1: static char help[] = "Landau collision operator driver\n\n";

  3: #include <petscts.h>
  4: #include <petsclandau.h>

  6: int main(int argc, char **argv)
  7: {
  8:   DM             dm;
  9:   Vec            X,X_0;
 10:   PetscInt       dim=2;
 11:   TS             ts;
 12:   Mat            J;
 13:   SNES           snes;
 14:   KSP            ksp;
 15:   PC             pc;
 16:   SNESLineSearch linesearch;
 17:   PetscReal      time;

 19:   PetscInitialize(&argc, &argv, NULL,help);
 20:   PetscOptionsGetInt(NULL,NULL, "-dim", &dim, NULL);
 21:   /* Create a mesh */
 22:   DMPlexLandauCreateVelocitySpace(PETSC_COMM_SELF, dim, "", &X, &J, &dm);
 23:   DMSetUp(dm);
 24:   VecDuplicate(X,&X_0);
 25:   VecCopy(X,X_0);
 26:   DMPlexLandauPrintNorms(X,0);
 27:   DMSetOutputSequenceNumber(dm, 0, 0.0);
 28:   DMViewFromOptions(dm,NULL,"-dm_view");
 29:   VecViewFromOptions(X,NULL,"-vec_view");
 30:   /* Create timestepping solver context */
 31:   TSCreate(PETSC_COMM_SELF,&ts);
 32:   TSSetDM(ts,dm);
 33:   TSGetSNES(ts,&snes);
 34:   SNESGetLineSearch(snes,&linesearch);
 35:   SNESLineSearchSetType(linesearch,SNESLINESEARCHBASIC);
 36:   TSSetIFunction(ts,NULL,DMPlexLandauIFunction,NULL);
 37:   TSSetIJacobian(ts,J,J,DMPlexLandauIJacobian,NULL);
 38:   TSSetExactFinalTime(ts,TS_EXACTFINALTIME_STEPOVER);
 39:   SNESGetKSP(snes,&ksp);
 40:   KSPGetPC(ksp,&pc);
 41:   TSSetFromOptions(ts);
 42:   TSSetSolution(ts,X);
 43:   TSSolve(ts,X);
 44:   DMPlexLandauPrintNorms(X,1);
 45:   TSGetTime(ts, &time);
 46:   DMSetOutputSequenceNumber(dm, 1, time);
 47:   VecViewFromOptions(X,NULL,"-vec_view");
 48:   VecAXPY(X,-1,X_0);
 49:   /* clean up */
 50:   DMPlexLandauDestroyVelocitySpace(&dm);
 51:   TSDestroy(&ts);
 52:   VecDestroy(&X);
 53:   VecDestroy(&X_0);
 54:   PetscFinalize();
 55:   return 0;
 56: }

 58: /*TEST
 59:   testset:
 60:     requires: p4est !complex double
 61:     output_file: output/ex1_0.out
 62:     args: -dm_landau_num_species_grid 1,2 -petscspace_degree 3 -petscspace_poly_tensor 1 -dm_landau_type p4est -dm_landau_ion_masses 2,4 -dm_landau_ion_charges 1,18 -dm_landau_thermal_temps 5,5,.5 -dm_landau_n 1.00018,1,1e-5 -dm_landau_n_0 1e20 -ts_monitor -snes_rtol 1.e-14 -snes_stol 1.e-14 -snes_monitor -snes_converged_reason -ts_type arkimex -ts_arkimex_type 1bee -ts_max_snes_failures -1 -ts_rtol 1e-1 -ts_dt 1.e-1 -ts_max_time 1 -ts_adapt_clip .5,1.25 -ts_adapt_scale_solve_failed 0.75 -ts_adapt_time_step_increase_delay 5 -ts_max_steps 1 -pc_type lu -ksp_type preonly -dm_landau_amr_levels_max 2,1
 63:     test:
 64:       suffix: cpu
 65:       args: -dm_landau_device_type cpu
 66:     test:
 67:       suffix: kokkos
 68:       requires: kokkos_kernels
 69:       args: -dm_landau_device_type kokkos -dm_mat_type aijkokkos -dm_vec_type kokkos
 70:     test:
 71:       suffix: cuda
 72:       requires: cuda
 73:       args: -dm_landau_device_type cuda -dm_mat_type aijcusparse -dm_vec_type cuda -mat_cusparse_use_cpu_solve

 75: TEST*/