[petsc-users] Superlu based ILUT report Zero pivot

[Gong Ding]

Hi,
I tried ASM + Superlu ILUT for my semicondcutor simulation code.
For most of the problems, the ILUT preconditioner is very strong.
Fewer KSP iterations are needed to get linear solver convergence compared with default ILU(0) preconditioner.
However, ILUT is a bit slow with its default parameters.
And sometimes it fault with
Fatal Error:Zero pivot in row 74 at line 186 in superlu.c
 
Any suggestion to set some parameters to make it more rubost (and fast)?

Gong Ding