Hi, I am solving a poisson eqn and using hypre as a preconditioner has greatly increased the speed. I am trying to do some more tuning and I have some questions:
1. Is boomerAMG the only option? What are the other hypre conditioners available? Is there any documentation somewhere? Is hypre just a preconditioner or can it be a solver as well? 2. what does the preonly in ksp_type mean? Is the eqns solved? 3. why can't I use bcgs or bicg with hypre? Also, can cg be used for non-symmetric matrix. It seems to work. Thank you very much. Regards. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20070409/ca903210/attachment.htm>
