1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests sequential and parallel MatGetRow() and MatRestoreRow().\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat C; 9c4762a1bSJed Brown PetscInt i,j,m = 5,n = 5,Ii,J,nz,rstart,rend; 10c4762a1bSJed Brown PetscMPIInt rank; 11c4762a1bSJed Brown const PetscInt *idx; 12c4762a1bSJed Brown PetscScalar v; 13c4762a1bSJed Brown const PetscScalar *values; 14c4762a1bSJed Brown 15*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&args,(char*)0,help)); 16c4762a1bSJed Brown /* Create the matrix for the five point stencil, YET AGAIN */ 175f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&C)); 185f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 195f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(C)); 205f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetUp(C)); 21c4762a1bSJed Brown for (i=0; i<m; i++) { 22c4762a1bSJed Brown for (j=0; j<n; j++) { 23c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 245f80ce2aSJacob Faibussowitsch if (i>0) {J = Ii - n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 255f80ce2aSJacob Faibussowitsch if (i<m-1) {J = Ii + n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 265f80ce2aSJacob Faibussowitsch if (j>0) {J = Ii - 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 275f80ce2aSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 285f80ce2aSJacob Faibussowitsch v = 4.0; CHKERRQ(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 29c4762a1bSJed Brown } 30c4762a1bSJed Brown } 315f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 325f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 335f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 34c4762a1bSJed Brown 355f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 365f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOwnershipRange(C,&rstart,&rend)); 37c4762a1bSJed Brown for (i=rstart; i<rend; i++) { 385f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetRow(C,i,&nz,&idx,&values)); 39dd400576SPatrick Sanan if (rank == 0) { 40c4762a1bSJed Brown for (j=0; j<nz; j++) { 415f80ce2aSJacob Faibussowitsch CHKERRQ(PetscPrintf(PETSC_COMM_SELF,"%" PetscInt_FMT " %g ",idx[j],(double)PetscRealPart(values[j]))); 42c4762a1bSJed Brown } 435f80ce2aSJacob Faibussowitsch CHKERRQ(PetscPrintf(PETSC_COMM_SELF,"\n")); 44c4762a1bSJed Brown } 455f80ce2aSJacob Faibussowitsch CHKERRQ(MatRestoreRow(C,i,&nz,&idx,&values)); 46c4762a1bSJed Brown } 47c4762a1bSJed Brown 485f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&C)); 49*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 50*b122ec5aSJacob Faibussowitsch return 0; 51c4762a1bSJed Brown } 52c4762a1bSJed Brown 53c4762a1bSJed Brown /*TEST 54c4762a1bSJed Brown 55c4762a1bSJed Brown test: 56c4762a1bSJed Brown 57c4762a1bSJed Brown TEST*/ 58