ksp tutorial ex22

[Ryan Yan]

Hi all,
I was looking at the ex22 of ksp.

If I call:
...
ierr = DMMGCreate(PETSC_COMM_WORLD,3,PETSC_NULL,&dmmg);CHKERRQ(ierr);
ierr =
DACreate3d(PETSC_COMM_WORLD,DA_NONPERIODIC,DA_STENCIL_STAR,-3,-3,-3,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,1,1,0,0,0,&da);CHKERRQ(ierr);

  ...

How many grid pts should I have on the finest level? Is it 27, considering I
am set 3 as the global dimension in each direction of the array?

When I run ex22 with -ksp_view, I saw that  on the finest level there are 9
pts on each direction.

Is that because I have 3 level?

Yan
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