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*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&args,(char*)0,help)); 175f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 185f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 19c4762a1bSJed Brown n = 2*size; 20c4762a1bSJed Brown 21c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 225f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&C)); 235f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 245f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(C)); 255f80ce2aSJacob Faibussowitsch CHKERRQ(MatMPIAIJSetPreallocation(C,5,NULL,5,NULL)); 265f80ce2aSJacob Faibussowitsch CHKERRQ(MatSeqAIJSetPreallocation(C,5,NULL)); 27c4762a1bSJed Brown for (i=0; i<m; i++) { 28c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 29c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 305f80ce2aSJacob Faibussowitsch if (i>0) {J = Ii - n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 315f80ce2aSJacob Faibussowitsch if (i<m-1) {J = Ii + n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 325f80ce2aSJacob Faibussowitsch if (j>0) {J = Ii - 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 335f80ce2aSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 345f80ce2aSJacob Faibussowitsch v = 4.0; CHKERRQ(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 35c4762a1bSJed Brown } 36c4762a1bSJed Brown } 375f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 385f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 395f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO)); 405f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 415f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 425f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 43c4762a1bSJed Brown 445f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOwnershipRange(C,&rstart,&rend)); 45c4762a1bSJed Brown for (i=rstart; i<rend; i++) { 465f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetRow(C,i,&nz,&idx,&values)); 475f80ce2aSJacob Faibussowitsch CHKERRQ(PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"[%d] get row %" PetscInt_FMT ": ",rank,i)); 48c4762a1bSJed Brown for (j=0; j<nz; j++) { 495f80ce2aSJacob Faibussowitsch CHKERRQ(PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"%" PetscInt_FMT " %g ",idx[j],(double)PetscRealPart(values[j]))); 50c4762a1bSJed Brown } 515f80ce2aSJacob Faibussowitsch CHKERRQ(PetscSynchronizedFPrintf(PETSC_COMM_WORLD,stdout,"\n")); 525f80ce2aSJacob Faibussowitsch CHKERRQ(MatRestoreRow(C,i,&nz,&idx,&values)); 53c4762a1bSJed Brown } 545f80ce2aSJacob Faibussowitsch CHKERRQ(PetscSynchronizedFlush(PETSC_COMM_WORLD,stdout)); 55c4762a1bSJed Brown 565f80ce2aSJacob Faibussowitsch CHKERRQ(MatConvert(C,MATSAME,MAT_INITIAL_MATRIX,&A)); 575f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO)); 585f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 595f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 605f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 61c4762a1bSJed Brown 625f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 635f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&C)); 64*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 65*b122ec5aSJacob Faibussowitsch return 0; 66c4762a1bSJed Brown } 67c4762a1bSJed Brown 68c4762a1bSJed Brown /*TEST 69c4762a1bSJed Brown 70c4762a1bSJed Brown test: 71c4762a1bSJed Brown args: -mat_type seqaij 72c4762a1bSJed Brown 73c4762a1bSJed Brown TEST*/ 74