[petsc-users] subdomain solver options

Anton Popov popov at uni-mainz.de
Tue Aug 26 11:20:22 CDT 2025


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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