<div dir="ltr">Run with -options_left and -ksp_view<div><br></div><div>You will see options left, not used, printed at the end and in the KSP view output you will see the option to use like:</div><div><br></div><div> PC Object: (mg_levels_1_) 128 MPI processes<br> type: redundant</div><div><br></div><div><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Aug 26, 2025 at 12:36 PM Anton Popov <<a href="mailto:popov@uni-mainz.de">popov@uni-mainz.de</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">There is an important addition, I use asm and bjacobi as smoothers on <br>
multigrid levels.<br>
<br>
So I probably need to set the options with -mg_levels_sub_, or <br>
-mg_levels_3_sub_(if they are different on different levels), instead of <br>
just -sub_.<br>
<br>
Correct?<br>
<br>
Anton<br>
<br>
<br>
<br>
On 26.08.25 18:20, Anton Popov wrote:<br>
> Hi all,<br>
><br>
> I have a strange behavior setting the solver options for asm and <br>
> bjacobi blocks.<br>
><br>
> Irrespective of what I set with -sub_ksp_ -sub_pc_ it just selects the <br>
> default preonly and ilu options.<br>
><br>
> This behavior does not change no matter how many local blocks per cpu <br>
> I try to use, for example with the default one block/cpu it does not <br>
> work as well.<br>
><br>
> Is there anything wrong?<br>
><br>
> Best,<br>
><br>
> Anton<br>
><br>
</blockquote></div>