Actual source code: ex75.c

petsc-master 2020-08-09
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  1:  #include <petsc.h>

  3: static char help[] = "Solves a series of linear systems using KSPHPDDM.\n\n";

  5: int main(int argc,char **args)
  6: {
  7:   Vec            x,b;        /* computed solution and RHS */
  8:   Mat            A;          /* linear system matrix */
  9:   KSP            ksp;        /* linear solver context */
 10: #if defined(PETSC_HAVE_HPDDM)
 11:   Mat            U;          /* deflation space */
 12: #endif
 13:   PetscInt       i,j,nmat = 10;
 14:   PetscViewer    viewer;
 15:   char           dir[PETSC_MAX_PATH_LEN],name[256];
 16:   PetscBool      flg,reset = PETSC_FALSE;

 19:   PetscInitialize(&argc,&args,NULL,help);if (ierr) return ierr;
 20:   PetscStrcpy(dir,".");
 21:   PetscOptionsGetString(NULL,NULL,"-load_dir",dir,sizeof(dir),NULL);
 22:   PetscOptionsGetInt(NULL,NULL,"-nmat",&nmat,NULL);
 23:   PetscOptionsGetBool(NULL,NULL,"-reset",&reset,NULL);
 24:   MatCreate(PETSC_COMM_WORLD,&A);
 25:   KSPCreate(PETSC_COMM_WORLD,&ksp);
 26:   KSPSetOperators(ksp,A,A);
 27:   for (i=0; i<nmat; i++) {
 28:     j = i+400;
 29:     PetscSNPrintf(name,sizeof(name),"%s/A_%d.dat",dir,j);
 30:     PetscViewerBinaryOpen(PETSC_COMM_WORLD,name,FILE_MODE_READ,&viewer);
 31:     MatLoad(A,viewer);
 32:     PetscViewerDestroy(&viewer);
 33:     if (i == 0) {
 34:       MatCreateVecs(A,&x,&b);
 35:     }
 36:     PetscSNPrintf(name,sizeof(name),"%s/rhs_%d.dat",dir,j);
 37:     PetscViewerBinaryOpen(PETSC_COMM_WORLD,name,FILE_MODE_READ,&viewer);
 38:     VecLoad(b,viewer);
 39:     PetscViewerDestroy(&viewer);
 40:     KSPSetFromOptions(ksp);
 41:     KSPSolve(ksp,b,x);
 42:     PetscObjectTypeCompare((PetscObject)ksp,KSPHPDDM,&flg);
 43: #if defined(PETSC_HAVE_HPDDM)
 44:     if (flg && reset) {
 45:       KSPHPDDMGetDeflationSpace(ksp,&U);
 46:       KSPReset(ksp);
 47:       KSPSetOperators(ksp,A,A);
 48:       KSPSetFromOptions(ksp);
 49:       KSPSetUp(ksp);
 50:       if (U) {
 51:         KSPHPDDMSetDeflationSpace(ksp,U);
 52:         MatDestroy(&U);
 53:       }
 54:     }
 55: #endif
 56:   }
 57:   VecDestroy(&x);
 58:   VecDestroy(&b);
 59:   MatDestroy(&A);
 60:   KSPDestroy(&ksp);
 61:   PetscFinalize();
 62:   return ierr;
 63: }

 65: /*TEST

 67:    test:
 68:       suffix: 1
 69:       nsize: 1
 70:       requires: hpddm datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
 71:       args: -nmat 1 -pc_type none -ksp_converged_reason -ksp_type {{gmres hpddm}shared output} -ksp_max_it 1000 -ksp_gmres_restart 1000 -ksp_rtol 1e-10 -ksp_hpddm_type {{gmres bgmres}shared output} -options_left no -load_dir ${DATAFILESPATH}/matrices/hpddm/GCRODR

 73:    test:
 74:       requires: hpddm datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
 75:       suffix: 1_icc
 76:       nsize: 1
 77:       args: -nmat 1 -pc_type icc -ksp_converged_reason -ksp_type {{gmres hpddm}shared output} -ksp_max_it 1000 -ksp_gmres_restart 1000 -ksp_rtol 1e-10 -load_dir ${DATAFILESPATH}/matrices/hpddm/GCRODR

 79:    testset:
 80:       requires: hpddm datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
 81:       args: -nmat 3 -pc_type none -ksp_converged_reason -ksp_type hpddm -ksp_max_it 1000 -ksp_gmres_restart 40 -ksp_rtol 1e-10 -ksp_hpddm_type {{gcrodr bgcrodr}shared output} -ksp_hpddm_recycle 20 -load_dir ${DATAFILESPATH}/matrices/hpddm/GCRODR
 82:       test:
 83:         nsize: 1
 84:         suffix: 2_seq
 85:         output_file: output/ex75_2.out
 86:       test:
 87:         nsize: 2
 88:         suffix: 2_par
 89:         output_file: output/ex75_2.out

 91:    testset:
 92:       requires: hpddm datafilespath double !complex !define(PETSC_USE_64BIT_INDICES)
 93:       nsize: 1
 94:       args: -nmat 3 -pc_type icc -ksp_converged_reason -ksp_type hpddm -ksp_max_it 1000 -ksp_gmres_restart 40 -ksp_rtol 1e-10 -ksp_hpddm_type {{gcrodr bgcrodr}shared output} -ksp_hpddm_recycle 20 -reset {{false true}shared output} -load_dir ${DATAFILESPATH}/matrices/hpddm/GCRODR
 95:       test:
 96:         suffix: 2_icc
 97:         args:
 98:       test:
 99:         suffix: 2_icc_atol
100:         args: -ksp_atol 1e-12

102:    test:
103:       requires: hpddm datafilespath double !complex !define(PETSC_USE_64BIT_INDICES) slepc
104:       nsize: 2
105:       suffix: symmetric
106:       args: -nmat 3 -pc_type jacobi -ksp_converged_reason -ksp_type hpddm -ksp_max_it 1000 -ksp_gmres_restart 40 -ksp_atol 1e-11 -ksp_hpddm_type bgcrodr -ksp_hpddm_recycle 20 -reset {{false true}shared output} -load_dir ${DATAFILESPATH}/matrices/hpddm/GCRODR -ksp_hpddm_recycle_symmetric true

108: TEST*/