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 PetscFunctionBeginUser; 12 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 13 PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 14 PetscCall(PetscOptionsGetInt(NULL,NULL,"-bs",&bs,NULL)); 15 16 /* Create seqaij matrices of size (n+rank) by n */ 17 PetscCall(MatCreate(PETSC_COMM_SELF,&seqmat)); 18 PetscCall(MatSetSizes(seqmat,(n+rank)*bs,PETSC_DECIDE,PETSC_DECIDE,n*bs)); 19 PetscCall(MatSetFromOptions(seqmat)); 20 PetscCall(MatSeqAIJSetPreallocation(seqmat,3*bs,NULL)); 21 PetscCall(MatSeqBAIJSetPreallocation(seqmat,bs,3,NULL)); 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 PetscCall(MatSetValues(seqmat,1,&i,3,col,value,INSERT_VALUES)); 28 } 29 i = n - 1; col[0] = n - 2; col[1] = n - 1; 30 PetscCall(MatSetValues(seqmat,1,&i,2,col,value,INSERT_VALUES)); 31 32 i = 0; col[0] = 0; col[1] = 1; value[0] = 2.0; value[1] = -1.0; 33 PetscCall(MatSetValues(seqmat,1,&i,2,col,value,INSERT_VALUES)); 34 } else { 35 PetscInt *rows,*cols,j; 36 PetscCall(PetscMalloc3(bs*bs,&vals,bs,&rows,bs,&cols)); 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 PetscCall(MatSetValues(seqmat,bs,rows,bs,cols,vals,INSERT_VALUES)); 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 PetscCall(MatSetValues(seqmat,bs,rows,bs,cols,vals,INSERT_VALUES)); 48 } 49 50 PetscCall(PetscFree3(vals,rows,cols)); 51 } 52 PetscCall(MatAssemblyBegin(seqmat,MAT_FINAL_ASSEMBLY)); 53 PetscCall(MatAssemblyEnd(seqmat,MAT_FINAL_ASSEMBLY)); 54 if (rank == 0) { 55 PetscCall(PetscPrintf(PETSC_COMM_SELF,"[%d] seqmat:\n",rank)); 56 PetscCall(MatView(seqmat,PETSC_VIEWER_STDOUT_SELF)); 57 } 58 59 PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,seqmat,PETSC_DECIDE,MAT_INITIAL_MATRIX,&mpimat)); 60 PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,seqmat,PETSC_DECIDE,MAT_REUSE_MATRIX,&mpimat)); 61 PetscCall(MatView(mpimat,PETSC_VIEWER_STDOUT_WORLD)); 62 63 PetscCall(MatDestroy(&seqmat)); 64 PetscCall(MatDestroy(&mpimat)); 65 PetscCall(PetscFinalize()); 66 return 0; 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