Date: 2021-03-03T22:27:34+00:00

Actual source code: ex75.c
petsc-3.14.5 2021-03-03
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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*/