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Updates to object lifecycle for WeightWindows and WeightWindowGenerators (#2582)
This commit is contained in:
Patrick Shriwise
GitHub
parent
36f229eb01
commit
382bcb2e8e
6 changed files with 275 additions and 211 deletions
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@ -15,211 +15,215 @@
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#include "openmc/tallies/tally.h"
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#include "openmc/vector.h"
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namespace openmc
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{
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namespace openmc {
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enum class WeightWindowUpdateMethod {
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MAGIC,
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};
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enum class WeightWindowUpdateMethod {
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MAGIC,
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};
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//==============================================================================
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// Constants
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//==============================================================================
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//==============================================================================
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// Constants
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//==============================================================================
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constexpr double DEFAULT_WEIGHT_CUTOFF {1.0e-38}; // default low weight cutoff
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constexpr double DEFAULT_WEIGHT_CUTOFF {1.0e-38}; // default low weight cutoff
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//==============================================================================
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// Non-member functions
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//==============================================================================
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//==============================================================================
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// Non-member functions
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//==============================================================================
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//! Apply weight windows to a particle
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//! \param[in] p Particle to apply weight windows to
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void apply_weight_windows(Particle & p);
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//! Apply weight windows to a particle
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//! \param[in] p Particle to apply weight windows to
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void apply_weight_windows(Particle& p);
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//! Free memory associated with weight windows
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void free_memory_weight_windows();
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//! Free memory associated with weight windows
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void free_memory_weight_windows();
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//==============================================================================
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// Global variables
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//==============================================================================
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//==============================================================================
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// Global variables
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//==============================================================================
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class WeightWindows;
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class WeightWindowsGenerator;
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class WeightWindows;
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class WeightWindowsGenerator;
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namespace variance_reduction {
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namespace variance_reduction {
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extern std::unordered_map<int32_t, int32_t> ww_map;
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extern vector<unique_ptr<WeightWindows>> weight_windows;
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extern vector<unique_ptr<WeightWindowsGenerator>> weight_windows_generators;
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extern std::unordered_map<int32_t, int32_t> ww_map;
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extern vector<unique_ptr<WeightWindows>> weight_windows;
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extern vector<unique_ptr<WeightWindowsGenerator>> weight_windows_generators;
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} // namespace variance_reduction
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} // namespace variance_reduction
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//==============================================================================
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//! Individual weight window information
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//==============================================================================
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//==============================================================================
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//! Individual weight window information
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//==============================================================================
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struct WeightWindow {
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double lower_weight {-1}; // -1 indicates invalid state
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double upper_weight {1};
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double max_lb_ratio {1};
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double survival_weight {0.5};
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double weight_cutoff {DEFAULT_WEIGHT_CUTOFF};
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int max_split {1};
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struct WeightWindow {
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double lower_weight {-1}; // -1 indicates invalid state
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double upper_weight {1};
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double max_lb_ratio {1};
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double survival_weight {0.5};
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double weight_cutoff {DEFAULT_WEIGHT_CUTOFF};
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int max_split {10};
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//! Whether the weight window is in a valid state
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bool is_valid() const { return lower_weight >= 0.0; }
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//! Whether the weight window is in a valid state
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bool is_valid() const { return lower_weight >= 0.0; }
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//! Adjust the weight window by a constant factor
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void scale(double factor)
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{
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lower_weight *= factor;
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upper_weight *= factor;
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}
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};
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//! Adjust the weight window by a constant factor
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void scale(double factor)
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{
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lower_weight *= factor;
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upper_weight *= factor;
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}
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};
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//==============================================================================
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//! Weight window settings
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//==============================================================================
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//==============================================================================
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//! Weight window settings
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//==============================================================================
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class WeightWindows {
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public:
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//----------------------------------------------------------------------------
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// Constructors
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WeightWindows(int32_t id = -1);
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WeightWindows(pugi::xml_node node);
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~WeightWindows();
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static WeightWindows* create(int32_t id = -1);
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static WeightWindows* from_hdf5(
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hid_t wws_group, const std::string& group_name);
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class WeightWindows {
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public:
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//----------------------------------------------------------------------------
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// Constructors
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WeightWindows(int32_t id = -1);
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WeightWindows(pugi::xml_node node);
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~WeightWindows();
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static WeightWindows* create(int32_t id = -1);
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static WeightWindows* from_hdf5(
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hid_t wws_group, const std::string& group_name);
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//----------------------------------------------------------------------------
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// Methods
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private:
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template<class T>
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void check_bounds(const T& lower, const T& upper) const;
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//----------------------------------------------------------------------------
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// Methods
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private:
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template<class T>
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void check_bounds(const T& lower, const T& upper) const;
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template<class T>
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void check_bounds(const T& lower) const;
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template<class T>
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void check_bounds(const T& lower) const;
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void check_tally_update_compatibility(const Tally* tally);
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void check_tally_update_compatibility(const Tally* tally);
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public:
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//! Set the weight window ID
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void set_id(int32_t id = -1);
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public:
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//! Set the weight window ID
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void set_id(int32_t id = -1);
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void set_energy_bounds(gsl::span<const double> bounds);
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void set_energy_bounds(gsl::span<const double> bounds);
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void set_mesh(const std::unique_ptr<Mesh>& mesh);
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void set_mesh(const std::unique_ptr<Mesh>& mesh);
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void set_mesh(const Mesh* mesh);
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void set_mesh(const Mesh* mesh);
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void set_mesh(int32_t mesh_idx);
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void set_mesh(int32_t mesh_idx);
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//! Ready the weight window class for use
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void set_defaults();
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//! Ready the weight window class for use
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void set_defaults();
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//! Update weight window boundaries using tally results
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//! \param[in] tally Pointer to the tally whose results will be used to
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//! update weight windows \param[in] value String representing the type of
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//! value to use for weight window generation (one of "mean" or "rel_err")
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//! \param[in] threshold Relative error threshold. Results over this
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//! threshold will be ignored \param[in] ratio Ratio of upper to lower
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//! weight window bounds
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void update_magic(const Tally* tally, const std::string& value = "mean",
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double threshold = 1.0, double ratio = 5.0);
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//! Ensure the weight window lower bounds are properly allocated
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void allocate_ww_bounds();
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// NOTE: This is unused for now but may be used in the future
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//! Write weight window settings to an HDF5 file
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//! \param[in] group HDF5 group to write to
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void to_hdf5(hid_t group) const;
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//! Update weight window boundaries using tally results
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//! \param[in] tally Pointer to the tally whose results will be used to
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//! update weight windows \param[in] value String representing the type of
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//! value to use for weight window generation (one of "mean" or "rel_err")
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//! \param[in] threshold Relative error threshold. Results over this
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//! threshold will be ignored \param[in] ratio Ratio of upper to lower
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//! weight window bounds
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void update_magic(const Tally* tally, const std::string& value = "mean",
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double threshold = 1.0, double ratio = 5.0);
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//! Retrieve the weight window for a particle
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//! \param[in] p Particle to get weight window for
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WeightWindow get_weight_window(const Particle& p) const;
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// NOTE: This is unused for now but may be used in the future
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//! Write weight window settings to an HDF5 file
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//! \param[in] group HDF5 group to write to
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void to_hdf5(hid_t group) const;
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std::array<int, 2> bounds_size() const;
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//! Retrieve the weight window for a particle
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//! \param[in] p Particle to get weight window for
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WeightWindow get_weight_window(const Particle& p) const;
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const vector<double>& energy_bounds() const { return energy_bounds_; }
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std::array<int, 2> bounds_size() const;
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void set_bounds(const xt::xtensor<double, 2>& lower_ww_bounds,
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const xt::xtensor<double, 2>& upper_bounds);
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const vector<double>& energy_bounds() const { return energy_bounds_; }
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void set_bounds(const xt::xtensor<double, 2>& lower_bounds, double ratio);
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void set_bounds(const xt::xtensor<double, 2>& lower_ww_bounds,
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const xt::xtensor<double, 2>& upper_bounds);
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void set_bounds(gsl::span<const double> lower_bounds,
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gsl::span<const double> upper_bounds);
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void set_bounds(const xt::xtensor<double, 2>& lower_bounds, double ratio);
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void set_bounds(gsl::span<const double> lower_bounds, double ratio);
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void set_bounds(
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gsl::span<const double> lower_bounds, gsl::span<const double> upper_bounds);
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void set_particle_type(ParticleType p_type);
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void set_bounds(gsl::span<const double> lower_bounds, double ratio);
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//----------------------------------------------------------------------------
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// Accessors
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int32_t id() const { return id_; }
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int32_t& id() { return id_; }
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void set_particle_type(ParticleType p_type);
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int32_t index() const { return index_; }
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//----------------------------------------------------------------------------
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// Accessors
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int32_t id() const { return id_; }
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int32_t& id() { return id_; }
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vector<double>& energy_bounds() { return energy_bounds_; }
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int32_t index() const { return index_; }
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const std::unique_ptr<Mesh>& mesh() const
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{
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return model::meshes[mesh_idx_];
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}
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vector<double>& energy_bounds() { return energy_bounds_; }
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const xt::xtensor<double, 2>& lower_ww_bounds() const { return lower_ww_; }
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xt::xtensor<double, 2>& lower_ww_bounds() { return lower_ww_; }
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const std::unique_ptr<Mesh>& mesh() const { return model::meshes[mesh_idx_]; }
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const xt::xtensor<double, 2>& upper_ww_bounds() const { return upper_ww_; }
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xt::xtensor<double, 2>& upper_ww_bounds() { return upper_ww_; }
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const xt::xtensor<double, 2>& lower_ww_bounds() const { return lower_ww_; }
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xt::xtensor<double, 2>& lower_ww_bounds() { return lower_ww_; }
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ParticleType particle_type() const { return particle_type_; }
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const xt::xtensor<double, 2>& upper_ww_bounds() const { return upper_ww_; }
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xt::xtensor<double, 2>& upper_ww_bounds() { return upper_ww_; }
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private:
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//----------------------------------------------------------------------------
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// Data members
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int32_t id_; //!< Unique ID
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gsl::index index_; //!< Index into weight windows vector
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ParticleType particle_type_ {
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ParticleType::neutron}; //!< Particle type to apply weight windows to
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vector<double> energy_bounds_; //!< Energy boundaries [eV]
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xt::xtensor<double, 2> lower_ww_; //!< Lower weight window bounds (shape:
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//!< energy_bins, mesh_bins (k, j, i))
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xt::xtensor<double, 2>
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upper_ww_; //!< Upper weight window bounds (shape: energy_bins, mesh_bins)
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double survival_ratio_ {3.0}; //!< Survival weight ratio
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double max_lb_ratio_ {
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1.0}; //!< Maximum lower bound to particle weight ratio
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double weight_cutoff_ {DEFAULT_WEIGHT_CUTOFF}; //!< Weight cutoff
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int max_split_ {10}; //!< Maximum value for particle splitting
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int32_t mesh_idx_; //!< Index in meshes vector
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};
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ParticleType particle_type() const { return particle_type_; }
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class WeightWindowsGenerator {
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public:
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// Constructors
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WeightWindowsGenerator(pugi::xml_node node);
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private:
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//----------------------------------------------------------------------------
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// Data members
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int32_t id_; //!< Unique ID
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gsl::index index_; //!< Index into weight windows vector
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ParticleType particle_type_ {
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ParticleType::neutron}; //!< Particle type to apply weight windows to
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vector<double> energy_bounds_; //!< Energy boundaries [eV]
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xt::xtensor<double, 2> lower_ww_; //!< Lower weight window bounds (shape:
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//!< energy_bins, mesh_bins (k, j, i))
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xt::xtensor<double, 2>
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upper_ww_; //!< Upper weight window bounds (shape: energy_bins, mesh_bins)
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double survival_ratio_ {3.0}; //!< Survival weight ratio
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double max_lb_ratio_ {1.0}; //!< Maximum lower bound to particle weight ratio
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double weight_cutoff_ {DEFAULT_WEIGHT_CUTOFF}; //!< Weight cutoff
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int max_split_ {10}; //!< Maximum value for particle splitting
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int32_t mesh_idx_ {-1}; //!< Index in meshes vector
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};
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// Methods
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void update() const;
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class WeightWindowsGenerator {
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public:
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// Constructors
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WeightWindowsGenerator(pugi::xml_node node);
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// Data members
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int32_t
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tally_idx_; //!< Index of the tally used to update the weight windows
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int32_t ww_idx_; //!< Index of the weight windows object being generated
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std::string method_; //!< Method used to update weight window. Only "magic"
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//!< is valid for now.
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int32_t max_realizations_; //!< Maximum number of tally realizations
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int32_t update_interval_; //!< Determines how often updates occur
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bool on_the_fly_; //!< Whether or not weight windows
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// Methods
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void update() const;
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// MAGIC update parameters
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std::string tally_value_ {
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"mean"}; //<! Tally value to use (one of {"mean", "rel_err"})
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double threshold_ {1.0}; //<! Relative error threshold for values used to
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//update weight windows
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double ratio_ {5.0}; //<! ratio of lower to upper weight window bounds
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};
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//! Create the tally used for weight window generation
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void create_tally();
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// Data members
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int32_t tally_idx_; //!< Index of the tally used to update the weight windows
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int32_t ww_idx_; //!< Index of the weight windows object being generated
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std::string method_; //!< Method used to update weight window. Only "magic"
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//!< is valid for now.
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int32_t max_realizations_; //!< Maximum number of tally realizations
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int32_t update_interval_; //!< Determines how often updates occur
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bool on_the_fly_; //!< Whether or not to keep tally results between batches or
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//!< realizations
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// MAGIC update parameters
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std::string tally_value_ {
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"mean"}; //<! Tally value to use (one of {"mean", "rel_err"})
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double threshold_ {1.0}; //<! Relative error threshold for values used to
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// update weight windows
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double ratio_ {5.0}; //<! ratio of lower to upper weight window bounds
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};
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//! Finalize variance reduction objects after all inputs have been read
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void finalize_variance_reduction();
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} // namespace openmc
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#endif // OPENMC_WEIGHT_WINDOWS_H
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