1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatCreateSubMatrices() for SBAIJ matrices\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat BAIJ,SBAIJ,*subBAIJ,*subSBAIJ; 9c4762a1bSJed Brown PetscViewer viewer; 10c4762a1bSJed Brown char file[PETSC_MAX_PATH_LEN]; 11c4762a1bSJed Brown PetscBool flg; 12c4762a1bSJed Brown PetscInt n = 2,issize,M,N; 13c4762a1bSJed Brown PetscMPIInt rank; 14c4762a1bSJed Brown IS isrow,iscol,irow[n],icol[n]; 15c4762a1bSJed Brown 16*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 17*9566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetString(NULL,NULL,"-f",file,sizeof(file),&flg)); 18*9566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer)); 19c4762a1bSJed Brown 20*9566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&BAIJ)); 21*9566063dSJacob Faibussowitsch PetscCall(MatSetType(BAIJ,MATMPIBAIJ)); 22*9566063dSJacob Faibussowitsch PetscCall(MatLoad(BAIJ,viewer)); 23*9566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 24c4762a1bSJed Brown 25*9566063dSJacob Faibussowitsch PetscCall(PetscViewerBinaryOpen(PETSC_COMM_WORLD,file,FILE_MODE_READ,&viewer)); 26*9566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&SBAIJ)); 27*9566063dSJacob Faibussowitsch PetscCall(MatSetType(SBAIJ,MATMPISBAIJ)); 28*9566063dSJacob Faibussowitsch PetscCall(MatLoad(SBAIJ,viewer)); 29*9566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 30c4762a1bSJed Brown 31*9566063dSJacob Faibussowitsch PetscCall(MatGetSize(BAIJ,&M,&N)); 32c4762a1bSJed Brown issize = M/4; 33*9566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF,issize,0,1,&isrow)); 34c4762a1bSJed Brown irow[0] = irow[1] = isrow; 35c4762a1bSJed Brown issize = N/2; 36*9566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF,issize,0,1,&iscol)); 37c4762a1bSJed Brown icol[0] = icol[1] = iscol; 38*9566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(BAIJ,n,irow,icol,MAT_INITIAL_MATRIX,&subBAIJ)); 39*9566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(BAIJ,n,irow,icol,MAT_REUSE_MATRIX,&subBAIJ)); 40c4762a1bSJed Brown 41c4762a1bSJed Brown /* irow and icol must be same for SBAIJ matrices! */ 42c4762a1bSJed Brown icol[0] = icol[1] = isrow; 43*9566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(SBAIJ,n,irow,icol,MAT_INITIAL_MATRIX,&subSBAIJ)); 44*9566063dSJacob Faibussowitsch PetscCall(MatCreateSubMatrices(SBAIJ,n,irow,icol,MAT_REUSE_MATRIX,&subSBAIJ)); 45c4762a1bSJed Brown 46*9566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 47dd400576SPatrick Sanan if (rank == 0) { 48*9566063dSJacob Faibussowitsch PetscCall(MatView(subBAIJ[0],PETSC_VIEWER_STDOUT_SELF)); 49*9566063dSJacob Faibussowitsch PetscCall(MatView(subSBAIJ[0],PETSC_VIEWER_STDOUT_SELF)); 50c4762a1bSJed Brown } 51c4762a1bSJed Brown 52c4762a1bSJed Brown /* Free data structures */ 53*9566063dSJacob Faibussowitsch PetscCall(ISDestroy(&isrow)); 54*9566063dSJacob Faibussowitsch PetscCall(ISDestroy(&iscol)); 55*9566063dSJacob Faibussowitsch PetscCall(MatDestroySubMatrices(n,&subBAIJ)); 56*9566063dSJacob Faibussowitsch PetscCall(MatDestroySubMatrices(n,&subSBAIJ)); 57*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&BAIJ)); 58*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&SBAIJ)); 59c4762a1bSJed Brown 60*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 61b122ec5aSJacob Faibussowitsch return 0; 62c4762a1bSJed Brown } 63