-pc_mg_log doesn't have anything to do with DA or DMMG it is part of the basic PCMG. Are you sure you are calling SNESSetFromOptions()?
Barry On Apr 3, 2012, at 6:56 PM, Yuqi Wu wrote: > Hi, Mark, > > Thank you so much for your suggestion. > > The problem 1 is resolved by avoiding calling PCMGSetNumberSmoothUp. > > But since I am using the unstructured grid in my application, I didn't use DA > or dmmg, so -pc_mg_log didn't give any level information. I try to run my > code using -info with 1 processor, and I find out some interesting issues.
