There is an important addition, I use asm and bjacobi as smoothers on multigrid levels.

So I probably need to set the options with -mg_levels_sub_, or -mg_levels_3_sub_(if they are different on different levels), instead of just -sub_.

Correct?

Anton



On 26.08.25 18:20, Anton Popov wrote:
Hi all,

I have a strange behavior setting the solver options for asm and bjacobi blocks.

Irrespective of what I set with -sub_ksp_ -sub_pc_ it just selects the default preonly and ilu options.

This behavior does not change no matter how many local blocks per cpu I try to use, for example with the default one block/cpu it does not work as well.

Is there anything wrong?

Best,

Anton

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