Also, the coarsening algorithms may be different on the CPU and GPU runs
(hypre does coarsening on the GPU). Even if the algorithms are
nominally the same there could be differences in, for example, the vertex
ordering in greedy coarsening algorithms that results in slightly different
"C" point
Probably some of these questions are best asked to the hypre folks. But I can
answer some
> On Nov 24, 2022, at 11:19 AM, nicola varini wrote:
>
> Dear all, I am comparing the HYPRE boomeramg preconditioner on CPU and GPU.
> It looks like the defaults are different, therefore I tried to
Dear all, I am comparing the HYPRE boomeramg preconditioner on CPU and GPU.
It looks like the defaults are different, therefore I tried to specify the
match the options.
I have a few observations/questions:
1) Why are the residuals at step 0 different?
2) If the options are the same the number of
