_;

  std::map<int, std::shared_ptr<MultiGroupXS>> block_id_to_xs_map_;

  std::vector<std::shared_ptr<PointSource>> point_sources_;
  std::vector<std::shared_ptr<VolumetricSource>> volumetric_sources_;

  std::shared_ptr<MeshContinuum> grid_;
  std::shared_ptr<SpatialDiscretization> discretization_ = nullptr;

  std::vector<CellFaceNodalMapping> grid_nodal_mappings_;
  std::shared_ptr<MPICommunicatorSet> grid_local_comm_set_ = nullptr;

  std::vector<UnitCellMatrices> unit_cell_matrices_;
  std::map<uint64_t, UnitCellMatrices> unit_ghost_cell_matrices_;
  std::vector<CellLBSView> cell_transport_views_;

  std::map<uint64_t, BoundaryPreference> boundary_preferences_;

  UnknownManager flux_moments_uk_man_;

  size_t max_cell_dof_count_ = 0;
  uint64_t local_node_count_ = 0;
  uint64_t global_node_count_ = 0;

  std::vector<double> q_moments_local_, ext_src_moments_local_;
  std::vector<double> phi_new_local_, phi_old_local_;
  std::vector<double> precursor_new_local_;
  std::vector<double> densities_local_;

  SetSourceFunction active_set_source_function_;

  std::shared_ptr<AGSLinearSolver> ags_solver_;
  std::vector<std::shared_ptr<LinearSolver>> wgs_solvers_;

  std::map<std::pair<size_t, size_t>, size_t> phi_field_functions_local_map_;
  size_t power_gen_fieldfunc_local_handle_ = 0;

  /// Time integration parameter meant to be set by an executor
  std::shared_ptr<const TimeIntegration> time_integration_ = nullptr;

  /**
   * @brief Data carriers for necessary data to run the sweep on GPU.
   * @details These objects manage GPU memory allocation automatically, organize cross-section,
   * outflow, and mesh data into contiguous memory on the CPU, and handle copying it to the GPU.
   *
   * There are 3 carriers, respectively for cross sections, outflow and mesh.
   */
  std::array<void*, 3> carriers_ = {nullptr, nullptr, nullptr};

  /// Memory pinner for source moments and destination phi.
  std::array<void*, 2> pinners_ = {nullptr, nullptr};

  /// Flag indicating if GPU acceleration is enabled.
  bool use_gpus_;

  /// Checks if the current CPU is associated with any GPU.
  static void CheckCapableDevices();

public:
  static std::map<std::string, uint64_t> supported_boundary_names;
  static std::map<uint64_t, std::string> supported_boundary_ids;

  /// Returns the input parameters for this object.
  static InputParameters GetInputParameters();
};

} // namespace opensn

1	// SPDX-FileCopyrightText: 2024 The OpenSn Authors <https://open-sn.github.io/opensn/>
2	// SPDX-License-Identifier: MIT
3
4	#pragma once
5
6	#include "modules/problem.h"
7	#include "modules/linear_boltzmann_solvers/discrete_ordinates_problem/sweep/sweep.h"
8	#include "modules/linear_boltzmann_solvers/lbs_problem/groupset/lbs_groupset.h"
9	#include "modules/linear_boltzmann_solvers/lbs_problem/point_source/point_source.h"
10	#include "modules/linear_boltzmann_solvers/lbs_problem/volumetric_source/volumetric_source.h"
11	#include "modules/linear_boltzmann_solvers/lbs_problem/lbs_structs.h"
12	#include "framework/math/spatial_discretization/spatial_discretization.h"
13	#include "framework/mesh/mesh_continuum/mesh_continuum.h"
14	#include "framework/math/linear_solver/linear_solver.h"
15	#include "framework/math/spatial_discretization/finite_element/unit_cell_matrices.h"
16	#include <petscksp.h>
17	#include <any>
18	#include <chrono>
19
20	namespace opensn
21	{
22
23	class MPICommunicatorSet;
24	class GridFaceHistogram;
25	class TimeIntegration;
26	class AGSLinearSolver;
27	class WGSLinearSolver;
28	struct WGSContext;
29
30	/// Base class for all Linear Boltzmann Solvers.
31	class LBSProblem : public Problem
32	{
33	public:
34	explicit LBSProblem(const std::string& name, std::shared_ptr<MeshContinuum> grid);
35
36	/// Input parameters based construction.
37	explicit LBSProblem(const InputParameters& params);
38
39	LBSProblem(const LBSProblem&) = delete;
40
41	LBSProblem& operator=(const LBSProblem&) = delete;
42
43	~LBSProblem() override;
44
45	/// Returns a reference to the solver options.
46	LBSOptions& GetOptions();
47
48	/// Returns a constant reference to the solver options.
49	const LBSOptions& GetOptions() const;
50
51	static InputParameters GetOptionsBlock();
52
53	static InputParameters GetBoundaryOptionsBlock();
54
55	static InputParameters GetXSMapEntryBlock();
56
57	void SetOptions(const InputParameters& input);
58
59	void SetBoundaryOptions(const InputParameters& params);
60
61	/// Returns the number of moments for the solver. This will only be non-zero after initialization.
62	size_t GetNumMoments() const;
63
64	/// Returns the number of groups for the solver. This will only be non-zero after initialization.
65	size_t GetNumGroups() const;
66
67	/// Returns the scattering order for the solver. This will only be non-zero after initialization.
68	unsigned int GetScatteringOrder() const;
69
70	/**
71	* Returns the number of precursors for the solver. This will only be non-zero after
72	* initialization.
73	*/
74	size_t GetNumPrecursors() const;
75
76	/**
77	* Returns the maximum number of precursors defined on any material. This will only be non-zero
78	* after initialization.
79	*/
80	size_t GetMaxPrecursorsPerMaterial() const;
81
82	/**
83	* Adds a group to the list of groups. If group id < 0, the id will be logically derived from the
84	* list size. If >= 0 the id will be set to the id specified.
85	*/
86	void AddGroup(int id);
87
88	const std::vector<LBSGroup>& GetGroups() const;
89
90	/**
91	* Adds a groupset to the list of groupsets. The groupset id will be logically derived from the
92	* list size.
93	*/
94	void AddGroupset();
95
96	std::vector<LBSGroupset>& GetGroupsets();
97
98	const std::vector<LBSGroupset>& GetGroupsets() const;
99
100	/// Adds a point source to the solver.
101	void AddPointSource(std::shared_ptr<PointSource> point_source);
102
103	/// Clears all the point sources from the solver.
104	void ClearPointSources();
105
106	/// Constant accessor to the list of point sources.
107	const std::vector<std::shared_ptr<PointSource>>& GetPointSources() const;
108
109	/// Adds a volumetric source to the solver.
110	void AddVolumetricSource(std::shared_ptr<VolumetricSource> volumetric_source);
111
112	/// Clears all the volumetric sources from the solver.
113	void ClearVolumetricSources();
114
115	/// Constant accessor to the list of volumetric sources.
116	const std::vector<std::shared_ptr<VolumetricSource>>& GetVolumetricSources() const;
117
118	/// Clears all the boundary conditions from the solver.
119	void ClearBoundaries();
120
121	size_t& GetLastRestartTime();
122
123	/// Returns a reference to the map of material ids to XSs.
124	const std::map<int, std::shared_ptr<MultiGroupXS>>& GetMatID2XSMap() const;
125
126	/// Obtains a reference to the grid.
127	std::shared_ptr<MeshContinuum> GetGrid() const;
128
129	/// Get pointer to carriers.
130	void* GetCarrier(std::uint32_t idx) { return carriers_.at(idx); }
131
132	/// Get pointer to pinners.
133	void* GetPinner(std::uint32_t idx) { return pinners_.at(idx); }
134
135	/// Obtains a reference to the spatial discretization.
136	const SpatialDiscretization& GetSpatialDiscretization() const;
137
138	/// Returns read-only access to the unit cell matrices.
139	const std::vector<UnitCellMatrices>& GetUnitCellMatrices() const;
140
141	/// Returns read-only access to the unit ghost cell matrices.
142	const std::map<uint64_t, UnitCellMatrices>& GetUnitGhostCellMatrices() const;
143
144	/// Returns a reference to the list of local cell transport views.
145	const std::vector<CellLBSView>& GetCellTransportViews() const;
146
147	/// Read/Write access to the boundary preferences.
148	std::map<uint64_t, BoundaryPreference>& GetBoundaryPreferences();
149
150	/// Obtains a reference to the unknown manager for flux-moments.
151	const UnknownManager& GetUnknownManager() const;
152
153	/// Returns the local node count for the flux-moments data structures.
154	size_t GetLocalNodeCount() const;
155
156	/// Returns the global node count for the flux-moments data structures.
157	size_t GetGlobalNodeCount() const;
158
159	/// Read/write access to source moments vector.
160	std::vector<double>& GetQMomentsLocal();
161
162	/// Read access to source moments vector.
163	const std::vector<double>& GetQMomentsLocal() const;
164
165	/// Read/write access to exterior src moments vector.
166	std::vector<double>& GetExtSrcMomentsLocal();
167
168	/// Read access to exterior src moments vector.
169	const std::vector<double>& GetExtSrcMomentsLocal() const;
170
171	/// Read/write access to last updated flux vector.
172	std::vector<double>& GetPhiOldLocal();
173
174	/// Read access to last updated flux vector.
175	const std::vector<double>& GetPhiOldLocal() const;
176
177	/// Read/write access to newest updated flux vector.
178	std::vector<double>& GetPhiNewLocal();
179
180	/// Read access to newest updated flux vector.
181	const std::vector<double>& GetPhiNewLocal() const;
182
183	/// Read/write access to newest updated precursors vector.
184	std::vector<double>& GetPrecursorsNewLocal();
185
186	/// Read access to newest updated precursors vector.
187	const std::vector<double>& GetPrecursorsNewLocal() const;
188
189	/// Read/write access to the cell-wise densities.
190	std::vector<double>& GetDensitiesLocal();
191
192	/// Read access to the cell-wise densities.
193	const std::vector<double>& GetDensitiesLocal() const;
194
195	SetSourceFunction GetActiveSetSourceFunction() const;
196
197	std::shared_ptr<AGSLinearSolver> GetAGSSolver();
198
199	std::vector<std::shared_ptr<LinearSolver>>& GetWGSSolvers();
200
201	WGSContext& GetWGSContext(int groupset_id);
202
203	/**
204	* Gets the local and global number of iterative unknowns. This normally is only the flux moments,
205	* however, the sweep based solvers might include delayed angular fluxes in this number.
206	*/
207	virtual std::pair<size_t, size_t> GetNumPhiIterativeUnknowns();
208
209	/// Gets the local handle of a flux-moment based field function.
210	size_t MapPhiFieldFunction(size_t g, size_t m) const;
211
212	/// Returns the power generation field function, if enabled.
213	std::shared_ptr<FieldFunctionGridBased> GetPowerFieldFunction() const;
214
215	void Initialize() override;
216
217	/// Initializes default materials and physics materials.
218	void InitializeMaterials();
219
UNCOV 220	bool TriggerRestartDump() const	×
221	{
UNCOV 222	if (options_.write_restart_time_interval <= std::chrono::seconds(0))	×
223	return false;
224
UNCOV 225	auto elapsed = std::chrono::system_clock::now() - options_.last_restart_write_time;	×
226	return elapsed >= options_.write_restart_time_interval;	×
227	}
228
UNCOV 229	void UpdateRestartWriteTime()	×
230	{
231	options_.last_restart_write_time = std::chrono::system_clock::now();	×
232	}
233
234	/// Makes a source-moments vector from scattering and fission based on the latest phi-solution.
235	std::vector<double> MakeSourceMomentsFromPhi();
236
237	/// Copy relevant section of phi_old to the field functions.
238	void UpdateFieldFunctions();
239
240	/// Sets the internal phi vector to the value in the associated field function.
241	void SetPhiFromFieldFunctions(PhiSTLOption which_phi,
242	const std::vector<size_t>& m_indices,
243	const std::vector<size_t>& g_indices);
244
245	/**
246	* A method for post-processing an adjoint solution.
247	*
248	* @note This does nothing for diffusion-based solvers.
249	*/
UNCOV 250	virtual void ReorientAdjointSolution() {};	×
251
252	protected:
253	/// Performs general input checks before initialization continues.
254	virtual void PerformInputChecks();
255
256	/// Prints header information of simulation.
257	void PrintSimHeader();
258
259	virtual void InitializeSpatialDiscretization();
260
261	void ComputeUnitIntegrals();
262
263	/// Initializes common groupset items.
264	void InitializeGroupsets();
265
266	/// Computes the number of moments for the given mesher types
267	void ValidateAndComputeScatteringMoments();
268
269	/// Initializes parallel arrays.
270	virtual void InitializeParrays();
271
272	void InitializeFieldFunctions();
273
274	/// Initializes boundaries.
UNCOV 275	virtual void InitializeBoundaries() {}	×
276
277	virtual void InitializeSolverSchemes();
278
UNCOV 279	virtual void InitializeWGSSolvers() {};	×
280
281	/// Initializes data carriers to GPUs and memory pinner.
282	void InitializeGPUExtras();
283
284	/// Reset data carriers to null and unpin memory.
285	void ResetGPUCarriers();
286
287	virtual void ZeroSolutions() = 0;
288
289	LBSOptions options_;
290	size_t num_moments_ = 0;
291	size_t num_groups_ = 0;
292	unsigned int scattering_order_ = 0;
293	size_t num_precursors_ = 0;
294	size_t max_precursors_per_material_ = 0;
295
296	std::vector<LBSGroup> groups_;
297	std::vector<LBSGroupset> groupsets_;
298
299	std::map<int, std::shared_ptr<MultiGroupXS>> block_id_to_xs_map_;
300
301	std::vector<std::shared_ptr<PointSource>> point_sources_;
302	std::vector<std::shared_ptr<VolumetricSource>> volumetric_sources_;
303
304	std::shared_ptr<MeshContinuum> grid_;
305	std::shared_ptr<SpatialDiscretization> discretization_ = nullptr;
306
307	std::vector<CellFaceNodalMapping> grid_nodal_mappings_;
308	std::shared_ptr<MPICommunicatorSet> grid_local_comm_set_ = nullptr;
309
310	std::vector<UnitCellMatrices> unit_cell_matrices_;
311	std::map<uint64_t, UnitCellMatrices> unit_ghost_cell_matrices_;
312	std::vector<CellLBSView> cell_transport_views_;
313
314	std::map<uint64_t, BoundaryPreference> boundary_preferences_;
315
316	UnknownManager flux_moments_uk_man_;
317
318	size_t max_cell_dof_count_ = 0;
319	uint64_t local_node_count_ = 0;
320	uint64_t global_node_count_ = 0;
321
322	std::vector<double> q_moments_local_, ext_src_moments_local_;
323	std::vector<double> phi_new_local_, phi_old_local_;
324	std::vector<double> precursor_new_local_;
325	std::vector<double> densities_local_;
326
327	SetSourceFunction active_set_source_function_;
328
329	std::shared_ptr<AGSLinearSolver> ags_solver_;
330	std::vector<std::shared_ptr<LinearSolver>> wgs_solvers_;
331
332	std::map<std::pair<size_t, size_t>, size_t> phi_field_functions_local_map_;
333	size_t power_gen_fieldfunc_local_handle_ = 0;
334
335	/// Time integration parameter meant to be set by an executor
336	std::shared_ptr<const TimeIntegration> time_integration_ = nullptr;
337
338	/**
339	* @brief Data carriers for necessary data to run the sweep on GPU.
340	* @details These objects manage GPU memory allocation automatically, organize cross-section,
341	* outflow, and mesh data into contiguous memory on the CPU, and handle copying it to the GPU.
342	*
343	* There are 3 carriers, respectively for cross sections, outflow and mesh.
344	*/
345	std::array<void*, 3> carriers_ = {nullptr, nullptr, nullptr};
346
347	/// Memory pinner for source moments and destination phi.
348	std::array<void*, 2> pinners_ = {nullptr, nullptr};
349
350	/// Flag indicating if GPU acceleration is enabled.
351	bool use_gpus_;
352
353	/// Checks if the current CPU is associated with any GPU.
354	static void CheckCapableDevices();
355
356	public:
357	static std::map<std::string, uint64_t> supported_boundary_names;
358	static std::map<uint64_t, std::string> supported_boundary_ids;
359
360	/// Returns the input parameters for this object.
361	static InputParameters GetInputParameters();
362	};
363
364	} // namespace opensn

Open-Sn / opensn / 18211469908

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