Re: [starpu-devel] [stencil based code: omitting last row and last column]

[Samuel Thibault <samuel.thibault@inria.fr>]

Samuel Thibault, le mar. 30 juil. 2024 14:24:21 +0200, a ecrit:
> Maxim Abalenkov, le mar. 30 juil. 2024 13:24:24 +0400, a ecrit:
> > I need to omit updating the boundary elements (last row and last column 
> > elements) of my array. Please see the figure attached. The top left grid 
> > depicts the first update stage where the last row needs omitting from the 
> > calculation. The bottom left grid shows the second update stage, where 
> > the last column of elements needs omitting. The shaded regions are the 
> > elements I need to skip.
> > 
> > My question is: does StarPU have helper routines to skip calculation in 
> > those regions?
> 
> The starpu_vector_interface does not contain such information. But you
> can introduce your own data interface with the added field, and
> copy/paste the starpu_vector_filter_block function to add the update of
> the field.

(you'll also need to copy/paste the implementation of the vector
interface src/datawizard/interfaces/vector_interface.c)

Samuel