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<p>Thanks Matt, it works!</p>
<p>Anton<br>
</p>
<div class="moz-cite-prefix">On 26.08.25 22:34, Matthew Knepley
wrote:<br>
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<div dir="ltr">On Tue, Aug 26, 2025 at 12:45 PM Anton Popov <<a
href="mailto:popov@uni-mainz.de" moz-do-not-send="true"
class="moz-txt-link-freetext">popov@uni-mainz.de</a>>
wrote:</div>
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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>
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<div>Yes, and as Mark says, you can see the prefix if you View
the solver.</div>
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<div> Thanks,</div>
<div><br>
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<div> Matt</div>
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style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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>
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<span class="gmail_signature_prefix">-- </span><br>
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<div>What most experimenters take for granted before
they begin their experiments is infinitely more
interesting than any results to which their
experiments lead.<br>
-- Norbert Wiener</div>
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