1 static char help[] = "Testing MatCreateMPIMatConcatenateSeqMat().\n\n"; 2 3 #include <petscmat.h> 4 int main(int argc,char **argv) 5 { 6 PetscErrorCode ierr; 7 Mat seqmat,mpimat; 8 PetscMPIInt rank; 9 PetscScalar value[3],*vals; 10 PetscInt i,col[3],n=5,bs=1; 11 12 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 13 ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRMPI(ierr); 14 ierr = PetscOptionsGetInt(NULL,NULL,"-bs",&bs,NULL);CHKERRQ(ierr); 15 16 /* Create seqaij matrices of size (n+rank) by n */ 17 ierr = MatCreate(PETSC_COMM_SELF,&seqmat);CHKERRQ(ierr); 18 ierr = MatSetSizes(seqmat,(n+rank)*bs,PETSC_DECIDE,PETSC_DECIDE,n*bs);CHKERRQ(ierr); 19 ierr = MatSetFromOptions(seqmat);CHKERRQ(ierr); 20 ierr = MatSeqAIJSetPreallocation(seqmat,3*bs,NULL);CHKERRQ(ierr); 21 ierr = MatSeqBAIJSetPreallocation(seqmat,bs,3,NULL);CHKERRQ(ierr); 22 23 if (bs == 1) { 24 value[0] = -1.0; value[1] = 2.0; value[2] = -1.0; 25 for (i=1; i<n-1; i++) { 26 col[0] = i-1; col[1] = i; col[2] = i+1; 27 ierr = MatSetValues(seqmat,1,&i,3,col,value,INSERT_VALUES);CHKERRQ(ierr); 28 } 29 i = n - 1; col[0] = n - 2; col[1] = n - 1; 30 ierr = MatSetValues(seqmat,1,&i,2,col,value,INSERT_VALUES);CHKERRQ(ierr); 31 32 i = 0; col[0] = 0; col[1] = 1; value[0] = 2.0; value[1] = -1.0; 33 ierr = MatSetValues(seqmat,1,&i,2,col,value,INSERT_VALUES);CHKERRQ(ierr); 34 } else { 35 PetscInt *rows,*cols,j; 36 ierr = PetscMalloc3(bs*bs,&vals,bs,&rows,bs,&cols);CHKERRQ(ierr); 37 /* diagonal blocks */ 38 for (i=0; i<bs*bs; i++) vals[i] = 2.0; 39 for (i=0; i<n*bs; i+=bs) { 40 for (j=0; j<bs; j++) {rows[j] = i+j; cols[j] = i+j;} 41 ierr = MatSetValues(seqmat,bs,rows,bs,cols,vals,INSERT_VALUES);CHKERRQ(ierr); 42 } 43 /* off-diagonal blocks */ 44 for (i=0; i<bs*bs; i++) vals[i] = -1.0; 45 for (i=0; i<(n-1)*bs; i+=bs) { 46 for (j=0; j<bs; j++) {rows[j] = i+j; cols[j] = i+bs+j;} 47 ierr = MatSetValues(seqmat,bs,rows,bs,cols,vals,INSERT_VALUES);CHKERRQ(ierr); 48 } 49 50 ierr = PetscFree3(vals,rows,cols);CHKERRQ(ierr); 51 } 52 ierr = MatAssemblyBegin(seqmat,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 53 ierr = MatAssemblyEnd(seqmat,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 54 if (!rank) { 55 ierr = PetscPrintf(PETSC_COMM_SELF,"[%d] seqmat:\n",rank);CHKERRQ(ierr); 56 ierr = MatView(seqmat,PETSC_VIEWER_STDOUT_SELF);CHKERRQ(ierr); 57 } 58 59 ierr = MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,seqmat,PETSC_DECIDE,MAT_INITIAL_MATRIX,&mpimat);CHKERRQ(ierr); 60 ierr = MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,seqmat,PETSC_DECIDE,MAT_REUSE_MATRIX,&mpimat);CHKERRQ(ierr); 61 ierr = MatView(mpimat,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 62 63 ierr = MatDestroy(&seqmat);CHKERRQ(ierr); 64 ierr = MatDestroy(&mpimat);CHKERRQ(ierr); 65 ierr = PetscFinalize(); 66 return ierr; 67 } 68 69 /*TEST 70 71 test: 72 nsize: 3 73 74 test: 75 suffix: 2 76 nsize: 3 77 args: -mat_type baij 78 79 test: 80 suffix: 3 81 nsize: 3 82 args: -mat_type baij -bs 2 83 84 TEST*/ 85