1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatCreateSubmatrix() with entire matrix, modified from ex59.c."; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat C,A,Adup; 9c4762a1bSJed Brown PetscInt i,j,m = 3,n = 2,rstart,rend; 10c4762a1bSJed Brown PetscMPIInt size,rank; 11c4762a1bSJed Brown PetscErrorCode ierr; 12c4762a1bSJed Brown PetscScalar v; 13c4762a1bSJed Brown IS isrow; 14c4762a1bSJed Brown PetscBool detect_bug = PETSC_FALSE; 15c4762a1bSJed Brown 16c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 17*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsHasName(NULL,NULL,"-detect_bug",&detect_bug)); 18*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 19*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 20c4762a1bSJed Brown n = 2*size; 21c4762a1bSJed Brown 22*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&C)); 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 24*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(C)); 25*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetUp(C)); 26c4762a1bSJed Brown 27c4762a1bSJed Brown /* 28c4762a1bSJed Brown This is JUST to generate a nice test matrix, all processors fill up 29c4762a1bSJed Brown the entire matrix. This is not something one would ever do in practice. 30c4762a1bSJed Brown */ 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOwnershipRange(C,&rstart,&rend)); 32c4762a1bSJed Brown for (i=rstart; i<rend; i++) { 33c4762a1bSJed Brown for (j=0; j<m*n; j++) { 34c4762a1bSJed Brown v = i + j + 1; 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES)); 36c4762a1bSJed Brown } 37c4762a1bSJed Brown } 38*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 39*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 40*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_COMMON)); 41*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 42*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 43c4762a1bSJed Brown 44c4762a1bSJed Brown /* 45c4762a1bSJed Brown Generate a new matrix consisting every row and column of the original matrix 46c4762a1bSJed Brown */ 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatGetOwnershipRange(C,&rstart,&rend)); 48c4762a1bSJed Brown 49c4762a1bSJed Brown /* Create parallel IS with the rows we want on THIS processor */ 50dd400576SPatrick Sanan if (detect_bug && rank == 0) { 51*5f80ce2aSJacob Faibussowitsch CHKERRQ(ISCreateStride(PETSC_COMM_WORLD,1,rstart,1,&isrow)); 52c4762a1bSJed Brown } else { 53*5f80ce2aSJacob Faibussowitsch CHKERRQ(ISCreateStride(PETSC_COMM_WORLD,rend-rstart,rstart,1,&isrow)); 54c4762a1bSJed Brown } 55*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateSubMatrix(C,isrow,NULL,MAT_INITIAL_MATRIX,&A)); 56c4762a1bSJed Brown 57c4762a1bSJed Brown /* Change C to test the case MAT_REUSE_MATRIX */ 58dd400576SPatrick Sanan if (rank == 0) { 59c4762a1bSJed Brown i = 0; j = 0; v = 100; 60*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES)); 61c4762a1bSJed Brown } 62*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 63*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 64c4762a1bSJed Brown 65*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateSubMatrix(C,isrow,NULL,MAT_REUSE_MATRIX,&A)); 66*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_COMMON)); 67*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 68*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 69c4762a1bSJed Brown 70c4762a1bSJed Brown /* Test MatDuplicate */ 71*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDuplicate(A,MAT_COPY_VALUES,&Adup)); 72*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&Adup)); 73c4762a1bSJed Brown 74*5f80ce2aSJacob Faibussowitsch CHKERRQ(ISDestroy(&isrow)); 75*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 76*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&C)); 77c4762a1bSJed Brown ierr = PetscFinalize(); 78c4762a1bSJed Brown return ierr; 79c4762a1bSJed Brown } 80c4762a1bSJed Brown 81c4762a1bSJed Brown /*TEST 82c4762a1bSJed Brown 83c4762a1bSJed Brown test: 84c4762a1bSJed Brown nsize: 2 85c4762a1bSJed Brown filter: grep -v "Mat Object" 86c4762a1bSJed Brown requires: !complex 87c4762a1bSJed Brown 88c4762a1bSJed Brown test: 89c4762a1bSJed Brown suffix: 2 90c4762a1bSJed Brown nsize: 3 91c4762a1bSJed Brown args: -detect_bug 92c4762a1bSJed Brown filter: grep -v "Mat Object" 93c4762a1bSJed Brown requires: !complex 94c4762a1bSJed Brown 95c4762a1bSJed Brown TEST*/ 96