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
