1 static const char help[] = "Test MatGetLocalSubMatrix() with multiple levels of nesting.\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc, char *argv[]) 6 { 7 PetscErrorCode ierr; 8 IS is0a,is0b,is0,is1,isl0a,isl0b,isl0,isl1; 9 Mat A,Aexplicit; 10 PetscBool usenest; 11 PetscMPIInt rank,size; 12 PetscInt i,j; 13 14 ierr = PetscInitialize(&argc,&argv,NULL,help);if (ierr) return ierr; 15 CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 16 CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 17 18 { 19 PetscInt ix0a[1],ix0b[1],ix0[2],ix1[1]; 20 21 ix0a[0] = rank*2+0; 22 ix0b[0] = rank*2+1; 23 ix0[0] = rank*3+0; ix0[1] = rank*3+1; 24 ix1[0] = rank*3+2; 25 CHKERRQ(ISCreateGeneral(PETSC_COMM_WORLD,1,ix0a,PETSC_COPY_VALUES,&is0a)); 26 CHKERRQ(ISCreateGeneral(PETSC_COMM_WORLD,1,ix0b,PETSC_COPY_VALUES,&is0b)); 27 CHKERRQ(ISCreateGeneral(PETSC_COMM_WORLD,2,ix0,PETSC_COPY_VALUES,&is0)); 28 CHKERRQ(ISCreateGeneral(PETSC_COMM_WORLD,1,ix1,PETSC_COPY_VALUES,&is1)); 29 } 30 { 31 CHKERRQ(ISCreateStride(PETSC_COMM_SELF,6,0,1,&isl0)); 32 CHKERRQ(ISCreateStride(PETSC_COMM_SELF,3,0,1,&isl0a)); 33 CHKERRQ(ISCreateStride(PETSC_COMM_SELF,3,3,1,&isl0b)); 34 CHKERRQ(ISCreateStride(PETSC_COMM_SELF,3,6,1,&isl1)); 35 } 36 37 usenest = PETSC_FALSE; 38 CHKERRQ(PetscOptionsGetBool(NULL,NULL,"-nest",&usenest,NULL)); 39 if (usenest) { 40 ISLocalToGlobalMapping l2g; 41 PetscInt l2gind[3]; 42 Mat B[9]; 43 44 l2gind[0] = (rank-1+size)%size; l2gind[1] = rank; l2gind[2] = (rank+1)%size; 45 CHKERRQ(ISLocalToGlobalMappingCreate(PETSC_COMM_WORLD,1,3,l2gind,PETSC_COPY_VALUES,&l2g)); 46 for (i=0; i<9; i++) { 47 CHKERRQ(MatCreateAIJ(PETSC_COMM_WORLD,1,1,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,NULL,PETSC_DECIDE,NULL,&B[i])); 48 CHKERRQ(MatSetUp(B[i])); 49 CHKERRQ(MatSetLocalToGlobalMapping(B[i],l2g,l2g)); 50 } 51 { 52 IS isx[2]; 53 Mat Bx00[4],Bx01[2],Bx10[2]; 54 Mat B00,B01,B10; 55 56 isx[0] = is0a; isx[1] = is0b; 57 Bx00[0] = B[0]; Bx00[1] = B[1]; Bx00[2] = B[3]; Bx00[3] = B[4]; 58 Bx01[0] = B[2]; Bx01[1] = B[5]; 59 Bx10[0] = B[6]; Bx10[1] = B[7]; 60 61 CHKERRQ(MatCreateNest(PETSC_COMM_WORLD,2,isx,2,isx,Bx00,&B00)); 62 CHKERRQ(MatSetUp(B00)); 63 CHKERRQ(MatCreateNest(PETSC_COMM_WORLD,2,isx,1,NULL,Bx01,&B01)); 64 CHKERRQ(MatSetUp(B01)); 65 CHKERRQ(MatCreateNest(PETSC_COMM_WORLD,1,NULL,2,isx,Bx10,&B10)); 66 CHKERRQ(MatSetUp(B10)); 67 { 68 Mat By[4]; 69 IS isy[2]; 70 71 By[0] = B00; By[1] = B01; By[2] = B10; By[3] = B[8]; 72 isy[0] = is0; isy[1] = is1; 73 74 CHKERRQ(MatCreateNest(PETSC_COMM_WORLD,2,isy,2,isy,By,&A)); 75 CHKERRQ(MatSetUp(A)); 76 } 77 CHKERRQ(MatDestroy(&B00)); 78 CHKERRQ(MatDestroy(&B01)); 79 CHKERRQ(MatDestroy(&B10)); 80 } 81 for (i=0; i<9; i++) CHKERRQ(MatDestroy(&B[i])); 82 CHKERRQ(ISLocalToGlobalMappingDestroy(&l2g)); 83 } else { 84 ISLocalToGlobalMapping l2g; 85 PetscInt l2gind[9]; 86 for (i=0; i<3; i++) for (j=0; j<3; j++) l2gind[3*i+j] = ((rank-1+j+size) % size)*3 + i; 87 CHKERRQ(ISLocalToGlobalMappingCreate(PETSC_COMM_WORLD,1,9,l2gind,PETSC_COPY_VALUES,&l2g)); 88 CHKERRQ(MatCreateAIJ(PETSC_COMM_WORLD,3,3,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,NULL,PETSC_DECIDE,NULL,&A)); 89 CHKERRQ(MatSetLocalToGlobalMapping(A,l2g,l2g)); 90 CHKERRQ(ISLocalToGlobalMappingDestroy(&l2g)); 91 } 92 93 { 94 Mat A00,A11,A0a0a,A0a0b; 95 CHKERRQ(MatGetLocalSubMatrix(A,isl0,isl0,&A00)); 96 CHKERRQ(MatGetLocalSubMatrix(A,isl1,isl1,&A11)); 97 CHKERRQ(MatGetLocalSubMatrix(A00,isl0a,isl0a,&A0a0a)); 98 CHKERRQ(MatGetLocalSubMatrix(A00,isl0a,isl0b,&A0a0b)); 99 100 CHKERRQ(MatSetValueLocal(A0a0a,0,0,100*rank+1,ADD_VALUES)); 101 CHKERRQ(MatSetValueLocal(A0a0a,0,1,100*rank+2,ADD_VALUES)); 102 CHKERRQ(MatSetValueLocal(A0a0a,2,2,100*rank+9,ADD_VALUES)); 103 104 CHKERRQ(MatSetValueLocal(A0a0b,1,1,100*rank+50+5,ADD_VALUES)); 105 106 CHKERRQ(MatSetValueLocal(A11,0,0,1000*(rank+1)+1,ADD_VALUES)); 107 CHKERRQ(MatSetValueLocal(A11,1,2,1000*(rank+1)+6,ADD_VALUES)); 108 109 CHKERRQ(MatRestoreLocalSubMatrix(A00,isl0a,isl0a,&A0a0a)); 110 CHKERRQ(MatRestoreLocalSubMatrix(A00,isl0a,isl0b,&A0a0b)); 111 CHKERRQ(MatRestoreLocalSubMatrix(A,isl0,isl0,&A00)); 112 CHKERRQ(MatRestoreLocalSubMatrix(A,isl1,isl1,&A11)); 113 } 114 CHKERRQ(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 115 CHKERRQ(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 116 117 CHKERRQ(MatComputeOperator(A,MATAIJ,&Aexplicit)); 118 CHKERRQ(MatView(Aexplicit,PETSC_VIEWER_STDOUT_WORLD)); 119 120 CHKERRQ(MatDestroy(&A)); 121 CHKERRQ(MatDestroy(&Aexplicit)); 122 CHKERRQ(ISDestroy(&is0a)); 123 CHKERRQ(ISDestroy(&is0b)); 124 CHKERRQ(ISDestroy(&is0)); 125 CHKERRQ(ISDestroy(&is1)); 126 CHKERRQ(ISDestroy(&isl0a)); 127 CHKERRQ(ISDestroy(&isl0b)); 128 CHKERRQ(ISDestroy(&isl0)); 129 CHKERRQ(ISDestroy(&isl1)); 130 ierr = PetscFinalize(); 131 return ierr; 132 } 133 134 /*TEST 135 136 test: 137 nsize: 3 138 139 test: 140 suffix: nest 141 nsize: 3 142 args: -nest 143 144 TEST*/ 145