Actual source code: ex21.c


  2: static char help[] = "Tests VecMax() with index.\n\
  3:   -n <length> : vector length\n\n";

  5: #include <petscvec.h>

  7: int main(int argc,char **argv)
  8: {
 10:   PetscInt       n = 5,idx;
 11:   PetscReal      value,value2;
 12:   Vec            x;
 13:   PetscScalar    one = 1.0;

 15:   PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
 16:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);

 18:   /* create vector */
 19:   VecCreate(PETSC_COMM_WORLD,&x);
 20:   VecSetSizes(x,PETSC_DECIDE,n);
 21:   VecSetFromOptions(x);

 23:   VecSet(x,one);
 24:   VecSetValue(x,0,0.0,INSERT_VALUES);
 25:   VecSetValue(x,n-1,2.0,INSERT_VALUES);
 26:   VecAssemblyBegin(x);
 27:   VecAssemblyEnd(x);
 28:   VecView(x,PETSC_VIEWER_STDOUT_WORLD);
 29:   VecMax(x,&idx,&value);
 30:   VecMax(x,NULL,&value2);
 31:   PetscPrintf(PETSC_COMM_WORLD,"Maximum value %g index %D (no index %g)\n",(double)value,idx,(double)value2);
 32:   VecMin(x,&idx,&value);
 33:   VecMin(x,NULL,&value2);
 34:   PetscPrintf(PETSC_COMM_WORLD,"Minimum value %g index %D (no index %g)\n",(double)value,idx,(double)value2);

 36:   VecDestroy(&x);

 38:   PetscFinalize();
 39:   return ierr;
 40: }

 42: /*TEST

 44:    testset:
 45:       diff_args: -j
 46:       filter: grep -v type
 47:       output_file: output/ex21_1.out

 49:       test:
 50:          suffix: 1

 52:       test:
 53:          requires: cuda
 54:          suffix: 1_cuda
 55:          args: -vec_type cuda

 57:       test:
 58:          requires: kokkos_kernels
 59:          suffix: 1_kokkos
 60:          args: -vec_type kokkos

 62:       test:
 63:          requires: hip
 64:          suffix: 1_hip
 65:          args: -vec_type hip

 67:    testset:
 68:       diff_args: -j
 69:       filter: grep -v type
 70:       output_file: output/ex21_2.out
 71:       nsize: 2

 73:       test:
 74:          suffix: 2

 76:       test:
 77:          requires: cuda
 78:          suffix: 2_cuda
 79:          args: -vec_type cuda

 81:       test:
 82:          requires: kokkos_kernels
 83:          suffix: 2_kokkos
 84:          args: -vec_type kokkos

 86:       test:
 87:          requires: hip
 88:          suffix: 2_hip
 89:          args: -vec_type hip

 91: TEST*/