Actual source code: ex122.c

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

  3: #include <petscmat.h>

  5: int main(int argc,char **argv)
  6: {
  7:   Mat            A,B,C;
  8:   PetscInt       M=10,N=5;
  9:   PetscRandom    r;
 10:   PetscBool      equal=PETSC_FALSE;
 11:   PetscReal      fill = 1.0;
 12:   PetscInt       nza,am,an;

 14:   PetscInitialize(&argc,&argv,(char*)0,help);
 15:   PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);
 16:   PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);
 17:   PetscOptionsGetReal(NULL,NULL,"-fill",&fill,NULL);

 19:   PetscRandomCreate(PETSC_COMM_WORLD,&r);
 20:   PetscRandomSetFromOptions(r);

 22:   /* create a aij matrix A */
 23:   MatCreate(PETSC_COMM_WORLD,&A);
 24:   MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,N,M);
 25:   MatSetType(A,MATAIJ);
 26:   nza  = (PetscInt)(.3*M); /* num of nozeros in each row of A */
 27:   MatSeqAIJSetPreallocation(A,nza,NULL);
 28:   MatMPIAIJSetPreallocation(A,nza,NULL,nza,NULL);
 29:   MatSetRandom(A,r);

 31:   /* create a dense matrix B */
 32:   MatGetLocalSize(A,&am,&an);
 33:   MatCreate(PETSC_COMM_WORLD,&B);
 34:   MatSetSizes(B,PETSC_DECIDE,am,N,PETSC_DECIDE);
 35:   MatSetType(B,MATDENSE);
 36:   MatSeqDenseSetPreallocation(B,NULL);
 37:   MatMPIDenseSetPreallocation(B,NULL);
 38:   MatSetRandom(B,r);
 39:   PetscRandomDestroy(&r);
 40:   MatAssemblyBegin(B,MAT_FINAL_ASSEMBLY);
 41:   MatAssemblyEnd(B,MAT_FINAL_ASSEMBLY);

 43:   /* Test MatMatMult() */
 44:   MatMatMult(B,A,MAT_INITIAL_MATRIX,fill,&C);
 45:   MatMatMult(B,A,MAT_REUSE_MATRIX,fill,&C);
 46:   MatMatMultEqual(B,A,C,10,&equal);

 49:   MatDestroy(&C);
 50:   MatDestroy(&B);
 51:   MatDestroy(&A);
 52:   PetscFinalize();
 53:   return 0;
 54: }

 56: /*TEST

 58:    test:
 59:       output_file: output/ex122.out

 61: TEST*/