1 static char help[] = "Test MatMatMult() for AIJ and Dense matrices.\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc,char **argv) 6 { 7 Mat A,B,C,D; 8 PetscInt i,M,N,Istart,Iend,n=7,j,J,Ii,m=8,am,an; 9 PetscScalar v; 10 PetscErrorCode ierr; 11 PetscRandom r; 12 PetscBool equal=PETSC_FALSE; 13 PetscReal fill = 1.0; 14 PetscMPIInt size; 15 16 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 17 ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 18 ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 19 ierr = PetscOptionsGetReal(NULL,NULL,"-fill",&fill,NULL);CHKERRQ(ierr); 20 21 ierr = PetscRandomCreate(PETSC_COMM_WORLD,&r);CHKERRQ(ierr); 22 ierr = PetscRandomSetFromOptions(r);CHKERRQ(ierr); 23 24 /* Create a aij matrix A */ 25 M = N = m*n; 26 ierr = MatCreate(PETSC_COMM_WORLD,&A);CHKERRQ(ierr); 27 ierr = MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,M,N);CHKERRQ(ierr); 28 ierr = MatSetType(A,MATAIJ);CHKERRQ(ierr); 29 ierr = MatSetFromOptions(A);CHKERRQ(ierr); 30 ierr = MatMPIAIJSetPreallocation(A,5,NULL,5,NULL);CHKERRQ(ierr); 31 ierr = MatSeqAIJSetPreallocation(A,5,NULL);CHKERRQ(ierr); 32 33 ierr = MatGetOwnershipRange(A,&Istart,&Iend);CHKERRQ(ierr); 34 am = Iend - Istart; 35 for (Ii=Istart; Ii<Iend; Ii++) { 36 v = -1.0; i = Ii/n; j = Ii - i*n; 37 if (i>0) {J = Ii - n; ierr = MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 38 if (i<m-1) {J = Ii + n; ierr = MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 39 if (j>0) {J = Ii - 1; ierr = MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 40 if (j<n-1) {J = Ii + 1; ierr = MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 41 v = 4.0; ierr = MatSetValues(A,1,&Ii,1,&Ii,&v,INSERT_VALUES);CHKERRQ(ierr); 42 } 43 ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 44 ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 45 46 /* Create a dense matrix B */ 47 ierr = MatGetLocalSize(A,&am,&an);CHKERRQ(ierr); 48 ierr = MatCreate(PETSC_COMM_WORLD,&B);CHKERRQ(ierr); 49 ierr = MatSetSizes(B,an,PETSC_DECIDE,PETSC_DECIDE,M);CHKERRQ(ierr); 50 ierr = MatSetType(B,MATDENSE);CHKERRQ(ierr); 51 ierr = MatSeqDenseSetPreallocation(B,NULL);CHKERRQ(ierr); 52 ierr = MatMPIDenseSetPreallocation(B,NULL);CHKERRQ(ierr); 53 ierr = MatSetFromOptions(B);CHKERRQ(ierr); 54 ierr = MatSetRandom(B,r);CHKERRQ(ierr); 55 ierr = PetscRandomDestroy(&r);CHKERRQ(ierr); 56 ierr = MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 57 ierr = MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 58 59 /* Test C = A*B (aij*dense) */ 60 ierr = MatMatMult(A,B,MAT_INITIAL_MATRIX,fill,&C);CHKERRQ(ierr); 61 ierr = MatMatMult(A,B,MAT_REUSE_MATRIX,fill,&C);CHKERRQ(ierr); 62 63 ierr = MatMatMultSymbolic(A,B,fill,&D);CHKERRQ(ierr); 64 for (i=0; i<2; i++) { 65 ierr = MatMatMultNumeric(A,B,D);CHKERRQ(ierr); 66 } 67 ierr = MatEqual(C,D,&equal);CHKERRQ(ierr); 68 if (!equal) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE,"C != D"); 69 ierr = MatDestroy(&D);CHKERRQ(ierr); 70 71 /* Test D = C*A (dense*aij) */ 72 ierr = MatMatMult(C,A,MAT_INITIAL_MATRIX,fill,&D);CHKERRQ(ierr); 73 ierr = MatMatMult(C,A,MAT_REUSE_MATRIX,fill,&D);CHKERRQ(ierr); 74 ierr = MatDestroy(&D);CHKERRQ(ierr); 75 76 /* Test D = A*C (aij*dense) */ 77 ierr = MatMatMult(A,C,MAT_INITIAL_MATRIX,fill,&D);CHKERRQ(ierr); 78 ierr = MatMatMult(A,C,MAT_REUSE_MATRIX,fill,&D);CHKERRQ(ierr); 79 ierr = MatDestroy(&D);CHKERRQ(ierr); 80 81 /* Test D = B*C (dense*dense) */ 82 ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 83 if (size == 1) { 84 ierr = MatMatMult(B,C,MAT_INITIAL_MATRIX,fill,&D);CHKERRQ(ierr); 85 ierr = MatMatMult(B,C,MAT_REUSE_MATRIX,fill,&D);CHKERRQ(ierr); 86 ierr = MatDestroy(&D);CHKERRQ(ierr); 87 } 88 89 ierr = MatDestroy(&C);CHKERRQ(ierr); 90 ierr = MatDestroy(&B);CHKERRQ(ierr); 91 ierr = MatDestroy(&A);CHKERRQ(ierr); 92 ierr = PetscFinalize(); 93 return ierr; 94 } 95 96 97 /*TEST 98 99 test: 100 args: -M 10 -N 10 101 output_file: output/ex109.out 102 103 test: 104 suffix: 2 105 nsize: 3 106 output_file: output/ex109.out 107 108 TEST*/ 109