xref: /petsc/include/petsclandau.h (revision f6652e4db288daef4fde592b05de6e040a66c19b)
1 #ifndef PETSCLANDAU_H
2 #define PETSCLANDAU_H
3 
4 #include <petscdmplex.h> /*I      "petscdmplex.h"    I*/
5 #include <petscts.h>
6 
7 PETSC_EXTERN PetscErrorCode DMPlexLandauPrintNorms(Vec, PetscInt);
8 PETSC_EXTERN PetscErrorCode DMPlexLandauCreateVelocitySpace(MPI_Comm, PetscInt, const char[], Vec *, Mat *, DM *);
9 PETSC_EXTERN PetscErrorCode DMPlexLandauDestroyVelocitySpace(DM *);
10 PETSC_EXTERN PetscErrorCode DMPlexLandauAccess(DM, Vec, PetscErrorCode (*)(DM, Vec, PetscInt, PetscInt, PetscInt, void *), void *);
11 PETSC_EXTERN PetscErrorCode DMPlexLandauAddMaxwellians(DM, Vec, PetscReal, PetscReal[], PetscReal[], PetscInt, PetscInt, PetscInt, void *);
12 PETSC_EXTERN PetscErrorCode DMPlexLandauCreateMassMatrix(DM dm, Mat *Amat);
13 PETSC_EXTERN PetscErrorCode DMPlexLandauIFunction(TS, PetscReal, Vec, Vec, Vec, void *);
14 PETSC_EXTERN PetscErrorCode DMPlexLandauIJacobian(TS, PetscReal, Vec, Vec, PetscReal, Mat, Mat, void *);
15 
16 typedef int LandauIdx;
17 
18 /* the Fokker-Planck-Landau context */
19 #if !defined(LANDAU_MAX_SPECIES)
20   #if defined(PETSC_USE_DMLANDAU_2D)
21     #define LANDAU_MAX_SPECIES 10
22     #define LANDAU_MAX_GRIDS   3
23   #else
24     #define LANDAU_MAX_SPECIES 10
25     #define LANDAU_MAX_GRIDS   3
26   #endif
27 #else
28   #define LANDAU_MAX_GRIDS 3
29 #endif
30 
31 #if !defined(LANDAU_MAX_Q)
32   #if defined(LANDAU_MAX_NQ)
33     #error "LANDAU_MAX_NQ but not LANDAU_MAX_Q. Use -DLANDAU_MAX_Q=4 for Q3 elements"
34   #endif
35   #if defined(PETSC_USE_DMLANDAU_2D)
36     #define LANDAU_MAX_Q 6
37   #else
38     // 3D CUDA fails with > 3 (KK-CUDA is OK)
39     #define LANDAU_MAX_Q 4
40   #endif
41 #else
42   #undef LANDAU_MAX_NQ
43 #endif
44 
45 #if defined(PETSC_USE_DMLANDAU_2D)
46   #define LANDAU_MAX_Q_FACE   LANDAU_MAX_Q
47   #define LANDAU_MAX_NQ       (LANDAU_MAX_Q * LANDAU_MAX_Q)
48   #define LANDAU_MAX_BATCH_SZ 1024
49   #define LANDAU_DIM          2
50 #else
51   #define LANDAU_MAX_Q_FACE   (LANDAU_MAX_Q * LANDAU_MAX_Q)
52   #define LANDAU_MAX_NQ       (LANDAU_MAX_Q * LANDAU_MAX_Q * LANDAU_MAX_Q)
53   #define LANDAU_MAX_BATCH_SZ 64
54   #define LANDAU_DIM          3
55 #endif
56 
57 typedef enum {
58   LANDAU_CUDA,
59   LANDAU_KOKKOS,
60   LANDAU_CPU
61 } LandauDeviceType;
62 
63 // static data - will be "device" data
64 typedef struct {
65   void *invJ;    // nip*dim*dim
66   void *D;       // nq*nb*dim
67   void *B;       // nq*nb
68   void *alpha;   // ns
69   void *beta;    // ns
70   void *invMass; // ns
71   void *w;       // nip
72   void *x;       // nip
73   void *y;       // nip
74   void *z;       // nip
75   void *Eq_m;    // ns - dynamic
76   void *f;       //  nip*Nf - dynamic (IP)
77   void *dfdx;    // nip*Nf - dynamic (IP)
78   void *dfdy;    // nip*Nf - dynamic (IP)
79   void *dfdz;    // nip*Nf - dynamic (IP)
80   int   dim_, ns_, nip_, nq_, nb_;
81   void *NCells;         // remove and use elem_offset - TODO
82   void *species_offset; // for each grid, but same for all batched vertices
83   void *mat_offset;     // for each grid, but same for all batched vertices
84   void *elem_offset;    // for each grid, but same for all batched vertices
85   void *ip_offset;      // for each grid, but same for all batched vertices
86   void *ipf_offset;     // for each grid, but same for all batched vertices
87   void *ipfdf_data;     // for each grid, but same for all batched vertices
88   void *maps;           // for each grid, but same for all batched vertices
89   // COO
90   void     *coo_elem_offsets;
91   void     *coo_elem_point_offsets;
92   void     *coo_elem_fullNb;
93   void     *coo_vals;
94   void     *lambdas;
95   LandauIdx coo_n_cellsTot;
96   LandauIdx coo_size;
97   LandauIdx coo_max_fullnb;
98 } LandauStaticData;
99 
100 typedef enum {
101   LANDAU_EX2_TSSOLVE,
102   LANDAU_MATRIX_TOTAL,
103   LANDAU_OPERATOR,
104   LANDAU_JACOBIAN_COUNT,
105   LANDAU_JACOBIAN,
106   LANDAU_MASS,
107   LANDAU_F_DF,
108   LANDAU_KERNEL,
109   KSP_FACTOR,
110   KSP_SOLVE,
111   LANDAU_NUM_TIMERS
112 } LandauOMPTimers;
113 
114 typedef struct {
115   PetscBool interpolate; /* Generate intermediate mesh elements */
116   PetscBool gpu_assembly;
117   MPI_Comm  comm; /* global communicator to use for errors and diagnostics */
118   double    times[LANDAU_NUM_TIMERS];
119   PetscBool use_matrix_mass;
120   /* FE */
121   PetscFE fe[LANDAU_MAX_SPECIES];
122   /* geometry  */
123   PetscReal radius[LANDAU_MAX_GRIDS];
124   PetscReal radius_par[LANDAU_MAX_GRIDS];
125   PetscReal radius_perp[LANDAU_MAX_GRIDS];
126   PetscReal re_radius;      /* RE: radius of refinement along v_perp=0, z>0 */
127   PetscReal vperp0_radius1; /* RE: radius of refinement along v_perp=0 */
128   PetscReal vperp0_radius2; /* RE: radius of refinement along v_perp=0 after origin AMR refinement */
129   PetscBool sphere;         // not working in FEM
130   PetscInt  cells0[3];
131   /* AMR */
132   PetscBool use_p4est;
133   PetscInt  numRERefine;                     /* RE: refinement along v_perp=0, z > 0 */
134   PetscInt  nZRefine1;                       /* RE: origin refinement after v_perp=0 refinement */
135   PetscInt  nZRefine2;                       /* RE: origin refinement after origin AMR refinement */
136   PetscInt  numAMRRefine[LANDAU_MAX_GRIDS];  /* normal AMR - refine from origin */
137   PetscInt  postAMRRefine[LANDAU_MAX_GRIDS]; /* uniform refinement of AMR */
138   /* relativistic */
139   PetscBool use_energy_tensor_trick;
140   PetscBool use_relativistic_corrections;
141   /* physics */
142   PetscReal thermal_temps[LANDAU_MAX_SPECIES];
143   PetscReal masses[LANDAU_MAX_SPECIES];  /* mass of each species  */
144   PetscReal charges[LANDAU_MAX_SPECIES]; /* charge of each species  */
145   PetscReal n[LANDAU_MAX_SPECIES];       /* number density of each species  */
146   PetscReal m_0;                         /* reference mass */
147   PetscReal v_0;                         /* reference velocity */
148   PetscReal n_0;                         /* reference number density */
149   PetscReal t_0;                         /* reference time */
150   PetscReal Ez;
151   PetscReal epsilon0;
152   PetscReal k;
153   PetscReal lambdas[LANDAU_MAX_GRIDS][LANDAU_MAX_GRIDS];
154   PetscReal electronShift;
155   PetscInt  num_species;
156   PetscInt  num_grids;
157   PetscInt  species_offset[LANDAU_MAX_GRIDS + 1]; // for each grid, but same for all batched vertices
158   PetscInt  mat_offset[LANDAU_MAX_GRIDS + 1];     // for each grid, but same for all batched vertices
159   // batching
160   PetscBool  jacobian_field_major_order; // this could be a type but lets not get pedantic
161   VecScatter plex_batch;
162   Vec        work_vec;
163   IS         batch_is;
164   PetscErrorCode (*seqaij_mult)(Mat, Vec, Vec);
165   PetscErrorCode (*seqaij_multtranspose)(Mat, Vec, Vec);
166   PetscErrorCode (*seqaij_solve)(Mat, Vec, Vec);
167   PetscErrorCode (*seqaij_getdiagonal)(Mat, Vec);
168   /* COO */
169   PetscBool coo_assembly;
170   /* cache */
171   Mat J;
172   Mat M;
173   Vec X;
174   /* derived type */
175   void *data;
176   /* computing */
177   LandauDeviceType deviceType;
178   DM               pack;
179   DM               plex[LANDAU_MAX_GRIDS];
180   LandauStaticData SData_d; /* static geometric data on device */
181   /* diagnostics */
182   PetscInt         verbose;
183   PetscLogEvent    events[20];
184   PetscLogStage    stage;
185   PetscObjectState norm_state;
186   PetscInt         batch_sz;
187   PetscInt         batch_view_idx;
188 } LandauCtx;
189 
190 #define LANDAU_SPECIES_MAJOR
191 #if !defined(LANDAU_SPECIES_MAJOR)
192   #define LAND_PACK_IDX(_b, _g)                         (_b * ctx->num_grids + _g)
193   #define LAND_MOFFSET(_b, _g, _nbch, _ngrid, _mat_off) (_b * _mat_off[_ngrid] + _mat_off[_g])
194 #else
195   #define LAND_PACK_IDX(_b, _g)                         (_g * ctx->batch_sz + _b)
196   #define LAND_MOFFSET(_b, _g, _nbch, _ngrid, _mat_off) (_nbch * _mat_off[_g] + _b * (_mat_off[_g + 1] - _mat_off[_g]))
197 #endif
198 
199 typedef struct {
200   PetscReal scale;
201   LandauIdx gid; // Landau matrix index (<10,000)
202 } pointInterpolationP4est;
203 typedef struct _lP4estVertexMaps {
204   LandauIdx (*gIdx)[LANDAU_MAX_SPECIES][LANDAU_MAX_NQ]; // #elems *  LANDAU_MAX_NQ (spoof for max , Nb) on device,
205   LandauIdx        num_elements;
206   LandauIdx        num_reduced;
207   LandauIdx        num_face; // (Q or Q^2 for 3D)
208   LandauDeviceType deviceType;
209   PetscInt         Nf;
210   pointInterpolationP4est (*c_maps)[LANDAU_MAX_Q_FACE];
211   struct _lP4estVertexMaps *d_self;
212   void                     *vp1, *vp2, *vp3;
213   PetscInt                  numgrids;
214 } P4estVertexMaps;
215 
216 PETSC_EXTERN PetscErrorCode LandauCreateColoring(Mat, DM, PetscContainer *);
217 #if defined(PETSC_HAVE_CUDA)
218 PETSC_EXTERN PetscErrorCode LandauCUDAJacobian(DM[], const PetscInt, const PetscInt, const PetscInt, const PetscInt[], PetscReal[], PetscScalar[], const PetscScalar[], const LandauStaticData *, const PetscReal, const PetscLogEvent[], const PetscInt[], const PetscInt[], Mat[], Mat);
219 PETSC_EXTERN PetscErrorCode LandauCUDACreateMatMaps(P4estVertexMaps *, pointInterpolationP4est (*)[LANDAU_MAX_Q_FACE], PetscInt[], PetscInt, PetscInt);
220 PETSC_EXTERN PetscErrorCode LandauCUDADestroyMatMaps(P4estVertexMaps *, PetscInt);
221 PETSC_EXTERN PetscErrorCode LandauCUDAStaticDataSet(DM, const PetscInt, const PetscInt, const PetscInt, PetscInt[], PetscInt[], PetscInt[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], LandauStaticData *);
222 PETSC_EXTERN PetscErrorCode LandauCUDAStaticDataClear(LandauStaticData *);
223 #endif
224 #if defined(PETSC_HAVE_KOKKOS)
225 PETSC_EXTERN PetscErrorCode LandauKokkosJacobian(DM[], const PetscInt, const PetscInt, const PetscInt, const PetscInt[], PetscReal[], PetscScalar[], const PetscScalar[], const LandauStaticData *, const PetscReal, const PetscLogEvent[], const PetscInt[], const PetscInt[], Mat[], Mat);
226 PETSC_EXTERN PetscErrorCode LandauKokkosCreateMatMaps(P4estVertexMaps *, pointInterpolationP4est (*)[LANDAU_MAX_Q_FACE], PetscInt[], PetscInt, PetscInt);
227 PETSC_EXTERN PetscErrorCode LandauKokkosDestroyMatMaps(P4estVertexMaps *, PetscInt);
228 PETSC_EXTERN PetscErrorCode LandauKokkosStaticDataSet(DM, const PetscInt, const PetscInt, const PetscInt, PetscInt[], PetscInt[], PetscInt[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], PetscReal[], LandauStaticData *);
229 PETSC_EXTERN PetscErrorCode LandauKokkosStaticDataClear(LandauStaticData *);
230 #endif
231 
232 #endif /* PETSCLANDAU_H */
233