Hi Petsc Developers, I was using a preconditioner of ASM with subpc ILU, (outside KSP is BCGS). I have an impression that ASM is somewhat close to block-Jacobi in a parallel sense. Then I was thinking to do multiple preconditioning for the whole system to increase the convergence behavior on the boundary equations. However I can't find any options that I can increase the "passes" of preconditioner usage.
I was also trying "-pc_type composite", then specifying "-pc_composite_pcs asm,asm", and "-sub_pc_type ilu", this gave me error of ilu can not run in parallel. But I was intended to run ilu as sub_pc inside each domain. I'm not sure if my idea makes sense or I missed something in the manual. Thanks for the help. Chun This email and any attachments are intended solely for the use of the individual or entity to whom it is addressed and may be confidential and/or privileged. If you are not one of the named recipients or have received this email in error, (i) you should not read, disclose, or copy it, (ii) please notify sender of your receipt by reply email and delete this email and all attachments, (iii) Dassault Systemes does not accept or assume any liability or responsibility for any use of or reliance on this email.For other languages, go to http://www.3ds.com/terms/email-disclaimer.
