Date: 2022-03-04T17:39:47+00:00

Actual source code: petsclandau.h

      1: #if !defined(PETSCLANDAU_H)
      2: #define PETSCLANDAU_H

      4: #include <petscdmplex.h>
      5: #include <petscts.h>

      7: PETSC_EXTERN PetscErrorCode LandauPrintNorms(Vec, PetscInt);
      8: PETSC_EXTERN PetscErrorCode LandauCreateVelocitySpace(MPI_Comm,PetscInt,const char[],Vec*,Mat*,DM*);
      9: PETSC_EXTERN PetscErrorCode LandauDestroyVelocitySpace(DM*);
     10: PETSC_EXTERN PetscErrorCode LandauAddMaxwellians(DM, Vec, PetscReal, PetscReal[], PetscReal[], PetscInt, void *);
     11: PETSC_EXTERN PetscErrorCode LandauCreateMassMatrix(DM dm, Mat *Amat);
     12: PETSC_EXTERN PetscErrorCode LandauIFunction(TS, PetscReal,Vec,Vec,Vec,void *);
     13: PETSC_EXTERN PetscErrorCode LandauIJacobian(TS, PetscReal,Vec,Vec,PetscReal,Mat,Mat,void *);

     15: /* the Fokker-Planck-Landau context */
     16: #if !defined(LANDAU_DIM)
     17: #define LANDAU_DIM 2
     18: #endif

     20: #if !defined(LANDAU_MAX_SPECIES)
     21: #if LANDAU_DIM==2
     22: #define LANDAU_MAX_SPECIES 10
     23: #define LANDAU_MAX_GRIDS 3
     24: #else
     25: #define LANDAU_MAX_SPECIES 3
     26: #define LANDAU_MAX_GRIDS 2
     27: #endif
     28: #else
     29: #define LANDAU_MAX_GRIDS 3
     30: #endif

     32: #if !defined(LANDAU_MAX_Q)
     33: #if defined(LANDAU_MAX_NQ)
     34: #error"LANDAU_MAX_NQ but not LANDAU_MAX_Q. Use -DLANDAU_MAX_Q=4 for Q3 elements"
     35: #endif
     36: #if LANDAU_DIM==2
     37: #define LANDAU_MAX_Q 5
     38: #else
     39: #define LANDAU_MAX_Q 3
     40: #endif
     41: #else
     42: #undef LANDAU_MAX_NQ
     43: #endif

     45: #if LANDAU_DIM==2
     46: #define LANDAU_MAX_Q_FACE LANDAU_MAX_Q
     47: #define LANDAU_MAX_NQ (LANDAU_MAX_Q*LANDAU_MAX_Q)
     48: #else
     49: #define LANDAU_MAX_Q_FACE (LANDAU_MAX_Q*LANDAU_MAX_Q)
     50: #define LANDAU_MAX_NQ (LANDAU_MAX_Q*LANDAU_MAX_Q*LANDAU_MAX_Q)
     51: #endif

     53: typedef enum {LANDAU_CUDA, LANDAU_KOKKOS, LANDAU_CPU} LandauDeviceType;

     55: // static data
     56: typedef struct {
     57:   void  *invJ;  // nip*dim*dim
     58:   void  *D;     // nq*nb*dim
     59:   void  *B;     // nq*nb
     60:   void  *alpha; // ns
     61:   void  *beta;  // ns
     62:   void  *invMass; // ns
     63:   void  *w; // nip
     64:   void  *x; // nip
     65:   void  *y; // nip
     66:   void  *z; // nip
     67:   void  *Eq_m; // ns - dynamic
     68:   void  *f; //  nip*Nf - dynamic (IP)
     69:   void  *dfdx; // nip*Nf - dynamic (IP)
     70:   void  *dfdy; // nip*Nf - dynamic (IP)
     71:   void  *dfdz; // nip*Nf - dynamic (IP)
     72:   int   dim_,ns_,nip_,nq_,nb_;
     73:   void  *NCells;
     74:   void  *species_offset;
     75:   void  *mat_offset;
     76:   void  *elem_offset;
     77:   void  *ip_offset;
     78:   void  *ipf_offset;
     79:   void  *ipfdf_data;
     80:   void  *maps;
     81: } LandauStaticData;

     83: typedef struct {
     84:   PetscBool      interpolate;                  /* Generate intermediate mesh elements */
     85:   PetscBool      gpu_assembly;
     86:   MPI_Comm       comm; /* global communicator to use for errors and diagnostics */
     87:   double         times[1];
     88:   PetscBool      initialized;
     89:   PetscBool      use_matrix_mass;
     90:   /* FE */
     91:   PetscFE        fe[LANDAU_MAX_SPECIES];
     92:   /* geometry  */
     93:   PetscReal      radius[LANDAU_MAX_GRIDS];
     94:   PetscReal      re_radius;           /* RE: radius of refinement along v_perp=0, z>0 */
     95:   PetscReal      vperp0_radius1;      /* RE: radius of refinement along v_perp=0 */
     96:   PetscReal      vperp0_radius2;      /* RE: radius of refinement along v_perp=0 after origin AMR refinement */
     97:   PetscBool      sphere; // not used
     98:   PetscBool      inflate; // not used
     99:   PetscReal      i_radius[LANDAU_MAX_GRIDS]; // not used
    100:   PetscReal      e_radius; // not used
    101:   PetscInt       num_sections; // not used
    102:   /* AMR */
    103:   PetscBool      use_p4est;
    104:   PetscInt       numRERefine;        /* RE: refinement along v_perp=0, z > 0 */
    105:   PetscInt       nZRefine1;          /* RE: origin refinement after v_perp=0 refinement */
    106:   PetscInt       nZRefine2;          /* RE: origin refinement after origin AMR refinement */
    107:   PetscInt       numAMRRefine[LANDAU_MAX_GRIDS];  /* normal AMR - refine from origin */
    108:   PetscInt       postAMRRefine[LANDAU_MAX_GRIDS]; /* uniform refinement of AMR */
    109:   /* relativistic */
    110:   PetscBool      use_energy_tensor_trick;
    111:   PetscBool      use_relativistic_corrections;
    112:   /* physics */
    113:   PetscReal      thermal_temps[LANDAU_MAX_SPECIES];
    114:   PetscReal      masses[LANDAU_MAX_SPECIES];  /* mass of each species  */
    115:   PetscReal      charges[LANDAU_MAX_SPECIES]; /* charge of each species  */
    116:   PetscReal      n[LANDAU_MAX_SPECIES];       /* number density of each species  */
    117:   PetscReal      m_0;      /* reference mass */
    118:   PetscReal      v_0;      /* reference velocity */
    119:   PetscReal      n_0;      /* reference number density */
    120:   PetscReal      t_0;      /* reference time */
    121:   PetscReal      Ez;
    122:   PetscReal      epsilon0;
    123:   PetscReal      k;
    124:   PetscReal      lnLam;
    125:   PetscReal      electronShift;
    126:   PetscInt       num_species;
    127:   PetscInt       num_grids;
    128:   PetscInt       species_offset[LANDAU_MAX_GRIDS+1];
    129:   PetscInt       mat_offset[LANDAU_MAX_GRIDS+1];
    130:   /* cache */
    131:   Mat            J;
    132:   Mat            M;
    133:   Vec            X;
    134:   /* derived type */
    135:   void          *data;
    136:   PetscBool      aux_bool;  /* helper */
    137:   /* computing */
    138:   LandauDeviceType deviceType;
    139:   PetscInt       subThreadBlockSize;
    140:   PetscInt       numConcurrency; /* number of SMs in Cuda to use */
    141:   DM             pack;
    142:   DM             plex[LANDAU_MAX_GRIDS];
    143:   LandauStaticData SData_d; /* static geometric data on device, this holds host pointers */
    144:   /* diagnostics */
    145:   PetscInt       verbose;
    146:   PetscLogEvent  events[20];
    147: } LandauCtx;

    149: typedef int LandauIdx;
    150: typedef struct {
    151:   PetscReal scale;
    152:   LandauIdx gid;   // Lanadu matrix index (<10,000)
    153: } pointInterpolationP4est;
    154: typedef struct _lP4estVertexMaps {
    155:   LandauIdx                (*gIdx)[LANDAU_MAX_SPECIES][LANDAU_MAX_NQ]; // #elems *  LANDAU_MAX_NQ (spoof for max , Nb) on device,
    156:   LandauIdx                num_elements;
    157:   LandauIdx                num_reduced;
    158:   LandauIdx                num_face;  // (Q or Q^2 for 3D)
    159:   LandauDeviceType         deviceType;
    160:   PetscInt                 Nf;
    161:   PetscInt                 Nq;
    162:   pointInterpolationP4est (*c_maps)[LANDAU_MAX_Q_FACE];
    163:   struct _lP4estVertexMaps*d_self;
    164:   void                    *vp1,*vp2,*vp3;
    165:   PetscInt                numgrids;
    166: } P4estVertexMaps;

    168: PETSC_EXTERN PetscErrorCode LandauCreateColoring(Mat, DM, PetscContainer *);
    169: #if defined(PETSC_HAVE_CUDA)
    170: PETSC_EXTERN PetscErrorCode LandauCUDAJacobian(DM[], const PetscInt, const PetscInt, const PetscInt[], PetscReal[], PetscScalar[], const PetscInt, const PetscScalar[],
    171:                                                const LandauStaticData *, const PetscInt, const PetscReal, const PetscLogEvent[],const PetscInt[], const PetscInt[], Mat[], Mat);
    172: PETSC_EXTERN PetscErrorCode LandauCUDACreateMatMaps(P4estVertexMaps *, pointInterpolationP4est (*)[LANDAU_MAX_Q_FACE], PetscInt[], PetscInt, PetscInt);
    173: PETSC_EXTERN PetscErrorCode LandauCUDADestroyMatMaps(P4estVertexMaps *, PetscInt);
    174: PETSC_EXTERN PetscErrorCode LandauCUDAStaticDataSet(DM, const PetscInt, const PetscInt, PetscInt[], PetscInt[], PetscInt[], PetscReal [], PetscReal [], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[],
    175:                                                     PetscReal[], LandauStaticData *);
    176: PETSC_EXTERN PetscErrorCode LandauCUDAStaticDataClear(LandauStaticData *);
    177: #endif
    178: #if defined(PETSC_HAVE_KOKKOS)
    179: PETSC_EXTERN PetscErrorCode LandauKokkosJacobian(DM[], const PetscInt, const PetscInt, const PetscInt[], PetscReal[], PetscScalar[],  const PetscInt, const PetscScalar[],
    180:                                                  const LandauStaticData *, const PetscInt, const PetscReal, const PetscLogEvent[], const PetscInt[], const PetscInt[], Mat[], Mat);
    181: PETSC_EXTERN PetscErrorCode LandauKokkosCreateMatMaps(P4estVertexMaps *, pointInterpolationP4est (*)[LANDAU_MAX_Q_FACE], PetscInt[], PetscInt, PetscInt);
    182: PETSC_EXTERN PetscErrorCode LandauKokkosDestroyMatMaps(P4estVertexMaps *, PetscInt);
    183: PETSC_EXTERN PetscErrorCode LandauKokkosStaticDataSet(DM, const PetscInt, const PetscInt, PetscInt[], PetscInt[], PetscInt[], PetscReal [], PetscReal [], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[],
    184:                                                       PetscReal[], LandauStaticData *);
    185: PETSC_EXTERN PetscErrorCode LandauKokkosStaticDataClear(LandauStaticData*);
    186: #endif

    188: #endif /* PETSCLANDAU_H */