1c4762a1bSJed Brown static char help[] = "Testing MatCreateMPIMatConcatenateSeqMat().\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown int main(int argc,char **argv) 5c4762a1bSJed Brown { 6c4762a1bSJed Brown Mat seqmat,mpimat; 7c4762a1bSJed Brown PetscMPIInt rank; 8c4762a1bSJed Brown PetscScalar value[3],*vals; 9c4762a1bSJed Brown PetscInt i,col[3],n=5,bs=1; 10c4762a1bSJed Brown 11*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 12*9566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 13*9566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-bs",&bs,NULL)); 14c4762a1bSJed Brown 15c4762a1bSJed Brown /* Create seqaij matrices of size (n+rank) by n */ 16*9566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_SELF,&seqmat)); 17*9566063dSJacob Faibussowitsch PetscCall(MatSetSizes(seqmat,(n+rank)*bs,PETSC_DECIDE,PETSC_DECIDE,n*bs)); 18*9566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(seqmat)); 19*9566063dSJacob Faibussowitsch PetscCall(MatSeqAIJSetPreallocation(seqmat,3*bs,NULL)); 20*9566063dSJacob Faibussowitsch PetscCall(MatSeqBAIJSetPreallocation(seqmat,bs,3,NULL)); 21c4762a1bSJed Brown 22c4762a1bSJed Brown if (bs == 1) { 23c4762a1bSJed Brown value[0] = -1.0; value[1] = 2.0; value[2] = -1.0; 24c4762a1bSJed Brown for (i=1; i<n-1; i++) { 25c4762a1bSJed Brown col[0] = i-1; col[1] = i; col[2] = i+1; 26*9566063dSJacob Faibussowitsch PetscCall(MatSetValues(seqmat,1,&i,3,col,value,INSERT_VALUES)); 27c4762a1bSJed Brown } 28c4762a1bSJed Brown i = n - 1; col[0] = n - 2; col[1] = n - 1; 29*9566063dSJacob Faibussowitsch PetscCall(MatSetValues(seqmat,1,&i,2,col,value,INSERT_VALUES)); 30c4762a1bSJed Brown 31c4762a1bSJed Brown i = 0; col[0] = 0; col[1] = 1; value[0] = 2.0; value[1] = -1.0; 32*9566063dSJacob Faibussowitsch PetscCall(MatSetValues(seqmat,1,&i,2,col,value,INSERT_VALUES)); 33c4762a1bSJed Brown } else { 34c4762a1bSJed Brown PetscInt *rows,*cols,j; 35*9566063dSJacob Faibussowitsch PetscCall(PetscMalloc3(bs*bs,&vals,bs,&rows,bs,&cols)); 36c4762a1bSJed Brown /* diagonal blocks */ 37c4762a1bSJed Brown for (i=0; i<bs*bs; i++) vals[i] = 2.0; 38c4762a1bSJed Brown for (i=0; i<n*bs; i+=bs) { 39c4762a1bSJed Brown for (j=0; j<bs; j++) {rows[j] = i+j; cols[j] = i+j;} 40*9566063dSJacob Faibussowitsch PetscCall(MatSetValues(seqmat,bs,rows,bs,cols,vals,INSERT_VALUES)); 41c4762a1bSJed Brown } 42c4762a1bSJed Brown /* off-diagonal blocks */ 43c4762a1bSJed Brown for (i=0; i<bs*bs; i++) vals[i] = -1.0; 44c4762a1bSJed Brown for (i=0; i<(n-1)*bs; i+=bs) { 45c4762a1bSJed Brown for (j=0; j<bs; j++) {rows[j] = i+j; cols[j] = i+bs+j;} 46*9566063dSJacob Faibussowitsch PetscCall(MatSetValues(seqmat,bs,rows,bs,cols,vals,INSERT_VALUES)); 47c4762a1bSJed Brown } 48c4762a1bSJed Brown 49*9566063dSJacob Faibussowitsch PetscCall(PetscFree3(vals,rows,cols)); 50c4762a1bSJed Brown } 51*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(seqmat,MAT_FINAL_ASSEMBLY)); 52*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(seqmat,MAT_FINAL_ASSEMBLY)); 53dd400576SPatrick Sanan if (rank == 0) { 54*9566063dSJacob Faibussowitsch PetscCall(PetscPrintf(PETSC_COMM_SELF,"[%d] seqmat:\n",rank)); 55*9566063dSJacob Faibussowitsch PetscCall(MatView(seqmat,PETSC_VIEWER_STDOUT_SELF)); 56c4762a1bSJed Brown } 57c4762a1bSJed Brown 58*9566063dSJacob Faibussowitsch PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,seqmat,PETSC_DECIDE,MAT_INITIAL_MATRIX,&mpimat)); 59*9566063dSJacob Faibussowitsch PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,seqmat,PETSC_DECIDE,MAT_REUSE_MATRIX,&mpimat)); 60*9566063dSJacob Faibussowitsch PetscCall(MatView(mpimat,PETSC_VIEWER_STDOUT_WORLD)); 61c4762a1bSJed Brown 62*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&seqmat)); 63*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mpimat)); 64*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 65b122ec5aSJacob Faibussowitsch return 0; 66c4762a1bSJed Brown } 67c4762a1bSJed Brown 68c4762a1bSJed Brown /*TEST 69c4762a1bSJed Brown 70c4762a1bSJed Brown test: 71c4762a1bSJed Brown nsize: 3 72c4762a1bSJed Brown 73c4762a1bSJed Brown test: 74c4762a1bSJed Brown suffix: 2 75c4762a1bSJed Brown nsize: 3 76c4762a1bSJed Brown args: -mat_type baij 77c4762a1bSJed Brown 78c4762a1bSJed Brown test: 79c4762a1bSJed Brown suffix: 3 80c4762a1bSJed Brown nsize: 3 81c4762a1bSJed Brown args: -mat_type baij -bs 2 82c4762a1bSJed Brown 83c4762a1bSJed Brown TEST*/ 84