1 2 static char help[] = "Tests MatGetColumnVector()."; 3 4 #include <petscmat.h> 5 6 int main(int argc,char **args) 7 { 8 Mat C; 9 PetscInt i,j,m = 3,n = 2,Ii,J,col = 0; 10 PetscMPIInt size,rank; 11 PetscErrorCode ierr; 12 PetscScalar v; 13 Vec yy; 14 15 ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 16 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-col",&col,NULL)); 17 18 CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 19 CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 20 n = 2*size; 21 22 /* create the matrix for the five point stencil, YET AGAIN*/ 23 CHKERRQ(MatCreate(PETSC_COMM_WORLD,&C)); 24 CHKERRQ(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 25 CHKERRQ(MatSetFromOptions(C)); 26 CHKERRQ(MatSeqAIJSetPreallocation(C,5,NULL)); 27 CHKERRQ(MatMPIAIJSetPreallocation(C,5,NULL,5,NULL)); 28 CHKERRQ(MatSetUp(C)); 29 30 for (i=0; i<m; i++) { 31 for (j=2*rank; j<2*rank+2; j++) { 32 v = -1.0; Ii = j + n*i; 33 if (i>0) {J = Ii - n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 34 if (i<m-1) {J = Ii + n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 35 if (j>0) {J = Ii - 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 36 if (j<n-1) {J = Ii + 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 37 v = 4.0; CHKERRQ(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 38 } 39 } 40 CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 41 CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 42 CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 43 44 CHKERRQ(MatCreateVecs(C,NULL,&yy)); 45 CHKERRQ(VecSetFromOptions(yy)); 46 47 CHKERRQ(MatGetColumnVector(C,yy,col)); 48 49 CHKERRQ(VecView(yy,PETSC_VIEWER_STDOUT_WORLD)); 50 51 CHKERRQ(VecDestroy(&yy)); 52 CHKERRQ(MatDestroy(&C)); 53 ierr = PetscFinalize(); 54 return ierr; 55 } 56 57 /*TEST 58 59 test: 60 nsize: 3 61 args: -col 7 62 63 test: 64 suffix: dense 65 nsize: 3 66 args: -col 7 -mat_type dense -vec_type {{mpi standard}} 67 filter: grep -v type 68 69 test: 70 requires: cuda 71 suffix: dense_cuda 72 nsize: 3 73 output_file: output/ex60_dense.out 74 args: -col 7 -mat_type {{mpidense mpidensecuda}} -vec_type {{mpi standard cuda mpicuda}} 75 filter: grep -v type 76 77 TEST*/ 78