On Apr 26, 2012, at 10:31 AM, behzad baghapour wrote: > Thanks. It did work! > > Then how I should do for changing the tolerance of ksp? (changing from > inexact into exact Newton phase) > > Thanks a lot, >
Hong already answered that behzad : I set SNES with -snes_ksp_ew to solve the system with inexact method. I want to reset the SNES into exact Newton with changing the KSP rtol at final iterations (in full Newton phase). How can I reset the KSP tolerance after specific iterations of SNES? You can use SNESMonitorSet() and write your own monitor function to do this: http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/SNES/SNESMonitorSet.html Hong
