[petsc-users] Advices to decrease bicgstab iterations

[Edoardo alinovi]

Dear petsc users,

I am doing some calculations to test my code in parallel using petsc. With
respect the serial code, which uses an in house bicstab+diagonal ILU
preconditioner, I note that petsc's bicgstab+ASM with standard options need
a larger number of iterations to converge (order 3 to 5). In base on your
expirience, do you have any method to improve the preconditioning?

Thak you  ery much,

Edoardo
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