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