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Fix performance regression in libMesh unstructured mesh tallies (#3577)

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Kevin Sawatzky 2025-09-23 11:31:14 -05:00 • committed by GitHub
parent 8f36ff2b3a
commit ed433fe1cd
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2 changed files with 101 additions and 57 deletions
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49
include/openmc/mesh.h
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@ -990,25 +990,26 @@ public:
libMesh::MeshBase* mesh_ptr() const { return m_; };
protected:
// Methods
//! Translate a bin value to an element reference
virtual const libMesh::Elem& get_element_from_bin(int bin) const;
//! Translate an element pointer to a bin index
virtual int get_bin_from_element(const libMesh::Elem* elem) const;
libMesh::MeshBase* m_; //!< pointer to libMesh MeshBase instance, always set
//!< during intialization
private:
void initialize() override;
void set_mesh_pointer_from_filename(const std::string& filename);
void build_eqn_sys();
// Methods
//! Translate a bin value to an element reference
const libMesh::Elem& get_element_from_bin(int bin) const;
//! Translate an element pointer to a bin index
int get_bin_from_element(const libMesh::Elem* elem) const;
// Data members
unique_ptr<libMesh::MeshBase> unique_m_ =
nullptr; //!< pointer to the libMesh MeshBase instance, only used if mesh is
//!< created inside OpenMC
libMesh::MeshBase* m_; //!< pointer to libMesh MeshBase instance, always set
//!< during intialization
vector<unique_ptr<libMesh::PointLocatorBase>>
pl_; //!< per-thread point locators
unique_ptr<libMesh::EquationSystems>
@ -1022,8 +1023,34 @@ private:
libMesh::BoundingBox bbox_; //!< bounding box of the mesh
libMesh::dof_id_type
first_element_id_; //!< id of the first element in the mesh
};
class AdaptiveLibMesh : public LibMesh {
public:
// Constructor
AdaptiveLibMesh(
libMesh::MeshBase& input_mesh, double length_multiplier = 1.0);
// Overridden methods
int n_bins() const override;
void add_score(const std::string& var_name) override;
void set_score_data(const std::string& var_name, const vector<double>& values,
const vector<double>& std_dev) override;
void write(const std::string& filename) const override;
protected:
// Overridden methods
int get_bin_from_element(const libMesh::Elem* elem) const override;
const libMesh::Elem& get_element_from_bin(int bin) const override;
private:
// Data members
const libMesh::dof_id_type num_active_; //!< cached number of active elements
const bool adaptive_; //!< whether this mesh has adaptivity enabled or not
std::vector<libMesh::dof_id_type>
bin_to_elem_map_; //!< mapping bin indices to dof indices for active
//!< elements