See the manual page for PCSHELL
On May 7, 2009, at 4:09 PM, Shao-Ching Huang wrote: > Hi, > > In a parallel PCG solve, is there a way to instruct PETSc to call my > own (serial) solver to invert the per-process, local precondition > matrix (as in the block-Jacobi preconditioner)? > > Is there an example/documentation that I can follow? Which part of > code should I start looking at? > > We are trying to determine if there is any value to use the > aforementioned customized preconditioner as compared to the general > ones in PETSc and to DMMG, for this particular matrix at hand. This > is a structured mesh problem. > > Thank you. > > Shao-Ching
