1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests converting a parallel AIJ formatted matrix to the parallel Row format.\n\ 3c4762a1bSJed Brown This also tests MatGetRow() and MatRestoreRow() for the parallel case.\n\n"; 4c4762a1bSJed Brown 5c4762a1bSJed Brown #include <petscmat.h> 6c4762a1bSJed Brown 7c4762a1bSJed Brown int main(int argc,char **args) 8c4762a1bSJed Brown { 9c4762a1bSJed Brown Mat C,A; 10c4762a1bSJed Brown PetscInt i,j,m = 3,n = 2,Ii,J,rstart,rend,nz; 11c4762a1bSJed Brown PetscMPIInt rank,size; 12c4762a1bSJed Brown const PetscInt *idx; 13c4762a1bSJed Brown PetscScalar v; 14c4762a1bSJed Brown const PetscScalar *values; 15c4762a1bSJed Brown 16*327415f7SBarry Smith PetscFunctionBeginUser; 179566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 189566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 199566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 20c4762a1bSJed Brown n = 2*size; 21c4762a1bSJed Brown 22c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 239566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&C)); 249566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 259566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 269566063dSJacob Faibussowitsch PetscCall(MatMPIAIJSetPreallocation(C,5,NULL,5,NULL)); 279566063dSJacob Faibussowitsch PetscCall(MatSeqAIJSetPreallocation(C,5,NULL)); 28c4762a1bSJed Brown for (i=0; i<m; i++) { 29c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 30c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 319566063dSJacob Faibussowitsch if (i>0) {J = Ii - n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 329566063dSJacob Faibussowitsch if (i<m-1) {J = Ii + n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 339566063dSJacob Faibussowitsch if (j>0) {J = Ii - 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 349566063dSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 359566063dSJacob Faibussowitsch v = 4.0; PetscCall(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 36c4762a1bSJed Brown } 37c4762a1bSJed Brown } 389566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 399566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 409566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO)); 419566063dSJacob Faibussowitsch PetscCall(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 429566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 439566063dSJacob Faibussowitsch PetscCall(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 44c4762a1bSJed Brown 459566063dSJacob Faibussowitsch PetscCall(MatGetOwnershipRange(C,&rstart,&rend)); 46c4762a1bSJed Brown for (i=rstart; i<rend; i++) { 479566063dSJacob Faibussowitsch PetscCall(MatGetRow(C,i,&nz,&idx,&values)); 489566063dSJacob Faibussowitsch PetscCall(PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"[%d] get row %" PetscInt_FMT ": ",rank,i)); 49c4762a1bSJed Brown for (j=0; j<nz; j++) { 509566063dSJacob Faibussowitsch PetscCall(PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"%" PetscInt_FMT " %g ",idx[j],(double)PetscRealPart(values[j]))); 51c4762a1bSJed Brown } 529566063dSJacob Faibussowitsch PetscCall(PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"\n")); 539566063dSJacob Faibussowitsch PetscCall(MatRestoreRow(C,i,&nz,&idx,&values)); 54c4762a1bSJed Brown } 559566063dSJacob Faibussowitsch PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD,stdout)); 56c4762a1bSJed Brown 579566063dSJacob Faibussowitsch PetscCall(MatConvert(C,MATSAME,MAT_INITIAL_MATRIX,&A)); 589566063dSJacob Faibussowitsch PetscCall(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO)); 599566063dSJacob Faibussowitsch PetscCall(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 609566063dSJacob Faibussowitsch PetscCall(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 619566063dSJacob Faibussowitsch PetscCall(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 62c4762a1bSJed Brown 639566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 649566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 659566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 66b122ec5aSJacob Faibussowitsch return 0; 67c4762a1bSJed Brown } 68c4762a1bSJed Brown 69c4762a1bSJed Brown /*TEST 70c4762a1bSJed Brown 71c4762a1bSJed Brown test: 72c4762a1bSJed Brown args: -mat_type seqaij 73c4762a1bSJed Brown 74c4762a1bSJed Brown TEST*/ 75