1: static char help[] = "Test MatMatMult() for AIJ and Dense matrices.\n\n";

  3: #include <petscmat.h>

  7: int main(int argc,char **argv)
  8: {
  9:   Mat            A,B,C,D;
 10:   PetscInt       i,M,N,Istart,Iend,n=7,j,J,Ii,m=8,am,an;
 11:   PetscScalar    v;
 13:   PetscRandom    r;
 14:   PetscBool      equal=PETSC_FALSE;
 15:   PetscReal      fill = 1.0;
 16:   PetscMPIInt    size;

 18:   PetscInitialize(&argc,&argv,(char*)0,help);
 19:   PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);
 20:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
 21:   PetscOptionsGetReal(NULL,NULL,"-fill",&fill,NULL);

 23:   PetscRandomCreate(PETSC_COMM_WORLD,&r);
 24:   PetscRandomSetFromOptions(r);

 26:   /* Create a aij matrix A */
 27:   M    = N = m*n;
 28:   MatCreate(PETSC_COMM_WORLD,&A);
 29:   MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,M,N);
 30:   MatSetType(A,MATAIJ);
 31:   MatSetFromOptions(A);
 32:   MatMPIAIJSetPreallocation(A,5,NULL,5,NULL);
 33:   MatSeqAIJSetPreallocation(A,5,NULL);

 35:   MatGetOwnershipRange(A,&Istart,&Iend);
 36:   am   = Iend - Istart;
 37:   for (Ii=Istart; Ii<Iend; Ii++) {
 38:     v = -1.0; i = Ii/n; j = Ii - i*n;
 39:     if (i>0)   {J = Ii - n; MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);}
 40:     if (i<m-1) {J = Ii + n; MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);}
 41:     if (j>0)   {J = Ii - 1; MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);}
 42:     if (j<n-1) {J = Ii + 1; MatSetValues(A,1,&Ii,1,&J,&v,INSERT_VALUES);}
 43:     v = 4.0; MatSetValues(A,1,&Ii,1,&Ii,&v,INSERT_VALUES);
 44:   }
 45:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 46:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 48:   /* Create a dense matrix B */
 49:   MatGetLocalSize(A,&am,&an);
 50:   MatCreate(PETSC_COMM_WORLD,&B);
 51:   MatSetSizes(B,an,PETSC_DECIDE,PETSC_DECIDE,M);
 52:   MatSetType(B,MATDENSE);
 53:   MatSeqDenseSetPreallocation(B,NULL);
 54:   MatMPIDenseSetPreallocation(B,NULL);
 55:   MatSetFromOptions(B);
 56:   MatSetRandom(B,r);
 57:   PetscRandomDestroy(&r);
 58:   MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
 59:   MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);

 61:   /* Test C = A*B (aij*dense) */
 62:   MatMatMult(A,B,MAT_INITIAL_MATRIX,fill,&C);
 63:   MatMatMult(A,B,MAT_REUSE_MATRIX,fill,&C);

 65:   MatMatMultSymbolic(A,B,fill,&D);
 66:   for (i=0; i<2; i++) {
 67:     MatMatMultNumeric(A,B,D);
 68:   }
 69:   MatEqual(C,D,&equal);
 70:   if (!equal) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE,"C != D");
 71:   MatDestroy(&D);

 73:   /* Test D = C*A (dense*aij) */
 74:   MatMatMult(C,A,MAT_INITIAL_MATRIX,fill,&D);
 75:   MatMatMult(C,A,MAT_REUSE_MATRIX,fill,&D);
 76:   MatDestroy(&D);

 78:   /* Test D = A*C (aij*dense) */
 79:   MatMatMult(A,C,MAT_INITIAL_MATRIX,fill,&D);
 80:   MatMatMult(A,C,MAT_REUSE_MATRIX,fill,&D);
 81:   MatDestroy(&D);

 83:   /* Test D = B*C (dense*dense) */
 84:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 85:   if (size == 1) {
 86:     MatMatMult(B,C,MAT_INITIAL_MATRIX,fill,&D);
 87:     MatMatMult(B,C,MAT_REUSE_MATRIX,fill,&D);
 88:     MatDestroy(&D);
 89:   }

 91:   MatDestroy(&C);
 92:   MatDestroy(&B);
 93:   MatDestroy(&A);
 94:   PetscFinalize();
 95:   return(0);
 96: }